Page 1 Preface Contents Introduction SIPROTEC Functions Motor Protection Mounting and Commissioning 7SK80 Technical Data V4.6 Appendix Literature Manual Glossary Index E50417-G1140-C344-A4...
Page 2 SIPROTEC, SINAUT, SICAM and DIGSI are registered trademarks Document version V04.03.01. of Siemens AG. Other designations in this manual might be trade- marks whose use by third parties for their own purposes would in- Release date 08.2010 fringe the rights of the owner.
Page 3: Functions
Council Directive 2004/108/EC) and concerning electrical equipment for use within specified voltage limits (Low-voltage Directive 2006/95 EC). This conformity is proved by tests conducted by Siemens AG in accordance with the Council Directive in agreement with the generic standards EN 61000-6-2 and EN 61000-6-4 for EMC directive, and with the standard EN 60255-27 for the low-voltage directive.
Page 4 Additional Support Should further information on the System SIPROTEC 4 be desired or should particular problems arise which are not covered sufficiently for the purchaser's purpose, the matter should be referred to the local Siemens rep- resentative. Our Customer Support Center provides a 24-hour service.
Page 5 Preface Safety Information This manual does not constitute a complete index of all required safety measures for operation of the equip- ment (module, device), as special operational conditions may require additional measures. However, it com- prises important information that should be noted for purposes of personal safety as well as avoiding material damage.
Page 6 The operational equipment (device, module) may only be used for such applications as set out in the catalogue and the technical description, and only in combination with third-party equipment recommended or approved by Siemens. The successful and safe operation of the device is dependent on proper handling, storage, installation, opera- tion, and maintenance.
Page 7 Preface Typographic and Symbol Conventions The following text formats are used when literal information from the device or to the device appear in the text flow: Parameter Names Designators of configuration or function parameters which may appear word-for-word in the display of the device or on the screen of a personal computer (with operation software DIGSI), are marked in bold letters in monospace type style.
Page 8 Preface Besides these, graphical symbols are used in accordance with IEC 60617-12 and IEC 60617-13 or similar. Some of the most frequently used are listed below: Input signal of analog quantity AND-gate operation of input values OR-gate operation of input values Exklusive OR-gate (antivalence): output is active, if only one of the inputs is active Coincidence gate (equivalence): output is active, if both inputs are...
Page 9: Table Of Contents
Contents Introduction................17 Overall Operation.
Page 10 Contents Overcurrent Protection 50, 51, 50N, 51N ..........55 2.2.1 General .
Page 11 Contents Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) ..120 2.7.1 Motor Starting Protection 48............120 2.7.1.1 Description .
Page 12 Contents 2.12 Breaker Failure Protection 50BF........... . . 200 2.12.1 Description .
Page 13 Contents 2.18 Auxiliary Functions..............242 2.18.1 Message Processing .
Page 14 Contents 2.20 Notes on Device Operation ............282 2.20.1 Different operation .
Page 15 Contents Technical Data................333 General Device Data .
Page 16 Contents Terminal Assignments ............. 405 A.2.1 7SK80 —...
Page 17: Introduction
Introduction This chapter introduces the SIPROTEC 4 7SK80 and gives an overview of the device's application, properties and functions. Overall Operation Application Scope Characteristics SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 18: Overall Operation
1.1 Overall Operation Overall Operation The digital SIPROTEC 7SK80 motor protection is equipped with a powerful microprocessor. It allows all tasks to be processed digitally, from the acquisition of measured quantities to sending commands to circuit breakers. Figure 1-1 shows the basic structure of the 7SK80.
Page 19 Introduction 1.1 Overall Operation The analog input quantities are passed on to the input amplifiers (IA). The input amplifier IA element provides a high-resistance termination for the input quantities. It consists of filters that are optimized for measured-value processing with regard to bandwidth and processing speed. The analog-to-digital (AD) transformer group consists of a an analog-to-digital converter and memory compo- nents for the transmission of data to the microcomputer.
Page 20 Introduction 1.1 Overall Operation Power Supply A power supply unit (Vaux or PS) delivers power to the functional units using the different voltage levels. Voltage dips may occur if the voltage supply system (substation battery) becomes short-circuited. Usually, they are bridged by a capacitor (see also Technical Data).
Page 21: Application Scope
Introduction 1.2 Application Scope Application Scope The digital motor protection SIPROTEC 4 7SK80 is suitable as protection and monitoring unit for asynchronous machines of any size. It can nevertheless also be used in busbar feeders or as line protection in networks with grounded, low-resistance grounded, isolated or compensated star point structure.
Page 22 Introduction 1.2 Application Scope Messages and Measured Values; Recording of Event and Fault Data The operational indications provide information about conditions in the power system and the device. Measure- ment quantities and values that are calculated can be displayed locally and communicated via the serial inter- faces.
Page 23: Characteristics
Introduction 1.3 Characteristics Characteristics General Characteristics • Powerful 32-bit microprocessor system. • Complete digital processing and control of measured values, from the sampling of the analog input quanti- ties to the initiation of outputs, for example, tripping or closing circuit breakers or other switchgear devices. •...
Page 24 Introduction 1.3 Characteristics Ground Fault Protection 50N, 51N • Three definite time overcurrent protective Elements and one inverse time overcurrent protective element ap- plicable for grounded or high-resistance grounded systems; • For inverse time overcurrent protection, selection from various characteristics of different standards. •...
Page 25 Introduction 1.3 Characteristics Frequency Protection 81 O/U • Monitoring on underfrequency (f<) and/or overfrequency (f>) with 4 frequency limits and delay times that are independently adjustable; • Insensitive to harmonics and abrupt phase angle changes; • Adjustable undervoltage threshold. Thermal Overload Protection 49 •...
Page 26 Introduction 1.3 Characteristics Breaker Failure Protection 50 BF • Checking current flow and/or evaluation of the circuit breaker auxiliary contacts; • Initiated by the tripping of any integrated protective element that trips the circuit breaker; • Initiation possible via a binary input from an external protective device. Flexible Protective Functions •...
Page 27: Functions
Functions This chapter describes the numerous functions available on the SIPROTEC 4 device 7SK80. It shows the setting possibilities for each function in maximum configuration. Information with regard to the determination of setting values as well as formulas, if required, are also provided. Based on the following information, it can also be determined which of the provided functions should be used.
Page 28: General
Functions 2.1 General General The settings associated with the various device functions may be modified using the operating or service inter- face in DIGSI in conjunction with a personal computer. Some parameters may also be changed using the con- trols on the front panel of the device. The procedure is set out in detail in the SIPROTEC System Description /1/. 2.1.1 Functional Scope The 7SK80 relay comprises protection functions and additional functions.
Page 29 Functions 2.1 General Special Features Most settings are self-explaining. The special cases are described in the following. If you want to use the setting group change function, set address 103 Grp Chge OPTION to Enabled. In this case, you can select up to four different groups of function parameters between which you can switch quickly and conveniently during operation.
Page 30: Settings
Functions 2.1 General In address 192 Cap. Volt.Meas. you can specify whether you want to employ capacitive voltage measure- ment. When selecting YES, you have to specify the bushing capacitance, the line and stray capacitance for the capacitive voltage dividers at the voltage inputs in addresses 241 to 246 (see 2.1.3.2). With capacitive voltage measurement several functions are not available or only partly.
Page 31 Functions 2.1 General Addr. Parameter Setting Options Default Setting Comments Disabled No ambient temp 49 Thermal Overload Protection No ambient temp With amb. temp. 66 #of Starts Disabled Enabled 66 Startup Counter for Motors Enabled Load Jam Prot. Disabled Enabled Load Jam Protection Enabled 27/59...
Page 32: Device, General Settings
Functions 2.1 General 2.1.2 Device, General Settings The device requires some general information. This may be, for example, the type of annunciation to be issued in the event of an occurrence of a power system fault. 2.1.2.1 Description Command-dependent Messages "No Trip – No Flag" The indication of messages masked to local LEDs and the generation of additional messages can be made dependent on whether the device has issued a trip signal.
Page 33: Settings
Functions 2.1 General Selection of Default Display The start page of the default display appearing after startup of the device can be selected in the device data via parameter 640 Start image DD. The pages available for each device version are listed in the Appendix A.5.
Page 34: Power System Data 1
Functions 2.1 General Information Type of In- Comments formation Level-2 change Level-2 change Local change Local setting change Event Lost OUT_Ev Event lost Flag Lost Flag Lost Chatter ON Chatter ON Error Sum Alarm Error with a summary alarm Alarm Sum Event Alarm Summary Event Fail Battery Failure: Battery empty...
Page 35 Functions 2.1 General In DIGSI double-click Settings to open the corresponding dialog box. In doing so, a dialog box with tabs will open under P.System Data 1 where individual parameters can be configured. The following descriptions are therefore structured according to these tabs. Nominal Frequency (Power System) The nominal frequency of the system is set under the Address 214 Rated Frequency.
Page 36 Functions 2.1 General Current Connection (Power System Data) Via parameter 251 CT Connect. a special connection of the current transformers can be determined. The standard connection is A, B, C, (Gnd). It may only be changed if the device is set to measure one or more ground currents via two current inputs.
Page 37 Functions 2.1 General The following table gives an overview of how the protection functions are assigned to the ground current inputs for the special connection. Function Current input 2 Current input 4 Time overcurrent protection ground 50N/51N (Section 2.2) Directional time overcurrent protection ground 67N (Section 2.3).
Page 38 Functions 2.1 General The table gives an overview of the functions that can be activated for the corresponding connection type (de- pends also on the ordering number). The functions which are not shown are available for all connection types. Connection type Functions Directional overcurrent protection Sensitive ground fault detection 50Ns,...
Page 39 Functions 2.1 General The voltage inputs of the device feature an input capacitance of 2.2nF and an ohmic component of 2.0 MΩ. Two capacitance values must be configured for each of the three voltage inputs when using capacitive voltage measurement. •...
Page 40 Functions 2.1 General Figure 2-5 Capacitive voltage measurement The device can fully function only if the secondary voltage that results from the nominal voltage on the primary side lies within a certain range. If the primary nominal voltage at the voltage inputs causes a too small or too high voltage, the function of the device will be blocked.
Page 41 Functions 2.1 General The setting of parameter 203 Vnom SECONDARY should be roughly equivalent to the voltage at the terminals of the protection device at primary nominal voltage. If capacitive voltage measurement is selected, a setting range of 34 V to 140 V is sufficient for this parameter. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 42 Functions 2.1 General Optimizing the Configured Capacitance Values In many cases the exact values for the bushing capacitance and for the line and stray capacitance will be un- known. Besides that the capacitance of the voltage inputs has a tolerance of ±20 %. These uncertainties can cause amplitude and phase errors of the measured voltage.
Page 43 Functions 2.1 General Nominal Values of Current Transformers (CTs) At addresses 204 CT PRIMARY and 205 CT SECONDARY information is entered regarding the primary and secondary ampere ratings of the current transformers. It is important to ensure that the rated secondary current of the current transformer matches the rated current of the device, otherwise the device will calculate incorrect primary data.
Page 44 Functions 2.1 General Trip and close command duration (Breaker) In address 210 the minimum trip command duration TMin TRIP CMD can be set. This setting applies to all protection functions that can initiate tripping. Current Flow Monitoring (Breaker) In address 212 BkrClosed I MIN the pickup threshold of the integrated current flow monitoring function can be set.
Page 45: Settings
Functions 2.1 General Voltage Protection (Protection Operating Quantities) In a three-phase connection, the fundamental harmonic of the largest of the three phase-to-phase voltages (Vphph) or phase-Ground voltages (Vph-n) or the positive sequence voltage (V1) or the negative sequence voltage (V2) is supplied to the overvoltage protection elements. In three-phase connection, undervoltage pro- tection relies either on the positive sequence voltage (V1) or the smallest of the phase-to-phase voltages (Vphph) or the phase-to-Ground voltages (Vph-n).
Page 46 Functions 2.1 General Addr. Parameter Setting Options Default Setting Comments Threshold BI 3 Thresh. BI 176V Thresh. BI 176V Threshold for Binary Input 3 Thresh. BI 88V Thresh. BI 19V Threshold BI 4 Thresh. BI 176V Thresh. BI 176V Threshold for Binary Input 4 Thresh.
Page 47: Information List
Functions 2.1 General Addr. Parameter Setting Options Default Setting Comments OP.CYCLES Isc 1 .. 1000 Switch. Cycles at Rated Short-Cir. Curr. Ix EXPONENT 1.0 .. 3.0 Exponent for the Ix-Method Cmd.via control (Setting options depend None 52 B.Wear: Open Cmd. via on configuration) Control Device T 52 BREAKTIME...
Page 48: Oscillographic Fault Records
Functions 2.1 General 2.1.4 Oscillographic Fault Records The Multifunctional Protection with Control 7SK80 is equipped with a fault record memory. The instantaneous values of the measured values and v (voltages depend on the connection) are sampled at intervals of 1.0 ms (at 50 Hz) and stored in a revolving buffer (20 sampling values per cycle).
Page 49: Setting Notes
Functions 2.1 General 2.1.4.2 Setting Notes Specifications Fault recording (waveform capture) will only take place if address 104 OSC. FAULT REC. is set to Enabled. Other settings pertaining to fault recording (waveform capture) are found in the Osc. Fault Rec. OSC. FAULT REC.
Page 50: Settings Groups
Functions 2.1 General 2.1.5 Settings Groups Up to four different setting groups can be created for establishing the device's function settings. 2.1.5.1 Description Changing Setting Groups During operation the user can switch back and forth setting groups locally, via the operator panel, binary inputs (if so configured), the service interface using a personal computer, or via the system interface.
Page 51: Information List
Functions 2.1 General 2.1.5.4 Information List Information Type of In- Comments formation P-GrpA act IntSP Setting Group A is active P-GrpB act IntSP Setting Group B is active P-GrpC act IntSP Setting Group C is active P-GrpD act IntSP Setting Group D is active >Set Group Bit0 >Setting Group Select Bit 0 >Set Group Bit1...
Page 52: Settings
Functions 2.1 General Inversion of Measured Power Values / Metered Values The directional values (power, power factor, work and related min., max., mean and setpoint values), calculated in the operational measured values, are usually defined a positive in the direction of the protected object. This requires that the connection polarity for the entire device was configured accordingly in the P.System Data 1 (compare also "Polarity of the Current Transformers", address 201).
Page 53: En100-Module
Functions 2.1 General 2.1.7 EN100-Module 2.1.7.1 Functional Description The EN100-Module enables integration of the 7SK80 in 100-Mbit communication networks in control and au- tomation systems with the protocols according to IEC 61850 standard. This standard permits uniform commu- nication of the devices without gateways and protocol converters. Even when installed in heterogeneous envi- ronments, SIPROTEC 4 relays therefore provide for open and interoperable operation.
Page 54: Overcurrent Protection 50, 51, 50N, 51N
Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Overcurrent Protection 50, 51, 50N, 51N The overcurrent protection is provided with a total of four elements each for the phase currents and the ground current. All elements are independent from each other and can be combined as desired. If it is desired in isolated or resonant-grounded systems that three-phase devices should work together with two-phase protection equipment, the overcurrent protection can be configured in such a way that it allows two- phase operation besides the three-phase mode (see Chapter 2.1.3.2).
Page 55: Definite Time High-Set Elements 50-3, 50-2, 50N-3, 50N-2
Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N The following table gives an overview of the interconnection to other functions of 7SK80. Table 2-2 Interconnection to other functions Overcurrent protection elements Manual CLOSE Dynamic cold load pickup Inrush restraint function 50-1 •...
Page 56 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Figure 2-6 Logic diagram for 50-2 for phases If parameter 1213 MANUAL CLOSE is set to 50-2 instant. or 50-3 instant. and manual close detection is used, a pickup causes instantaneous tripping even if the Element is blocked via a binary input. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 57 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Figure 2-7 Logic diagram of the 50N-2 element If parameter 1313 MANUAL CLOSE is set to 50N-2 instant. or 50N-3 instant. and manual close de- tection is used, a pickup causes instantaneous tripping even if the Element is blocked via a binary input. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 58: Definite Time Overcurrent Elements 50-1, 50N-1
Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N 2.2.3 Definite Time Overcurrent Elements 50-1, 50N-1 For each Element an individual pickup value 50-1 PICKUP or 50N-1 PICKUP is set. Apart from Fundamental, the True RMS can also be measured. Each phase and ground current is compared separately with the setting value 50-1 or 50N-1 for each Element.
Page 59 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Figure 2-8 Logic diagram of the 50-1 element for phases If parameter 1213 MANUAL CLOSE is set to 50 -1 instant. and manual close detection is used, a pickup causes instantaneous tripping even if theElement is blocked via a binary input. The dropout delay only operates if no inrush was detected.
Page 60 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Figure 2-10 Logic diagram of the 50N-1 element If parameter 1313 MANUAL CLOSE is set to 50N-1 instant. and manual close detection is used, a pickup causes instantaneous tripping even if theElement is blocked via a binary input. The pickup values of each 50-1, 50-2 Element for the phase currents and 50N-1, 50N-2 Element for the ground current and the valid delay times for each element can be set individually.
Page 61: Inverse Time Overcurrent Elements 51, 51N
Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N 2.2.4 Inverse Time Overcurrent Elements 51, 51N Inverse time overcurrent elements are dependent on the ordering version. They always operate with an inverse time Curve in accordance with IEC or ANSI standards. The characteristics and associated formulas are given in the Technical Data.
Page 62 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Figure 2-12 Logic diagram of the 51 inverse-time overcurrent element for phases If an ANSI Curve is configured, parameter 1209 51 TIME DIAL is used instead of parameter 1208 51 TIME DIAL. If parameter 1213 MANUAL CLOSE is set to 51 instant.
Page 63 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Figure 2-13 Logic diagram of the 51N ground overcurrent relay element If an ANSI Curve is configured, parameter 1309 51N TIME DIAL is used instead of parameter 1308 51N TIME DIAL. If parameter 1313 MANUAL CLOSE is set to 51N instant. and manual close detection is used, a pickup causes instantaneous tripping even if theElement is blocked via a binary input.
Page 64: Dynamic Cold Load Pickup Function
Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N 2.2.5 Dynamic Cold Load Pickup Function It may be necessary to dynamically increase the pickup values if, during starting, certain elements of the system show an increased power consumption after a long period of zero voltage (e.g. air-conditioning systems, heating installations, motors).
Page 65 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Cross Blocking Since inrush restraint operates individually for each phase, protection is ideal where a power transformer is en- ergized into a single-phase fault and inrush currents are detected on a different healthy phase. However, the protection feature can be configured to allow that not only this phase element but also the remaining elements (including ground) are blocked (the so-called CROSS BLOCK function, address 2203) if the permissible har- monic component of the current is exceeded for only one phase.
Page 66 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Figure 2-14 Logic diagram for inrush restraint SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 67: Pickup Logic And Tripping Logic
Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N 2.2.7 Pickup Logic and Tripping Logic The pickup annunciations of the individual phases (or Ground) and the individual elements are combined with each other in such a way that the phase information and the Element that has picked up are issued. Table 2-3 Pickup annunciations of the overcurrent protection Internal Annunciation...
Page 68: Two-Phase Overcurrent Protection (Only Non-Directional)
Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N 2.2.8 Two-phase Overcurrent Protection (Only Non-directional) The two-phase overcurrent protection functionality is used in grounded or compensated systems where inter- action with existing two-phase protection equipment is required. As an isolated or resonant-grounded system remains operational with a single-phase ground fault, this protection serves the purpose of detecting double phase-to-ground faults with high ground fault currents and trip the respective feeder.
Page 69: Setting Notes
Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Figure 2-15 Reverse interlocking protection scheme 2.2.10 Setting Notes General When selecting the time overcurrent protection in DIGSI, a dialog box appears with several tabs for setting the individual parameters. Depending on the functional scope specified during configuration of the protective func- tions under addresses 112 Charac.
Page 70 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Measurement Methods The comparison values to be used for the respective element can be set in the setting sheets for the elements. • Measurement of the fundamental harmonic (standard method): This measurement method processes the sampled values of the current and filters in numerical order the fundamental harmonic so that the higher harmonics or transient peak currents remain largely unconsidered.
Page 71 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N The nominal current of the transformer is: = 84 A (High Voltage Side) = 462 A (Low Voltage NomT, 110 NomT, 20 Side) Current Transformer (High Voltage Side) 100 A / 1 A Current Transformer (Low Voltage Side) 500 A / 1 A Due to the following definition...
Page 72 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N 50-1 Element (phases) For setting the 50-1 element, it is the maximum anticipated load current that must be considered above all. Pickup due to overload should never occur since in this mode the device operates as fault protection with cor- respondingly short tripping times and not as overload protection.
Page 73 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N The corresponding time multiplier for an IEC Curve is set at address 1208 51 TIME DIAL and in address 1209 51 TIME DIAL for an ANSI Curve. It must be coordinated with the time coordination chart of the system. The time multiplier can also be set to ∞.
Page 74: Settings
Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Manual Close Mode (phases,Ground) When a circuit breaker is closed onto a faulted line, a high-speed trip by the circuit breaker is usually desired. For overcurrent or high-set Element the delay may be bypassed via a Manual Close pulse, thus resulting in instantaneous tripping.
Page 75 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Addr. Parameter Setting Options Default Setting Comments 1209 51 TIME DIAL 0.50 .. 15.00 ; ∞ 5.00 51 Time Dial 1210 51 Drop-out Instantaneous Disk Emulation Drop-out characteristic Disk Emulation 1211 51 IEC CURVE Normal Inverse Normal Inverse IEC Curve...
Page 76 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Addr. Parameter Setting Options Default Setting Comments 1309 51N TIME DIAL 0.50 .. 15.00 ; ∞ 5.00 51N Time Dial 1310 51N Drop-out Instantaneous Disk Emulation Drop-Out Characteristic Disk Emulation 1311 51N IEC CURVE Normal Inverse Normal Inverse IEC Curve...
Page 77: Information List
Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N 2.2.12 Information List Information Type of In- Comments formation 1704 >BLK 50/51 >BLOCK 50/51 1714 >BLK 50N/51N >BLOCK 50N/51N 1718 >BLOCK 50-3 >BLOCK 50-3 1719 >BLOCK 50N-3 >BLOCK 50N-3 1721 >BLOCK 50-2 >BLOCK 50-2 1722 >BLOCK 50-1...
Page 78 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Information Type of In- Comments formation 1838 51N TimeOut 51N Time Out 1839 51N TRIP 51N TRIP 1840 PhA InrushDet Phase A inrush detection 1841 PhB InrushDet Phase B inrush detection 1842 PhC InrushDet Phase C inrush detection 1843...
Page 79: Directional Ground Overcurrent Protection 67N
Functions 2.3 Directional Gound Overcurrent Protection 67N Directional Gound Overcurrent Protection 67N The directional ground overcurrent protection comprises three elements for the ground current. All elements are independent of each other and can be combined as desired. The high-current element 67N-2 and the overcurrent element 67N-1 always operate with definite tripping time, the third element 67N-TOC always operates with inverse tripping time.
Page 80: Definite Time, Directional High-Set Current Element 67N-2
Functions 2.3 Directional Gound Overcurrent Protection 67N 2.3.2 Definite Time, Directional High-set Element 67N-2 Each ground current is compared with the pickup value 67N-2 PICKUP. Currents above the setting values are recognized searately when fault direction is equal to the configured direction. After the corresponding delay time 67N-2 DELAY has expired, the trip command is issued.
Page 81: Definite Time, Directional Overcurrent Element 67N-1
Functions 2.3 Directional Gound Overcurrent Protection 67N If parameter 1613 is set to 67N-2 instant. and manual close detection applies, the trip is initiated as soon as the pickup conditions arrive, even if the element is blocked via a binary input. 2.3.3 Definite Time, Directional Overcurrent Element 67N-1 The ground current is compared with the setting value 67N-1 PICKUP.
Page 82 Functions 2.3 Directional Gound Overcurrent Protection 67N Figure 2-18 Logic diagram of the directional overcurrent element 67N-1 If parameter 1613 is set to 67N-1 instant. and manual close detection applies, the trip is initiated as soon as the pickup conditions arrive, even if the element is blocked via a binary input. The dropout delay only functions if no inrush was detected.
Page 83: Inverse Time, Directional Overcurrent Element 67N-Toc
Functions 2.3 Directional Gound Overcurrent Protection 67N Figure 2-19 Logic diagram of the dropout delay for 67N-1 2.3.4 Inverse Time, Directional Overcurrent Element 67N-TOC The inverse time elements are dependent on the device ordering version. They operate either according to IEC or ANSI-standard.
Page 84 Functions 2.3 Directional Gound Overcurrent Protection 67N Figure 2-20 Logic diagram of the directional inverse-time overcurrent element 67N-TOC SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 85: Interaction With Fuse Failure Monitor (Ffm)
Functions 2.3 Directional Gound Overcurrent Protection 67N 2.3.5 Interaction with Fuse Failure Monitor (FFM) Spurious tripping can be caused by a measuring voltage failure due to a short circuit or phase failure in the voltage transformer secondary system or pickup of the voltage transformer mcb (fuse). In the event of a single- phase or two-phase failure of the measuring voltage, it is possible to recognize this condition and block the di- rectional overcurrent time protection elements (ground), see logic diagrams.
Page 86: Determination Of Direction
Functions 2.3 Directional Gound Overcurrent Protection 67N 2.3.8 Determination of Direction Basically, the direction determination is performed by determining the phase angle between the fault current and a reference voltage. Method of Directional Measurement For the directional ground fault element there are two ways of direction determination: •...
Page 87 Functions 2.3 Directional Gound Overcurrent Protection 67N Table 2-5 Measured values for determining the fault direction Pickup Current Voltage A, N B, N C, N A. B, N B, C, N A, C, N A, B, C, N or 3 · V = |VA + VB + VC|, depending on type of connection for the voltages Direction Determination via Ground Element using Ground Values Figure 2-21 shows the treatment of the reference voltage for the directional ground element, also based on a...
Page 88: Setting Notes
Functions 2.3 Directional Gound Overcurrent Protection 67N Direction Determination via Ground Element using Negative Sequence Values Figure 2-22 shows how the reference voltage for the directional ground element is processed using the nega- tive sequence values based on a single-phase ground fault in phase A. The negative sequence voltage is used as reference voltage;...
Page 89 Functions 2.3 Directional Gound Overcurrent Protection 67N Measurement methods In the tabs for each element you can specify the references values used by the corresponding element. • Measurement of the fundamental harmonic (standard method): This measurement method processes the sampled values of the current and filters in numerical order the fundamental harmonic so that the higher harmonics or transient peak currents are rejected.
Page 90 Functions 2.3 Directional Gound Overcurrent Protection 67N Note If parameter 213 VT Connect. 3ph is set to Vab, Vbc or Vab, Vbc, Vx, the direction is always determined using the negative sequence values V2/I2. For these voltage connection types the zero sequence voltage VN or 3V0) is not available.
Page 91 Functions 2.3 Directional Gound Overcurrent Protection 67N The current value is set at address 1607 67N-TOC PICKUP. The most relevant for this setting is the minimum appearing ground fault current. The corresponding element time multiplication factor for an IEC Curve is set at address 1608 67N-TOC T- DIAL and in address 1609 67N-TOC T-DIAL for an ANSI Curve.
Page 92: Settings
Functions 2.3 Directional Gound Overcurrent Protection 67N 2.3.10 Settings Addresses which have an appended "A" can only be changed with DIGSI, under "Display Additional Settings". The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec- ondary nominal current of the current transformer. Addr.
Page 93: Information List
Functions 2.3 Directional Gound Overcurrent Protection 67N Addr. Parameter Setting Options Default Setting Comments 1621A 67N-1 MEASUREM. Fundamental Fundamental 67N-1 measurement of True RMS 1622A 67N-TOC MEASUR. Fundamental Fundamental 67N-TOC measurement of True RMS 2.3.11 Information List Information Type of In- Comments formation 2614...
Page 94: Dynamic Cold Load Pickup
Functions 2.4 Dynamic Cold Load Pickup Dynamic Cold Load Pickup With the cold load pickup function, pickup and delay settings of directional and non-directional time overcurrent protection can be changed over dynamically. Applications • It may be necessary to dynamically increase the pickup values if, during starting and for a short time there- after, certain elements of the system have an increased power consumption after a long period of zero voltage (e.g.
Page 95 Functions 2.4 Dynamic Cold Load Pickup If the binary input „>BLOCK CLP“ is enabled, all triggered timers are reset and, as a consequence, all "normal" settings are immediately restored. If blocking occurs during an on-going fault with dynamic cold load pickup functions enabled, the timers of all non-directional overcurrent relay elements are stopped and may then be restarted based on their normal duration.
Page 96 Functions 2.4 Dynamic Cold Load Pickup Figure 2-25 Logic diagram of the dynamic cold load pickup function (50c, 50Nc, 51c, 51Nc, 67c, 67Nc) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 97: Setting Notes
Functions 2.4 Dynamic Cold Load Pickup 2.4.2 Setting Notes General The dynamic cold load pickup function can only be enabled if address 117 Coldload Pickup was set to Enabled during configuration of the protective functions. If not required, this function should be set to Disabled.
Page 98: Settings
Functions 2.4 Dynamic Cold Load Pickup 2.4.3 Settings The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec- ondary nominal current of the current transformer. Addr. Parameter Setting Options Default Setting Comments 1701 COLDLOAD PICKUP Cold-Load-Pickup Func- tion 1702 Start Condition...
Page 99: Information List
Functions 2.4 Dynamic Cold Load Pickup Addr. Parameter Setting Options Default Setting Comments 2103 67Nc-1 PICKUP 0.05 .. 35.00 A; ∞ 1.50 A 67Nc-1 Pickup 0.25 .. 175.00 A; ∞ 7.50 A 2104 67Nc-1 DELAY 0.00 .. 60.00 sec; ∞ 0.30 sec 67Nc-1 Time Delay 2105...
Page 100: Voltage Protection 27, 59
Functions 2.5 Voltage Protection 27, 59 Voltage Protection 27, 59 Voltage protection has the task to protect electrical equipment against undervoltage and overvoltage. Both op- erational states are abnormal as overvoltage may cause for example insulation problems or undervoltage may cause stability problems.
Page 101 Functions 2.5 Voltage Protection 27, 59 The positive and negative sequence voltages stated in the table are calculated from the phase-to-Ground volt- ages. Note For capacitive voltage connections, the same values as with the connection type Van, Vbn, Vcn are used. Current Criterion Depending on the system, the primary voltage transformers are arranged either on the supply side or the load side of the associated circuit breaker.
Page 102: Overvoltage Protection 59
Functions 2.5 Voltage Protection 27, 59 2.5.2 Overvoltage Protection 59 Function The overvoltage protection has two elements. In case of a high overvoltage, tripping switchoff is performed with a short-time delay, whereas in case of less severe overvoltages, the tripping is performed with a longer time delay.
Page 103: Undervoltage Protection 27
Functions 2.5 Voltage Protection 27, 59 2.5.3 Undervoltage Protection 27 Function Undervoltage protection consists of two definite time elements (27-1 PICKUP and 27-2 PICKUP). Therefore, tripping can be time-coordinated depending on how severe voltage collapses are. Voltage thresholds and time delays can be set individually for both elements.
Page 104 Functions 2.5 Voltage Protection 27, 59 Figure 2-28 Typical fault profile for load side connection of the voltage transformers (with current supervi- sion) Upon the closing of the circuit breaker, current criterion is delayed for a short period of time. If the voltage cri- terion drops out during this time period (about 60 ms), the protection function does not pick up.
Page 105 Functions 2.5 Voltage Protection 27, 59 Figure 2-29 Logic diagram of the undervoltage protection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 106: Setting Notes
Functions 2.5 Voltage Protection 27, 59 2.5.4 Setting Notes General Voltage protection is only effective and accessible if address 150 27/59 is set to Enabled during configuration of protection functions. If this function is not required, then Disabled is set. The voltage to be evaluated is selected in Power System Data 1 (see Chapter 2.5, Table 2-6).
Page 107 Functions 2.5 Voltage Protection 27, 59 Overvoltage protection comprises two elements. Thus, with configuration of the negative system, a longer time delay (address 5004, 59-1 DELAY) may be assigned to the lower Element (address 5015, 59-1 PICKUP V2 and a shorter time delay (address 5007, 59-2 DELAY) may be assigned to the upper Element (address 5016, 59-2 PICKUP V2).
Page 108 Functions 2.5 Voltage Protection 27, 59 The time settings should be selected such that tripping occurs in response to voltage dips that lead to unstable operating conditions. On the other hand, the time delay should be long enough to avoid tripping on short-term voltage dips.
Page 109: Settings
Functions 2.5 Voltage Protection 27, 59 2.5.5 Settings Addresses which have an appended "A" can only be changed with DIGSI, under "Display Additional Settings". Addr. Parameter Setting Options Default Setting Comments 5001 FCT 59 59 Overvoltage Protection Alarm Only 5002 59-1 PICKUP 20 ..
Page 110: Information List
Functions 2.5 Voltage Protection 27, 59 2.5.6 Information List Information Type of In- Comments formation 234.2100 27, 59 blk IntSP 27, 59 blocked via operation 6503 >BLOCK 27 >BLOCK 27 undervoltage protection 6505 >27 I SUPRVSN >27-Switch current supervision ON 6506 >BLOCK 27-1 >BLOCK 27-1 Undervoltage protection...
Page 111: Negative Sequence Protection 46
Functions 2.6 Negative Sequence Protection 46 Negative Sequence Protection 46 Negative sequence protection detects unbalanced loads on the system. Applications • The application of unbalanced load protection to motors has a special significance. Unbalanced loads create counter-rotating fields in three-phase induction motors, which act on the rotor at double frequency. Eddy cur- rents are induced at the rotor surface, and local overheating in rotor end zones and the slot wedge begins to take place.
Page 112 Functions 2.6 Negative Sequence Protection 46 Settable Dropout Times Pickup stabilization for the definite-time tripping characteristic 46-1, 46-2 can be accomplished by means of set- table dropout times. This facility is used in power systems with possible intermittent faults. Used together with electromechanical relays, it allows different dropout responses to be adjusted and a time grading of numerical and electromechanical relays to be implemented.
Page 113 Functions 2.6 Negative Sequence Protection 46 Dropout for ANSI Curves When using an ANSI curve it can be selected whether the dropout of the element is to occur instantaneously or whether dropout is to be performed by means of the disk emulation mechanism. „Instantaneous“ means that the drop out will occur when a 95 % of the pickup value is reached.
Page 114 Functions 2.6 Negative Sequence Protection 46 Figure 2-32 Logic diagram of the unbalanced load protection The pickup of the definite time overcurrent protection can be stabilized by the configured dropout time 4012 46 T DROP-OUT. This time is started and maintains the pickup condition if the current falls below the threshold. Therefore, the function does not drop out at high speed.
Page 115: Setting Notes
Functions 2.6 Negative Sequence Protection 46 2.6.3 Setting Notes General The function type has been specified during configuration of the protection functions (see Section 2.1.1.2, address 140, 46). If only the definite time elements are desired, the address 46 should be set to Definite Time.
Page 116 Functions 2.6 Negative Sequence Protection 46 Examples: Motor with the following data: Nominal current = 545 A Nom Motor Continuously permissible negative = 0.11 continuous 2 dd prim Nom Motor sequence current Briefly permissible negative se- = 0.55 for T max = 1 s 2 long-term prim Nom Motor quence current...
Page 117 Functions 2.6 Negative Sequence Protection 46 The following fault currents may be detected at the low side: If 46-1 PICKUP on the high side of the devices is set to = 0.1, then a fault current of I = 3 · TR ·...
Page 118: Settings
Functions 2.6 Negative Sequence Protection 46 2.6.4 Settings Addresses which have an appended "A" can only be changed with DIGSI, under "Display Additional Settings". The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec- ondary nominal current of the current transformer. Addr.
Page 119: Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection)
Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) For the protection of motors, the 7SK80 can be provided with a motor starting protection feature, a restart inhibit and a load jam protection function.
Page 120 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Inverse Time Overcurrent Element The inverse time overcurrent element is designed to operate only when the rotor is not blocked. With a de- creased startup current resulting from voltage dips when starting the motor, prolonged startup times are eval- uated correctly and tripping with an appropriate time is enabled.
Page 121 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Definite Time Overcurrent Tripping Characteristic (Locked Rotor Time) Tripping must be executed when the actual motor starting time exceeds the maximum allowable locked rotor time if the rotor is locked. The device can be informed about the locked rotor condition via the binary input („>48 Rot.
Page 122: Setting Notes
Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Switching of Startup Times The motor manufacturer provides startup time curves for both cold and warm motor conditions (see Figure 2- 33). The function Motor Starting Protection automatically performs a switching. The "warm motor" condition is derived from the thermal storage of the restart inhibit (see Section 2.7.2).
Page 123 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) The setting for address STARTUP CURRENT (I ) as a secondary value is calculated as follows: STARTUP For reduced voltage, the startup current is also reduced almost linearly. At 80 % nominal voltage, the startup current in this example is reduced to 0.8 ·...
Page 124 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Threshold Values "cold" / "warm" Motor Parameter 4106 TEMP.COLD MOTOR determines the threshold value. It is derived from the number of cold ) and warm (n ) motor startups.
Page 125: Motor Restart Inhibit 66
Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) 2.7.2 Motor Restart Inhibit 66 The motor restart inhibit prevents restarting of the motor when this restart may cause the permissible thermal limits of the rotor to be exceeded. Additionally, the function can trip directly if the rotor temperature exceeds the maximum admissible temperature (100%) (rotor overload).
Page 126 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Figure 2-35 Temperature curve at the rotor and in the thermal replica during repeated start-up attempts Although the heat distribution on the rotor bars may severely differ during motor starting, the different maximum temperatures in the the rotor are not pertinant for motor restart inhibit (see Figure 2-35).
Page 127 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Restart Threshold If the rotor temperature has exceeded the restart threshold, the motor cannot be restarted. The blocking signal is not lifted unless the rotor temperature has fallen below the restarting limit, that is, when exactly one start becomes possible without exceeding the excessive rotor temperature limit.
Page 128 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Total Time T Reclose The total waiting time T before the motor can be restarted is therefore composed of the equilibrium time Reclose and the time T calculated from the thermal replica, and the value that is needed to drop below the limit for Restart restarting.
Page 129 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Emergency Start If, for emergency reasons, motor starting that will exceed the maximum allowable rotor temperature must take place, the motor restart inhibit signal can be removed via a binary input („>66 emer.start“), thus allowing a new starting attempt.
Page 130 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Figure 2-36 Logic diagram for the restart inhibit SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 131: Setting Notes
Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) 2.7.2.2 Setting Notes General Restart inhibit is only effective and accessible if address 143 66 #of Starts is set to Enabled. If not re- quired, this function is set to Disabled. The function can be turned ON or OFF under address 4301 FCT 66.. Note When function settings of the motor restart inhibit are changed, the thermal replica of this function is reset.
Page 132 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Example: Motor with the following data: Rated Voltage = 6600 V Nominal current = 126 A Startup current = 624 A STARTUP Startup duration = 8.5 s Start max.
Page 133 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Temperature Behavior during Changing Operating States For a better understanding of the above considerations several possible operating ranges in two different op- erating areas will be discussed in the following paragraph. Settings indicated above are to be used prevaling 3 cold and 2 warm startup attempts have resulted in the restart limit reaching 66.7%.
Page 134 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) B) Above the thermal restarting limit: A startup brings the machine from load operation into a temperature range far above the thermal restarting limit and the machine is stopped. The minimum inhibit time and the equilibrium time are started and „66 TRIP“...
Page 135: Load Jam Protection
Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) 2.7.3 Load Jam Protection The load jam protection serves to protect the motor during sudden rotor blocking. Damage to drives, bearings and other mechanic motor components can be avoided or reduced by means of quick motor shutdown. The blocking results in a current jump in the phases.
Page 136 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Figure 2-40 Example of the time characteristic for mechanical rotor blocking Logic A continuous comparison of the motor current with the configured threshold values of the protection function takes place for the purpose of detecting a locked rotor.
Page 137: Setting Notes
Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Figure 2-41 Logic diagram of the load jam protection 2.7.3.2 Setting Notes Elements A warning and a tripping element can be configured. The threshold value of the tripping element 4402 Load Jam I>...
Page 138 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Motor Standstill and Motor Startup Due to the threshold setting below the motor startup current, the load jam protection during motor startup must be blocked. Via parameters 212 BkrClosed I MIN the open circuit breaker is detected during current-flow measurement (motor standstill).
Page 139: Motor (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection)
Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Example: Motor with the following data: Nominal voltage = 6600 V Nominal current = 126 A Long-term current rating = 135 A Startup duration = 8.5 s startmax.
Page 140 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Addr. Parameter Setting Options Default Setting Comments 4302 IStart/IMOTnom 1.10 .. 10.00 4.90 I Start / I Motor nominal 4303 T START MAX 1 .. 320 sec 10 sec Maximum Permissible Starting Time...
Page 141: Information List
Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) 2.7.4.2 Information List Information Type of In- Comments formation 4822 >BLOCK 66 >BLOCK 66 Motor Startup Counter 4823 >66 emer.start >66 Mot.St. Cnt: Emergency start 4824 66 OFF 66 Motor Startup Counter OFF...
Page 142: Frequency Protection 81 O/U
Functions 2.8 Frequency Protection 81 O/U Frequency Protection 81 O/U The frequency protection function detects abnormally high and low frequencies in the system or in electrical machines. If the frequency lies outside the allowable range, appropriate actions are initiated, such as load shedding or separating a generator from the system.
Page 143: Setting Notes
Functions 2.8 Frequency Protection 81 O/U Figure 2-43 Logic diagram of the frequency protection 2.8.2 Setting Notes General Frequency protection is only in effect and accessible if address 154 81 O/U is set to Enabled during config- uration of protective functions. If the fuction is not required Disabled is set. The function can be turned ON or OFF under address 5401 FCT 81 O/U.
Page 144: Settings
Functions 2.8 Frequency Protection 81 O/U Pickup Values The setting as overfrequency or underfrequency element does not depend on the parameter threshold values of the respective element. An element can also function, for example, as an overfrequency element if its thresh- old value is set below the nominal frequency and vice versa.
Page 145: Information List
Functions 2.8 Frequency Protection 81 O/U Addr. Parameter Setting Options Default Setting Comments 5407 81-2 PICKUP 50.00 .. 70.00 Hz 59.00 Hz 81-2 Pickup 5408 81-2 DELAY 0.00 .. 100.00 sec; ∞ 30.00 sec 81-2 Time Delay 5409 81-3 PICKUP 40.00 ..
Page 146: Thermal Overload Protection 49
Functions 2.9 Thermal Overload Protection 49 Thermal Overload Protection 49 The thermal overload protection is designed to prevent thermal overloads from damaging the protected equip- ment. The protection function represents a thermal replica of the equipment to be protected (overload protec- tion with memory capability).
Page 147 Functions 2.9 Thermal Overload Protection 49 When the calculated overtemperature reaches the first settable threshold 49 Θ ALARM, an alarm annunciation is issued, e.g. to allow time for the load reduction measures to take place. When the calculated overtempera- ture reaches the second threshold, the protected equipment may be disconnected from the system. The highest overtemperature calculated from the three phase currents is used as the criterion.
Page 148 Functions 2.9 Thermal Overload Protection 49 Blocking The thermal memory may be reset via a binary input („>RES 49 Image“) and the current-related overtem- perature value is thus reset to zero. The same is accomplished via the binary input („>BLOCK 49 O/L“); in this case the entire overload protection is blocked completely, including the current warning element.
Page 149 Functions 2.9 Thermal Overload Protection 49 Figure 2-44 Logic diagram of the overload protection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 150: Setting Notes
Functions 2.9 Thermal Overload Protection 49 2.9.2 Setting Notes General Overload protection is only effective and accessible if address 142 49 is set to No ambient temp or to With amb. temp.. If this function is not required, then Disabled is set. Transformers and cable are prone to damage by overloads that last for an extended period of time.
Page 151 Functions 2.9 Thermal Overload Protection 49 For the 49 K-FACTOR to be set in the device the following applies (address 4202) with Permissible thermal primary current of the motor max prim Nominal current of the protected object Nom Obj. Nominal primary CT current Nom CT prim Example: Motor and current transformer with the following data: Permissible Continuous Current...
Page 152 Functions 2.9 Thermal Overload Protection 49 Example: Cable and current transformer with the following data: Permissible Continuous Current I = 500 A at Θ = 40 °C Maximum Current for 1 s = 45 · I = 22.5 kA Current Transformer 600 A / 1 A Example: Cable and current transformer with the following data: Thus results:...
Page 153 Functions 2.9 Thermal Overload Protection 49 Ambient or Coolant Temperature The specifications made up to now are sufficient to model the overtemperature. The ambient or coolant tem- perature, however, can also be processed. This has to be communicated to the device as digitalized measured value via the interface.
Page 154 Functions 2.9 Thermal Overload Protection 49 Example: Machine: I = 483 A Nom Mach =1.15 I at Θ = 40 °C max Mach = 93 °C Temperature at I Θ Nom Mach Nom Mach = 600 s (thermal time constant of the machine) τ...
Page 155: Settings
Functions 2.9 Thermal Overload Protection 49 2.9.3 Settings Addresses which have an appended "A" can only be changed with DIGSI, under "Display Additional Settings". The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec- ondary nominal current of the current transformer. Addr.
Page 156: Monitoring Functions
Functions 2.10 Monitoring Functions 2.10 Monitoring Functions The device incorporates comprehensive monitoring functions which cover both hardware and software. The measured values too are continuously checked for plausibility so that the current and voltage transformer cir- cuits are largely included into the monitoring system. 2.10.1 Measurement Supervision 2.10.1.1 General...
Page 157 Functions 2.10 Monitoring Functions Measurement Value Acquisition – Currents The monitoring of the device-internal measured-value acquisition of the currents can be effected via the current sum monitoring. Up to four input currents are measured by the device. If the three phase currents and the ground current from the current transformer neutral point are connected with the device, the sum of the four digitized currents must be zero.
Page 158 Functions 2.10 Monitoring Functions Figure 2-46 Logic Diagram of the fast current sum monitoring Note If the current input IN is configured as a sensitive transformer or if the connection mode A,G2,C,G; G->B or A,G2,C,G; G2->B was set for the current transformers at parameter 251 CT Connect., current sum mon- itoring is not possible.
Page 159: Software Monitoring
Functions 2.10 Monitoring Functions 2.10.1.3 Software Monitoring Watchdog For continuous monitoring of the program sequences, a time monitor is provided in the hardware (hardware watchdog) that expires upon failure of the processor or an internal program, and causes a complete restart of the processor system.
Page 160 Functions 2.10 Monitoring Functions Figure 2-47 Current symmetry monitoring Voltage Symmetry During normal system operation, a certain symmetry among the voltages is to be assumed. Since the phase- to-phase voltages are insensitive to ground faults, the phase-to-phase voltages are used for the symmetry monitoring.
Page 161: Measuring Voltage Failure Detection
Functions 2.10 Monitoring Functions Phase Sequence of Voltage and Current To detect swapped phase connections in the voltage and current input circuits, the phase sequence of the phase-to-phase measured voltages and the phase currents are checked by monitoring the sequence of same polarity zero crossing of the voltages.
Page 162 Functions 2.10 Monitoring Functions Mode of Operation - Grounded System The device is informed of the application of the FFM in the grounded system via address 5301 FUSE FAIL MON. Solid grounded. Note On systems where ground fault current is very small or absent (e.g. ungrounded supply transformers), fuse failure monitoring must be disabled or set to Coil.gnd./isol..
Page 163 Functions 2.10 Monitoring Functions Figure 2-49 Logic diagram of the Fuse Failure Monitor for grounded networks Mode of Operation - Isolated System The FFM can also operate in isolated and compensated (resonant-grounded) systems where only low ground currents are to be expected. The device is informed of that via address 5301 FUSE FAIL MON.. The logic diagram on the mode of operation in an isolated system is illustrated in Figure 2-50.
Page 164 Functions 2.10 Monitoring Functions Figure 2-50 Logic diagram of the Fuse Failure Monitor for ungrounded networks SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 165 Functions 2.10 Monitoring Functions Single- and Two-phase Faults in Voltage Transformer Circuits The measuring voltage failure detection is based on the fact that a significant negative sequence system is formed in the voltage during single- or two-phase voltage failure, however without influencing the current. This enables a clear distinction from asymmetries impressed by the power system.
Page 166: Broken Wire Monitoring Of Voltage Transformer Circuits
Functions 2.10 Monitoring Functions 2.10.1.6 Broken Wire Monitoring of Voltage Transformer Circuits Requirements This function is only available in device version „World“ (Ordering Information Pos. 10 = B) since it is only used in certain regions. Furthermore, the measurement of all three phase-to-ground voltages (Van, Vbn, Vcn) is a requirement.
Page 167: Setting Notes
Functions 2.10 Monitoring Functions Figure 2-51 Logic diagram of broken wire monitoring 2.10.1.7 Setting Notes Measured Value Monitoring The sensitivity of measured value monitor can be modified. Default values which are sufficient in most cases are preset. If especially high operating asymmetries in the currents and/or voltages are to be expected during operation, or if it becomes apparent during operation that certain monitoring functions activate sporadically, then the setting should be less sensitive.
Page 168 Functions 2.10 Monitoring Functions Address 8106 Σ I THRESHOLD determines the limit current above which the current sum monitor is activated (absolute portion, only relative to I ). The relative portion (relative to the maximum conductor current) for ac- tivating the current sum monitor is set at address 8107 Σ I FACTOR. Note Current sum monitoring can operate properly only when the residual current of the protected line is fed to the ) of the relay (see Power System Data 1).
Page 169: Settings
Functions 2.10 Monitoring Functions 2.10.1.8 Settings The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec- ondary nominal current of the current transformer. Addr. Parameter Setting Options Default Setting Comments 5201 VT BROKEN WIRE VT broken wire supervi- sion 5202 Σ...
Page 170: Information List
Functions 2.10 Monitoring Functions 2.10.1.9 Information List Information Type of In- Comments formation Fail I Superv. Failure: General Current Supervision Failure Σ I Failure: Current Summation Fail I balance Failure: Current Balance Fail V balance Failure: Voltage Balance VT FuseFail>10s VT Fuse Failure (alarm >10s) VT FuseFail VT Fuse Failure (alarm instantaneous)
Page 171: Description
Functions 2.10 Monitoring Functions 2.10.2.1 Description Supervision with Two Binary Inputs When using two binary inputs, these are connected according to Figure 2-52, parallel to the associated trip contact on one side, and parallel to the circuit breaker auxiliary contacts on the other. Figure 2-52 Principle of the trip circuit supervision with two binary inputs Supervision with two binary inputs not only detects interruptions in the trip circuit and loss of control voltage, it...
Page 172 Functions 2.10 Monitoring Functions The conditions of the two binary inputs are checked periodically. A check takes place about every 600 ms. If three consecutive conditional checks detect an abnormality (after 1.8 s), an annunciation is reported (see Figure 2-53). The repeated measurements determine the delay of the alarm message and avoid that an alarm is output during short transition periods.
Page 173: Setting Notes
Functions 2.10 Monitoring Functions As the trip circuit supervision does not operate during system faults, the closed trip contact does not lead to a fault message. If, however, tripping contacts from other devices operate in parallel with the trip circuit, then the fault message must be delayed (see also Figure 2-55).
Page 174: Settings
Functions 2.10 Monitoring Functions Supervision with One Binary Input Note: When using only one binary input (BI) for the trip circuit monitor, malfunctions, such as interruption of the trip circuit or loss of battery voltage are detected in general, but trip circuit failures while a trip command is active cannot be detected.
Page 175 Functions 2.10 Monitoring Functions Table 2-8 Summary of the device's malfunction responses Monitoring Possible causes Malfunction re- Annunciation (No.) Output sponse Auxiliary voltage failure External Device shutdown All LEDs dark drops out (auxiliary voltage) Internal (converter) Buffer battery Internal Annunciation „Fail Battery“...
Page 176 Functions 2.10 Monitoring Functions Group Annunciations Certain annunciations of the monitoring functions are already combined to group annunciations. These group annunciations and their composition are stated in the Appendix A.10. In this context it must be noted that the annunciation 160 „Alarm Sum Event“ is only issued when the measured value monitoring functions (8101 MEASURE.
Page 177: Ground Fault Protection 64, 67N(S), 50N(S), 51N(S)
Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Depending on the variant, the fourth current input of the multi-functional protection relay 7SK80 is equipped either with a sensitive input transformer or a standard transformer for 1/5 A. In the first case, the protective function is designed for ground fault detection in isolated or compensated systems due to its high sensitivity.
Page 178 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) After the voltage element picks up due to detection of a displacement voltage, the grounded phase is identified, if possible. For this purpose, the individual phase-to-Ground voltages are measured or calculated, irrespective of the connection type of the voltage transformers.
Page 179 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Determination of Direction When determining the sensitive ground fault direction it is not the current value that is crucial, but the part of the current which is perpendicular to a settable directional characteristic (axis of symmetry). As a prerequisite for determining the direction, the displacement voltage V must be exceeded as well as a configurable current part influencing the direction (active or reactive component).
Page 180 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Figure 2-59 Directional characteristic for cos–ϕ–measurement Fault direction is calculated with the zero sequence values from the ground current 3I and displacement voltage V or 3 · V . With these quantities ground active power and ground reactive power is calculated. The calculation algorithm used filters the measured values so that it is highly accurate and insensitive to higher harmonics (particularly the 3rd and 5th harmonics –...
Page 181 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Logic The following figure illustrates the activation criteria of the sensitive ground fault protection. The operational mode of the ground fault detection can be set under address 3101. If set to ON, tripping is possible and a fault log is generated. If set to Alarm Only, tripping is not possible and only a ground fault log is generated.
Page 182 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Figure 2-61 Logic diagram of the V > element for cos-ϕ /sin-ϕ measurement SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 183 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Figure 2-62 Logic diagram of the I elements during cos ϕ/sin ϕ measurement SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 184: Ground Fault Detection For V0/I0-Φ Measurement
Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) 2.11.2 Ground Fault Detection for V0/I0-ϕ Measurement Voltage Element The voltage element relies on a pickup initiated by the displacement voltage V or 3 · V . Additionally, the faulty phase is determined. The displacement voltage V can be directly applied to the device, or the summation voltage 3 ·...
Page 185 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Current Elements There are two current elements available. Both elements operate directionally, whereby the tripping zones can be set individually for each element (see margin heading „Tripping Area“). In case of capacitive voltage measurement, the current elements operate non-directional only since an exact angle measurement is not ensured when using the voltage V Both elements are provided with a definite time characteristic.
Page 186 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Logic The following figure illustrates the activation criteria of the sensitive ground fault protection. The operational mode of the ground fault detection can be set under address 3101. If set to ON, tripping is possible and a fault log is generated. If set to ON with GF log, tripping is possible, a fault log and a ground fault log are generated.
Page 187 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Figure 2-66 Logic diagram during V0/I0 ϕ measurement, part 1 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 188 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Figure 2-67 Logic diagram for U0-/I0 -ϕ measurement, part 2 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 189: Ground Fault Location
Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) 2.11.3 Ground Fault Location Application Example Directional determination may often be used to locate ground faults. In radial systems, locating the ground fault is relatively simple. Since all feeders from a common bus (Figure 2-68) deliver a capacitive charging current, nearly the total ground fault current of the system is available at the measuring point of the faulty line in the ungrounded system.
Page 190: Setting Notes
Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) 2.11.4 Setting Notes General Settings During configuration of the protection function (Section 2.1.1, under address 131 Sens. Gnd Fault it was determined with which parameters the ground fault detection is functioning. If address Sens. Gnd Fault = Definite Time is selected, then the definite-time parameters are available.
Page 191 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) User-defined Curve (Inverse Time) User-defined characteristics are only used for the standard measurement method cos ϕ / sin ϕ (address 130 S.Gnd.F.Dir.Ch). During configuration of a user-defined Curve, it should be noted that there is a safety factor of approx.
Page 192 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Figure 2-70 Use of a user-defined Curve Determination of Ground-faulted Phase The phase connected to ground may be identified in an ungrounded or resonant grounded system, if the device is supplied by three voltage transformers connected in a grounded-wye configuration or the phase-Ground volt- ages are calculated.
Page 193 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Example: Parameter 202 Vnom PRIMARY = 12 kV Parameter 203 Vnom SECONDARY = 100 V Parameter 206 Vph / Vdelta = 1.73 Parameter 213 VT Connect. 3ph = Vab, Vbc, VGnd Parameter 3109 64-1 VGND = 40 V...
Page 194 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) If direction determination is used in conjunction with one of the current elements discussed above (50Ns-1 PICKUP, addresses 3117 ff, or 51Ns PICKUP, addresses 3119 ff), it is sensible to select a value for address RELEASE DIRECT.
Page 195 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Direction Determination for V0/I0 ϕ Measurement With the minimum voltage 50Ns-2 Vmin, address 3150 and the level of the pickup current 50Ns-2 PICKUP, address 3113, the lower limit of the circuit segment of element 50Ns-2 is set. The thresholds of the tripping range in respect of the displacement voltage is set by means of the matching phase angle 50Ns-2 Phi, address 3151 and angle 50Ns-2 DeltaPhi, address 3152.
Page 196: Settings
Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Grounded System In grounded systems, a value is set below the minimum anticipated ground fault current. It is important to note that 3I0 DIR (current value RELEASE DIRECT.) only detects the current components that are perpendicular to the directional limit lines defined at addresses 3124 and 3125.
Page 197 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Addr. Parameter Setting Options Default Setting Comments 3109 64-1 VGND 1.8 .. 200.0 V; ∞ 40.0 V 64-1 Ground Displace- ment Voltage 3110 64-1 VGND 10.0 .. 225.0 V; ∞ 70.0 V 64-1 Ground Displace- ment Voltage 3111...
Page 198 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Addr. Parameter Setting Options Default Setting Comments 3150 50Ns-2 Vmin 0.4 .. 50.0 V 2.0 V 50Ns-2 minimum voltage 3150 50Ns-2 Vmin 10.0 .. 90.0 V 10.0 V 50Ns-2 minimum voltage 3151 50Ns-2 Phi -180.0 ..
Page 199: Breaker Failure Protection 50Bf
Functions 2.12 Breaker Failure Protection 50BF 2.12 Breaker Failure Protection 50BF The breaker failure protection function monitors proper tripping of the relevant circuit breaker. 2.12.1 Description General If after a programmable time delay, the circuit breaker has not opened, breaker failure protection issues a trip signal to isolate the failure breaker by tripping other surrounding backup circuit breaker (see example in the figure below).
Page 200 Functions 2.12 Breaker Failure Protection 50BF the set threshold or thresholds (enabled w/ 3I0>) are detected, the breaker failure protection trips even if the auxiliary criterion indicates „Breaker Open“. Monitoring of the Current Flow Address 170 50BF can be set in such a way that either the current criterion can already be met by a single phase current (setting Enabled) or that another current is taken into consideration in order to check the plau- sibility (setting enabled w/ 3I0>), see Figure 2-73.
Page 201 Functions 2.12 Breaker Failure Protection 50BF Monitoring of the Circuit Breaker Auxiliary Contacts Evaluation of the circuit breaker's auxiliary contacts depends on the type of contacts, and how they are con- nected to the binary inputs: • the auxiliary contacts for circuit breaker "open" (4602 „>52-b“) and "closed" (4601 „>52-a“) are config- ured, •...
Page 202 Functions 2.12 Breaker Failure Protection 50BF Figure 2-75 Logic diagram of the breaker failure protection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 203: Setting Notes
Functions 2.12 Breaker Failure Protection 50BF 2.12.2 Setting Notes General Breaker failure protection is only effective and accessible if address 170 50BF is set to Enabled or enabled w/ 3I0>. Setting Enabled considers the three phase currents for total current monitoring. Setting enabled w/ 3I0>...
Page 204: Settings
Functions 2.12 Breaker Failure Protection 50BF 2.12.3 Settings The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec- ondary nominal current of the current transformer. Addr. Parameter Setting Options Default Setting Comments 7001 FCT 50BF 50BF Breaker Failure Pro- tection 7004 Chk BRK CONTACT...
Page 205: Flexible Protection Functions
Functions 2.13 Flexible Protection Functions 2.13 Flexible Protection Functions The flexible protection function is applicable for a variety of protection principles. The user can create up to 20 flexible protection functions and configure them according to their function. Each function can be used either as an autonomous protection function, as an additional protective element of an existing protection function or as a universal logic, e.g.
Page 206 Functions 2.13 Flexible Protection Functions Characteristic Characteristic / Measured Quantity Protective Function ANSI No. Mode of Operation Group Three- Single- phase phase Power Real power Reverse power protection 32R, 32, Power protection Reactive power Power protection cos ϕ Power factor Power factor Binary input –...
Page 207 Functions 2.13 Flexible Protection Functions Operating Mode, Measured Quantity, Measurement Method The flexible function can be tailored to assume a specific protective function for a concrete application in pa- rameters OPERRAT. MODE, MEAS. QUANTITY, MEAS. METHOD and PICKUP WITH. Parameter OPERRAT. MODE can be set to specify whether the function works 3-phase, 1-phase or no reference, i.e.
Page 208 Functions 2.13 Flexible Protection Functions Figure 2-77 Logic diagram of the flexible protection functions SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 209 Functions 2.13 Flexible Protection Functions The parameters can be set to monitor either exceeding or dropping below of the threshold. The configurable pickup delay time will be started once the threshold (>-Element) has been exceeded. When the delay time has elapsed and the threshold is still violated, the pickup of the phase (e.g.
Page 210: Setting Notes
Functions 2.13 Flexible Protection Functions 2.13.2 Setting Notes The setting of the functional scope determines the number of flexible protection functions to be used (see Chapter 2.1.1). If a flexible function in the functional scope is disabled (by removing the checkmark), this will result in losing all settings and configurations of this function or its settings will be reset to their default settings.
Page 211 Functions 2.13 Flexible Protection Functions Table 2-12 Parameter in the Settings Dialog "Measurement Procedure", Mode of Operation 3-phase Mode of Oper- Measured Notes ation Variable Three-phase Current, Parameter Voltage MEAS. METHOD Setting Options Fundamental Harmonic Only the fundamental harmonic is evaluated, higher harmon- ics are suppressed.
Page 212 Functions 2.13 Flexible Protection Functions Note With regard to the phase-selective pickup messages, a special behavior is observed in the three-phase voltage protection with phase-to-phase variables, because the phase-selective pickup message "Flx01 Pickup Lx" is allocated to the respective measured-value channel "Lx". Single-phase faults: If, for example, voltage V drops to such degree that voltages V...
Page 213 Functions 2.13 Flexible Protection Functions Table 2-13 Parameter in the Setting Dialog "Measurement Procedure", Mode of Operation 1-phase Mode of Measured Notes Operation Variable Single-phase Current, Parameter voltage MEAS. METHOD Setting Options Fundamental Harmonic Only the fundamental harmonic is evaluated, higher harmon- ics are suppressed.
Page 214 Functions 2.13 Flexible Protection Functions Settings The pickup thresholds, delay times and dropout ratios of the flexible protection function are set in the „Settings“ dialog box in DIGSI. The pickup threshold of the function is configured via parameter P.U. THRESHOLD. The OFF-command delay time is set via parameter T TRIP DELAY.
Page 215: Settings
Functions 2.13 Flexible Protection Functions 2.13.3 Settings Addresses which have an appended "A" can only be changed with DIGSI, under "Display Additional Settings". The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec- ondary nominal current of the current transformer. Addr.
Page 216 Functions 2.13 Flexible Protection Functions Addr. Parameter Setting Options Default Setting Comments P.U. THRESHOLD 0.05 .. 40.00 A 2.00 A Pickup Threshold P.U. THRESHOLD 0.05 .. 40.00 A 2.00 A Pickup Threshold 0.25 .. 200.00 A 10.00 A P.U. THRESHOLD 0.001 ..
Page 217: Information List
Functions 2.13 Flexible Protection Functions 2.13.4 Information List Information Type of In- Comments formation 235.2110 >BLOCK $00 >BLOCK Function $00 235.2111 >$00 instant. >Function $00 instantaneous TRIP 235.2112 >$00 Dir.TRIP >Function $00 Direct TRIP 235.2113 >$00 BLK.TDly >Function $00 BLOCK TRIP Time Delay 235.2114 >$00 BLK.TRIP >Function $00 BLOCK TRIP 235.2115 >$00 BL.TripA...
Page 218: Reverse-Power Protection Application With Flexible Protection Function
Functions 2.14 Reverse-Power Protection Application with Flexible Protection Function 2.14 Reverse-Power Protection Application with Flexible Protection Function 2.14.1 Description General By means of the flexible protection functions, a single-element or multi-element reverse power protection can be realized. Each reverse power element can be operated in single-phase or three-phase. Depending on the chosen option, the elements can evaluate active power forward, active power reverse, reactive power forward or reactive power reverse as measured value.
Page 219 Functions 2.14 Reverse-Power Protection Application with Flexible Protection Function Figure 2-78 Example of a substation supplied by the internal generator Substation Layout On the high-voltage side, the substation is linked to the power supply company's system via a 110 kV line. The circuit breaker CB1 is part of the power supply company's system.
Page 220 Functions 2.14 Reverse-Power Protection Application with Flexible Protection Function Table 2-15 System data for the application example System data Generator nominal power = 38.1 MVA Nom,Gen Transformer nominal power = 38.1 MVA Nom,Transf Nominal voltage of the high-voltage side = 110 kV Nominal voltage of busbar side = 11 kV Nominal primary CT current on the busbar side...
Page 221: Implementation Of The Reverse Power Protection
Functions 2.14 Reverse-Power Protection Application with Flexible Protection Function Figure 2-79 Wiring diagram for a 7SK80 as reverse power protection 2.14.2 Implementation of the Reverse Power Protection General The names of messages can be edited in DIGSI and adjusted accordingly for this example. The names of the parameters are fixed.
Page 222 Functions 2.14 Reverse-Power Protection Application with Flexible Protection Function Functional Logic The following logic diagram depicts the functional logic of the reverse power protection. Figure 2-80 Logic diagram of the reverse power determination with flexible protection function The reverse power protection picks up once the configured pickup threshold has been exceeded. If the pickup condition persists during the equally settable pickup delay, the pickup message P.rev.PU is generated and starts the trip delay time.
Page 223: Configuring The Reverse Power Protection In Digsi
Functions 2.14 Reverse-Power Protection Application with Flexible Protection Function 2.14.3 Configuring the Reverse Power Protection in DIGSI First create and open a 7SK80 device in the DIGSI manager. In the scope of functions, a flexible protection function (flexible function 01) is configured for the present example. Figure 2-81 Configuration of a flexible protection function Select „Additional Functions“...
Page 224 Functions 2.14 Reverse-Power Protection Application with Flexible Protection Function Figure 2-82 Configuration of a flexible protection function First activate the function at „Customize --> General“ and select the mode of operation „Three-Phase“. Figure 2-83 Selection of the three-phase mode of operation In the menu items „Meas.
Page 225 Functions 2.14 Reverse-Power Protection Application with Flexible Protection Function Figure 2-84 Setting options for the flexible function Allocation of the Reverse Power Protection The DIGSI configuration matrix initially shows the following indications (after having selected „Indications and commands only“ and „No filter“): Figure 2-85 Information of the flexible function –...
Page 226: Temperature Detection Via Rtd Boxes
Functions 2.15 Temperature Detection via RTD Boxes 2.15 Temperature Detection via RTD Boxes For the temperature detection you can connect up to 2 RTD boxes to RS485 (port B) or to the Ethernet (port A). Alternatively, you can connect up to 5 temperature sensors directly to the device via the I/O 2 extension module.
Page 227 Functions 2.15 Temperature Detection via RTD Boxes Processing Temperatures The evaluation of the temperatures measured via RTD box or the internal measuring function (temperature de- tection via I/O 2 extension module) is identical. The temperature raw data are converted into a temperature in degrees Celsius or Fahrenheit. The conversion depends on the temperature sensor used.
Page 228: Setting Notes
Functions 2.15 Temperature Detection via RTD Boxes Figure 2-88 Logic diagram of temperature processing with the extension module I/O 2 2.15.2 Setting Notes General Note In the following, "RTD box" is used to designate both the temperature detection via RTD box (RS485 and Ether- net port) and the temperature measurement via the I/O 2 extension module.
Page 229 Functions 2.15 Temperature Detection via RTD Boxes For RTD-Box 1 the IP adresse 192.168.100.20 is entered as follows: Figure 2-89 DIGSI Setting of RTD-Boxes Please consider that the IP adresses of the RTD-Boxes are in the same SubNetMask like the ethernet interface (Port A).
Page 230 Functions 2.15 Temperature Detection via RTD Boxes Note There is no conversion when changing the temperature unit. You have to re-parameterize the threshold value according to the selected unit. The settings for all connected temperature detectors of the first and second RTD box. can be made accordingly. Settings at the RTD box for RS485 connection If temperature detectors are used with two-wire connection, the line resistance (for short-circuited temperature detector) must be measured and adjusted.
Page 231: Settings
Functions 2.15 Temperature Detection via RTD Boxes 2.15.3 Settings Addresses which have an appended "A" can only be changed with DIGSI, under "Display Additional Settings". Addr. Parameter Setting Options Default Setting Comments 9000 UDP Port 0 .. 65535 5000 UDP service port in the RTD box 9001 IP address[0] 0 ..
Page 232 Functions 2.15 Temperature Detection via RTD Boxes Addr. Parameter Setting Options Default Setting Comments 9023 RTD 2 STAGE 1 -50 .. 250 °C; ∞ 100 °C RTD 2: Temperature Stage 1 Pickup 9024 RTD 2 STAGE 1 -58 .. 482 °F; ∞ 212 °F RTD 2: Temperature Stage 1 Pickup...
Page 233 Functions 2.15 Temperature Detection via RTD Boxes Addr. Parameter Setting Options Default Setting Comments 9052A RTD 5 LOCATION Other RTD 5: Location Ambient Winding Bearing Other 9053 RTD 5 STAGE 1 -50 .. 250 °C; ∞ 100 °C RTD 5: Temperature Stage 1 Pickup 9054 RTD 5 STAGE 1...
Page 234 Functions 2.15 Temperature Detection via RTD Boxes Addr. Parameter Setting Options Default Setting Comments 9081A RTD 8 TYPE Not connected Not connected RTD 8: Type Pt 100 Ω Ni 120 Ω Ni 100 Ω 9082A RTD 8 LOCATION Other RTD 8: Location Ambient Winding Bearing...
Page 235 Functions 2.15 Temperature Detection via RTD Boxes Addr. Parameter Setting Options Default Setting Comments 9106 RTD10 STAGE 2 -58 .. 482 °F; ∞ 248 °F RTD10: Temperature Stage 2 Pickup 9111A RTD11 TYPE Not connected Not connected RTD11: Type Pt 100 Ω Ni 120 Ω...
Page 236: Information List
Functions 2.15 Temperature Detection via RTD Boxes 2.15.4 Information List Information Type of In- Comments formation Fail: RTD int. Failure: RTD Int. Temperature Measurem. Fail: RTD-Box 1 Failure: RTD-Box 1 Fail: RTD-Box 2 Failure: RTD-Box 2 14101 Fail: RTD Fail: RTD (broken wire/shorted) 14111 Fail: RTD 1 Fail: RTD 1 (broken wire/shorted)
Page 237: Phase Rotation
Functions 2.16 Phase Rotation 2.16 Phase Rotation A phase rotation reversal is implemented in the 7SK80 using binary inputs and parameters. Applications • Phase rotation reversal ensures that all protection and monitoring functions operate correctly even with counter-clockwise rotation, without the need for two phases to be reversed. 2.16.1 Description General...
Page 238: Setting Notes
Functions 2.16 Phase Rotation 2.16.2 Setting Notes Setting the Function Parameter The normal phase sequence is set at 209 (see Section 2.1.3). If, on the system side, phase rotation is reversed temporarily, then this is communicated to the protective device using the binary input „>Reverse Rot.“ (5145).
Page 239: Function Logic
Functions 2.17 Function Logic 2.17 Function Logic The function logic coordinates the execution of protection and auxiliary functions, it processes the resulting de- cisions and information received from the system. This includes in particular: – Fault Detection / Pickup Logic –...
Page 240: Tripping Logic Of The Entire Device
Functions 2.17 Function Logic 2.17.2 Tripping Logic of the Entire Device General Tripping The trip signals for all protective functions are connected by OR and generate the message 511 „Relay TRIP“. This message can be configured to an LED or binary output, just as the individual tripping messages can. Terminating the Trip Signal Once the trip command is output by the protection function, it is recorded as message „Relay TRIP“...
Page 241: Auxiliary Functions
Functions 2.18 Auxiliary Functions 2.18 Auxiliary Functions The general functions of the device are described in chapter Auxiliary Functions. 2.18.1 Message Processing After the occurrence of a system fault, information regarding the response of the protective relay and the mea- sured values is important for a detailed analysis.
Page 242: Information Via Display Field Or Pc
Functions 2.18 Auxiliary Functions 2.18.1.2 Information via Display Field or PC Using the front PC interface or the port B at the botton, a personal computer can be connected, to which the information can be sent. The relay is equipped with several event buffers for operational messages, circuit breaker statistics, etc., which are protected against loss of the auxiliary voltage by a buffer battery.
Page 243: Information To A Control Center
Functions 2.18 Auxiliary Functions Retrievable Messages The messages for the last eight network faults can be retrieved and read out. The definition of a network fault is such that the time period from fault detection up to final clearing of the disturbance is considered to be one network fault.
Page 244: Statistics
Functions 2.18 Auxiliary Functions 2.18.2 Statistics The number of trips initiated by the 7SK80 and the operating hours under load are counted. An additional counter allows the number of hours to be determined in which the circuit breaker is positioned in condition „open“.
Page 245: Circuit Breaker Maintenance
Functions 2.18 Auxiliary Functions 2.18.2.2 Circuit Breaker Maintenance General The procedures aiding in CB maintenance allow maintenance intervals of the CB poles to be carried out when their actual degree of wear makes it necessary. Saving on maintenance and servicing costs is one of the main benefits this functionality offers.
Page 246 Functions 2.18 Auxiliary Functions As the load on the switch depends on the current amplitude and duration of the actual switching action, includ- ing arc deletion, determination of the start and end criteria is of great importance. The procedures ΣI , 2P and t make use of the same criteria for that purpose.
Page 247 Functions 2.18 Auxiliary Functions Figure 2-94 Logic of the start and end criterion SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 248 Functions 2.18 Auxiliary Functions Σ I-Procedure Being a basic function, the ΣI-procedure is unaffected by the configuration and does not require any procedu- respecific settings. All tripping currents occurring 1½ periods after a protective trip, are summed up for each phase.
Page 249 Functions 2.18 Auxiliary Functions yet be carried out at a tripping current of 10 kA. The characteristic is determined by two vertices and their con- necting line. Point P1 is determined by the number of permitted operating cycles at rated operating current Ir, point P2 by the maximum number of operating cycles at rated fault tripping current Isc.
Page 250 Functions 2.18 Auxiliary Functions Figure 2-96 Value limitation of directional coefficient If the current criterion described in the Section „General“ grants the phase-selective logic release, the present number of operating cycles is calculated based on the tripping currents determined when the CB operating time on tripping has elapsed.
Page 251: Motor Statistics
Functions 2.18 Auxiliary Functions Commissioning Usually, no measures are required for commissioning. However, should the protection device be exchanged (e.g. old circuit breaker and a new protection device), the initial values of the respective limit or statistical values must be determined via the switching statistics of the respective circuit breaker. 2.18.2.3 Motor Statistics General There are two different types of statistical motor data:...
Page 252 Functions 2.18 Auxiliary Functions Circuit Breaker Maintenance Under address 172 52 B.WEAR MONIT one of the alternatives ΣI procedure, 2P procedure, I t procedure or Disabled can be set. All parameters relevant to this function are available at parameter block P.System Data 1 (see Section 2.1.3 ).
Page 253 Functions 2.18 Auxiliary Functions Σ I Procedure Parameter 172 52 B.WEAR MONIT can be set to activate the ΣI procedure. In order to facilitate evaluating the sum of all tripping current powers, the values are referred to the involuted CB rated operational current. This value is indicated in the CB data at address 260 Ir-52 in the P.System Data 1 and can be set as primary value.
Page 254: Information List
Functions 2.18 Auxiliary Functions 2.18.2.5 Information List Information Type of In- Comments formation #of TRIPs= Number of TRIPs= >BLOCK Op Count >BLOCK Op Counter 1020 Op.Hours= Counter of operating hours 1021 Σ Ia = Accumulation of interrupted current Ph A 1022 Σ...
Page 255: Measurement
Functions 2.18 Auxiliary Functions 2.18.3 Measurement A series of measured values and the values derived from them are constantly available for call up on site, or for data transfer. Applications • Information on the actual status of the system • Conversion of secondary values to primary values and percentages Prerequisites Except for secondary values, the device is able to indicate the primary values and percentages of the measured values.
Page 256: Display Of Measured Values
Functions 2.18 Auxiliary Functions 2.18.3.1 Display of Measured Values Table 2-17 Conversion formulae between secondary, primary and percentage measured values Measured second- primary values = 3 ·I N sec (calculated) = measured N sec value from the I input Ns sec. 3I0real 3I0reactive = measured...
Page 257 Functions 2.18 Auxiliary Functions Depending on the type of device ordered and the device connections, some of the operational measured values listed below may not be available. The phase–to–Ground voltages are either measured directly, if the voltage inputs are connected phase–to–Ground, or they are calculated from the phase–to–phase voltages V A–B and the displacement voltage V B–C...
Page 258: Transmitting Measured Values
Functions 2.18 Auxiliary Functions 2.18.3.2 Transmitting Measured Values Measured values can be transferred to a central control and storage device via port B. The measuring range in which these values are transmitted depend on the protocol and, if necessary, additional settings.
Page 259 Functions 2.18 Auxiliary Functions Information Type of In- Comments formation Phi B = Angle Vb-Ib Phi C = Angle Vc-Ic INs Real Resistive ground current in isol systems INs Reac Reactive ground current in isol systems Θ Rotor Temperature of Rotor Thermal Overload Θ/Θtrip T reclose=...
Page 260: Average Measurements
Functions 2.18 Auxiliary Functions 2.18.4 Average Measurements The long-term averages are calculated and output by the 7SK80. 2.18.4.1 Description Long-Term Averages The long-term averages of the three phase currents I , the positive sequence components I for the three phase currents, and the real power P, reactive power Q, and apparent power S are calculated within a set period of time and indicated in primary values.
Page 261: Information List
Functions 2.18 Auxiliary Functions 2.18.4.4 Information List Information Type of In- Comments formation I1 dmd= I1 (positive sequence) Demand P dmd = Active Power Demand Q dmd = Reactive Power Demand S dmd = Apparent Power Demand Ia dmd= I A demand Ib dmd= I B demand Ic dmd=...
Page 262: Settings
Functions 2.18 Auxiliary Functions 2.18.5.3 Settings Addr. Parameter Setting Options Default Setting Comments 8311 MinMax cycRESET Automatic Cyclic Reset Function 8312 MiMa RESET TIME 0 .. 1439 min 0 min MinMax Reset Timer 8313 MiMa RESETCYCLE 1 .. 365 Days 7 Days MinMax Reset Cycle Period 8314...
Page 263 Functions 2.18 Auxiliary Functions Information Type of In- Comments formation Ib Max= Ib Max Ic Min= Ic Min Ic Max= Ic Max I1 Min= I1 (positive sequence) Minimum I1 Max= I1 (positive sequence) Maximum Va-nMin= Va-n Min Va-nMax= Va-n Max Vb-nMin= Vb-n Min Vb-nMax=...
Page 264: Set Points For Measured Values
Functions 2.18 Auxiliary Functions 2.18.6 Set Points for Measured Values SIPROTEC devices facilitate the setting of limit values for some measured and metered values. If any of these limit values is reached, exceeded or fallen below during operation, the device issues an alarm which is indicat- ed in the form of an operational message.
Page 265: Set Points For Statistic
Functions 2.18 Auxiliary Functions 2.18.7 Set Points for Statistic 2.18.7.1 Description For the statistical counters, limit values may be entered so that a message is generated as soon as they are reached. These messages can be allocated to both output relays and LEDs. 2.18.7.2 Setting Notes Limit Values for the Statistics Counter The limit values for the statistics counters can be set in DIGSI under Annunciation →...
Page 266: Energy Metering
Functions 2.18 Auxiliary Functions 2.18.8 Energy Metering Metered values for active and reactive energy are determined by the device. They can be output via the display of the device, read out with DIGSI via the operator interface or transmitted to a control center via port B. 2.18.8.1 Description Metered Values for Active and Reactive Energy Metered values of the real power W...
Page 267: Commissioning Aids
Functions 2.18 Auxiliary Functions 2.18.9 Commissioning Aids In test mode or during commissioning, the device information transmitted to a central or storage device can be influenced. There are tools available for testing the system interface (port B) and the binary inputs and outputs of the device.
Page 268 Functions 2.18 Auxiliary Functions Creating Oscillographic Recordings for Tests During commissioning, energization sequences should be carried out to check the stability of the protection also during closing operations. Oscillographic event recordings contain the maximum information on the be- havior of the protection. Along with the capability of storing fault recordings via pickup of the protection function, the 7SK80 also has the capability of capturing the same data when commands are given to the device via the service program DIGSI, the serial interface, or a binary input.
Page 269: Breaker Control
Functions 2.19 Breaker Control 2.19 Breaker Control A control command function is integrated in the SIPROTEC 4 7SK80 to coordinate the operation of circuit breakers and other equipment in the power system. Control commands can originate from four command sources: •...
Page 270: Information List
Functions 2.19 Breaker Control Operation Using DIGSI Switchgear can be controlled via the operator control interface with a PC using the DIGSI software. The pro- cedure to do so is described in the SIPROTEC 4 System Description (Control of Switchgear). Operation Using the System Interface Switchgear can be controlled via the serial system interface and a connection to the substation control equip- ment.
Page 271: Command Types
Functions 2.19 Breaker Control 2.19.2 Command Types In conjunction with the power system control several command types can be distinguished for the device: 2.19.2.1 Description Commands to the Process These are all commands that are directly output to the switchgear to change their process state: •...
Page 272: Command Sequence
Functions 2.19 Breaker Control 2.19.3 Command Sequence Safety mechanisms in the command sequence ensure that a command can only be released after a thorough check of preset criteria has been successfully concluded. Standard Interlocking checks are provided for each individual control command. Additionally, user-defined interlocking conditions can be programmed separately for each command.
Page 273: Interlocking
Functions 2.19 Breaker Control 2.19.4 Interlocking System interlocking is executed by the user-defined logic (CFC). 2.19.4.1 Description Interlocking checks in a SICAM/SIPROTEC 4 system are normally divided in the following groups: • System interlocking relies on the system data base in the substation or central control system. •...
Page 274 Functions 2.19 Breaker Control Figure 2-98 Example of an operational annunciation for switching circuit breaker 52 (Q0) Standard Interlocking (default) The standard interlockings contain the following fixed programmed tests for each switching device, which can be individually enabled or disabled using parameters: •...
Page 275 Functions 2.19 Breaker Control Figure 2-99 Standard interlockings The following figure shows the configuration of the interlocking conditions using DIGSI. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 276 Functions 2.19 Breaker Control Figure 2-100 DIGSI dialog box for setting the interlocking conditions The configured interlocking causes are displayed on the device display. They are marked by letters explained in the following table. Table 2-19 Command types and corresponding messages Interlocking Commands Abbrev.
Page 277 Functions 2.19 Breaker Control The "Switching authority" object serves for interlocking or enabling LOCAL control but not REMOTE or DIGSI commands. With a 7SK80, the switching authority can be changed between "REMOTE" and "LOCAL" on the operator panel after having entered the password or by means of CFC also via binary inputs and a function key. The "Switching authority DIGSI"...
Page 278 Functions 2.19 Breaker Control Switching Mode The switching mode serves for activating or deactivating the configured interlocking conditions at the time of the switching operation. The following switching modes (local) are defined: • For local commands (CS = LOCAL) – locked (normal) or –...
Page 279 Functions 2.19 Breaker Control Blocking by Protection The pickup of protective elements blocks switching operations. Protective elements are configured, separately for each switching component, to block specific switching commands sent in CLOSE and TRIP direction. When enabled, "Block CLOSE commands" blocks CLOSE commands, whereas "Block TRIP commands" blocks TRIP signals.
Page 280: Command Logging
Functions 2.19 Breaker Control 2.19.5 Command Logging During the processing of the commands, independent of the further message routing and processing, command and process feedback information are sent to the message processing centre. These messages contain information on the cause. With the corresponding allocation (configuration) these messages are entered in the event list, thus serving as a report.
Page 281: Notes On Device Operation
Functions 2.20 Notes on Device Operation 2.20 Notes on Device Operation The operation of the 7SK80 slightly differs from the other SIPROTEC 4 devices. These differences are de- scribed in the following. General information regarding the operation and configuration of SIPROTEC 4 devices is set out in the SIPROTEC 4 System Description.
Page 282 Functions 2.20 Notes on Device Operation In part, the sixth line is used for representing e.g. the active parameter group. Figure 2-102 Representation of the active parameter group (line 6) ■ SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 283 Functions 2.20 Notes on Device Operation SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 284 Functions 2.20 Notes on Device Operation SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 285: Mounting And Commissioning
Mounting and Commissioning This chapter is intended for experienced commissioning staff. He must be familiar with the commissioning of protection and control systems, the management of power systems and the safety rules and regulations. Hard- ware adjustments to the power system data might be necessary. The primary tests require the protected object (line, transformer, etc.) to carry load.
Page 286: Mounting And Connections
Mounting and Commissioning 3.1 Mounting and Connections Mounting and Connections General WARNING! Warning of improper transport, storage, installation or assembly of the device. Failure to observe these precautions can result in death, personal injury, or serious material damage. Trouble-free and safe use of this device depends on proper transport, storage, installation, and assembly of the device according to the warnings in this device manual.
Page 287 Mounting and Commissioning 3.1 Mounting and Connections Setting Group Change Function If binary inputs are used to switch setting groups, please observe the following: • Two binary inputs must be dedicated to the purpose of changing setting groups when four groups are to be switched.
Page 288 Mounting and Commissioning 3.1 Mounting and Connections Figure 3-2 Trip circuit supervision with one binary input This results in an upper limit for the resistance dimension, R , and a lower limit R , from which the optimal value of the arithmetic mean R should be selected: In order that the minimum voltage for controlling the binary input is ensured, R is derived as: So the circuit breaker trip coil does not remain energized in the above case, R...
Page 289 Mounting and Commissioning 3.1 Mounting and Connections If the calculation has the result R < R , the calculation has to be repeated with the next smaller threshold . This threshold is determined via the parameters 220 Threshold BI 1 to 226 Threshold BI 7 The BI min settings Thresh.
Page 290: Hardware Modifications
Any service activities exceeding the installation or exchange of commu- nication modules must only be carried out by Siemens personnel. For preparing the workplace, a pad suitable for electrostatic sensitive devices (ESD) is required.
Page 291 Mounting and Commissioning 3.1 Mounting and Connections Note In order to minimize the expenditure for reconnecting the device, remove the completely wired terminal blocks from the device. To do so, open the elastic holders of the terminal blocks in pairs with a flat screwdriver and remove the terminal blocks to the back.
Page 292 Make sure that the defective fuse has not left any obvious damage on the device. If the fuse trips again after reconnection of the device, refrain from any further repairs and send the device to Siemens for repair. The device can now be reassembled again (see Section Reassembly).
Page 293: Connections Of The Current Terminals
Mounting and Commissioning 3.1 Mounting and Connections 3.1.2.2 Connections of the Current Terminals Fixing Elements The fixing elements for the transformer connection are part of the current terminal (housing side). They have a stress-crack- and corrosion-resistant alloy. The head shape of the terminal screw allows for using a flat screw- driver (5.5 mm x 1.0 mm / 0.20 in x 0.039 in) or a crosstip screwdriver (PZ2).
Page 294 Mounting and Commissioning 3.1 Mounting and Connections As single wires, solid conductors as well as stranded conductors with conductor sleeves can be used. Up to two single wires with identical cross-sections can be used per connection. Alternatively, short cicuit links (Order no. C53207-A406-D193-1) can be used for vertically arranged terminal points.
Page 295: Connections Of The Voltage Terminals
Mounting and Commissioning 3.1 Mounting and Connections 3.1.2.3 Connections of the Voltage Terminals Fixing Elements The fixing elements for the voltage transformer connection are part of the voltage terminal (housing side). They have a stress-crack- and corrosion-resistant alloy. The head shape of the terminal screw allows for using a flat screwdriver (4.0 mm x 0.8 mm / 0.16 in x 0.031 in) or a crosstip screwdriver (PZ1).
Page 296 Mounting and Commissioning 3.1 Mounting and Connections Figure 3-7 Cable connection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 297 Mounting and Commissioning 3.1 Mounting and Connections Figure 3-8 Terminal block “D” with cover SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 298: Interface Modules
Mounting and Commissioning 3.1 Mounting and Connections 3.1.2.5 Interface Modules General The 7SK80 relay is supplied with preconfigured interfaces according to the ordering version. You do not have to make any adaptations to the hardware (e.g. plugging in jumpers) yourself, except for the installation or re- placement of communication modules.
Page 299 Mounting and Commissioning 3.1 Mounting and Connections Figure 3-10 Installation of the Ethernet interface Now, a SIPROTEC 4 communication module can be installed (see Section Installation or Replacement of a SIPROTEC 4 Communication Module). Otherwise, the device can be reassembled again (see Section Reas- sembly).
Page 300: Reassembly
Mounting and Commissioning 3.1 Mounting and Connections Figure 3-11 Installation of a SIPROTEC 4 communication module The device can now be reassembled again (see Section Reassembly). 3.1.2.6 Reassembly The reassembly of the device is performed in the following steps: Carefully insert the complete electronics block into the housing. Please observe the following: The connections of the communication modules point at the bottom of the housing.
Page 301 Mounting and Commissioning 3.1 Mounting and Connections Figure 3-12 Reassembling of the device Fix the front cover to the housing with the two medium screws at the top and bottom of the front cover. The two covers can be inserted again either now or after the reinstallation of the device. Now install the device in accor- dance with the Sections Panel Flush Mounting, Panel Surface Mounting or Cubicle Mounting.
Page 302: Installation
Mounting and Commissioning 3.1 Mounting and Connections 3.1.3 Installation 3.1.3.1 General The 7SK80 relay has a housing size 1/6. The housing has 2 covers and 4 fixing holes each at the top and bottom (see Figure 3-13 and Figure 3-14). Figure 3-13 Housing with covers Figure 3-14...
Page 303: Panel Flush Mounting
Mounting and Commissioning 3.1 Mounting and Connections 3.1.3.2 Panel Flush Mounting The housing (housing size ) has 2 covers and 4 fixing holes. • Remove the 2 covers at the top and bottom of the front cover. Thus, 4 elongated holes are revealed in the mounting bracket and can be accessed.
Page 304: Cubicle Mounting
Mounting and Commissioning 3.1 Mounting and Connections 3.1.3.3 Cubicle Mounting To install the device in a rack or cubicle, two mounting brackets are required. The ordering codes are stated in Appendix, Section A.1. The housing (housing size ) has 2 covers and 4 fixing holes. •...
Page 305: Panel Surface Mounting
Mounting and Commissioning 3.1 Mounting and Connections 3.1.3.4 Panel Surface Mounting When ordering the device as surface-mounting case (9th digit of the ordering number= B), the mounting frame shown below is part of the scope of delivery. For installation, proceed as follows: •...
Page 306: Checking Connections
Mounting and Commissioning 3.2 Checking Connections Checking Connections 3.2.1 Checking the Data Connections of the Interfaces Pin Assignment The following tables show the pin assignment of the various interfaces. The position of the connections can be seen in the following figures. Figure 3-18 USB interface Figure 3-19...
Page 307 Mounting and Commissioning 3.2 Checking Connections USB Interface The USB interface can be used to establish a connection between the protection device and your PC. For the communication, the Microsoft Windows USB driver is used which is installed together with DIGSI (as of version V4.82).
Page 308 Mounting and Commissioning 3.2 Checking Connections Connections at port B When a serial interface of the device is connected to a control center, the data connection must be checked. A visual check of the assignment of the transmit and receive channels is important. With RS232 and fiber optic interfaces, each connection is dedicated to one transmission direction.
Page 309 Connection of temperature sensors directly to the device (only 7SK805/7SK806 ): In principle, 2-wire or 3-wire connection of temperature sensors is possible. Siemens recommends, however, to use only 3-wire connections. When using 2-wire connections, short circuit links must be used e.g. for RTD 2 between D3 and D5.
Page 310: Checking The System Connections
Mounting and Commissioning 3.2 Checking Connections 3.2.2 Checking the System Connections WARNING! Warning of dangerous voltages Non-observance of the following measures can result in death, personal injury or substantial property damage. Therefore, only qualified people who are familiar with and adhere to the safety procedures and precautionary measures should perform the inspection steps.
Page 311 Mounting and Commissioning 3.2 Checking Connections • If the voltage measurement is carried out via feedthrough capacitances, the feedthrough capacitance for the 7SK80 must be available exclusively.. Parallel connections such as, for example, CAPDIS are not permis- sible. In the case of a voltage measurement via feedthrough capacitances, the value of the individual capacitances C1 and C2 for the three phases must be known approximately (also see Section 2.1.3.2,„...
Page 312: Commissioning
Mounting and Commissioning 3.3 Commissioning Commissioning WARNING! Warning of dangerous voltages when operating an electrical device Non-observance of the following measures can result in death, personal injury or substantial property damage. Only qualified people shall work on and around this device. They must be thoroughly familiar with all warnings and safety notices in this instruction manual as well as with the applicable safety steps, safety regulations, and precautionary measures.
Page 313: Test Mode And Transmission Block
Mounting and Commissioning 3.3 Commissioning 3.3.1 Test Mode and Transmission Block Activation and Deactivation If the device is connected to a central or main computer system via the SCADA interface, then the information that is transmitted can be influenced. This is only possible with some of the protocols available (see Table „Pro- tocol-dependent functions“...
Page 314 Mounting and Commissioning 3.3 Commissioning Figure 3-22 Interface test with the dialog box: creating messages – example Changing the Operating State When clicking one of the buttons in the column Action for the first time, you will be prompted for the password no.
Page 315: Configuring Communication Modules
Mounting and Commissioning 3.3 Commissioning 3.3.3 Configuring Communication Modules Required Settings in DIGSI 4 The following applies in general: In the case of a first-time installation or replacement of a communication module, the ordering number (MLFB) does not need to be changed. The ordering number can be retained. Thus, all previously created parameter sets remain valid for the device.
Page 316 Mounting and Commissioning 3.3 Commissioning Mapping File For Profibus DP, Modbus, DNP3.0 and VDEW Redundant, a matching bus mapping has to be selected. For selecting the mapping file, please open the SIPROTEC device in DISGI and under "Parameter" select the function "Interfaces" (see Figure 3-24). The dialog box "Interface parameters"...
Page 317 Mounting and Commissioning 3.3 Commissioning Figure 3-25 Module-specific settings Then, transfer the data to the protection device (see the following figure). Figure 3-26 Transmitting data SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 318: Checking The Status Of Binary Inputs And Outputs
Mounting and Commissioning 3.3 Commissioning Terminal Test The system interface (EN 100) is preassigned with the default value zero and the module is thus set to DHCP mode. The IP address can be set in the DIGSI Manager (Object properties... / Communication parameters / System interface [Ethernet]).
Page 319 Mounting and Commissioning 3.3 Commissioning Structure of the Test Dialog Box The dialog box is classified into three groups: BI for binary inputs, REL for output relays, and LED for light- emitting diodes. On the left of each of these groups is an accordingly labelled button. By double-clicking a button, information regarding the associated group can be shown or hidden.
Page 320 Mounting and Commissioning 3.3 Commissioning Proceed as follows in order to check the output relay : • Ensure that the switching of the output relay can be executed without danger (see above under DANGER!). • Each output relay must be tested via the corresponding Scheduled-cell in the dialog box. •...
Page 321: Tests For Circuit Breaker Failure Protection
Mounting and Commissioning 3.3 Commissioning 3.3.5 Tests for Circuit Breaker Failure Protection General If the device provides a breaker failure protection and if this is used, the integration of this protection function in the system must be tested under practical conditions. Due to the variety of application options and the available system configurations, it is not possible to make a detailed description of the necessary tests.
Page 322: Testing User-Defined Functions
Mounting and Commissioning 3.3 Commissioning • After every start, the message „50BF ext Pickup“ (FNo 1457) must appear in the spontaneous or fault annunciations. • After time expiration TRIP-Timer (address 7005) tripping command of the circuit breaker failure protection. Open the circuit breaker again. Busbar Tripping For testing the distribution of the trip commands in the substation in the case of breaker failures it is important to check that the trip commands to the adjacent circuit breakers is correct.
Page 323: Current, Voltage, And Phase Rotation Testing
Mounting and Commissioning 3.3 Commissioning 3.3.7 Current, Voltage, and Phase Rotation Testing Preliminary Remark Note The voltage and phase rotation test is only relevant for devices with voltage transformers. ≥ 10 % of Load Current The connections of the current and voltage transformers are tested using primary quantities. Secondary load current of at least 10 % of the nominal current of the device is necessary.
Page 324: Testing The Reverse Interlocking Scheme
Mounting and Commissioning 3.3 Commissioning Voltage Transformer Miniature Circuit Breaker (VT mcb) The VT mcb of the feeder (if used) must be opened. The measured voltages in the operational measured values appear with a value close to zero (small measured voltages are of no consequence). Check in the spontaneous annunciations that the VT mcb trip was entered (annunciation „>FAIL:FEEDER VT“...
Page 325: Direction Check With Load Current
Mounting and Commissioning 3.3 Commissioning 3.3.9 Direction Check with Load Current Preliminary Remark Note The direction check is only relevant for devices with voltage transformers. ≥ 10 % of Load Current The correct connection of the current and voltage transformers is tested via the protected line using the load current.
Page 326: Polarity Check For Voltage Input V
Mounting and Commissioning 3.3 Commissioning 3.3.10 Polarity Check for Voltage Input V Depending on the application of the voltage measuring input V of a 7SK80, a polarity check may be necessary. If no measuring voltage is connected to this input, this section is irrelevant. (Power System Data 1 address 213 If input V is used for the measurement of the displacement voltage V...
Page 327: Polarity Check For Current Input I
Mounting and Commissioning 3.3 Commissioning Polarity Check for Current Input I 3.3.12 General If the standard connection of the device is used with current input I connected in the neutral point of the set of current transformers (see also connection circuit diagram in Appendix A.3), then the correct polarity of the ground current path usually occurs automatically.
Page 328 Mounting and Commissioning 3.3 Commissioning Figure 3-29 Polarity testing for I , example with current transformers configured in a Holmgreen-connection (VTs with broken delta connection - e-n winding) Figure 3-30 Polarity testing for I , example with current transformers configured in a Holmgreen-connection (VTs Wye-connected) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 329: Checking The Temperature Detection
Mounting and Commissioning 3.3 Commissioning 3.3.13 Checking the Temperature Detection Temperature Measurement using RTD Boxes When connecting RTD boxes to the RS485 interface, please check the setting of the bus address at the pro- tection device as described in the section 3.2. When connecting RTD boxes to the Ethernet port, you have to carry out the preparatory steps for commission- ing first which are described in the operating manual.
Page 330: Trip/Close Tests For The Configured Operating Devices
Mounting and Commissioning 3.3 Commissioning Temperature in °C Temperature in °F Ni 100 DIN 43760 Ni 120 DIN 34760 Pt 100 IEC 60751 223.152552 267.783063 168.4783 231.782912 278.139495 172.172925 240.66 288.792 175.856 249.79516 299.754192 179.527525 259.200121 311.040145 183.1875 268.886968 322.664362 186.835925 278.868111 334.641733...
Page 331: Creating Oscillographic Recordings For Tests
Mounting and Commissioning 3.3 Commissioning 3.3.15 Creating Oscillographic Recordings for Tests General In order to be able to test the stability of the protection during switchon procedures also, switchon trials can also be carried out at the end. Oscillographic records obtain the maximum information about the behaviour of the protection.
Page 332: Final Preparation Of The Device
Mounting and Commissioning 3.4 Final Preparation of the Device Final Preparation of the Device Firmly tighten all screws. Tighten all terminal screws, including those that are not used. Caution! Inadmissable Tightening Torques Non–observance of the following measure can result in minor personal injury or property damage. The tightening torques must not be exceeded as the threads and terminal chambers may otherwise be dam- aged! The settings should be checked again, if they were changed during the tests.
Page 333 Technical Data This chapter provides the technical data of the device SIPROTEC 7SK80 and its individual functions, including the limit values that may not be exceeded under any circumstances. The electrical and functional data for the maximum functional scope are followed by the mechanical specifications with dimensioned drawings.
Page 334: Technical Data
Technical Data 4.1 General Device Data General Device Data 4.1.1 Analog Inputs Current Inputs Nominal Frequency 50 Hz or 60 Hz (adjustable) Frequency working range (independent of the 25 Hz to 79 Hz nominal frequency) Nominal current 1 A or 5 A Ground current, sensitive ≤...
Page 335: Auxiliary Voltage
Technical Data 4.1 General Device Data 4.1.2 Auxiliary Voltage DC Voltage Voltage supply via an integrated converter Nominal auxiliary DC voltage V – 24 V to 48 V 60 V to 250 V Permissible voltage ranges 19 V to 60 V 48 V to 300 V Overvoltage category, IEC 60255-27 AC ripple voltage peak to peak, IEC 60255-11...
Page 336: Binary Inputs And Outputs
Technical Data 4.1 General Device Data 4.1.3 Binary Inputs and Outputs Binary Inputs Variant Quantity 7SK801/803/805/806 3 (configurable) 7SK802/804 7 (configurable) Nominal Direct Voltage Range 24 V to 250 V Current input, energized (independent of the control Approx. 0.4 mA voltage) Pickup time Approx.
Page 337: Communication Interfaces
Technical Data 4.1 General Device Data 4.1.4 Communication Interfaces Operator Interface Terminal Front side, non-isolated, USB type B socket for connecting a personal computer Operation from DIGSI V4.82 via USB 2.0 full speed Operation With DIGSI Transmission speed up to 12 Mbit/s max. Bridgeable distance Port A Ethernet electrical for DISGI or...
Page 338 Technical Data 4.1 General Device Data Fiber optic cable (FO) FO connector type ST connector Terminal Back case bottom, mounting location "B" Optical wavelength λ = 820 nm Laser Class 1 according to EN When using glass fiber 50/125 μm or glass 60825-1/-2 fiber 62.5/125 µm Permissible optical signal at-...
Page 339: Electrical Tests
Technical Data 4.1 General Device Data DNP3.0 /MODBUS FO FO connector type ST connector transmitter/receiver Terminal Back case bottom, mounting location "B" Transmission speed Up to 19 200 Baud Optical wavelength λ = 820 nm Laser Class 1 according to EN When using glass fiber 50/125 μm or glass 60825-1/-2 fiber 62.5/125 µm...
Page 340 Technical Data 4.1 General Device Data Insulation test RTD inputs RTD (Pt 100 inputs) 500 V, 50 Hz SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 341 Technical Data 4.1 General Device Data EMC Tests for Immunity (Type Tests) Standards: IEC 60255-6 and -22, (product standards) IEC/EN 61000-6-2 VDE 0435 For more standards see also individual functions 1 MHz test, Class III IEC 60255-22-1, IEC 61000-4-18, IEEE 2.5 kV (Peak);...
Page 342: Mechanical Stress Tests
Technical Data 4.1 General Device Data 4.1.6 Mechanical Stress Tests Vibration and Shock Stress during Stationary Operation Standards: IEC 60255-21 and IEC 60068 Oscillation Sinusoidal IEC 60255-21-1, Class II; 10 Hz to 60 Hz: ± 0,075 mm amplitude; 60 Hz to 150 Hz: IEC 60068-2-6 1g acceleration frequency sweep rate 1 octave/min 20 cycles in 3 orthog-...
Page 343: Climatic Stress Tests
56 days of the year up to 93 % relative humidity; con- densation must be avoided! Siemens recommends that all devices be installed such that they are not exposed to direct sunlight, nor subject to large fluctuations in temperature that may cause condensation to occur.
Page 344: Design
Technical Data 4.1 General Device Data 4.1.9 Design Case 7XP20 Dimensions see dimensional drawings, Section 4.22 Device Case Size Weight 7SK80**-*B for panel surface mounting 4.5 kg (9.9 lb) 7SK80**-*E for panel flush mounting 4 kg (8.8 lb) Protection type acc. to IEC 60529 For equipment in the surface-mounting case IP 50 For equipment in flush mounting case...
Page 345: Definite-Time Overcurrent Protection 50(N)
Technical Data 4.2 Definite-Time Overcurrent Protection 50(N) Definite-Time Overcurrent Protection 50(N) Operating Modes Three-phase Standard Two-phase Phases A and C Measuring Method All elements First harmonic, r.m.s. value (true RMS) 51Ns-3 Additional instantaneous values Setting Ranges / Increments Pickup current 50–1, 50–2 (phases) forI = 1 A 0.10 A to 35.00 A or ∞...
Page 346 Technical Data 4.2 Definite-Time Overcurrent Protection 50(N) Influencing Variables for Pickup and Dropout Auxiliary DC voltage in range 0.8 ≤ V ≤ 1.15 AuxNom Temperature in range –5 °C (41 °F) ≤ Θ ≤ 55 °C (131 °F) 0.5 %/10 K Frequency in range of 50 Hz to 70 Hz Frequency in range 0.95 ≤...
Page 347: Inverse-Time Overcurrent Protection 51(N)
Technical Data 4.3 Inverse-Time Overcurrent Protection 51(N) Inverse-Time Overcurrent Protection 51(N) Operating Modes Three-phase Standard Two-phase Phases A and C Measuring Technique All elements First harmonic, rms value (true rms) Setting Ranges / Increments Pickup currents 51 (phases) for I = 1 A 0.10 A to 4.00 A Increments 0.01 A for I...
Page 348 Technical Data 4.3 Inverse-Time Overcurrent Protection 51(N) Dropout Time Characteristics with Disk Emulation acc. to IEC Acc. to IEC 60255-3 or BS 142, Section 3.5.2 (see also Figures 4-1 and 4-2) The dropout time curves apply to (I/Ip) ≤ 0.90 For zero sequence current, read 3I0p instead of I and T instead of T...
Page 349 Technical Data 4.3 Inverse-Time Overcurrent Protection 51(N) Figure 4-1 Dropout time and trip time curves of the inverse time overcurrent protection, acc. to IEC SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 350 Technical Data 4.3 Inverse-Time Overcurrent Protection 51(N) Figure 4-2 Dropout time and trip time curves of the inverse time overcurrent protection, acc. to IEC SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 351 Technical Data 4.3 Inverse-Time Overcurrent Protection 51(N) Trip Time Curves acc. to ANSI Acc. to ANSI/IEEE (see also Figures 4-3 to 4-6) The tripping times for I/I ≥ 20 are identical with those for I/I = 20. For zero sequence current read 3I0p instead of I and T instead of T 3I0p...
Page 352 Technical Data 4.3 Inverse-Time Overcurrent Protection 51(N) Dropout Time Characteristics with Disk Emulation acc. to ANSI/IEEE Acc. to ANSI/IEEE (see also Figures 4-3 to 4-6) The dropout time curves apply to (I/Ip) ≤ 0.90 For zero sequence current read 3I0p instead of I and T instead of T 3I0p...
Page 353 Technical Data 4.3 Inverse-Time Overcurrent Protection 51(N) Influencing Variables for Pickup and Dropout Power supply direct voltage in range 0.8 ≤ V ≤ 1.15 PSNom Temperature in range 23.00 °F (-5 °C) ≤ Θ ≤ 131.00 °F (55 °C) 0.5 %/10 K Frequency in range of 50 Hz to 70 Hz Frequency in range 0.95 ≤...
Page 354 Technical Data 4.3 Inverse-Time Overcurrent Protection 51(N) Figure 4-3 Dropout time and trip time curves of the inverse time overcurrent protection, acc. to ANSI/IEEE SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 355 Technical Data 4.3 Inverse-Time Overcurrent Protection 51(N) Figure 4-4 Dropout time and trip time curves of the inverse time overcurrent protection, acc. to ANSI/IEEE SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 356 Technical Data 4.3 Inverse-Time Overcurrent Protection 51(N) Figure 4-5 Dropout time and trip time curves of the inverse time overcurrent protection, acc. to ANSI/IEEE SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 357 Technical Data 4.3 Inverse-Time Overcurrent Protection 51(N) Figure 4-6 Dropout time and trip time curve of the inverse time overcurrent protection, acc. to ANSI/IEEE SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 358: Directional Ground Overcurrent Protection 67N
Technical Data 4.4 Directional Ground Overcurrent Protection 67N Directional Ground Overcurrent Protection 67N Time Overcurrent Elements The same specifications and characteristics apply as for non-directional time overcurrent protection (see previous Sections). Determination of Direction Moreover, the following data apply to direction determination: For Ground Faults Polarization with zero sequence quantities 3V...
Page 359: Inrush Restraint
Technical Data 4.5 Inrush Restraint Inrush Restraint Controlled Functions Overcurrent elements 50-1, 50N-1, 51, 51N, 67-1, 67N-1 Setting Ranges / Increments Stabilization factor I 10 % to 45 % Increments 1 % Functional Limits Lower function limit phases for I = 1 A at least one phase current (50 Hz and 100 Hz) ≥...
Page 360: Dynamic Cold Load Pickup
Technical Data 4.6 Dynamic Cold Load Pickup Dynamic Cold Load Pickup Timed changeover of settings Controlled elements Non-directional time overcurrent protection (separate phase and ground settings) 50(N), 51(N) Initiation criteria Current criterion BkrClosed I MIN Interrogation of the circuit breaker position Binary input Time control 3 time elements...
Page 361: Voltage Protection
Technical Data 4.7 Voltage Protection 27, 59 Voltage Protection 27, 59 Setting ranges / increments Undervoltages 27-1, 27-2 Measured quantity used - Positive sequence system of the voltages - Smallest phase-to-phase voltage - Smallest phase-to-Ground voltage Connection of phase-to-Ground voltages: - Evaluation of phase-to-Ground voltages 10 V to 120 V Increments 1 V...
Page 362 Technical Data 4.7 Voltage Protection 27, 59 Times Pickup Times - Undervoltage 27-1, 27-2, 27-1 V , 27-2 V Approx. 50 ms - Overvoltage 59-1, 59-2 Approx. 50 ms - Overvoltage 59-1 V , 59-2 V , 59-1 V , 59-2 V Approx.
Page 363: Negative Sequence Protection
Technical Data 4.8 Negative Sequence Protection 46-1, 46-2 Negative Sequence Protection 46-1, 46-2 Setting Ranges / Increments Unbalanced load tripping element for I = 1 A 0.10 A to 3.00 A or ∞ (disabled) Increments 0.01 A 46-1,46-2 for I = 5 A 0.50 A to 15.00 A or ∞...
Page 364: Negative Sequence Protection 46-Toc
Technical Data 4.9 Negative Sequence Protection 46-TOC Negative Sequence Protection 46-TOC Setting Ranges / Increments Pickup value 46-TOC (I for I = 1 A 0.10 A to 2.00 A Increments 0.01 A for I = 5 A 0.50 A to 10.00 A Time Multiplier T (IEC) 0.05 s to 3.20 s or ∞...
Page 365 Technical Data 4.9 Negative Sequence Protection 46-TOC Trip Time Curves acc. to ANSI It can be selected one of the represented trip time characteristic curves in the figures 4-8 and 4-9 each on the right side of the figure. The trip times for I ≥...
Page 366 Technical Data 4.9 Negative Sequence Protection 46-TOC Dropout Time Curves with Disk Emulation acc. to ANSI Representation of the possible dropout time curves, see figure 4-8 and 4-9 each on the left side of the figure The dropout time constants apply to (I ) ≤...
Page 367 Technical Data 4.9 Negative Sequence Protection 46-TOC Figure 4-7 Trip time characteristics of the inverse time negative sequence element 46-TOC, acc. to IEC SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 368 Technical Data 4.9 Negative Sequence Protection 46-TOC Figure 4-8 Dropout time and trip time characteristics of the inverse time unbalanced load stage, acc. to ANSI SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 369 Technical Data 4.9 Negative Sequence Protection 46-TOC Figure 4-9 Dropout time and trip time characteristics of the inverse time unbalanced load stage, acc. to ANSI SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 370: Motor Starting Protection
Technical Data 4.10 Motor Starting Protection 48 4.10 Motor Starting Protection 48 Setting Ranges / Increments Startup current of the for I = 1 A 0.50 A to 16.00 A Increment 0.01 A motor I for I = 5 A 2.50 A to 80.00 A STARTUP Pickup threshold I for I...
Page 371: Motor Restart Inhibit
Technical Data 4.11 Motor Restart Inhibit 66 4.11 Motor Restart Inhibit 66 Setting Ranges / Increments Motor starting current relative to nominal motor current 1.1 to 10.0 Increment 0.1 Start Motor Nom. Nominal motor current for I = 1 A 0.20 A to 1.20 A Increment 0.01 A for I = 5 A 1.00 A to 6.00 A...
Page 372: Load Jam Protection
Technical Data 4.12 Load Jam Protection 4.12 Load Jam Protection Setting Ranges / Increments Tripping threshold for I = 1 A 0.50 A to 12.00 A Increments 0.01 A for I = 5 A 2.50 A to 60.00 A Alarm threshold for I = 1 A 0.50 A to 12.00 A Increments 0.01 A...
Page 373: Frequency Protection 81 O/U
Technical Data 4.13 Frequency Protection 81 O/U 4.13 Frequency Protection 81 O/U Setting ranges / increments Number of frequency elements 4; each can be set to f> or f< Pickup values f> or f< 40.00 Hz to 60.00 Hz Increments 0.01 Hz for f = 50 Hz Pickup values f>...
Page 374: Thermal Overload Protection
Technical Data 4.14 Thermal Overload Protection 49 4.14 Thermal Overload Protection 49 Setting Ranges / Increments K-Factor per IEC 60255-8 0.10 to 4.00 Increments 0.01 Time Constant τ 1.0 min to 999.9 min Increments 0.1 min Thermal Alarm Θ /Θ 50% to 100% of the trip excessive Increments 1 % Alarm...
Page 375 Technical Data 4.14 Thermal Overload Protection 49 Figure 4-10 Trip time curves for the thermal overload protection (49) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 376: Ground Fault Protection 64, 67N(S), 50N(S), 51N(S)
Technical Data 4.15 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) 4.15 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Displacement Voltage Element For all Types of Ground Faults Displacement voltage, measured V0 > 1.8 V to 200.0 V Increments 0.1 V Displacement voltage, calculated >...
Page 377 Technical Data 4.15 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Ground Fault Pickup for All Types of Ground Faults (Inverse Time Characteristic) User-defined characteristic (defined by a maximum of 20 value pairs of current and time delay in direction measurement method "cos phi and sin phi") Pickup current 51Ns for sensitive 1 A transformer 0.001 A to 1.400 A...
Page 378 Technical Data 4.15 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Direction Determination for all Types of Ground Fault with V0 ϕ / I0 ϕ Measurement Direction measurement and V measured - 3I and 3V calculated Measuring principle U0 / I0 phase angle measurement 50Ns-1 element Minimum voltage 50Ns-1 Vmin V0 measured...
Page 379: Breaker Failure Protection 50Bf
Technical Data 4.16 Breaker Failure Protection 50BF 4.16 Breaker Failure Protection 50BF Setting Ranges / Increments Pickup threshold 50-1 BF for I = 1 A 0.05 A to 20.00 A Increments 0.01 A for I = 5 A 0.25 A to 100.00 A Pickup threshold 50N-1 BF for I = 1 A 0.05 A to 20.00 A...
Page 380: Flexible Protection Functions
Technical Data 4.17 Flexible Protection Functions 4.17 Flexible Protection Functions Measured Values / Modes of Operation Three-phase I, 3I , I1, I2, I2/I1, V, 3V , V1, V2, P forward, P reverse, Q forward, Q reverse, cosϕ Single-phase I, I , V, V , P forward, P reverse, Q forward, Q reverse, cosϕ...
Page 381 Technical Data 4.17 Flexible Protection Functions Times Pickup times: Current, voltage (phase quantities) for 2 times the setting value approx. 30 ms for 10 times the setting value approx. 20 ms Current, voltage (symmetrical components) for 2 times the setting value approx.
Page 382 Technical Data 4.17 Flexible Protection Functions Influencing Variables for Pickup Values Auxiliary DC voltage in range 0.8 ≤ V ≤ 1.15 AuxNom Temperature in range –5 °C (41 °F) ≤ Θ ≤ 55 °C (131 °F) 0.5 %/10 K Frequency in range 0.95 ≤ f/f ≤...
Page 383: Temperature Detection
Technical Data 4.18 Temperature Detection 4.18 Temperature Detection Temperature Detectors Connectable RTD-boxes 1 or 2 Number of temperature detectors per RTD-box Max. 6 Measuring method Pt 100 Ω or Ni 100 Ω or Ni 120 Ω selectable 2 or 3 phase connection Mounting identification „Oil“...
Page 384 Technical Data 4.18 Temperature Detection Thresholds for Indications for each measuring point Stage 1 –50 °C to 250 °C (increment 1 °C) –58 °F to 482 °F (increment 1 °F) or ∞ (no message) Stage 2 –50 °C to 250 °C (increment 1 °C) –58 °F to 482 °F (increment 1 °F)
Page 385: User-Defined Functions (Cfc)
Technical Data 4.19 User-defined Functions (CFC) 4.19 User-defined Functions (CFC) Function Modules and Possible Assignments to Task Levels Function Module Explanation Task Level PLC1_ PLC_ SFS_ BEARB BEARB BEARB BEARB ABSVALUE Magnitude Calculation — — — Addition ALARM Alarm clock AND - Gate FLASH Blink block...
Page 386 Technical Data 4.19 User-defined Functions (CFC) Function Module Explanation Task Level PLC1_ PLC_ SFS_ BEARB BEARB BEARB BEARB Multiplication MV_GET_STATUS Decode status of a value MV_SET_STATUS Set status of a value NAND NAND - Gate Negator NOR - Gate OR - Gate REAL_TO_DINT Adaptor REAL_TO_INT...
Page 387 Technical Data 4.19 User-defined Functions (CFC) Device-specific Limits Description Limit Comment Maximum number of synchronous When the limit is exceeded, an error message is output by changes of chart inputs per task level the device. Consequently, the device starts monitoring. The red ERROR-LED lights up.
Page 388 Technical Data 4.19 User-defined Functions (CFC) Processing Times in TICKS Required by the Individual Elements Individual Element Number of TICKS Block, basic requirement Each input more than 3 inputs for generic modules Connection to an input signal Connection to an output signal Additional for each chart Arithmetic ABS_VALUE...
Page 389 Technical Data 4.19 User-defined Functions (CFC) Individual Element Number of TICKS Type converter BOOL_TO_DI BUILD_DI DI_TO_BOOL DM_DECODE DINT_TO_REAL DIST_DECODE UINT_TO_REAL REAL_TO_DINT REAL_TO_UINT Comparison COMPARE LOWER_SETPOINT UPPER_SETPOINT LIVE_ZERO ZERO_POINT Metered value COUNTER Time and clock pulse TIMER TIMER_LONG TIMER_SHORT ALARM FLASH Configurable in Matrix In addition to the defined preassignments, indications and measured values can be freely configured to buff- ers, preconfigurations can be removed.
Page 390: Additional Functions
Technical Data 4.20 Additional Functions 4.20 Additional Functions Operational measured values Currents in A (kA) primary and in A secondary or in % of I Positive Sequence Component I Negative Sequence Component I or 3I0 Range 10 % to 150 % I Tolerance 1,5 % of measured value, or 1 % I and 151 % to 200 % I...
Page 391 Technical Data 4.20 Additional Functions Range 0 mA to 1600 mA or 0 A to 8 A for I = 5 A Tolerance 3 % of measured value or 1 mA Temperature in %. Restart inhibit /Θ Θ L Trip Range 0 % to 400 % Tolerance...
Page 392 Technical Data 4.20 Additional Functions Fuse Failure Monitor Setting range of the displacement voltage 3U0 10 - 100 V above which voltage failure is detected Setting range of the ground current above which no 0.1 - 1 A for I = 1 A Bdmd voltage failure is assumed...
Page 393 Technical Data 4.20 Additional Functions Energy Counter Meter Values for Energy in kWh (MWh or GWh) and in kVARh (MVARh or GVARh) Wp, Wq (real and reactive energy) Range 28 bit or 0 to 2 68 435 455 decimal for IEC 60870-5-103 (VDEW protocol) 31 bit or 0 to 2 147 483 647 decimal for other protocols (other than VDEW) ≤...
Page 394 Technical Data 4.20 Additional Functions Commissioning Aids - Phase rotation test - Operational measured values - Circuit breaker test by means of control function - Creation of a test fault report - Creation of messages Clock Time synchronization Binary input Communication Modes of operation for time tracking Mode of operation...
Page 395: Breaker Control
Technical Data 4.21 Breaker Control 4.21 Breaker Control Number of Controlled Switching Devices Depends on the number of binary inputs and outputs available Interlocking Freely programmable interlocking Messages Feedback messages; closed, open, intermediate position Control Commands Single command / double command Switching Command to Circuit Breaker 1-, 1½...
Page 396: Dimensions
Technical Data 4.22 Dimensions 4.22 Dimensions 4.22.1 Panel Flush and Cubicle Mounting (Housing Size 1/6) Figure 4-11 Dimensional drawing of a 7SK80 for panel flush or cubicle mounting (housing size Note: An angle strip set (contains upper and lower mounting brackets) (Order-No. C73165-A63-D200-1) is necessary to install the device in a rack.
Page 397: Panel Surface Mounting (Housing Size 1/6)
Technical Data 4.22 Dimensions 4.22.2 Panel Surface Mounting (Housing Size 1/6) Figure 4-13 Dimensional drawing of a 7SK80 for panel surface mounting (housing size SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 398: Bottom View
Technical Data 4.22 Dimensions 4.22.3 Bottom view Figure 4-14 Bottom view of a 7SK80 (housing size ■ SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 399: Appendix
Appendix This appendix is primarily a reference for the experienced user. This section provides ordering information for the models of this device. Connection diagrams indicating the terminal connections of the models of this device are included. Following the general diagrams are diagrams that show the proper connections of the devices to primary equipment in many typical power system configurations.
Page 400: Ordering Information And Accessories
Appendix A.1 Ordering Information and Accessories Ordering Information and Accessories A.1.1 Ordering Information A.1.1.1 7SK80 V4.6 10 11 12 13 14 15 16 Supplemen- Multifunctional tary protection device with control – – Number of binary inputs and outputs Pos. 6 Housing 1/6 19”...
Page 401 IEC 61850, 100Mbit Ethernet electrical, double, RJ45 connector + L 0 R IEC 61850 100 Mbit Ethernet optical, double, LC connector duplex + L 0 S Converter Order number SIEMENS OLM 6GK1502–2CB10 for single ring SIEMENS OLM 6GK1502–3CB10 for twin ring The converter requires an operating voltage of 24 V DC.
Page 402 Appendix A.1 Ordering Information and Accessories Functions Pos. 15 Designation ANSI No. Description Basic function (included in all versions) — Control 50/51 Time overcurrent protection phase 50-1, 50-2, 50-3, 51 50N/51N Ground fault protection ground 50N-1, 50N-2, 50N-3, 50N(s)/51N( Ground fault protection 50Ns-1, 50Ns-2, 51Ns Thermal overload protection 74TC...
Page 403: Accessories
Appendix A.1 Ordering Information and Accessories A.1.2 Accessories Exchangeable interface modules Name Order No. RS232 C53207-A351-D641-1 RS485 C53207-A351-D642-1 FO 820 nm C53207-A351-D643-1 Profibus DP RS485 C53207-A351-D611-1 Profibus DP double ring C53207-A351-D613-1 Modbus RS485 C53207-A351-D621-1 Modbus 820 nm C53207-A351-D623-1 DNP 3.0 RS 485 C53207-A351-D631-1 DNP 3.0 820 nm C53207-A351-D633-1...
Page 404 Appendix A.1 Ordering Information and Accessories Battery Lithium battery 3 V/1 Ah, type CR 1/2 AA Order No. VARTA 6127 101 501 Terminals Voltage terminal block C or block E C53207-A406-D181-1 Voltage terminal block D (inverse print) C53207-A406-D182-1 Shield for voltage terminal C53207-A406-D191-1 Current terminal block 4xI C53207-A406-D185-1...
Page 405: Terminal Assignments
Appendix A.2 Terminal Assignments Terminal Assignments A.2.1 7SK80 — Housing for panel flush mounting and cubicle installation and for panel surface mounting 7SK801* Figure A-1 Block diagram 7SK801* SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 406 Appendix A.2 Terminal Assignments 7SK802* Figure A-2 Block diagram 7SK802* SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 407 Appendix A.2 Terminal Assignments 7SK803* Figure A-3 General diagram 7SK803* SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 408 Appendix A.2 Terminal Assignments 7SK804* Figure A-4 General diagram 7SK804* SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 409 Appendix A.2 Terminal Assignments 7SK805* Figure A-5 General diagram 7SK805*) *) The shielding of the connecting cable is connected directly to the shield cap. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 410 Appendix A.2 Terminal Assignments 7SK806* Figure A-6 General diagram 7SK806* *) The shielding of the connecting cable is connected directly to the shield cap. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 411: Connection Examples
Appendix A.3 Connection Examples Connection Examples Figure A-7 Current transformer connections to three current transformers and neutral rpoint current (ground current) (Holmgreen connection) – appropriate for all networks Figure A-8 Current transformer connections to two current transformers – only for isolated or resonant-grounded networks SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 412 Appendix A.3 Connection Examples Figure A-9 Current transformer connections to three current transformers, ground current from additional summation current transformer – preferably for effectively or low-resistance grounded networks Important: Grounding of the cable shield must be effected at the cable side Note: The switchover of the current polarity (address 201) also reverses the polarity of the current input IN! Figure A-10...
Page 413 Appendix A.3 Connection Examples Figure A-11 Current transformer connections to three current transformers - ground current from additional cable-type current transformer for sensitive ground fault detection Important: Grounding of the cable shield must be effected at the cable side Note: The switchover of the current polarity (address 201) also reverses the polarity of the current input INs! Figure A-12 Transformer connections to three current transformers and three voltage transformers (phase-...
Page 414 Appendix A.3 Connection Examples Figure A-13 Transformer connections to three current transformers and three voltage transformers - capacitive SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 415 Appendix A.3 Connection Examples Figure A-14 Transformer connections to three current transformers, two voltage transformers (phase-to-phase voltages) and broken delta winding (da-dn) – appropriate for all networks SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 416 Appendix A.3 Connection Examples Figure A-15 Current transformer connections to two current transformers and as open-delta connection the voltage transformer – for isolated or resonant-grounded networks when no directional ground protection is needed Figure A-16 Current transformer connections to three current transformers, two voltage transformers in open-deltaconnection, only for isolated or resonant-grounded networks;...
Page 417 Appendix A.3 Connection Examples Figure A-17 Transformer connections to three current transformers, cable-type current transformer and broken delta winding, maximum precision for sensitive ground fault detection Important: Grounding of the cable shield must be effected at the cable side For busbar-side grounding of the current transformers, the current polarity of the device is changed via address 0201.
Page 418 Appendix A.3 Connection Examples Figure A-18 Current transformer connections to two phase-current transformers and a ground-current transformer; the ground current is taken via the highly sensitive and sensitive ground input. Important! Grounding of the cable shield must be effected at the cable side For busbar-side grounding of the current transformers, the current polarity of the device is changed via address 0201.
Page 419 Appendix A.3 Connection Examples Figure A-19 Current transformer connections to two phase currents and two ground currents; IN/INs – ground current of the line, IN2 – ground current of the transformer starpoint Important! Grounding of the cable shield must be effected at the cable side For busbar-side grounding of the current transformers, the current polarity of the device is changed via address 0201.
Page 420 Appendix A.3 Connection Examples Figure A-21 Voltage transformer connections to two voltage transformers (phase-to-phase voltages) and broken delta winding (da-dn) – appropriate for all networks Figure A-22 Example for connection type "VAN, VBN, VCN" busbar-side voltage connection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 421 Appendix A.3 Connection Examples Figure A-23 Example for connection type "VAB, VBC, Vx" Figure A-24 Example for connection type "VAB, VBC" SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 422: Connection Examples For Rtd Box
Appendix A.3 Connection Examples Figure A-25 Example for connection type "VAB, VBC" with phase voltage connection as open-delta connection A.3.1 Connection Examples for RTD Box Figure A-26 Simplex operation with one RTD-Box, above: optical design (1FO); below: design with RS 485. Optional Ethernet via Port A (EN100–LC).
Page 423 Appendix A.3 Connection Examples Figure A-27 Half-duplex operation with two RTD-Boxes, above: optical design (2FOs); below: design with RS 485. Optional Ethernet via Port A (EN100–LC). Figure A-28 Half-duplex operation with one RTD-Box, above: optical design (2FOs); below: design with RS 485. Optional Ethernet via Port A (EN100–LC). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 424: Current Transformer Requirements
Appendix A.4 Current Transformer Requirements Current Transformer Requirements The requirements for phase current transformers are usually determined by the overcurrent time protection, particularly by the high-current element settings. Besides, there is a minimum requirement based on experi- ence. The recommendations are given according to the standard IEC 60044-1. The standards IEC 60044-6, BS 3938 and ANSI/IEEE C 57.13 are referred to for converting the requirement into the knee-point voltage and other transformer classes.
Page 425: Class Conversion
Appendix A.4 Current Transformer Requirements A.4.2 Class conversion Table A-1 Conversion into other classes British Standard BS 3938 ANSI/IEEE C 57.13, class C = 5 A (typical value) sNom IEC 60044-6 (transient response), class K≈ 1 ≈ K Calculation See ChapterA.4.1 Accuracy limiting factors with: K ≈...
Page 426: Cable Core Balance Current Transformer
Appendix A.4 Current Transformer Requirements A.4.3 Cable core balance current transformer General The requirements to the cable core balance current transformer are determined by the function „sensitive ground fault detection“. The recommendations are given according to the standard IEC 60044-1. Requirements Transformation ratio, typical 60 / 1...
Page 427: Default Settings
Appendix A.5 Default Settings Default Settings When the device leaves the factory, many LED indications, binary inputs, binary outputs and function keys are already preset. They are summarized in the following table. A.5.1 LEDs Table A-3 7SK801* or 7SK805* LEDs Default function Function No.
Page 428: Binary Input
Appendix A.5 Default Settings Table A-6 7SK804* or 7SK806* LEDs Default function Function No. Description LED1 Relay TRIP Relay GENERAL TRIP command LED2 50/51 Ph A PU 1762 50/51 Phase A picked up LED3 50/51 Ph B PU 1763 50/51 Phase B picked up LED4 50/51 Ph C PU 1764...
Page 429: Binary Output
Appendix A.5 Default Settings A.5.3 Binary Output Table A-9 Output Relay Presettings for All Devices and Ordering Variants Binary Output Default function Function No. Description Relay TRIP Relay GENERAL TRIP command 52Breaker 52 Breaker 52Breaker 52 Breaker 52Breaker 52 Breaker Failure Σ...
Page 430: Default Display
Appendix A.5 Default Settings A.5.5 Default Display A number of pre-defined measured value pages are available depending on the device type. The start page of the default display appearing after startup of the device can be selected in the device data via parameter 640 Start image DD.
Page 431 Appendix A.5 Default Settings Figure A-30 Default display of the 7SK80 for models with V with extended measured values Figure A-31 Default display of the 7SK80 for models without V and extended measured values SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 432 Appendix A.5 Default Settings Figure A-32 Default display of the 7SK80 for models without V with extended measured values Spontaneous Fault Display After a fault has occurred, the most important fault data are automatically displayed after general device pickup in the order shown in the picture below. Figure A-33 Representation of spontaneous messages on the device display SIPROTEC, 7SK80, Manual...
Page 433: Protocol-Dependent Functions
Appendix A.6 Protocol-dependent Functions Protocol-dependent Functions Protocol → IEC 60870-5-103, IEC 60870-5-103, IEC 61850 Ethernet Profibus DP DNP3.0 single redundant (EN 100) Modbus Function ↓ ASCII/RTU Operational measured values Metered values Fault recording Remote protection setting User-defined indications and switching objects Time synchronization Messages with time stamp...
Page 434: Functional Scope
Appendix A.7 Functional Scope Functional Scope Addr. Parameter Setting Options Default Setting Comments Grp Chge OPTION Disabled Disabled Setting Group Change Option Enabled OSC. FAULT REC. Disabled Enabled Oscillographic Fault Records Enabled Charac. Phase Disabled Definite Time 50/51 Definite Time TOC IEC TOC ANSI Charac.
Page 435 Appendix A.7 Functional Scope Addr. Parameter Setting Options Default Setting Comments 74 Trip Ct Supv Disabled Disabled 74TC Trip Circuit Supervision 2 Binary Inputs 1 Binary Input RTD INPUT Disabled Disabled External Temperature Input Enabled RTD CONNECTION 6 RTD simplex 6 RTD HDX Ext.
Page 436: Settings
Appendix A.8 Settings Settings Addresses which have an appended "A" can only be changed with DIGSI, under "Display Additional Settings". The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec- ondary nominal current of the current transformer. Addr.
Page 437 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments P.U. THRESHOLD 15 .. 100 % 20 % Pickup Threshold P.U. THRESHOLD 2.0 .. 260.0 V 110.0 V Pickup Threshold T TRIP DELAY 0.00 .. 3600.00 sec 1.00 sec Trip Time Delay T PICKUP DELAY 0.00 ..
Page 438 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments Volt.trans.A:C1 P.System Data 1 1.0 .. 100.0 pF 10.0 pF Voltage transducer A: Capacity Volt.trans.A:C2 P.System Data 1 250 .. 10000 pF 2200 pF Voltage transducer A: Capacity Volt.trans.B:C1 P.System Data 1 1.0 ..
Page 439 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments Start image DD Device, General image 1 image 1 Start image Default Display image 2 image 3 image 4 image 5 image 6 1101 FullScaleVolt. P.System Data 2 0.10 .. 800.00 kV 20.00 kV Measurem:FullScaleVolt- age(Equipm.rating)
Page 440 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 1304 50N-1 PICKUP 50/51 Overcur. 0.05 .. 35.00 A; ∞ 0.20 A 50N-1 Pickup 0.25 .. 175.00 A; ∞ 1.00 A 1305 50N-1 DELAY 50/51 Overcur. 0.00 .. 60.00 sec; ∞ 0.50 sec 50N-1 Time Delay 1307...
Page 441 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 1613A MANUAL CLOSE 67 Direct. O/C 67N-2 instant. 67N-2 instant. Manual Close Mode 67N-1 instant. 67N-TOC instant Inactive 1614A 67N-2 active 67 Direct. O/C always always 67N-2 active 1616 67N Direction 67 Direct.
Page 442 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 2105 67Nc-TOC PICKUP ColdLoadPickup 0.05 .. 4.00 A 1.00 A 67Nc-TOC Pickup 0.25 .. 20.00 A 5.00 A 2106 67Nc-TOC T-DIAL ColdLoadPickup 0.05 .. 3.20 sec; ∞ 0.50 sec 67Nc-TOC Time Dial 2107 67Nc-TOC T-DIAL...
Page 443 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 3123 RELEASE DIRECT. Sens. Gnd Fault 0.001 .. 1.200 A 0.010 A Release directional element 0.005 .. 6.000 A 0.050 A 3123 RELEASE DIRECT. Sens. Gnd Fault 0.05 .. 30.00 A 0.50 A Release directional element 0.25 ..
Page 444 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 4207A Kτ-FACTOR 49 Th.Overload 1.0 .. 10.0 Kt-FACTOR when motor stops 4208A T EMERGENCY 49 Th.Overload 10 .. 15000 sec 100 sec Emergency time 4209 49 TEMP. RISE I 49 Th.Overload 40 ..
Page 445 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 5112 27-2 DELAY 27/59 O/U Volt. 0.00 .. 100.00 sec; ∞ 0.50 sec 27-2 Time Delay 5113A 27-1 DOUT RATIO 27/59 O/U Volt. 1.01 .. 3.00 1.20 27-1 Dropout Ratio 5114A 27-2 DOUT RATIO 27/59 O/U Volt.
Page 446 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 7005 TRIP-Timer 50BF BkrFailure 0.06 .. 60.00 sec; ∞ 0.25 sec TRIP-Timer 7006 50BF PICKUP 50BF BkrFailure 0.05 .. 20.00 A 0.10 A 50BF Pickup current threshold 0.25 .. 100.00 A 0.50 A 7007 50BF PICKUP IE>...
Page 447 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 9011A RTD 1 TYPE RTD-Box Not connected Pt 100 Ω RTD 1: Type Pt 100 Ω Ni 120 Ω Ni 100 Ω 9012A RTD 1 LOCATION RTD-Box RTD 1: Location Ambient Winding Bearing...
Page 448 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 9051A RTD 5 TYPE RTD-Box Not connected Not connected RTD 5: Type Pt 100 Ω Ni 120 Ω Ni 100 Ω 9052A RTD 5 LOCATION RTD-Box Other RTD 5: Location Ambient Winding Bearing...
Page 449 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 9091A RTD 9 TYPE RTD-Box Not connected Not connected RTD 9: Type Pt 100 Ω Ni 120 Ω Ni 100 Ω 9092A RTD 9 LOCATION RTD-Box Other RTD 9: Location Ambient Winding Bearing...
Page 450 Appendix A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 9130 Module Port RTD-Box Port B Port B RS485 module port for the RTD 9131 Module Port RTD-Box Port B Port B RS485 module port for the RTD SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 451: Information List
Appendix A.9 Information List Information List Indications for IEC 60 870-5-103 are always reported ON / OFF if they are subject to general interrogation for IEC 60 870-5-103. If not, they are reported only as ON. New user-defined indications or such newly allocated to IEC 60 870-5-103 are set to ON / OFF and subjected to general interrogation if the information type is not a spontaneous event („.._Ev“).
Page 452 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio Controlmode REMOTE (ModeR- Cntrl Authority IntSP EMOTE) Control Authority (Cntrl Auth) Cntrl Authority IntSP Controlmode LOCAL (ModeLO- Cntrl Authority IntSP CAL) 52 Breaker (52Breaker) Control Device CF_D 52 Breaker (52Breaker)
Page 453 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio >Setting Group Select Bit 0 (>Set Change Group LED BI Group Bit0) >Setting Group Select Bit 1 (>Set Change Group LED BI Group Bit1) 009.0100 Failure EN100 Modul (Failure...
Page 454 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio Failure: Phase Sequence (Fail Measurem.Superv Ph. Seq.) Failure: Phase Sequence Current Measurem.Superv (Fail Ph. Seq. I) Failure: Phase Sequence Voltage Measurem.Superv (Fail Ph. Seq. V) Failure: Battery empty (Fail Bat- Device, General tery)
Page 455 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 235.2125 Function $00 TRIP Delay Time Out ($00 Time Out) 235.2126 Function $00 TRIP ($00 TRIP) 235.2128 Function $00 has invalid settings ($00 inval.set) 236.2127 BLOCK Flexible Function (BLK.
Page 456 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio >Idmd MIN/MAX Buffer Reset Min/Max meter LED BI (>Idmd MiMaReset) >Pdmd MIN/MAX Buffer Reset Min/Max meter LED BI (>Pdmd MiMaReset) >Qdmd MIN/MAX Buffer Reset Min/Max meter LED BI (>Qdmd MiMaReset)
Page 457 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 1211 50Ns/67Ns is OFF (50Ns/67Ns Sens. Gnd Fault OFF) 1212 50Ns/67Ns is ACTIVE Sens. Gnd Fault (50Ns/67Ns ACT) 1215 64 displacement voltage pick up Sens.
Page 458 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 1471 50BF TRIP (50BF TRIP) 50BF BkrFailure 1480 50BF (internal) TRIP (50BF int 50BF BkrFailure TRIP) 1481 50BF (external) TRIP (50BF ext 50BF BkrFailure TRIP) 1503...
Page 459 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 1758 50N/51N is ACTIVE (50N/51N 50/51 Overcur. ACT) 1761 50(N)/51(N) O/C PICKUP 50/51 Overcur. (50(N)/51(N) PU) 1762 50/51 Phase A picked up (50/51 50/51 Overcur.
Page 460 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 1843 Cross blk: PhX blocked PhY 50/51 Overcur. (INRUSH X-BLK) 1851 50-1 BLOCKED (50-1 50/51 Overcur. BLOCKED) 1852 50-2 BLOCKED (50-2 50/51 Overcur. BLOCKED) 1853 50N-1 BLOCKED (50N-1...
Page 461 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 2683 67N-1 TRIP (67N-1 TRIP) 67 Direct. O/C 2684 67N-TOC picked up (67N- 67 Direct. O/C TOCPickedup) 2685 67N-TOC Time Out (67N-TOC 67 Direct.
Page 462 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 5166 46-TOC picked up (46-TOC 46 Negative Seq pickedup) 5170 46 TRIP (46 TRIP) 46 Negative Seq 5171 46 Disk emulation picked up (46 46 Negative Seq Dsk pickedup) 5203...
Page 463 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 6533 27-1 Undervoltage picked up 27/59 O/U Volt. (27-1 picked up) 6534 27-1 Undervoltage PICKUP 27/59 O/U Volt. w/curr. superv (27-1 PU CS) 6537 27-2 Undervoltage picked up 27/59 O/U Volt.
Page 464 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 6865 74TC Failure Trip Circuit (74TC 74TC TripCirc. Trip cir.) 7551 50-1 InRush picked up (50-1 In- 50/51 Overcur. RushPU) 7552 50N-1 InRush picked up (50N-1 50/51 Overcur.
Page 465 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 10032 Total Motor Stopped Time (Motor Mot.Statistics Stop.Time) 10033 Motor Percent Running Time Mot.Statistics (Perc.Run.Time) 10034 50-3 BLOCKED (50-3 50/51 Overcur. BLOCKED) 10035 50N-3 BLOCKED (50N-3 50/51 Overcur.
Page 466 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 14143 RTD 4 Temperature stage 2 RTD-Box picked up (RTD 4 St.2 p.up) 14151 Fail: RTD 5 (broken wire/shorted) RTD-Box (Fail: RTD 5) 14152 RTD 5 Temperature stage 1 RTD-Box...
Page 467 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 16005 Threshold Sum Curr. Exponent. SetPoint(Stat) exceeded (Threshold ΣI^x>) 16006 Residual Endurance Phase A Statistics (Resid.Endu. A=) 16007 Residual Endurance Phase B Statistics (Resid.Endu.
Page 468: Group Alarms
Appendix A.10 Group Alarms A.10 Group Alarms Description Function No. Description Error Sum Alarm Fail Battery I/O-Board error 10080 Error Ext I/O 10081 Error Ethernet 10082 Error Terminal 10083 Error Basic I/O Error Offset Alarm NO calibr Alarm Sum Event Failure Σ...
Page 469: Measured Values
Appendix A.11 Measured Values A.11 Measured Values Description Function IEC 60870-5-103 Configurable in Matrix Number of TRIPs= (#of TRIPs=) Statistics Operating hours greater than (OpHour>) SetPoint(Stat) Ia (Ia =) Measurement Ib (Ib =) Measurement Ic (Ic =) Measurement In (In =) Measurement I1 (positive sequence) (I1 =) Measurement...
Page 470 Appendix A.11 Measured Values Description Function IEC 60870-5-103 Configurable in Matrix I B Demand Maximum (IBdmdMax) Min/Max meter I C Demand Minimum (ICdmdMin) Min/Max meter I C Demand Maximum (ICdmdMax) Min/Max meter I1 (positive sequence) Demand Minimum Min/Max meter (I1dmdMin) I1 (positive sequence) Demand Maximum Min/Max meter (I1dmdMax)
Page 471 Appendix A.11 Measured Values Description Function IEC 60870-5-103 Configurable in Matrix Pulsed Energy Wq (reactive) (Wq(puls)) Energy Power Factor (PF =) Measurement Wp Forward (WpForward) Energy Wq Forward (WqForward) Energy Wp Reverse (WpReverse) Energy Wq Reverse (WqReverse) Energy I A demand (Ia dmd=) Demand meter I B demand (Ib dmd=) Demand meter...
Page 472 Appendix A.11 Measured Values SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 473: Literature
Literature SIPROTEC 4 System Description; E50417-H1100-C151-B1 SIPROTEC DIGSI, Start UP; E50417-G1100-C152-A3 DIGSI CFC, Manual; E50417-H1100-C098-A9 SIPROTEC SIGRA 4, Manual; E50417-H1176-C070-A4 Additional description or the protection of explosion-protected motors of protection type increased safety "e"; C53000–B1174–C157 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 474 Literature SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 475: Glossary
Glossary Battery The buffer battery ensures that specified data areas, flags, timers and counters are retained retentively. Bay controllers Bay controllers are devices with control and monitoring functions without protective functions. Bit pattern indication Bit pattern indication is a processing function by means of which items of digital process information applying across several inputs can be detected together in parallel and processed further.
Page 476 Glossary Combination matrix DIGSI V4.6 and higher allows up to 32 compatible SIPROTEC 4 devices to communicate with each other in an inter-relay communication network (IRC). The combination matrix defines which devices exchange which in- formation. Communication branch A communications branch corresponds to the configuration of 1 to n users which communicate by means of a common bus.
Page 477 Glossary Double command Double commands are process outputs which indicate 4 process states at 2 outputs: 2 defined (for example ON/OFF) and 2 undefined states (for example intermediate positions) Double-point indication Double-point indications are items of process information which indicate 4 process states at 2 inputs: 2 defined (for example ON/OFF) and 2 undefined states (for example intermediate positions).
Page 478 Glossary ExMV External metered value via an ETHERNET connection, device-specific ExSI External single-point indication via an ETHERNET connection, device-specific → Single-point indication ExSI_F External single point indication via an ETHERNET connection, device-specific, → Fleeting indication, → Single- point indication Field devices Generic term for all devices assigned to the field level: Protection devices, combination devices, bay control- lers.
Page 479 Glossary Grounding Grounding means that a conductive part is to connect via a grounding system to → ground. Grounding Grounding is the total of all means and measured used for grounding. Hierarchy level Within a structure with higher-level and lower-level objects a hierarchy level is a container of equivalent objects. HV field description The HV project description file contains details of fields which exist in a ModPara project.
Page 480 Glossary Initialization string An initialization string comprises a range of modem-specific commands. These are transmitted to the modem within the framework of modem initialization. The commands can, for example, force specific settings for the modem. Inter relay communication → IRC combination IRC combination Inter Relay Communication, IRC, is used for directly exchanging process information between SIPROTEC 4 devices.
Page 481 Glossary Master Masters may send data to other users and request data from other users. DIGSI operates as a master. Metered value Metered values are a processing function with which the total number of discrete similar events (counting pulses) is determined for a period, usually as an integrated value. In power supply companies the electrical work is usually recorded as a metered value (energy purchase/supply, energy transportation).
Page 482 Glossary Object properties Each object has properties. These might be general properties that are common to several objects. An object can also have specific properties. Off-line In offline mode a link with the SIPROTEC 4 device is not necessary. You work with data which are stored in files. OI_F Output indication fleeting →...
Page 483 Glossary Protection devices All devices with a protective function and no control display. Reorganizing Frequent addition and deletion of objects creates memory areas that can no longer be used. By cleaning up projects, you can release these memory areas. However, a clean up also reassigns the VD addresses. As a consequence, all SIPROTEC 4 devices need to be reinitialized.
Page 484 Glossary SICAM WinCC The SICAM WinCC operator control and monitoring system displays the condition of your network graphically, visualizes alarms and indications, archives the network data, allows to intervene manually in the process and manages the system rights of the individual employee. Single command Single commands are process outputs which indicate 2 process states (for example, ON/OFF) at one output.
Page 485 Glossary Tree view The left pane of the project window displays the names and symbols of all containers of a project in the form of a folder tree. This area is called the tree view. TxTap → Transformer Tap Indication User address A user address comprises the name of the station, the national code, the area code and the user-specific phone number.
Page 486 Glossary SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...
Page 487: Index
Index Index 46-1, 46-2 112 DC voltage 335 Definite-Time Overcurrent Protection 50 (N) 345 Design 344 Determination of Ground-faulted Phase 179, 185 Direction Check with Load Current 325 Directional Overcurrent Protection Blocking by FFM 86 AC voltage 335 Directional Time Overcurrent Protection 67N 358 Ambient temperature 148 Directional, inverse-time overcurrent protection 84 Analog inputs 334...
Page 488 Index Direction Determination for cos-ϕ/ sin-ϕ 180, 194 Logic for cos-ϕ/ sin-ϕ 182 Negative Sequence Protection 46-1, 46-2 363 Logic for U0/10-ϕ 187 Negative Sequence Protection 46-TOC 364 Tripping Range for U0/10-ϕ 186 Non-interlocked Switching 274 Voltage Element for cos-ϕ/ sin-ϕ 178 Voltage Element for U0/10-ϕ...
Page 489 Index Temperature Detection 383 Temperature Detectors 383 Temperature Detectors at the I/O 2 Extension Module Temperature Detectors with Direct Connection 383 Temperatures 343 Terminal assignment 405 Terminating the Trip Signal 241 Termination 309 Test: system interface 313 Test: Voltage transformer miniature circuit breaker (VT mcb) 324 Thermal Overload Protection 49 374 Thermal replica 147...
Page 490 Index SIPROTEC, 7SK80, Manual E50417-G1140-C344-A4, Release date 08.2010...

Siemens SIPROTEC 7SK80 Manual

1 Introduction

2 Functions

3 Mounting and Commissioning

4 Technical Data

Appendix

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Summary of Contents for Siemens SIPROTEC 7SK80