Page 1 Reyrolle Protection Devices 7SR242 Duobias Transformer Protection Relay Answers for energy.
Page 3 Contents Technical Manual Chapters 1. Description of Operation 2. Settings, Configuration & Instruments 3. Performance Specification 4. Data Communications 5. Installation 6. Commissioning and Maintenance 7. Applications Guide...
Page 5 Software Revision History 2015/11 2662H85001 R8b-7c EN100+ compatibility. Additional ‘46IT’ and ‘51’ element time multiplier steps incorporated. 2013/01 2662H85001 R7c-7b Revised file handling during shutdown 2012/08 2662H85001 R7b-7a Addition of optional IEC 61850 communication protocol and Ethernet. (Requires hardware Compatible with H/W CC 2010/02 2662H80001 R4c-3 Revisions to: VT ratio settings, 87BD 1st bias slope limit setting incre-...
Page 6 siemens.com/energy...
Page 7: Description Of Operation
Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
Page 8 Chapter 1) 7SR242 Duobias Description Of Operation ©2015 Siemens Protection Devices Limited Chapter 1 Page 2 of 60...
Page 9: Table Of Contents
Chapter 1) 7SR242 Duobias Description Of Operation Contents Section 1: Introduction ........................7 Current Transformer Circuits......................7 External Resistors ........................7 Fibre Optic Communication ......................7 Front Cover ..........................7 Section 2: Hardware Description....................15 2.1 General ..........................15 2.2 Case ..........................15 2.3 Front Cover ........................
Page 10 Chapter 1) 7SR242 Duobias Description Of Operation 5.4 Over Fluxing Detector (81HBL5) ..................51 5.5 Demand ..........................51 Section 6: Other Features ....................... 53 6.1 Data Communications ......................53 6.2 IEC 61850 Communications ....................53 6.3 Maintenance ........................54 6.3.1 Output Matrix Test ....................
Page 11 Chapter 1) 7SR242 Duobias Description Of Operation List of Figures Figure 1-1 Function Diagram: 7SR242n-2aAnn-0AA0 Relay ............10 Figure 1-2 Function Diagram: 7SR242n-2aAnn-0BA0 Relay ............11 Figure 1-3 Function Diagram: 7SR242n-2aAnn-0CA0 Relay ............12 Figure 1-4 Connection Diagram: 7SR242 Relay ................13 Figure 2-1 7SR24 with 3 + 16 LEDs in E8 Case ................
Page 12 Chapter 1) 7SR242 Duobias Description Of Operation Symbols and Nomenclature The following notational and formatting conventions are used within the remainder of this document: Setting Menu Location MAIN MENU>SUB-MENU Setting: Elem name -Setting Setting value: value Alternatives: [1st] [2nd] [3rd] ©2015 Siemens Protection Devices Limited...
Page 13: Section 1: Introduction
Chapter 1) 7SR242 Duobias Description Of Operation Section 1: Introduction This manual is applicable to the following relays: 7SR242 Multi-Function 2-Winding Transformer Protection Relay The 7SR242 relay integrates the protection and control elements required to provide a complete transformer protection.
Page 14: Table 1-1: 7Sr242 Ordering Options
Chapter 1) 7SR242 Duobias Description Of Operation Table 1-1: 7SR242 Ordering Options DUOBIAS-M 7 S R 2 4 2 | | | Multifunctional 2 winding | | | transformer differential Protection Product protection Transformer Relay Type Differential (2 winding) Case I/O and Fascia...
Page 15 Chapter 1) 7SR242 Duobias Description Of Operation DUOBIAS-M 7 S R 2 4 2 Option C: Standard version - plus (continued from previous page) - 24 Overfluxing - 27/59 Under/overvoltage - 59N Neutral voltage displacement - 81 Under/overfrequency - 37/37G...
Page 16: Figure 1-1 Function Diagram: 7Sr242N-2Aann-0Aa0 Relay
Chapter 1) 7SR242 Duobias Description Of Operation Figure 1-1 Function Diagram: 7SR242n-2aAnn-0AA0 Relay ©2015 Siemens Protection Devices Limited Chapter 1 Page 10 of 60...
Page 17: Figure 1-2 Function Diagram: 7Sr242N-2Aann-0Ba0 Relay
Chapter 1) 7SR242 Duobias Description Of Operation 7SR242n-2aAn1-0BA0 W1-Ia (x2) BF-1 (x2) (x2) HBL2 HBL5 W1-Ib (x2) BF-1 (x2) (x2) HBL2 HBL5 W1-Ic (x2) BF-1 (x2) (x2) HBL2 HBL5 (x2) (x2) (x2) (x4) BF-1 (x2) (x2) (x4) Ig-1 Each function element can be assigned to W1 or W2 CT inputs.
Page 18: Figure 1-3 Function Diagram: 7Sr242N-2Aann-0Ca0 Relay
Chapter 1) 7SR242 Duobias Description Of Operation Figure 1-3 Function Diagram: 7SR242n-2aAnn-0CA0 Relay ©2015 Siemens Protection Devices Limited Chapter 1 Page 12 of 60...
Page 19: Figure 1-4 Connection Diagram: 7Sr242 Relay
Chapter 1) 7SR242 Duobias Description Of Operation Figure 1-4 Connection Diagram: 7SR242 Relay ©2015 Siemens Protection Devices Limited Chapter 1 Page 13 of 60...
Page 20 Chapter 1) 7SR242 Duobias Description Of Operation ©2015 Siemens Protection Devices Limited Chapter 1 Page 14 of 60...
Page 21: Section 2: Hardware Description
Chapter 1) 7SR242 Duobias Description Of Operation Section 2: Hardware Description General The structure of the relay is based upon the Multi-function hardware platform. The relays are supplied in either size E8, E10 or E12 cases (where 1 x E = width of approx. 26mm). The hardware design provides commonality between products and components across the 7SR2 range of relays.
Page 22: Front Cover
Chapter 1) 7SR242 Duobias Description Of Operation Front Cover With the transparent front cover in place the user only has access to the and TEST/RESET buttons, allowing all areas of the menu system to be viewed, but preventing setting changes and control actions. The only ‘action’...
Page 23 Chapter 1) 7SR242 Duobias Description Of Operation Relay Information Above the LCD three labels are provided, these provide the following information: 1) Product name and order code. 2) Nominal current rating, rated frequency, voltage rating, auxiliary dc supply rating, binary input supply rating, configuration and serial number.
Page 24 Chapter 1) 7SR242 Duobias Description Of Operation ‘TRIP’ LED This red LED is steadily illuminated to indicate that a user selectable function has operated to trip the circuit breaker. Functions are assigned to the ‘Trip’ LED using the OUTPUT CONFIG>Trip Contacts setting.
Page 25: Current Inputs
Chapter 1) 7SR242 Duobias Description Of Operation Current Inputs In total eight current inputs are provided on the Analogue Input modules. Terminals are available for both 1A and 5A inputs. CT ratios are input by the user in the CT/VT CONFIG menu.
Page 26: Binary Outputs (Output Relays)
Chapter 1) 7SR242 Duobias Description Of Operation Binary outputs (Output Relays) Relays are fitted with 6 or 14 binary outputs. All outputs are fully user configurable and can be programmed to operate from any or all of the available functions.
Page 27: Virtual Input/Outputs
Chapter 1) 7SR242 Duobias Description Of Operation Figure 2-3 Binary Output Logic 2.10 Virtual Input/Outputs The relays have 16 virtual input/outputs, these are internal logic states. Virtual I/O is assigned in the same way as physical Binary Inputs and Binary Outputs. Virtual I/O is mapped from within the INPUT CONFIG > INPUT MATRIX and OUTPUT CONFIG >...
Page 28: Self Monitoring
Chapter 1) 7SR242 Duobias Description Of Operation 2.11 Self Monitoring The relay incorporates a number of self-monitoring features. Each of these features can initiate a controlled reset recovery sequence. Supervision includes a power supply watchdog, code execution watchdog, memory checks by checksum and processor/ADC health checks.
Page 29: Section 3: Protection Functions
Chapter 1) 7SR242 Duobias Description Of Operation Section 3: Protection Functions Current Protection: Differential Protection Comprises both biased differential and high-set differential elements. The fundamental frequency current is measured with the line CT inputs. These line currents are both multiplied and vector corrected before being applied to the current differential elements.
Page 30: Overall Biased Differential (87Bd)
Chapter 1) 7SR242 Duobias Description Of Operation 3.1.2 Overall Biased Differential (87BD) Figure 3-1 Biased Differential Characteristic Figure 3.1-1 illustrates the biased differential characteristic. Within the relay the fundamental frequency RMS line currents are modified by the ICT Multiplier and ICT Connection settings (see 3.1.1) before being applied to the biased differential elements.
Page 31: Figure 3-2 Functional Diagram For Biased Current Differential Protection
Chapter 1) 7SR242 Duobias Description Of Operation Figure 3-2 Functional Diagram for Biased Current Differential Protection ©2015 Siemens Protection Devices Limited Chapter 1 Page 25 of 60...
Page 32: 87Hs
Chapter 1) 7SR242 Duobias Description Of Operation 3.1.3 87HS Figure 3-3 Differential Highset Characteristic Figure 3.1-3 illustrates the differential highset characteristic. Within the relay the fundamental frequency RMS line currents are modified by the ICT Multiplier and ICT Connection settings (see 3.1.1) before being applied to the differential highset elements.
Page 33: Figure 3-4 Logic Diagram: High Set Current Differential Protection
Chapter 1) 7SR242 Duobias Description Of Operation Figure 3-4 Logic Diagram: High Set Current Differential Protection ©2015 Siemens Protection Devices Limited Chapter 1 Page 27 of 60...
Page 34: Current Protection: Phase Overcurrent (51, 50)
Chapter 1) 7SR242 Duobias Description Of Operation Current Protection: Phase Overcurrent (51, 50) The optional phase overcurrent elements have a common setting to measure either fundamental frequency RMS or True RMS current: True RMS current: 51/50 Measurement = RMS Fundamental Frequency RMS current: 51/50 Measurement = Fundamental 3.2.1 Instantaneous Overcurrent Protection (50)
Page 35: Time Delayed Overcurrent Protection (51)
Chapter 1) 7SR242 Duobias Description Of Operation 3.2.2 Time Delayed Overcurrent Protection (51) Optionally two time delayed overcurrent elements are provided, each can be selected to either winding 1 or winding 2. 51-n Setting sets the pick-up current level. A number of shaped characteristics are provided. An inverse definite minimum time (IDMT) characteristic is selected from IEC, ANSI or user defined curves using 51-n Char.
Page 36: Current Protection: Derived Earth Fault (50N, 51N)
Chapter 1) 7SR242 Duobias Description Of Operation Current Protection: Derived Earth Fault (50N, 51N) The earth current is derived by calculating the sum of the measured line currents. These optional elements utilise RMS current values of the fundamental frequency (50 or 60Hz).
Page 37: Time Delayed Derived Earth Fault Protection (51N)
Chapter 1) 7SR242 Duobias Description Of Operation 3.3.2 Time Delayed Derived Earth Fault Protection (51N) Optionally two time delayed derived earth fault elements are provided, each can be selected to either winding 1 or winding 2. 51N-n Setting sets the pick-up current level.
Page 38: Current Protection: Measured Earth Fault (50G, 51G)
Chapter 1) 7SR242 Duobias Description Of Operation Current Protection: Measured Earth Fault (50G, 51G) The earth current is measured directly via dedicated current analogue inputs. These optional elements utilise either RMS or Fundamental current values as defined by the 51G/50G Measurement setting (MEASURED E/F menu).
Page 39: Time Delayed Measured Earth Fault Protection (51G)
Chapter 1) 7SR242 Duobias Description Of Operation 3.4.2 Time Delayed Measured Earth Fault Protection (51G) Optionally two time delayed measured earth fault elements are provided, each can be selected to either winding 1 or winding 2. 51G-n Setting sets the pick-up current level.
Page 40: Current Protection: High Impedance Restricted Earth Fault (64H)
Chapter 1) 7SR242 Duobias Description Of Operation Current Protection: High Impedance Restricted Earth Fault (64H) Two high impedance restricted earth fault elements are provided, one for each transformer winding The relay utilises fundamental current measurement values for this function. The single phase current input is derived from the residual output of line/neutral CTs connected in parallel. An external stabilising resistor must be connected in series with this input to ensure that this element provides a high impedance path.
Page 41: Open Circuit (46Bc)
Chapter 1) 7SR242 Duobias Description Of Operation Open Circuit (46BC) Optionally two open circuit elements are provided, each can be selected to either winding 1 or winding 2. The element calculates the ratio of NPS to PPS currents. Where the NPS:PPS current ratio is above 46BC Setting an output is given after the 46BC Delay.
Page 42: Current Protection: Negative Phase Sequence Overcurrent (46Nps)
Chapter 1) 7SR242 Duobias Description Of Operation Current Protection: Negative Phase Sequence Overcurrent (46NPS) Optionally four NPS current elements are provided – 2 x 46IT and 2 x 46DT. Each element can be selected to either winding 1 or winding 2.
Page 43: Current Protection: Under-Current (37, 37G)
Chapter 1) 7SR242 Duobias Description Of Operation Current Protection: Under-Current (37, 37G) Optionally two under-current elements are provided for both line and measured earth current, each can be selected to either winding 1 or winding 2. Each phase has an independent level detector and current-timing element. 37-n Setting sets the pick-up current.
Page 44: Current Protection: Thermal Overload (49)
Chapter 1) 7SR242 Duobias Description Of Operation Current Protection: Thermal Overload (49) Optionally a phase segregated thermal overload element is provided, this can be selected to either winding 1 or winding 2. The thermal state is calculated using the measured True RMS current.
Page 45: Figure 3-15 Logic Diagram: Thermal Overload Protection (49)
Chapter 1) 7SR242 Duobias Description Of Operation Figure 3-15 Logic Diagram: Thermal Overload Protection (49) ©2015 Siemens Protection Devices Limited Chapter 1 Page 39 of 60...
Page 46: Voltage Protection: Over Fluxing (24)
Chapter 1) 7SR242 Duobias Description Of Operation 3.10 Voltage Protection: Over Fluxing (24) Optionally, three over fluxing elements are provided – 2 x 24DT and 1 x 24IT Char elements. The 24DT Elements have a DTL characteristic. 24DT Setting sets the pick-up level and 24DT Delay the follower time delay.
Page 47: Figure 3-17 Logic Diagram: Overfluxing Elements (24)
Chapter 1) 7SR242 Duobias Description Of Operation Figure 3-17 Logic Diagram: Overfluxing Elements (24) ©2015 Siemens Protection Devices Limited Chapter 1 Page 41 of 60...
Page 48: Voltage Protection: Under/Over Voltage (27/59)
Chapter 1) 7SR242 Duobias Description Of Operation 3.11 Voltage Protection: Under/Over Voltage (27/59) Optionally four under/over voltage elements are provided. The relay utilises fundamental voltage measurement values for this function. 27/59-n Setting sets the pick-up voltage level for the element.
Page 49: Voltage Protection: Neutral Overvoltage (59N)
Chapter 1) 7SR242 Duobias Description Of Operation 3.12 Voltage Protection: Neutral Overvoltage (59N) Optionally two Neutral Overvoltage (or Neutral Voltage Displacement) elements are provided. One of the elements can be configured to be either definite time lag (DTL) or inverse definite minimum time...
Page 50: Voltage Protection: Under/Over Frequency (81)
Chapter 1) 7SR242 Duobias Description Of Operation 3.13 Voltage Protection: Under/Over Frequency (81) Optionally six under/over frequency elements are provided. Frequency elements are blocked if the measured voltage falls below the 81 U/V Guard setting. The sense of the element (under-frequency or over-frequency) is set by the 81-n Operation setting.
Page 51: Section 4: Control & Logic Functions
Chapter 1) 7SR242 Duobias Description Of Operation Section 4: Control & Logic Functions Quick Logic The ‘Quick Logic’ feature allows the user to input up to 16 logic equations (E1 to E16) in text format. Equations can be entered using Reydisp or at the relay fascia.
Page 52: Figure 4-1 Sequence Diagram Showing Pu/Do Timers In Quick Logic (Counter Reset Mode Off)
Chapter 1) 7SR242 Duobias Description Of Operation Figure 4-1 Sequence Diagram showing PU/DO Timers in Quick Logic (Counter Reset Mode Off) When the count value = En Counter Target the output of the counter (En) = 1 and this value is held until the initiating conditions are removed when En is instantaneously reset.
Page 53: Section 5: Supervision Functions
Chapter 1) 7SR242 Duobias Description Of Operation Section 5: Supervision Functions Circuit Breaker Failure (50BF) Two CB Fail elements are provided – one element per winding. Each circuit breaker fail function has two time delayed outputs that can be used for combinations of re-tripping or back-tripping.
Page 54: Figure 5-1 Logic Diagram: Circuit Breaker Fail Protection (50Bf)
Chapter 1) 7SR242 Duobias Description Of Operation 50BF-n Element 50BF-n CB Faulty Enabled & Disabled 50BF-n-1 User Inhibit 50BF-n Inhibit 50BF-n & 50BF-n-1 Delay Trip Contact & & 50BF-n Ext Trip 50BF-n Mech Trip 50BF-n-2 Delay 50BF-n-2 & & CB-n Closed...
Page 55: Trip/Close Circuit Supervision (74Tcs/74Ccs)
Chapter 1) 7SR242 Duobias Description Of Operation Trip/Close Circuit Supervision (74TCS/74CCS) The relay provides six trip and six close circuit supervision elements, all elements are identical in operation and independent from each other allowing 6 trip and 6 close circuits to be monitored.
Page 56: Inrush Detector (81Hbl2)
Chapter 1) 7SR242 Duobias Description Of Operation Inrush Detector (81HBL2) Inrush detector elements monitor the line currents. The inrush detector can be used to block the operation of selected elements during transformer magnetising inrush conditions. The 81HBL2 Bias setting allows the user to select between Phase, Sum and Cross methods of measurement: Phase Each phase is inhibited separately.
Page 57: Over Fluxing Detector (81Hbl5)
Chapter 1) 7SR242 Duobias Description Of Operation Over Fluxing Detector (81HBL5) Over fluxing detector elements monitor the line currents. The over fluxing detector can be used to block the operation of differential protection (87BD/ 87HS) elements. The 81HBL5 Bias setting allows the user to select between Phase, Sum and Cross methods of measurement:...
Page 58 Chapter 1) 7SR242 Duobias Description Of Operation ©2015 Siemens Protection Devices Limited Chapter 1 Page 52 of 60...
Page 59: Section 6: Other Features
Chapter 1) 7SR242 Duobias Description Of Operation Section 6: Other Features Data Communications Two communication ports, COM1 and COM2 are provided as standard. RS485 connections are available on the terminal blocks at the rear of the relay (COM1). A USB port, COM 2, is provided at the front of the relay for local access using a PC.
Page 60: Maintenance
Chapter 1) 7SR242 Duobias Description Of Operation Maintenance 6.3.1 Output Matrix Test The feature is available from the Relay fascia and allows the user to operate binary outputs or LEDs assigned to relay functions. Any protection function which is enabled in the setting menu will appear in the Output Matrix Test.
Page 61: Data Storage
Chapter 1) 7SR242 Duobias Description Of Operation Data Storage 6.4.1 General The relay stores three types of data records: relay event records, analogue/digital waveform records and fault data records. These data records are backed up in non-volatile memory and are permanently stored even in the event of loss of auxiliary d.c.
Page 62: Fault Data Records
Chapter 1) 7SR242 Duobias Description Of Operation 6.4.4 Fault Data Records Measured quantities for the last 100 relay trip fault records are stored with time and date of trip. The HMI LCD can display the latest 10 fault records with time and date of trip, measured quantities and LED status.
Page 63: Operating Mode
Chapter 1) 7SR242 Duobias Description Of Operation Operating Mode The relay has three operating modes, Local, Remote and Out of Service. The following table identifies the functions operation in each mode. The modes can be selected by the following methods: SYSTEM CONFIG>RELAY MODE setting, a Binary Input or Command...
Page 64: Real Time Clock
Chapter 1) 7SR242 Duobias Description Of Operation Real Time Clock Time and date can be set either via the relay fascia using appropriate commands in the System Config menu, via the data comms channel(s) or via the optional IRIG-B input.
Page 65: Password Feature
The password validation screen also displays a numerical code. If the password is lost or forgotten, this code should be communicated to Siemens Protection Devices Ltd. and the password can be retrieved. ©2015 Siemens Protection Devices Limited Chapter 1 Page 59 of 60...
Page 66 Chapter 1) 7SR242 Duobias Description Of Operation ©2015 Siemens Protection Devices Limited Chapter 1 Page 60 of 60...
Page 67 Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
Page 68 Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide ©2015 Siemens Protection Devices Limited Chapter 2 Page 2 of 22...
Page 69 Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide Contents Section 1: Introduction ............................5 1.1 Relay Menus And Display ........................5 1.2 Operation Guide ..........................6 1.2.1 User Interface Operation ...................... 6 1.3 Settings Display ..........................8 1.4 Instruments Mode ..........................8 1.5 Fault Data Mode ..........................
Page 70 Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide ©2015 Siemens Protection Devices Limited Chapter 2 Page 4 of 22...
Page 71: Section 1: Introduction
Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide Section 1: Introduction Relay Menus And Display All relay fascias contain the same access keys although the fascias may differ in appearance from model to model. The basic menu structure is also the same in all products and consists of four main menus, these being, Settings Mode - allows the user to view and (if allowed via the settings mode password) change settings in the relay.
Page 72: Operation Guide
Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide Operation Guide 1.2.1 User Interface Operation The basic menu structure flow diagram is shown in Figure 1.2-2. This diagram shows the main modes of display: Settings Mode, Instrument Mode, Fault Data Mode and Control Mode.
Page 73 Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide Figure 1-5 7SR24 Menu Structure ©2015 Siemens Protection Devices Limited Chapter 2 Page 7 of 22...
Page 74: Settings Display
Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide Settings Display The Settings Mode is reached by pressing the READ DOWN button from the relay identifier screen. Once the Settings Mode title screen has been located pressing the READ DOWN button takes the user into the Settings mode sub-menus.
Page 75 Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide DIFFERENTIAL METERS This is the sub-group that includes all the meters that are associated with Current TEST/RESET allows access to this sub-group to view W1 Line Displays Winding 1 Input 3 Phase currents Nominal RMS values &...
Page 76 Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide CURRENT METERS This is the sub-group that includes all the meters that are associated with Current TEST/RESET allows access to this sub-group to view W1 Primary Displays the 3 phase currents Primary RMS values 0.00kA...
Page 77 Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide VOLTAGE METERS This is the sub-group that includes all the meters that are associated with Voltage TEST/RESET allows access to this sub-group to view Voltage Meters Displays the Voltage RMS values Pri (Ph-Ph) 0.00kV...
Page 78 Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide Figure 1-6 Schematic Diagram: Current and Voltage Meters (includes optional functionality) ©2015 Siemens Protection Devices Limited Chapter 2 Page 12 of 22...
Page 79 Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide MAINTENANCE METERS This is the sub-group that includes all the meters that are associated with Maintenance TEST/RESET allows access to this sub-group to view CB1 Manual Close Displays the CB manual opening and closing times...
Page 80 Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide GENERAL ALARM METERS This is the sub-group that includes all the meters that are associated with the Binary inputs TEST/RESET allows access to this sub-group to view General Alarms Displays the state of General Alarm...
Page 81 Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide BINARY OUTPUT METERS This is the sub-group that includes all the meters that are associated with the Binary Outputs TEST/RESET allows access to this sub-group to view BO 1-8 ---- ---- Displays the state of DC binary Outputs 1 to 8.
Page 82: Fault Data Mode
Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide QUICK LOGIC METERS to view E 1-8 E 9-16 E1 Equation TMR 0-0 CNT 0-1 En Equation Fault Data Mode The Fault Data Mode sub menu lists the time and date of the previous ten protection operations. The stored data about each fault can be viewed by pressing the TEST/RESET button.
Page 83: Section 2: Setting The Relay Using Reydisp
Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide Section 2: Setting the Relay Using Reydisp Reydisp Evolution software provides a pc tool which can be used for programming of protection configuration and settings and the mapping of hardware input and outputs using a graphical interface. It is supplied with additional tools for configuration of serial communication protocol data objects, configuration of text for international language support and programming of user specific time current curves.
Page 84: Rear Rs485 Connection
Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide 2.1.2 Rear RS485 connection Figure 2-2 RS485 connection to PC 2.1.3 Optional rear fibre optic connection Figure 2-3 Fibre Optic Connection to PC Sigma devices have a 25 pin female D connector with the following pin out.
Page 85: Optional Rear Rs485 + Irig-B Connection
Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide 2.1.4 Optional rear RS485 + IRIG-B connection Figure 2.1-1 Additional (Optional) rear RS485 + IRIG-B connection to a PC 2.1.5 Optional rear RS232 + IRIG-B connection Figure 2.1-2 Additional (Optional) rear RS232 + IRIG-B connection to a PC...
Page 86: Optional Rear En100 Ethernet Module (Com3)
Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide 2.1.6 Optional Rear EN100 Ethernet Module (COM3) The optional ethernet interface is primarily provided for support of IEC 61850 protocol. Support for IEC 870-5-103 is also provided over this interface to allow connection with Reydisp Evolution and Reydisp Manager software for interrogation, editing and download of relay settings and other data.
Page 87: Configuring Relay Data Communication
Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide 2.1.7 Configuring Relay Data Communication Using the keys on the relay fascia scroll down the settings menu’s into the ‘communications’ menu. All of the below settings may not be available in all relay types. Reydisp software is compatible with IEC60870-5-103 protocol.
Page 88: Connecting To The Relay Via Reydisp
Chapter 2) 7SR242 Duobias Settings, Configuration & Instruments Guide Setting name Range Default Units Notes Setting is only visible when DNP3 Destination 0 … 65534 a port protocol is set to Address DNP3. Setting is only visible when DNP3 Application 5, 6 ...
Page 89 Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
Page 90 Chapter 3) 7SR242 Duobias Performance Specification ©2015 Siemens Protection Devices Limited Chapter 3 Page 2 of 50...
Page 91 Chapter 3) 7SR242 Duobias Performance Specification Contents Section 1: Common Functions ..........................7 1.1 General ............................. 7 1.1.1 CE Conformity........................7 1.1.2 Reference ..........................7 1.1.3 Dimensions and Weights ...................... 7 1.2 Energising Quantities ......................... 8 1.2.1 Auxiliary Power Supply ......................8 1.2.2...
Page 92 Chapter 3) 7SR242 Duobias Performance Specification 2.9.1 Reference .......................... 30 2.9.2 Operate and Reset Level ....................30 2.9.3 Operate and Reset Time ....................30 2.10 51 Time Delayed Overcurrent ......................31 2.10.1 Reference .......................... 31 2.10.2 Operate and Reset Level ....................31 2.10.3...
Page 93 Chapter 3) 7SR242 Duobias Performance Specification List of Figures Figure 1-1: Binary Input Configurations Providing Compliance with EATS 48-4 Classes ESI 1 and ESI 2 ............................12 Figure 2-1 Thermal Overload Protection Curves................... 27 Figure 2-2 IEC IDMTL Curves (Time Multiplier=1) ..................37 Figure 2-3 ANSI IDMTL Operate Curves (Time Multiplier=1) ................
Page 94 Chapter 3) 7SR242 Duobias Performance Specification ©2015 Siemens Protection Devices Limited Chapter 3 Page 6 of 50...
Page 95: Section 1: Common Functions
Chapter 3) 7SR242 Duobias Performance Specification Section 1: Common Functions General 1.1.1 CE Conformity This product is CE compliant to relevant EU directives. 1.1.2 Reference 1.1.2.1 Accuracy Reference Conditions This product has been tested under the following conditions, unless specifically stated otherwise.
Page 96: Energising Quantities
Chapter 3) 7SR242 Duobias Performance Specification Energising Quantities 1.2.1 Auxiliary Power Supply 1.2.1.1 Rating Nominal Operating Range 30, 48, 110, 220 VDC 24 to 290 VDC 1.2.1.2 Burden Battery loading can be estimated from the following approximate figures: Attribute Watts...
Page 97: Ac Current
Chapter 3) 7SR242 Duobias Performance Specification 1.2.2 AC Current Nominal Measuring Range 1, 5 A Phase and earth 80 x In 50, 60Hz 47 to 62Hz Note. 1 A and 5 A nominal inputs are user selectable on each model.
Page 98: Ac Voltage
Chapter 3) 7SR242 Duobias Performance Specification 1.2.3 AC Voltage Nominal Operating Range 40 to 160 V Up to 270 V 50, 60Hz 47 to 62Hz 1.2.3.1 Burden Attribute Value AC Burden 0.1 VA at 110 V 1.2.3.2 Thermal Withstand Overload Period...
Page 99: Binary (Digital) Outputs
Chapter 3) 7SR242 Duobias Performance Specification 1.2.4 Binary (Digital) Outputs Contact rating to IEC 60255-0-2 Attribute Value Carry continuously 5A AC or DC for 0.5 s 20A AC or DC Make and carry (L/R 40 ms and V 300 V) for 0.2 s...
Page 100 Chapter 3) 7SR242 Duobias Performance Specification Figure 1-1: Binary Input Configurations Providing Compliance with EATS 48-4 Classes ESI 1 and ESI 2 ©2015 Siemens Protection Devices Limited Chapter 3 Page 12 of 50...
Page 101: Functional Performance
Chapter 3) 7SR242 Duobias Performance Specification Functional Performance 1.3.1 Instrumentation Instrument Value Reference Typical accuracy Current 0.1In to 2.0In 1 % or 1 % In Voltage 0.1Vn to 1.2Vn 1 % or 1 % Vn 1.3.2 Data Communication 1.3.2.1 USB Data Communication Interface...
Page 102: Real Time Clock
Chapter 3) 7SR242 Duobias Performance Specification 1.3.2.6 Fibre Optic Ethernet Data Communication Interface (IEC 61850 Option) Attribute Value Physical Layer Fibre Optic Connectors Duplex LC 100BaseF in acc. With IEEE802.3 Recommended Fibre 62.5/125 m glass fibre with Duplex-LC connector Transmission Speed...
Page 103: Environmental Performance
Chapter 3) 7SR242 Duobias Performance Specification Environmental Performance 1.4.1 General 1.4.1.1 Temperature IEC 60068-2-1/2 Type Level Operating range -10 C to +55 C Storage range -25 C to +70 C 1.4.1.2 Humidity IEC 60068-2-78 Type Level Operational test 56 days at 40 C and 93 % relative humidity 1.4.1.3...
Page 104: Emissions
Chapter 3) 7SR242 Duobias Performance Specification 1.4.2 Emissions IEC 60255-25 1.4.2.1 Radiated Radio Frequency Type Limits at 10 m, Quasi-peak 30 to 230 MHz 40 dB( V/m) 230 to 10000 MHz 47 dB( V/m) 1.4.2.2 Conducted Radio Frequency Limits Type...
Page 105 Chapter 3) 7SR242 Duobias Performance Specification 1.4.3.5 Electrical Fast Transient / Burst Immunity IEC 60255-22-4 Class A (2002) Type Level Variation Case, Aux Power & I/O 4.0 kV 10 % RS485 Metallic Comms 2.0 kV No data loss 1.4.3.6 Surge Immunity...
Page 106: Mechanical
Chapter 3) 7SR242 Duobias Performance Specification 1.4.4 Mechanical 1.4.4.1 Vibration (Sinusoidal) IEC 60255-21-1 Class I Type Level Variation Vibration response 0.5 gn Vibration endurance 1.0 gn 1.4.4.2 Shock and Bump IEC 60255-21-2 Class I Type Level Variation Shock response 5 gn, 11 ms...
Page 107: Section 2: Protection Functions
Chapter 3) 7SR242 Duobias Performance Specification Section 2: Protection Functions 24 Over Fluxing 2.1.1 Reference (24DT) Parameter Value Setting 0.10, 0.11… 2.0 x Nominal Voltage / Nominal Frequency Hyst Hysteresis setting 0, 0.1… 80.0% 0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… 10000, Delay setting 10100…...
Page 108: Operate And Reset Time (24It)
Chapter 3) 7SR242 Duobias Performance Specification 2.1.6 Operate and Reset Time (24IT) Attribute Value Element basic operate time 500ms 300ms basic Operate time following delay 1 % or basic Repeatability Disengaging time < 250ms ©2015 Siemens Protection Devices Limited Chapter 3 Page 20 of 50...
Page 109: 27/59 Under/Over Voltage
Chapter 3) 7SR242 Duobias Performance Specification 27/59 Under/Over Voltage 2.2.1 Reference Parameter Value Setting 5, 5.5…200V hyst Hysteresis setting 0, 0.1… 80.0% 0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… Delay setting 10000, 10100… 14400 s 2.2.2 Operate and Reset Level...
Page 110: 37,37G Undercurrent
Chapter 3) 7SR242 Duobias Performance Specification 37,37G Undercurrent 2.3.1 Reference Parameter Value 37-n Setting 0.05, 0.10…5.0 xIn 0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… 37-n Delay setting 10000, 10100… 14400 s 37-n U/I Guard Setting 0.05, 0.10…5.0 xIn Parameter Value 37G-n Setting 0.05, 0.10…5.0 xIn...
Page 111: 46Bc Open Circuit
Chapter 3) 7SR242 Duobias Performance Specification 46BC Open Circuit 2.4.1 Reference Parameter Value NPS to PPS ratio 20,21…100% Delay setting 0.03,04,20.0,20.1,100,101,1000,1010…..14400 s 46BC-n U/I Guard Setting 0.05, 0.10…5.0 xIn 2.4.2 Operate and Reset Level Attribute Value Operate level: NPS to PPS ratio...
Page 112: 46Nps Negative Phase Sequence Overcurrent
Chapter 3) 7SR242 Duobias Performance Specification 46NPS Negative Phase Sequence Overcurrent 2.5.1 Reference (46DT) Parameter Value Setting 0.05, 0.06... 4.0xIn 0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… Delay setting 10000, 10100… 14400 s 2.5.2 Operate and Reset Level (46DT) Attribute...
Page 113: Operate And Reset Time (46It)
Chapter 3) 7SR242 Duobias Performance Specification 2.5.6 Operate and Reset Time (46IT) Attribute Value Starter operate time ( 2xIs) 35 ms, 10ms 5 % absolute or 50 ms, char = IEC-NI, IEC-VI, for char = IEC-NI : K = 0.14, = 0.02...
Page 114: Thermal Overload
Chapter 3) 7SR242 Duobias Performance Specification 49 Thermal Overload 2.6.1 Reference Parameter Value Overload setting 0.10, 0.11… 3 xIn Time constant setting 1, 1.5… 1000 min 2.6.2 Operate and Reset Level Attribute Value Overload level 100 % Is, 5 % or...
Page 115 Chapter 3) 7SR242 Duobias Performance Specification 100000 10000 = 1000 mins 1000 Time (sec) = 100 mins = 10 mins = 1 min Current (multiple of setting) Figure 2-1 Thermal Overload Protection Curves ©2015 Siemens Protection Devices Limited Chapter 3 Page 27 of 50...
Page 116: Instantaneous Overcurrent
Chapter 3) 7SR242 Duobias Performance Specification 50 instantaneous overcurrent 2.7.1 Reference Parameter Value Setting 0.05, 0.10… 25, 25.5… 50 xIn 0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… Delay setting 10000, 10100… 14400 s 2.7.2 Operate and Reset Level Attribute Value...
Page 117: Instantaneous Derived Earth Fault
Chapter 3) 7SR242 Duobias Performance Specification 50N instantaneous Derived Earth Fault 2.8.1 Reference Parameter Value Setting 0.05, 0.10… 25, 25.5… 50 xIn 0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… Delay setting 10000, 10100… 14400 s 2.8.2 Operate and Reset Level...
Page 118: Instantaneous Measured Earth Fault
Chapter 3) 7SR242 Duobias Performance Specification 50G Instantaneous Measured Earth Fault 2.9.1 Reference Parameter Value Setting 0.005…25.0 xIn 0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… Delay setting 10000, 10100… 14400 s 2.9.2 Operate and Reset Level Attribute Value Operate level...
Page 119: Time Delayed Overcurrent
Chapter 3) 7SR242 Duobias Performance Specification 2.10 51 Time Delayed Overcurrent 2.10.1 Reference Parameter Value Setting 0.05, 0.1… 2.5 xIn char Characteristic setting IEC-NI, -VI, -EI, -LTI; ANSI-MI, -VI, -EI; DTL Time Multiplier setting 0.025, 0.030… 1.6, 1.7… 5, 6… 100 Delay setting 0, 0.01…...
Page 120: Operate And Reset Time
Chapter 3) 7SR242 Duobias Performance Specification 2.10.3 Operate and Reset Time Attribute Value Starter operate time ( 2xIs) 20 ms, 20ms 5 % absolute or 30 ms, char = IEC-NI, IEC-VI, for char = IEC-NI : K = 0.14, = 0.02 IEC-EI, IEC-VI : K = 13.5,...
Page 121: Time Delayed Derived Earth Fault
Chapter 3) 7SR242 Duobias Performance Specification 2.11 51N Time Delayed Derived Earth Fault 2.11.1 Reference Parameter Value Setting 0.05, 0.1… 2.5 xIn char Characteristic setting IEC-NI, -VI, -EI, -LTI; ANSI-MI, -VI, -EI; DTL Time Multiplier setting 0.025, 0.030… 1.6, 1.7… 5, 6… 100 Delay setting 0, 0.01…...
Page 122: Operate And Reset Time
Chapter 3) 7SR242 Duobias Performance Specification 2.11.3 Operate and Reset Time Attribute Value Starter operate time ( 2xIs) 20 ms, 20ms 5 % absolute or 30 ms, char = IEC-NI, IEC-VI, for char = IEC-NI : K = 0.14, = 0.02 IEC-EI, IEC-VI : K = 13.5,...
Page 123: Time Delayed Measured Earth Fault
Chapter 3) 7SR242 Duobias Performance Specification 2.12 51G Time Delayed Measured Earth Fault 2.12.1 Reference Parameter Value Setting 0.005, 0.10… 1.0 xIn Char Characteristic setting IEC-NI, -VI, -EI, -LTI; ANSI-MI, -VI, -EI; DTL Time Multiplier setting 0.025, 0.030… 1.6, 1.7… 5, 6… 100 Delay setting (DTL) 0, 0.01…...
Page 124: Operate And Reset Time
Chapter 3) 7SR242 Duobias Performance Specification 2.12.3 Operate and Reset Time Attribute Value Starter operate time ( 2xIs) 20 ms, 20ms 5 % absolute or 30 ms, char = IEC-NI, IEC-VI, for char = IEC-NI : K = 0.14, = 0.02 IEC-EI, IEC-VI : K = 13.5,...
Page 125 Chapter 3) 7SR242 Duobias Performance Specification 1000 Time (sec) Long Time Inverse Normal Inverse Very Inverse Extremely Inverse 50 60 Current (multiples of setting) Figure 2-2 IEC IDMTL Curves (Time Multiplier=1) ©2015 Siemens Protection Devices Limited Chapter 3 Page 37 of 50...
Page 126 Chapter 3) 7SR242 Duobias Performance Specification 1000 Time (sec) Moderately Inverse Very Inverse Extremely Inverse 50 60 Current (multiples of setting) Figure 2-3 ANSI IDMTL Operate Curves (Time Multiplier=1) ©2015 Siemens Protection Devices Limited Chapter 3 Page 38 of 50...
Page 127 Chapter 3) 7SR242 Duobias Performance Specification 1000 Extremely Inverse Very Inverse Time (sec) Moderately Inverse 0.8 0.9 Current (multiples of setting) Figure 2-4 ANSI Reset Curves (Time Multiplier=1) ©2015 Siemens Protection Devices Limited Chapter 3 Page 39 of 50...
Page 128: Neutral Voltage Displacement
Chapter 3) 7SR242 Duobias Performance Specification 2.13 59N Neutral Voltage Displacement 2.13.1 Reference (59NDT) Parameter Value Setting 1, 1.5… 100V 0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… 10000, Delay setting 10100… 14400 s 2.13.2 Operate and Reset Level (59NDT) Attribute...
Page 129: Operate And Reset Time (59Nit)
Chapter 3) 7SR242 Duobias Performance Specification 2.13.6 Operate and Reset Time (59NIT) Attribute Value Starter operate time ( 2xVs) 65 ms, 20ms basic 5 % or 65 ms char = IDMTL Operate time char = DTL 1 % or 40ms...
Page 130: Restricted Earth Fault Protection
Chapter 3) 7SR242 Duobias Performance Specification 2.14 64H Restricted Earth Fault Protection 2.14.1 Reference Parameter Value Setting 0.005, 0.010… 0.95 xIn 0.00, 0.01… 20.0, 20.1… 100.0, 101.…1000, 1010 … Delay setting 10000 , 10100 … 14400 s 2.14.2 Operate and Reset Level...
Page 131: 81Under/Over Frequency
Chapter 3) 7SR242 Duobias Performance Specification 2.15 81Under/Over Frequency 2.15.1 Reference Parameter Value Setting 40, 40.01… 69.99 Hz Hyst Hysteresis setting 0, 0.1… 80% 0.00, 0.01… 20.0, 20.1… 100.0, 101.…1000, 1010 … 10000 , Delay setting 10100 … 14400 s 2.15.2 Operate and Reset Level...
Page 132: Biased Differential
Chapter 3) 7SR242 Duobias Performance Specification 2.16 87 Biased Differential 2.16.1 Reference Parameter Value Multiplier 1.00x Initial Setting 0.1, 0.15… 2 xIn init Bias Slope setting 0.1, 0.15… 0.7 x Bias Slope Limit 1, 2… 20 xIn Bias Slope setting 1, 1.05…...
Page 133: Operate And Reset Level
Chapter 3) 7SR242 Duobias Performance Specification 2.16.2 Operate and Reset Level Attribute Value OPERATE INITIAL SETTING OPERATE RESTRAIN (for OPERATE RESTRAIN RESTRAIN Where Operate level OPERATE Bias Slope Type = Line RESTRAIN B = 87BD 1 Bias slope limit = 87BD 1...
Page 134: 87Hs High-Set Differential
Chapter 3) 7SR242 Duobias Performance Specification 2.17 87HS High-Set Differential 2.17.1 Reference Parameter Value Multiplier 1.00x Setting 1, 2 … 30 xIn Delay setting 0, 0.005… 1s 2.17.2 Operate and Reset Level Attribute Value Operate level 5% of setting or 0.01In...
Page 135: Section 3: Supervision Functions
Chapter 3) 7SR242 Duobias Performance Specification Section 3: Supervision Functions 50BF Circuit Breaker Fail 3.1.1 Reference Parameter Value Setting: 50BF-n 0.050, 0.055… 2.0 xIn Setting: 50BF-n-I4 0.005, 0.010… 2.0 xIn Stage 1 Delay setting 0, 5… 60000ms CBF1 Stage 2 Delay setting 0, 5…...
Page 136: 74Tcs/Ccs Trip/Close Circuit Supervision
Chapter 3) 7SR242 Duobias Performance Specification 74TCS/CCS Trip/Close Circuit Supervision 3.2.1 Reference Parameter Value Delay setting 0, 0.02…60 s 3.2.2 Operate and Reset Time Attribute Value Element basic operate time 30ms 10ms basic Operate time following delay 1 % or...
Page 137: 81Hbl2 Inrush Detector
Chapter 3) 7SR242 Duobias Performance Specification 81HBL2 Inrush Detector 3.3.1 Reference Parameter Value Setting 0.10, 0.11... 0.5 (Ratio of 2nd Harmonic current to Fundamental component current) 3.3.2 Operate and Reset Level Attribute Value Operate level 100 % I, 4 % or...
Page 138: 81Hbl5 Overfluxing Detector
Chapter 3) 7SR242 Duobias Performance Specification 3.4 81HBL5 Overfluxing Detector 3.4.1 Reference Parameter Value Setting (Ratio of 5th Harmonic current to 0.10, 0.11... 0.5 Fundamental component current) 3.4.2 Operate and Reset Level Attribute Value Operate level 100 % I, 4 % or...
Page 139 No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
Page 141 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Contents 1. Introduction........................ 5 2. Physical Connection....................7 2.1 Introduction..............................7 2.2 USB Interface (COM2)..........................8 2.3 RS485 Interface (COM1)........................... 8 2.4 Serial Fibre Optic Interface (COM3 & COM4)..................10 2.5 Optional Rear RS485 (COM3)........................ 13 2.6 Optional Rear RS232 (COM3)........................
Page 142 Fig. 2-6 Additional (Optional) Rear RS232 + IRIG-B Connection to a PC............... 15 Fig. 2-7 RS232 Data Comms Pin Connections......................15 Fig. 2-8 EN100 Ethernet Module..........................17 Fig. A1 Operating Mode Table..........................91 Chapter 4 - Page 4 of 92 © 2015 Siemens Protection Devices Limited...
Page 143 Chapter 4 - 7SR242 Duobias · Data Communications Definitions 1. Introduction This section describes how to use the Communication Interface with a control system or interrogating computer. The interface is compatible with control and automation systems using industry standard communications protocols DNP3 , IEC 60870-5-103 , IEC 61850 and MODBUS-RTU.
Page 145: Introduction
Chapter 4 - 7SR242 Duobias · Data Communications Definitions 2. Physical Connection 2.1 Introduction The relay provides one “Front” USB communication interface (Com2) located on the fascia and one RS485 (Com1) located on the “Rear” as standard. An additional module may be fitted as an ordering option to provide extra rear serial port(s) or two Ethernet channels.
Page 146: Usb Interface (Com2)
USB Type A socket on PC USB Data Cable Local Engineer Access USB Type B USB Type A Fig. 2-1 Communication to Front USB Port 2.3 RS485 Interface (COM1) Chapter 4 - Page 8 of 92 © 2015 Siemens Protection Devices Limited...
Page 147 Chapter 4 - 7SR242 Duobias · Data Communications Definitions The 2-wire RS485 communication port is located on the rear of the relay and can be connected using a suitable RS485 120 Ohm screened twisted pair cable. The RS485 electrical connection can be used in a single or multi-drop configuration. The RS485 master must support and use the Auto Device Enable (ADE) feature.
Page 148: Serial Fibre Optic Interface (Com3 & Com4)
Typical losses at connectors are 0.5-1.0dB each. This allows for normal age related deterioration. Typical losses at splices are <0.3dB. (Consult fibre manufacturers' data for actual values). Chapter 4 - Page 10 of 92 © 2015 Siemens Protection Devices Limited...
Page 149 Chapter 4 - 7SR242 Duobias · Data Communications Definitions • Receiver sensitivity. The light power at the receiver must be above the sensitivity of the receiver in order that effective communication can occur. • A 3dB safety margin is usually allowed after the budget calculation is performed.
Page 150 Remote #1 In ring mode, echo = on, the whole fibre optic data comms link will be interrupted if the relay element is withdrawn from the case. Chapter 4 - Page 12 of 92 © 2015 Siemens Protection Devices Limited...
Page 151: Optional Rear Rs485 (Com3)
Chapter 4 - 7SR242 Duobias · Data Communications Definitions RS232 to Fibre Optic Converter RS232 straight through cable Computer or Control System 62.5/125µm fibre optic with ST USB or 9 pin male connectors 25 pin male D connector D connector Fig.
Page 152: Optional Rear Rs232 (Com3)
Fig. 2-5 Additional (Optional) Rear RS485 + IRIG-B Connection to a PC 2.6 Optional Rear RS232 (COM3) The following settings, on the COMMUNICATIONS MENU, must be configured when using the electrical RS232 Com3 interface. Chapter 4 - Page 14 of 92 © 2015 Siemens Protection Devices Limited...
Page 153 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Setting Name Range/Options Default Setting Notes The protocol used COM3 IEC60870-5-103 to communicate on IEC60870-5-103 the standard RS485 Protocol MODBUS-RTU connection. DNP3 An address within the range of the relevant COM3...
Page 154: Optional Rear En100 Ethernet Module (Com3)
While a 61850 session is established, an operator can simultaneously connect to the device via Reydisp Evolution or a web browser through the EN100 module. Configuration of 61850 communication is via the Reydisp Manager software package. Chapter 4 - Page 16 of 92 © 2015 Siemens Protection Devices Limited...
Page 155 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Ethernet – EN100-E Ethernet – EN100-O Ch 1 Ch 2 Ch 1 Ch 2 LED yellow LED yellow LED green LED green EN100 Module – RJ45 Interface EN100 Module – Duplex-LC Interface Green LED (Physical Link) Off –...
Page 157: Iec 60870-5-103 Definitions
Chapter 4 - 7SR242 Duobias · Data Communications Definitions 3. IEC 60870-5-103 Definitions 3.1 Introduction This section describes the IEC 60870-5-103 protocol implementation in the relays. This protocol is used for the communication with Reydisp software and can also be used for communication with a suitable control system.
Page 158: Cause Of Transmission
Negative command acknowledge Note: Events listing a GI cause of transmission can be raised and cleared; other events are raised only. Chapter 4 - Page 20 of 92 © 2015 Siemens Protection Devices Limited...
Page 159: Application Service Data Unit (Asdu) Type
Chapter 4 - 7SR242 Duobias · Data Communications Definitions 3.3 Application Service Data Unit (ASDU) Type The Application Service Data Unit (ASDU) column of the “Information Number and Function” table lists the possible ASDUs returned for a point. ASDU #...
Page 160: Point List
183 Quick Logic E2 1 SE, GI 184 Quick Logic E3 1 SE, GI 185 Quick Logic E4 1 SE, GI 186 Quick Logic E5 1 SE, GI Chapter 4 - Page 22 of 92 © 2015 Siemens Protection Devices Limited...
Page 161 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Description ASDU 187 Quick Logic E6 1 SE, GI 188 Quick Logic E7 1 SE, GI 189 Quick Logic E8 1 SE, GI 190 Quick Logic E9 1 SE, GI 191 Quick Logic E10...
Page 162 1 SE, GI 4 LED 4 1 SE, GI 5 LED 5 1 SE, GI 6 LED 6 1 SE, GI 7 LED 7 1 SE, GI Chapter 4 - Page 24 of 92 © 2015 Siemens Protection Devices Limited...
Page 163 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Description ASDU 8 LED 8 1 SE, GI 9 LED 9 1 SE, GI 10 LED 10 1 SE, GI 11 LED 11 1 SE, GI 12 LED 12 1 SE, GI...
Page 164 2 SE, GI 11 50-1 2 SE, GI 12 51N-1 2 SE, GI 13 50N-1 2 SE, GI 14 51G-1 2 SE, GI 15 50G-1 2 SE, GI Chapter 4 - Page 26 of 92 © 2015 Siemens Protection Devices Limited...
Page 165 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Description ASDU 16 51-2 2 SE, GI 17 50-2 2 SE, GI 18 51N-2 2 SE, GI 19 50N-2 2 SE, GI 20 51G-2 2 SE, GI 21 50G-2 2 SE, GI...
Page 166 1 SE, GI 125 CB1 Trip Time Alarm 1 SE, GI 126 CB2 Trip Time Alarm 1 SE, GI 2 SE, GI 127 E/F Out 20 Ack, Nak Chapter 4 - Page 28 of 92 © 2015 Siemens Protection Devices Limited...
Page 167 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Description ASDU 128 CB2 Total Trip Count 4 SE 129 CB2 Delta Trip Count 4 SE 63 General Trip 2 SE, GI 64 Trip L1 2 SE, GI 65 Trip L2...
Page 168: Measurands
The following Measurand EVT and INF numbers apply to this device. Description ASDU Cyclic - Measurand V,f Refresh rate 5 V (1.2x) (Window 1%) seconds or value f (1.2x) (Window 1%) Chapter 4 - Page 30 of 92 © 2015 Siemens Protection Devices Limited...
Page 169: Disturbance Recorder Actual Channel (Acc) Numbers
Chapter 4 - 7SR242 Duobias · Data Communications Definitions Description ASDU change greater than Window x Cyclic - Refresh Measurand W1 I rate 5 L1,2,3 seconds or value (2.4x) (Window 1%) change (2.4x) (Window 1%) greater than (2.4x) (Window 1%)
Page 171: Modbus Definitions
Chapter 4 - 7SR242 Duobias · Data Communications Definitions 4. MODBUS Definitions 4.1 Introduction This section describes the MODBUS-RTU protocol implementation in the relays. This protocol is used for communication with a suitable control system. This protocol can be set to use any or all of the relays hardware interfaces (USB, Fibre Optic, RS232 and RS485).
Page 172: Modbus Register Data Types
1,000,000 as a float (from above) we have 49742400h. Assume this is stored in the registers 30001 and 30002, it would look as follows. Address Value 30001 4974 Chapter 4 - Page 34 of 92 © 2015 Siemens Protection Devices Limited...
Page 173: Fp_32Bits_3Dp
Chapter 4 - 7SR242 Duobias · Data Communications Definitions Address Value 30002 2400 On reception these two registers should be interpreted in the correct order as IEEE754 floating point representation. 4.2.2 FP_32BITS_3DP The FP_32BITS_3DP is a 32 bit integer fixed point value, containing 3 decimal places of information. It is used to send a real value to 3 decimal places as an integer.
Page 174: Event
Measurand format R32.23, sent least significant byte first. The following tables show the fields in the different event records as they are returned. Byte Content FUN INF ms L Event Type 1 Format. Chapter 4 - Page 36 of 92 © 2015 Siemens Protection Devices Limited...
Page 175: Eventcount
Chapter 4 - 7SR242 Duobias · Data Communications Definitions Byte Content FUN INF DPI RT L F# L F# H ms L Event Type 2 Format. Byte Content FUN INF Meas ms L Event Type 4 Format. 4.2.6 EVENTCOUNT The EVENTCOUNT register contains the current number of events in the relay's event buffer.
Page 176 0905h. Assume this is stored in the register 30001, it would look as follows: Address Value 30001 0905 On reception this register should be interpreted as a 16 bit integer. Chapter 4 - Page 38 of 92 © 2015 Siemens Protection Devices Limited...
Page 177: Point List
Chapter 4 - 7SR242 Duobias · Data Communications Definitions 4.3 Point List The information shown below is the default configuration. This can be modified using the Communications Configuration Editor tool, refer section 9 for details. 4.3.1 Coils (Read Write Binary values)
Page 178: Inputs (Read Only Binary Values)
10031 Binary Input 31 10032 Binary Input 32 10101 General Start/Pick-up 10102 General Trip 10103 Start/Pick-up L1 10104 Start/Pick-up L2 10105 Start/Pick-up L3 10106 Start/Pick-up N 10107 Trip L1 Chapter 4 - Page 40 of 92 © 2015 Siemens Protection Devices Limited...
Page 179 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Address Name 10108 Trip L2 10109 Trip L3 10110 PhaseN_Trip 10111 Trip Circuit Fail 10120 Local Mode 10121 Remote Mode 10122 Service Mode 10123 Local & Remote 10130 Trip Circuit Fail 1...
Page 180 10603 LED 3 10604 LED 4 10605 LED 5 10606 LED 6 10607 LED 7 10608 LED 8 10609 LED 9 10610 LED 10 10611 LED 11 Chapter 4 - Page 42 of 92 © 2015 Siemens Protection Devices Limited...
Page 181 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Address Name 10612 LED 12 10613 LED 13 10614 LED 14 10615 LED 15 10616 LED 16 10617 LED 17 10618 LED 18 10619 LED 19 10620 LED 20 10621 LED 21...
Page 182 12117 A_50N_1_Starter1 12118 50N-1 12120 51-1 12121 50-1 12200 A_51_2_Starter1 12201 A_51_2_Starter2 12202 A_51_2_Starter3 12203 A_51_2_Operated1 12204 A_51_2_Operated2 12205 A_51_2_Operated3 12207 A_50_2_Starter1 12208 A_50_2_Starter2 12209 A_50_2_Starter3 12210 A_50_2_Operated1 Chapter 4 - Page 44 of 92 © 2015 Siemens Protection Devices Limited...
Page 183 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Address Name 12211 A_50_2_Operated2 12212 A_50_2_Operated3 12214 A_51N_2_Starter1 12215 51N-2 12217 A_50N_2_Starter1 12218 50N-2 12220 51-2 12221 50-2 12400 A_50BF_1_ReTrip 12401 A_50BF_1_BackTrip 12402 A_50BF_2_ReTrip 12403 A_50BF_2_BackTrip 12405 A59NIT_Starter1 12406 A59NDT_Starter1 12407 59NIT...
Page 184 12836 User Output 5 12837 User Output 6 12838 User Output 7 12839 User Output 8 12840 User Output 9 12841 User Output 10 12842 User Output 11 Chapter 4 - Page 46 of 92 © 2015 Siemens Protection Devices Limited...
Page 185: Input Registers (Read Only Registers)
Chapter 4 - 7SR242 Duobias · Data Communications Definitions Address Name 12843 User Output 12 12844 User Output 13 12845 User Output 14 12846 User Output 15 12847 User Output 16 12848 User Output 17 12849 User Output 18 12850 User Output 19...
Page 186 31124 W1 Relay Ia FP_32BITS_3DP 1.000000 W1 Relay Ia xIn 31126 W1 Relay Ib FP_32BITS_3DP 1.000000 W1 Relay Ib xIn 31128 W1 Relay Ic FP_32BITS_3DP 1.000000 W1 Relay Ic xIn Chapter 4 - Page 48 of 92 © 2015 Siemens Protection Devices Limited...
Page 187: Holding Registers (Read Write Registers)
Chapter 4 - 7SR242 Duobias · Data Communications Definitions Address Name Format Mult Description 31200 W2 Primary Ia FP_32BITS_3DP 1.000000 W2 Primary Ia A 31202 W2 Primary Ib FP_32BITS_3DP 1.000000 W2 Primary Ib A 31204 W2 Primary Ic FP_32BITS_3DP 1.000000 W2 Primary Ic A...
Page 188 41210 W2 Secondary Ic FP_32BITS_3DP 1.000000 W2 Secondary Ic A 41212 W2 Nominal Ia FP_32BITS_3DP 1.000000 W2 Ia xIn 41214 W2 Nominal Ib FP_32BITS_3DP 1.000000 W2 Ib xIn Chapter 4 - Page 50 of 92 © 2015 Siemens Protection Devices Limited...
Page 189 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Address Name Format Mult Description 41216 W2 Nominal Ic FP_32BITS_3DP 1.000000 W2 Ic xIn 41218 W2 Line Ia FP_32BITS_3DP 1.000000 W2 Line Ia xIn 41220 W2 Line Ib FP_32BITS_3DP 1.000000 W2 Line Ib xIn...
Page 191: Dnp3 Definitions
(Also see the DNP 3.0 Implementation Table in Section 5.2, beginning on page 56). Vendor Name: Siemens Protection Devices Ltd. Device Name: 7SR242 Duobias, using the Triangle MicroWorks, Inc. DNP3 Slave Source Code Library, Version 3. Device Function: Highest DNP Level Supported:...
Page 192 No Counters Reported Configurable (attach explanation) Configurable 16 Bits Default Object 32 Bits Default Variation: _____ Other Value: _____ Point-by-point list attached Point-by-point list attached Sends Multi-Fragment Responses: Configurable Chapter 4 - Page 54 of 92 © 2015 Siemens Protection Devices Limited...
Page 193 Chapter 4 - 7SR242 Duobias · Data Communications Definitions DNP V3.0 DEVICE PROFILE DOCUMENT (Also see the DNP 3.0 Implementation Table in Section 5.2, beginning on page 56). Sequential File Transfer Support: File Transfer Support Append File Mode Custom Status Code Strings...
Page 194: Implementation Table
(unsol. resp) 00, 01 (start-stop) Binary Output 1 (read) 06 (no range, or all) - Any Variation 22 (assign class) 07, 08 (limited qty) 17, 27, 28 (index) Chapter 4 - Page 56 of 92 © 2015 Siemens Protection Devices Limited...
Page 195 Chapter 4 - 7SR242 Duobias · Data Communications Definitions REQUEST RESPONSE OBJECT (Library will parse) (Library will respond with) Function Object Function Codes Qualifier Codes Qualifier Codes Variation Description Codes Number (dec) (hex) (hex) (dec) 00, 01 (start-stop) 00, 01 (start-stop)
Page 196 07, 08 (limited qty) (unsol. resp) 16-Bit Counter Change 06 (no range, or all) 1 (read) (response) 17, 28 (index) Event (with Time) 07, 08 (limited qty) Chapter 4 - Page 58 of 92 © 2015 Siemens Protection Devices Limited...
Page 197 Chapter 4 - 7SR242 Duobias · Data Communications Definitions REQUEST RESPONSE OBJECT (Library will parse) (Library will respond with) Function Object Function Codes Qualifier Codes Qualifier Codes Variation Description Codes Number (dec) (hex) (hex) (dec) (unsol. resp) 32-Bit Delta Counter...
Page 198 00, 01 (start-stop) Short Floating Point 1 (read) 06 (no range, or all) 17, 28 (index Analog Input Deadband (response) 07, 08 (limited qty) - see note 2) Chapter 4 - Page 60 of 92 © 2015 Siemens Protection Devices Limited...
Page 199 Chapter 4 - 7SR242 Duobias · Data Communications Definitions REQUEST RESPONSE OBJECT (Library will parse) (Library will respond with) Function Object Function Codes Qualifier Codes Qualifier Codes Variation Description Codes Number (dec) (hex) (hex) (dec) 17, 27, 28 (index) 00, 01 (start-stop)
Page 200: Point List
14 Binary Input 14 15 Binary Input 15 16 Binary Input 16 17 Binary Input 17 18 Binary Input 18 19 Binary Input 19 20 Binary Input 20 Chapter 4 - Page 62 of 92 © 2015 Siemens Protection Devices Limited...
Page 201 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Binary Input Points Static (Steady-State) Object Number: 1 (Packed Format) Change Event Object Number: 1 (w/o Time) Static Variation reported when variation 0 requested: 1 (Binary Input w/o status) or 2 (Binary Input with status)
Page 202 115 Trip Circuit Fail 5 116 Trip Circuit Fail 6 121 CB1 Total Trip Count 122 CB1 Delta Trip Count 124 I^2t CB1 Wear 125 I^2t CB2 Wear Chapter 4 - Page 64 of 92 © 2015 Siemens Protection Devices Limited...
Page 203 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Binary Input Points Static (Steady-State) Object Number: 1 (Packed Format) Change Event Object Number: 1 (w/o Time) Static Variation reported when variation 0 requested: 1 (Binary Input w/o status) or 2 (Binary Input with status)
Page 204 256 Setting G3 selected 257 Setting G4 selected 258 Setting G5 selected 259 Setting G6 selected 260 Setting G7 selected 261 Setting G8 selected 501 Virtual Input 1 Chapter 4 - Page 66 of 92 © 2015 Siemens Protection Devices Limited...
Page 205 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Binary Input Points Static (Steady-State) Object Number: 1 (Packed Format) Change Event Object Number: 1 (w/o Time) Static Variation reported when variation 0 requested: 1 (Binary Input w/o status) or 2 (Binary Input with status)
Page 206 731 LED PU 31 732 LED PU 32 900 User SP Command 1 901 User SP Command 2 902 User SP Command 3 903 User SP Command 4 Chapter 4 - Page 68 of 92 © 2015 Siemens Protection Devices Limited...
Page 207 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Binary Input Points Static (Steady-State) Object Number: 1 (Packed Format) Change Event Object Number: 1 (w/o Time) Static Variation reported when variation 0 requested: 1 (Binary Input w/o status) or 2 (Binary Input with status)
Page 208 The default select/control buffer size is large enough to hold 10 of the largest select requests possible. Binary outputs are by default NOT returned in a class zero interrogation. Note, not all points listed here apply to all builds of devices. Chapter 4 - Page 70 of 92 © 2015 Siemens Protection Devices Limited...
Page 209 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Binary Output Status Points Static (Steady-State) Object Number: 10 Change Event Object Number: 11 Control Relay Output Blocks (CROB) Object Number: 12 Binary Output Command Event Object Number: 13 Static Variation reported when variation 0 requested: 1 (Binary Output w/o status)
Page 210 Reset CB1 Total Trip Latch On Pulse On Count, write only location. Close Pulse On Reset CB1 Delta Trip Latch On Pulse On Count, write only location. Close Chapter 4 - Page 72 of 92 © 2015 Siemens Protection Devices Limited...
Page 211 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Binary Output Status Points Static (Steady-State) Object Number: 10 Change Event Object Number: 11 Control Relay Output Blocks (CROB) Object Number: 12 Binary Output Command Event Object Number: 13 Static Variation reported when variation 0 requested: 1 (Binary Output w/o status)
Page 212 Pulse On 109 User DP Command 6. Latch Off Pulse Off Close Trip Pulse On Pulse On 110 User DP Command 7. Pulse Off Pulse Off Latch On Chapter 4 - Page 74 of 92 © 2015 Siemens Protection Devices Limited...
Page 213: Counters
Chapter 4 - 7SR242 Duobias · Data Communications Definitions Binary Output Status Points Static (Steady-State) Object Number: 10 Change Event Object Number: 11 Control Relay Output Blocks (CROB) Object Number: 12 Binary Output Command Event Object Number: 13 Static Variation reported when variation 0 requested: 1 (Binary Output w/o status)
Page 214 34 E14 Counter 35 E15 Counter 36 E16 Counter 66 CB1 Total Trip Count 67 CB1 Delta Trip Count 68 CB2 Total Trip Count 69 CB2 Delta Trip Count Chapter 4 - Page 76 of 92 © 2015 Siemens Protection Devices Limited...
Page 215: Analog Inputs
Chapter 4 - 7SR242 Duobias · Data Communications Definitions 5.3.5 Analog Inputs The following table lists Analog Inputs (Object 30). It is important to note that 16-bit and 32-bit variations of Analog Inputs, Analog Output Control Blocks, and Analog Output Statuses are transmitted through DNP as signed numbers.
Page 216 47 W2 Secondary Ib 100.000 0.100 48 W2 Secondary Ic 100.000 0.100 49 W2 Nominal Ia 100.000 0.100 50 W2 Nominal Ib 100.000 0.100 51 W2 Nominal Ic 100.000 0.100 Chapter 4 - Page 78 of 92 © 2015 Siemens Protection Devices Limited...
Page 217: Additional Settings
Chapter 4 - 7SR242 Duobias · Data Communications Definitions Analog Inputs Static (Steady-State) Object Number: 30 Change Event Object Number: 32 Analog Input Deadband: 34 Static Variation reported when variation 0 requested: 1 (32-Bit Analog Input with Flag) or 2 (16-Bit Analog Input with Flag)
Page 218 Unsolicited Events set to Enabled. Setting is only visible DNP3 when any port Application 5, 6 ... 299, 300 As Required Protocol is set to Timeout DNP3. Chapter 4 - Page 80 of 92 © 2015 Siemens Protection Devices Limited...
Page 219: Not Applicable
Chapter 4 - 7SR242 Duobias · Data Communications Definitions 6. Not Applicable This Page Intentionally Left Blank. © 2015 Siemens Protection Devices Limited Chapter 4 - Page 81 of 92...
Page 221: Iec61850 Protocol Support
Chapter 4 - 7SR242 Duobias · Data Communications Definitions 7. IEC61850 Protocol Support 7.1 Introduction The relay can optionally be provided with IEC61850 comms. For further details refer to the following publications: • Model Implementation Conformance Statement (MICS) • Protocol Implementation Conformance Statement (PICS) •...
Page 223: Serial Modems
Chapter 4 - 7SR242 Duobias · Data Communications Definitions 8. Serial Modems 8.1 Introduction The communications interface has been designed to allow data transfer via modems. A suitable Modem can be connected directly to the Relay's serial interface, for example RS232, RS485 or fibre-optic port where fitted.
Page 225: Configuration
Chapter 4 - 7SR242 Duobias · Data Communications Definitions 9. Configuration The data points and control features which are possible within the relay is fixed and can be transmitted over the communication channel(s) protocols in the default format described earlier in this document. The default data transmitted is not always directly compatible with the needs of the substation control system and will require some tailoring;...
Page 226 Instruments menu. The user must ensure when naming the file, they use a unique file name including the version number. Please refer to the Communications Editor User Guide for further guidance. Chapter 4 - Page 88 of 92 © 2015 Siemens Protection Devices Limited...
Page 227: Glossary
When connecting relays in an optical ring architecture, the data must be passed from one relay to the next, therefore when connecting in this method all relays must have the Data Echo ON. EN100 Siemens' Ethernet communications module supporting IEC61850, available in optical and electrical versions. Ethernet A computer networking technology.
Page 228 Bit (logical 1) sent to signify the end. Universal Serial Bus standard for the transfer of data. Wide Area Network. A computer network covering a large geographic area. Chapter 4 - Page 90 of 92 © 2015 Siemens Protection Devices Limited...
Page 229 Chapter 4 - 7SR242 Duobias · Data Communications Definitions Appendix 1 The operating mode of the device is set via the setting, or through a command sent to a communications port. There are four options; Local, Remote, Local or Remote and Service.
Page 230 Tyne and Wear NE31 1TZ United Kingdom For enquiries please contact our Customer Support Centre Tel.: +49 180/524 8437 (24hrs) Fax.: +49 180/524 2471 E-Mail:support.ic@siemens.com www.siemens.com/reyrolle Template Revision 15. Chapter 4 - Page 92 of 92 © 2015 Siemens Protection Devices Limited...
Page 231 Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
Page 233 Chapter 5) 7SR242 Duobias Installation Guide Contents Installation Guide ..........................1 Document Release History ....................... 1 Contents ............................3 List of Figures ........................... 4 Section 1: Installation ........................5 1.1 Packaging ..........................5 1.2 Unpacking, Storage and Handling ..................5 1.3 Recommended Mounting Position ..................
Page 234 Chapter 5) 7SR242 Duobias Installation Guide List of Figures Figure 3.1-1 Overall Dimensions and panel Drilling for Size E8 Epsilon case ........8 Figure 3.1-2 Overall Dimensions and panel Drilling for Size E10 Epsilon case ........9 Figure 3.1-3 Overall Dimensions and panel Drilling for Size E12 Epsilon case ........10 Figure 5.1-1 7SR242 Wiring Diagram ....................
Page 235: Packaging
If damage has been sustained a claim should be immediately be made against the carrier, also inform Siemens Protection Devices Limited and to the nearest Siemens agent, using the Defect Report Form in the Maintenance section of this manual.
Page 236: Disposal
Chapter 5) 7SR242 Duobias Installation Guide Disposal The Relay should be disposed of in a manner which does not provide a threat to health or the environment. All laws and regulations specific to the country of disposal should be adhered to.
Page 237: Section 2: Equipment Operating Conditions
Chapter 5) 7SR242 Duobias Installation Guide Section 2: Equipment Operating Conditions General Safety Precautions Current Transformer Circuits The secondary circuit of a live CT must not be open circuited. Non-observance of this precaution can result in injury to personnel or damage to equipment.
Page 238: Section 3: Dimensions And Panel Fixings
Chapter 5) 7SR242 Duobias Installation Guide Section 3: Dimensions and Panel Fixings 3.1 Relay Dimensions Relays are supplied in size E8, E10 and E12 cases. Panel cut-out requirements and case dimensions are shown below. Figure 3.1-1 Overall Dimensions and panel Drilling for Size E8 Epsilon case ©2015 Siemens Protection Devices Limited...
Page 239 Chapter 5) 7SR242 Duobias Installation Guide 254.5 Optional ethernet 216.5 comms module Case Earth connection Typical when fitted SIDE VIEW FRONT VIEW 25mm MIN CLEARANCE FOR TERMINAL WIRING 70mm MIN CLEARANCE FOR F/O COMMS CABLE 75mm MIN CLEARANCE BELOW EN100 MODULE...
Page 240 Chapter 5) 7SR242 Duobias Installation Guide Figure 3.1-3 Overall Dimensions and panel Drilling for Size E12 Epsilon case ©2015 Siemens Protection Devices Limited Chapter 5 Page 10 of 24...
Page 241: Fixings
Chapter 5) 7SR242 Duobias Installation Guide Fixings 3.2.1 Crimps M4 Ring tongued crimps with 90 bend are recommended for connection to the standard M4 terminal screws and RS485 port connections. 3.2.2 Panel Fixings Typical mounting screw kit per Relay) Consists of 4 off M4x10mm Screws...
Page 242: Section 4: Rear Terminal Drawings
Chapter 5) 7SR242 Duobias Installation Guide Section 4: Rear Terminal Drawings E8 CASE E8 STANDARD COMMS:- USB FRONT PORT,RS485 (SEE NOTE 2) E8 STANDARD COMMS + ADDITIONAL PORTS USB FRONT PORT, RS485 (SEE NOTE 2), 2 X F.O. (S.T. CONNECTORS), IRIG B ©2015 Siemens Protection Devices Limited...
Page 243 Chapter 5) 7SR242 Duobias Installation Guide E8 STANDARD COMMS + ADDITIONAL PORTS USB FRONT PORT, 2 x RS485 (SEE NOTE 2), IRIG B E8 STANDARD COMMS + ADDITIONAL PORTS USB FRONT PORT, RS485 (SEE NOTE 2), RS232, IRIG B Notes 1) Recommended terminations are pre-insulated &...
Page 244: E10 Case
Chapter 5) 7SR242 Duobias Installation Guide E10 CASE E10 STANDARD COMMS:- USB FRONT PORT,RS485 (SEE NOTE 2) E10 STANDARD COMMS + ADDITIONAL PORTS USB FRONT PORT, RS485 (SEE NOTE 2), 2 X F.O. (S.T. CONNECTORS), IRIG B ©2015 Siemens Protection Devices Limited...
Page 245 Chapter 5) 7SR242 Duobias Installation Guide E10 STANDARD COMMS + ADDITIONAL PORTS USB FRONT PORT, 2 x RS485 (SEE NOTE 2), IRIG B E10 STANDARD COMMS + ADDITIONAL PORTS USB FRONT PORT, RS485 (SEE NOTE 2), RS232, IRIG B ©2015 Siemens Protection Devices Limited...
Page 246 Chapter 5) 7SR242 Duobias Installation Guide E10 STANDARD COMMS + ADDITIONAL ETHERNET PORTS (RJ45 shown, Fibre optic LC similar) Notes 1) Recommended terminations are pre-insulated & must be crimped using approved tooling. 2) RS485 (block ”B” terminals 14, 16, 18, 20 and optional COMMS MODULE) connections are by screened, twisted pair cable.
Page 247: Section 5: Connection/Wiring/Diagrams
Chapter 5) 7SR242 Duobias Installation Guide Section 5: Connection/Wiring/Diagrams Wiring Diagram: 7SR242 Relay Figure 5.1-1 7SR242 Wiring Diagram ©2015 Siemens Protection Devices Limited Chapter 5 Page 17 of 24...
Page 248 Chapter 5) 7SR242 Duobias Installation Guide ©2015 Siemens Protection Devices Limited Chapter 5 Page 18 of 24...
Page 249: Section 6: Data Comms Connections
Chapter 5) 7SR242 Duobias Installation Guide Section 6: Data Comms Connections RS485 Connection The RS485 communication port terminals are located on the rear of the relay and can be connected using a suitable RS485 120 screened twisted pair cable. The RS485 electrical connection can be used in a single or multi-drop configuration. When used with Reydisp the RS485 master must support and use the Auto Device Enable (ADE) feature.
Page 250: Optional Fibre Optic Connections
Chapter 5) 7SR242 Duobias Installation Guide Optional Fibre Optic Connections Where fitted rear Data Comms ports 3 and 4 comprise Fibre–Optic ST™ (BFOC/2.5) bayonet connectors-4 per product. 62.5 / 125 m glass fibre is recommended for all lead lengths. When installing fibre, ensure that the fibres’ bend radii comply with the recommended minimum for the fibre used- typically 50mm is acceptable.
Page 251: Optional Additional Rs485 Connections
Chapter 5) 7SR242 Duobias Installation Guide Optional Additional RS485 Connections The additional (optional) RS485 communication port is located at the rear of the relay and can be connected using a suitable RS485 120 ohm screened twisted pair cable. The RS485 electrical connection can be used in a single or multi-drop configuration. When used with Reydisp the RS485 master must support and use the Auto Device Enable (ADE) feature.
Page 252: Additional (Optional) Ethernet Connection For Iec 61850
Chapter 5) 7SR242 Duobias Installation Guide Additional (Optional) Ethernet Connection for IEC 61850 Rear Ethernet Comms port Ch 1 and Ch 2 comprises Fibre–Optic Duplex LC connectors or electrical RJ45 connectors. When installing fibre, ensure that the fibres’ bend radii comply with the recommended minimum for the fibre used- typically 50mm is acceptable, 62.5 / 125 m glass fibre is recommended for all distances.
Page 253: Section 7: Connection Diagrams
Chapter 5) 7SR242 Duobias Installation Guide Section 7: Connection Diagrams Typical AC Connections: 7SR242 Figure 7.1-1 7SR24 Typical Connections ©2015 Siemens Protection Devices Limited Chapter 5 Page 23 of 24...
Page 254 Chapter 5) 7SR242 Duobias Installation Guide ©2015 Siemens Protection Devices Limited Chapter 5 Page 24 of 24...
Page 255 Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
Page 256 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide ©2015 Siemens Protection Devices Limited Chapter 6 Page 2 of 62...
Page 257 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Contents Commissioning and Maintenance ....................1 Document Release History ....................... 1 Contents ............................3 Section 1: Common Functions ......................7 1.1 Overview ..........................7 1.2 Before Testing ........................7 1.2.1 Safety ........................7 1.2.2...
Page 258 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.11 Under/Over Frequency (81) ....................46 2.12 Overfluxing (24)........................48 2.12.1 definite time (24DT) ....................48 2.12.2 inverse time (24IT) ....................49 Section 3: Supervision Functions ....................51 3.1 CB Fail (50BF) ........................51 3.2 Trip/Close Circuit Supervision (74TCS, 74CCS) ...............
Page 259 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide List of Figures Figure 2-1 Biased Differential ......................17 Figure 2-2 Secondary Injection using a Variac ................18 Figure 2-3 Phase Overcurrent ......................21 Figure 2-4 Measured Earth Fault ...................... 24 Figure 2-5 Measured Earth Fault ...................... 27 Figure 2-6 Restricted Earth Fault ......................
Page 260 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide ©2015 Siemens Protection Devices Limited Chapter 6 Page 6 of 62...
Page 261: Overview
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Section 1: Common Functions Overview Commissioning tests are carried out to prove: Equipment has not been damaged in transit. Equipment has been correctly connected and installed. Prove characteristics of the protection and settings which are based on calculations.
Page 262: Test Equipment
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 1.2.3 Test Equipment Required test equipment is: Secondary injection equipment with integral time interval meter Primary injection equipment A d.c. supply with nominal voltage within the working range of the relay's d.c. auxiliary supply rating A d.c.
Page 263: Applying Settings
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 1.2.5 Applying Settings The relay settings for the particular application should be applied before any secondary testing occurs. If they are not available then the relay has default settings that can be used for pre-commissioning tests. See the Relay Settings section of this manual for the default settings.
Page 264: Tests
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Tests 1.3.1 Inspection Ensure that all connections are tight and correct to the relay wiring diagram and the scheme diagram. Record any deviations. Check that the relay is correctly programmed and that it is fully inserted into the case. Refer to ‘Section 2: Settings and Instruments’...
Page 265: Ac Energising Quantities
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide AC Energising Quantities Voltage and current measurement for each input channel is displayed in the Instrumentation Mode sub-menus, each input should be checked for correct connection and measurement accuracy by single phase secondary injection at nominal levels.
Page 266: Binary Inputs
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Binary Inputs The operation of the binary input(s) can be monitored on the ‘Binary Input Meters’ display shown in ‘Instruments Mode’. Apply the required supply voltage onto each binary input in turn and check for correct operation.
Page 267: Binary Outputs
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Binary Outputs A minimum of six output relays are provided. Two of these have change over contacts, BO2 & BO3, one has a normally closed contact, BO1 and the remainder have normally open contacts.
Page 268 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide ©2015 Siemens Protection Devices Limited Chapter 6 Page 14 of 62...
Page 269: Section 2: Protection Functions
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Section 2: Protection Functions This section details the procedures for testing each protection function of the 7SR24 relay. These tests are carried out to verify the accuracy of the protection pick-ups and time delays at setting and to confirm correct operation of any associated input and output functionality.
Page 270 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Particular care should be taken when testing overcurrent functions that the thermal rating of the current inputs is not exceeded. It should be considered that where several overlapping elements are used simultaneously, the overall protection operate time may be dependent on the operation of different individual elements at the various levels of applied current or voltage.
Page 271: Biased Differential (87Bd, 87Hs)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Biased Differential (87BD, 87HS) Figure 2-1 Biased Differential Voltage Inputs: None Current Inputs: W1-I ),W1-I ),W1-I ), and W2-I ),W2-I ),W2-I Disable: 46, 49, 50, 51, 50N, 51N, 50BF, Map Pickup LED:...
Page 272 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Secondary testing of the bias characteristic will be greatly simplified by the use of automated numeric protection test equipment such as the Omicron CMC256. This equipment can be programmed using setting which match those of the relay to test for accuracy over the whole operating range and give a clear easy to use graphical display of relay performance against the specified characteristic.
Page 273 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.1.1.2 Results for testing 87BD with 2 current sources 87BD I 87BD 1 W1 C NITIAL URRENT ETTING LOPE ETTING 0.00 1.00 1.50 2.00 2.50 W2 Current (x I 0.10 0.10 1.11 1.66...
Page 274: Primary Injection Testing
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.1.2 Primary Injection Testing Primary injection is recommended to prove the relay connections, CT polarity and settings before putting the protection scheme into service. Primary injection is essential to fully prove the connections of the Biased Differential and REF protections.
Page 275: Phase Overcurrent (50, 51)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.1.3 Phase Overcurrent (50, 51) Figure 2-3 Phase Overcurrent Voltage Inputs: None Current Inputs: W1-I ), W1-I ), W1-I ), or W2-I ), W2-I ), W2-I Disable: 46, 49, 50BF, 87BD, 87HS...
Page 276: Definite Time Overcurrent (50)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.1.4 Definite Time Overcurrent (50) If DTL setting is small, gradually increase current until element operates. If DTL is large apply 0.9x setting, check for no operation, apply 1.1x setting, check operation...
Page 277 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.1.5.1 Element Blocking The Phase Overcurrent elements can be blocked by Binary Input Inhibit and Inrush Detector operation. This functionality should be checked. Element BI Inhibits Inrush Detector 51-1 51-2 50-1 50-2 2.1.5.2 ANSI Reset...
Page 278: Derived Earth Fault (50N,51N)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Derived Earth fault (50N,51N) Figure 2-4 Measured Earth Fault Voltage Inputs: None Current Inputs: W1-I ), W1-I ), W1-I ), or W2-I ), W2-I ), W2-I Disable: 50BF, 50, 51, 49, 37...
Page 279: Inverse Time Overcurrent (51N)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.2.1 Definite Time Overcurrent (50N) If DTL setting is small, gradually increase current until element operates. If DTL is large apply 0.9x setting, check for no operation, apply 1.1x setting, check operation...
Page 280: Ansi Reset
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.2.2.1 Element Blocking The Measured Earth Fault elements can be blocked by Binary Input Inhibit, VT Supervision and Inrush Detector operation. The Characteristic can be made non-directional by VT Supervision. This functionality should be checked.
Page 281: Measured Earth Fault (50G, 51G)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Measured Earth fault (50G, 51G) Figure 2-5 Measured Earth Fault Voltage Inputs: None Current Inputs: G1 , Disable: 50BF, 64H Map Pickup LED: 51G-n/50G-n - Self Reset Other protection functions may overlap with these functions during testing, it may be useful to disable some functions to avoid ambiguity.
Page 282: Inverse Time Overcurrent (51G)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.3.1 Definite Time Overcurrent (50G) If DTL setting is small, gradually increase current until element operates. If DTL is large apply 0.9x setting, check for no operation, apply 1.1x setting, check operation...
Page 283: Ansi Reset
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.3.2.1 Element Blocking The Measured Earth Fault elements can be blocked by Binary Input Inhibit, VT Supervision and Inrush Detector operation. The Characteristic can be made non-directional by VT Supervision. This functionality should be checked.
Page 284: Restricted Earth Fault (64H)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Restricted Earth fault (64H) Figure 2-6 Restricted Earth Fault Voltage Inputs: Current Inputs: G1 , Disable: 50G, 51G, 50BF Map Pickup LED: 64H-n - Self Reset The external stabilising resistor value should be measured and compared to that specified in the settings data.
Page 285 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide These elements can be enabled for the I or I current inputs by relay settings, ensure that current is injected on the correct input. Since the DTL setting is generally small the pick-up setting can be tested by gradually increasing current until element operates.
Page 286: Open Circuit (46Bc)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Open Circuit (46BC) Figure 2-7 Open Circuit Voltage Inputs: Current Inputs: W1-I ), W1-I ), W1-I ), or W2-I ), W2-I ), W2-I Disable: 51N, 46IT, 46DT Map Pickup LED: 46BC - Self Reset This function uses the ratio of NPS current to PPS current to detect an open circuit .
Page 287 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 46BC Setting 1P unbalance current (% of 3P current) 100% 129% 161% 200% 46BC Setting 3P balanced current (A) 1P unbalance current (A) Measured Unbalance current 46BC-1 46BC-2 Apply 1A 1P unbalance current without 3P balanced current. Measure 46BC operating time.
Page 288: Negative Phase Sequence Overcurrent (46Nps)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Negative Phase Sequence Overcurrent (46NPS) Figure 2-8 Negative Phase Sequence Overcurrent Voltage Inputs: Current Inputs: W1-I ), W1-I ), W1-I ), or W2-I ), W2-I ), W2-I Disable: 50, 51, 50BF, 87BD...
Page 289: Definite Time Nps Overcurrent (46Dt)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.6.1 Definite Time NPS Overcurrent (46DT) If DTL setting is small, gradually increase current until element operates. If DTL is large apply 0.9x setting, check for no operation, apply 1.1x setting, check operation...
Page 290 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.6.2.1 ANSI Reset If the element is configured as an ANSI characteristic, it may have a reset delay applied. If ANSI reset is selected for an IEC characteristic element, the reset will be instantaneous.
Page 291: Undercurrent (37, 37G)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Undercurrent (37, 37G) Figure 2-9 Undercurrent Voltage Inputs: Current Inputs: W1-I ), W1-I ), W1-I ), I or W2-I ), W2-I ), W2-I ), I Disable: 50N, 51N, 51G, 46, 87BD Map Pickup LED: 37-n, 37G-n - Self Reset 2.7.1...
Page 292: Elements
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Phase P.U. Current Operate Time NOTES (Amps) (sec) Amps 0.5 x Is Wn-I Wn-I Wn-I Wn-I Wn-I Wn-I Elements can be blocked by operation of a Binary Input Inhibit or by operation of the 37-n U/I Guard element.
Page 293: Thermal Overload (49)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Thermal Overload (49) Figure 2-10 Thermal Overload Voltage Inputs: Current Inputs: W1-I ), W1-I ), W1-I ), or W2-I ), W2-I ), W2-I Disable: 51, 50, 37, 46NPS, 50CBF, 87BD Map Pickup LED: 49 Alarm The current can be applied from a 3P balanced supply or phase by phase from a 1P supply.
Page 294 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Time Constant (mins) Operate Time (sec) 17.3 34.5 51.8 86.3 51.8 1726 The Thermal State must be in the fully reset condition in order to measure the operate time correctly. This can be achieved by setting change in the Thermal protection settings menu or by pressing the Test/Reset button when the Thermal Meter is shown in the Instruments Mode.
Page 295: Under/Over Voltage (27/59)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Under/Over Voltage (27/59) Figure 2-11 Phase Under/Over Voltage Voltage Inputs: Current Inputs: n/a apply zero current to stabilize other functions Disable: Map Pickup LED: 27/59-n - Self Reset Where more than one Undervoltage (27) elements are being used with different settings, it is convenient to test the elements with the lowest settings first.
Page 296 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Where more than one Overvoltage (59) elements are being used with different settings, it is convenient to test the elements with the highest settings first. The elements with lower settings can then be tested without disabling the higher settings.
Page 297: Undervoltage Guard (27/59Uvg)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.9.2 Undervoltage Guard (27/59UVG) If any 27 Undervoltage element is set to be inhibited by the 27 Undervoltage Guard element, this function should be tested. Connect the test voltage inputs to suit the installation wiring diagram utilising any test socket facilities available. It may be useful to temporarily map an LED as ‘General Pickup’...
Page 298: Neutral Over Voltage (59N)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.10 Neutral Over Voltage (59N) Figure 2-12 Neutral Overvoltage Voltage Inputs: Current Inputs: n/a apply zero current to stabilize other functions Disable: 27/59 Map Pickup LED: 59N-n - Self Reset ©2015 Siemens Protection Devices Limited...
Page 299: Definite Time (59Ndt)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.10.1 Definite Time (59NDT) If DTL setting is small, gradually increase single phase voltage until element operates. If DTL is large apply 0.9x setting, check for no operation, apply 1.1x setting, check operation...
Page 300: Under/Over Frequency (81)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.11 Under/Over Frequency (81) Figure 2-13 Under/Over Frequency Voltage Inputs: Current Inputs: n/a apply zero current to stabilize other functions Disable: Map Pickup LED: 81-n - Self Reset For Over-frequency, the elements with the highest setting should be tested first and for Under-frequency the elements with the lowest settings should be tested first.
Page 301 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide If the element is set as 81-n U/V Guarded, The applied voltage must be above the 81 UV Guard Setting in the U/O Frequency menu. Apply setting frequency +0.5Hz for Over-frequency or -0.5Hz for Under-frequency and record operating time.
Page 302: Overfluxing (24)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.12 Overfluxing (24) Figure 2-14 Under/Over Frequency The settings are set in terms of V/f based on multiple of nominal voltage and frequency. Application of a voltage of nominal voltage and frequency represents 1.0.
Page 303 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 2.12.2 inverse time (24IT) The inverse V/f element should be tested at each of the points specified by settings that constitute the overall inverse characteristics. Setting Setting Hysteresis Calculated P.U. D.O. Operate...
Page 304 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide ©2015 Siemens Protection Devices Limited Chapter 6 Page 50 of 62...
Page 305: Section 3: Supervision Functions
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Section 3: Supervision Functions CB Fail (50BF) Figure 3-1 CB Fail Voltage Inputs: Current Inputs: W1-I ), W1-I ), W1-I ), I or W2-I ), W2-I ), W2-I ), I Disable: Map Pickup LED:...
Page 306 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Apply a trip condition by injection of current to cause operation of a suitable protection element. Allow current to continue after the trip at a level of 110% of the 50BF Setting current level on any phase. Measure the time for operation of 50BF-1 Delay and 50BF-2 Delay.
Page 307: Trip/Close Circuit Supervision (74Tcs, 74Ccs)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Trip/Close Circuit Supervision (74TCS, 74CCS) Figure 3-2 Trip Circuit Supervision Voltage Inputs: Current Inputs: Disable: Map Pickup LED: 74TCS-n/74CCS-n - Self Reset The T/CCS-n Delay can be initiated by applying an inversion to the relevant status input and measured by monitoring of the alarm output.
Page 308: Magnetising Inrush Detector (81Hbl2)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Magnetising Inrush Detector (81HBL2) Figure 3-3 Magnetising Inrush Detector Voltage Inputs: Current Inputs: W1-I ), W1-I ), W1-I ), or W2-I ), W2-I ), W2-I Disable: Map Pickup LED: Logical operation of the harmonic blocking can be tested by injection of 2 harmonic current (at 100Hz for 50Hz relay) to cause operation of the blocking signals.
Page 309 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide A compromise test can be made by the use of a diode to generate a half-wave rectified waveform from a sinusoidal source. The half-wave rectified current will contain a combination of fundamental and harmonic currents.
Page 310: Overfluxing Detector (81Hbl5)
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Overfluxing Detector (81HBL5) Figure 3-4 Magnetising Inrush Detector Voltage Inputs: Current Inputs: W1-I ), W1-I ), W1-I ), or W2-I ), W2-I ), W2-I Disable: Map Pickup LED: Logical operation of the harmonic blocking can be tested by injection of 5 harmonic current (at 250Hz for 50Hz relay) to cause operation of the blocking signals.
Page 311: Section 4: Control & Logic Functions
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Section 4: Control & Logic Functions Quick Logic If this functionality is used, the logic equations may interfere with testing of other protection functions in the relay. The function of the Quick Logic equations should be tested conjunctively with connected plant or by simulation to assess suitability and check for correct operation on an individual basis with tests specifically devised to suit the particular application.
Page 312 Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide ©2015 Siemens Protection Devices Limited Chapter 6 Page 58 of 62...
Page 313: Section 5: Testing And Maintenance
It may however be convenient to fit the withdrawable relay to the outer case from a spare relay, to avoid the disturbance of relay panel wiring, for return to Siemens Protection Devices Ltd. The withdrawable relay should never be transported without the protection of the outer case.
Page 314: Troubleshooting
If the above checklist does not help in correcting the problem please contact the local Siemens office or contact PTD 24hr Customer Support, Tel: +49 180 5247000, Fax: +49 180 524 2471, e-mail: support.energy@siemens.com.
Page 315: Section 6: Relay Software Upgrade Instructions
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide Section 6: Relay Software Upgrade Instructions General Please read thoroughly all of the instructions supplied with the firmware upgrade before starting the download process. If you are loading firmware into a product that is already installed on site then follow the instructions in section 2, 3 and 4.
Page 316: Things To Do Before Loading New Firmware/Software
Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide 6.2.4 Things To Do Before Loading New Firmware/Software Ensure that a secure copy of relay settings is available as all settings will be lost during the code upload process. A hard copy is useful for checking purposes. It is usually possible to download the existing settings into Reydisp Evolution, save the file and then reload these settings into the relay following the upgrade.
Page 317 2010/06 Revisions to trip/close circuit supervision diagrams 2010/02 Document reformat due to rebrand 2010/02 Third issue. Software revision 2662H80001 R4c-3 2008/07 Second issue. Software revision 2662H80001R3d-2c. 2008/05 First issue ©2015 Siemens Protection Devices Limited Chapter 7 Page 1 of 64...
Page 319 6.1 The Effects of An In Zone Earthing Transformer ..............51 6.2 Protection of Star/Star Transformer With Tertiary Winding ..........53 6.3 Transformer with Primary Connections Crossed on Both Windings ........54 ©2015 Siemens Protection Devices Limited Chapter 7 Page 3 of 64...
Page 320 6.6 Reactor, Motor and Connections Protection ................ 58 Section 7: Common Functions ....................... 59 7.1 Multiple Settings Groups ....................59 7.2 Binary Inputs ........................60 7.3 Binary Outputs ........................63 7.4 LEDs ..........................63 ©2015 Siemens Protection Devices Limited Chapter 7 Page 4 of 64...
Page 321 Figure 7-3 – Binary Input Configurations Providing Compliance with EATS 48-4 Classes ESI 1 and ESI 2 ......................62 List of Tables Table 2-1 The Effect of ICT Selection on Protection Settings ............. 21 ©2015 Siemens Protection Devices Limited Chapter 7 Page 5 of 64...
Page 322 Resistance of stabilising resistor Turns ratio of all current transformers (Primary turns / Secondary turns) Maximum secondary internal fault voltage Fint Kneepoint voltage of the CT Vs = Relay circuit setting voltage ©2015 Siemens Protection Devices Limited Chapter 7 Page 6 of 64...
Page 323: Section 1: Introduction
Basic functionality includes overall differential protection and two restricted earth fault (REF) protections i.e. REF protection for each transformer winding. Optional current based and voltage based functionality can be used to provide integrated, comprehensive transformer protection. ©2015 Siemens Protection Devices Limited Chapter 7 Page 7 of 64...
Page 325: Section 2: Protection Functions
Magnetising inrush current which flows in only one winding of the transformer when energised. Generally the procedure to calculate relay settings is carried out in the following order: Figure 2-1 Procedure for calculating Overall Differential Protection Settings ©2015 Siemens Protection Devices Limited Chapter 7 Page 9 of 64...
Page 326: Ict Settings For Current Magnitude Balance
– the effects on settings must be taken into account - see section 2.1.5.1. Settings examples included in section 6 cover selected non-standard connection arrangements e.g. where the primary connections within the protected zone are crossed. ©2015 Siemens Protection Devices Limited Chapter 7 Page 10 of 64...
Page 327: Interposing Ct Selection Guide
D or d denotes a delta connection on the HV or LV side of the transformer respectively. Z or z denotes a zigzag connection of the HV or LV side of the transformer respectively ©2015 Siemens Protection Devices Limited Chapter 7 Page 11 of 64...
Page 328: Biased Differential (87Bd) Settings
100% safety margin, this provides contingency for CT and relay tolerances. For example if the tap change range is +10 to –20%, the overall range is 30% so a 0.3x setting is chosen. ©2015 Siemens Protection Devices Limited Chapter 7 Page 12 of 64...
Page 329 This setting can be used to prevent operation of the 87BD elements in the presence of allowable over-fluxing conditions - see section 5.2. 87BD Time Delay Setting A 5ms setting is recommended where the circuit is cabled to ensure stability during resonant conditions. ©2015 Siemens Protection Devices Limited Chapter 7 Page 13 of 64...
Page 330: Differential Highset (87Hs) Settings
87HS Delay Setting A 5ms setting is recommended to compensate for transient overreach. 87HS Inrush Action 87HS Overfluxing Action These functions are set to ‘Disabled’ unless specifically required by the application. ©2015 Siemens Protection Devices Limited Chapter 7 Page 14 of 64...
Page 331: Example 1 - New Installation (90Mva Yd11 Transformer)
2.1.5 Example 1 – New Installation (90MVA Yd11 Transformer) Fig. 2-4 New Transformer Application Figure 2-5: AC Connections - Example 1 ©2015 Siemens Protection Devices Limited Chapter 7 Page 15 of 64...
Page 332 HV Secondary current = HV ICT Multiplier = 1/0.98 = 1.02 1500 0.94A LV Secondary current = LV ICT Multiplier = 1/0.94 = 1.06 1600 Figure 2-6 ICT Settings – Example 1 ©2015 Siemens Protection Devices Limited Chapter 7 Page 16 of 64...
Page 333: Summary Of Required Settings
(Default value) Gn 81HBL2 Setting 0.2 x I (Default value) OUTPUT CONFIG>OUTPUT MATRIX> 87BD BOn, Ln 87HS BOn, Ln OUTPUT CONFIG>BINARY OUTPUT CONFIG> CB1 Trip Contacts CB2 Trip Contacts ©2015 Siemens Protection Devices Limited Chapter 7 Page 17 of 64...
Page 334 A- E fault causes current to flow in the A and C elements The Yd ICT connection reduces current flow by a factor of 1/ 3 Relay may indicate A and C faults ©2015 Siemens Protection Devices Limited Chapter 7 Page 18 of 64...
Page 335 B - C fault causes current to flow in the A, B and C elements The Yd ICT connection causes a 1:2:1 current distribution and introduces a 1/ 3 multiplying factor. Relay may indicate three phase fault ©2015 Siemens Protection Devices Limited Chapter 7 Page 19 of 64...
Page 336 W2 Internal Earth Fault Figure 2-9: Relay Currents - Delta Winding Internal Earth Fault W2 Internal Phase-Phase Fault Figure 2-10: Relay Currents - Delta Winding Internal Phase Fault ©2015 Siemens Protection Devices Limited Chapter 7 Page 20 of 64...
Page 337 A similar analysis can be carried for external (through) fault conditions. However as the protection settings already ensured stability for the maximum through fault condition (3-phase fault) this is not necessary. ©2015 Siemens Protection Devices Limited Chapter 7 Page 21 of 64...
Page 338: Example 2 - Relay Replacement (Dyn1 Transformer) Using Existing Cts
When the relay is in balance the phase angle of the currents applied to each phase of the differential algorithm will be in anti-phase. Figure 2-12: AC Connections - Example 2 ©2015 Siemens Protection Devices Limited Chapter 7 Page 22 of 64...
Page 339 HV Secondary current = HV ICT Multiplier = 1/0.66 = 1.54 747.9 LV Secondary current = LV ICT Multiplier = 1/0.77 = 1.30 Figure 2-13 Summary of ICT Settings ©2015 Siemens Protection Devices Limited Chapter 7 Page 23 of 64...
Page 340: Summary Of Protection Settings
(Default value) Gn 81HBL2 Setting 0.2 x I (Default value) OUTPUT CONFIG>OUTPUT MATRIX> 87BD BOn, Ln 87HS BOn, Ln OUTPUT CONFIG>BINARY OUTPUT CONFIG> CB1 Trip Contacts CB2 Trip Contacts ©2015 Siemens Protection Devices Limited Chapter 7 Page 24 of 64...
Page 341: Instantaneous Oc/Ef (50/50G/50N)
(EI) can provide improved grading with fuses or moulded case circuit breakers. To optimise the grading capability of the relay additional time multiplier, ‘Follower DTL’ (Figure 2-14) or ‘Minimum Operate Time’ (Figure 2-15) settings can be applied. ©2015 Siemens Protection Devices Limited Chapter 7 Page 25 of 64...
Page 342 Figure 2-14 IEC NI Curve with Time Multiplier and Follower DTL Applied 1000.00 100.00 10.00 1.00 0.10 0.01 1000 Current (x Is) Figure 2-15 IEC NI Curve with Minimum Operate Time Setting Applied ©2015 Siemens Protection Devices Limited Chapter 7 Page 26 of 64...
Page 343: Reset Delay
Figure 2-16 Overcurrent Reset Characteristics ©2015 Siemens Protection Devices Limited Chapter 7 Page 27 of 64...
Page 344: High Impedance Restricted Earth Fault (64H)
The relay current setting is calculated taking into account: the required operate level for in-zone earth faults (fault setting). ©2015 Siemens Protection Devices Limited Chapter 7 Page 28 of 64...
Page 345 CB failure or back up protection. The thermal rating of the relay circuit components should then be considered. Alternatively the high impedance circuit can be arranged to short circuit the external components after operation. ©2015 Siemens Protection Devices Limited Chapter 7 Page 29 of 64...
Page 346: Establishing The Required Stabilising Resistor Value
75mm or 150mm and have constant ‘C’ values of 450, 900 or 1000. Metrosils of diameter 75mm have a thermal rating of 8kJ. Where a higher thermal rating is required Metrosils of 150mm diameter should be used. ©2015 Siemens Protection Devices Limited Chapter 7 Page 30 of 64...
Page 347 For a failed circuit Fint breaker condition the back up protection clearance time must be considered – typically a one second rating is sufficient. 1SEC ©2015 Siemens Protection Devices Limited Chapter 7 Page 31 of 64...
Page 348: Open Circuit (46Bc)
As a fault current check i.e. that no fault current continues to flow and that an auto-isolation sequence may safely be initiated. As a check that a CB has opened – this can be used in addition to or in place of CB auxiliary switch indications. ©2015 Siemens Protection Devices Limited Chapter 7 Page 32 of 64...
Page 349: Thermal Overload (49)
The steady state % thermal capacity used can be calculated from: thermal capacity used Where: = applied current in terms of x I = thermal pick-up setting x I ©2015 Siemens Protection Devices Limited Chapter 7 Page 33 of 64...
Page 350 (pump or fan) occurs. The thermal settings applied will differ in each Setting Group and will be made appropriate to the specific load conditions. ©2015 Siemens Protection Devices Limited Chapter 7 Page 34 of 64...
Page 351: Under/Over Voltage (27/59)
DTL also prevents operation during transient disturbances. The use of IDMTL protection is not recommended because of the difficulty of choosing settings to ensure correct co-ordination and security of supply. ©2015 Siemens Protection Devices Limited Chapter 7 Page 35 of 64...
Page 352: Neutral Overvoltage (59N)
The external adaptor unit contains parallel switched capacitors that enable a wide range of values to be selected using a DIL switch and hence the Capacitor Cone output can be scaled to the standard relay input range. ©2015 Siemens Protection Devices Limited Chapter 7 Page 36 of 64...
Page 353 Network Incomer STAGE 1: Least important STAGE 2 Generator STAGE 3 300/5 STAGE 4 STAGE 5 STAGE 6 Essential Load Figure 2-22 Load Shedding Scheme Using Under-Frequency Elements ©2015 Siemens Protection Devices Limited Chapter 7 Page 37 of 64...
Page 354: Over Fluxing Protection (24)
In this case the inverse V/f curve should be set to [Disabled] and both DTL elements should be set to [Enabled]. The default DTL settings are adequate to protect almost all transformer designs, and can be used with confidence. ©2015 Siemens Protection Devices Limited Chapter 7 Page 38 of 64...
Page 355: Section 3: Ct Requirements
Where long secondary lead lengths are required measures can be taken to reduce the burden imposed on the CTs: Use high CT ratios to reduce the secondary current. Compensate the low secondary current using the ICT Multipliers.. Parallel CT secondary cable cores to reduce lead resistance. ©2015 Siemens Protection Devices Limited Chapter 7 Page 39 of 64...
Page 356: Ct Requirements For High Impedance Restricted Earth Fault (64H)
The knee-point voltage of the CTs must be greater than 2 x 64H Setting Voltage (Vs) – see section 2.4. A full explanation of how to specify CTs for use with REF protection, and set REF relays is available on our Website: www.siemens.com/energy ©2015 Siemens Protection Devices Limited Chapter 7 Page 40 of 64...
Page 357: User Defined Logic
CONTROL & LOGIC>QUICK LOGIC: E1 = I1.I2.V1 If required a time delay can be added to the output using the CONTROL & LOGIC > QUICK LOGIC: E1 Pickup Delay setting. ©2015 Siemens Protection Devices Limited Chapter 7 Page 41 of 64...
Page 359: Section 5: Supervision Functions
This setting is recommended if REF is not used to protect the windings for earth faults on effectively earthed power systems. The recommended setting that offers a good compromise between stability for typical inrush currents and fast operation for internal faults is 0.15 x Id. ©2015 Siemens Protection Devices Limited Chapter 7 Page 43 of 64...
Page 360: Overfluxing Detector (81Hbl5)
An increase in transformer or decrease in system frequency may result in the transformer becoming over-excited. The 81HBL5 element can be used to prevent protection operation e.g. prevent differential protection operation during acceptable over-excitation conditions. ©2015 Siemens Protection Devices Limited Chapter 7 Page 44 of 64...
Page 361: Circuit Breaker Fail (50Bf)
Relay CB to trip Sucessful Operation ms from fault occuring CB Operate Time Stage 1 CBF Timer (Backtrip) = 120ms Figure 5-2 - Single Stage Circuit Breaker Fail Timing ©2015 Siemens Protection Devices Limited Chapter 7 Page 45 of 64...
Page 362: Example Of Required Settings (E.g. Hv Cb)
Second Stage (Back Trip) First CBF Time Delay 120ms Trip Relay operate time 10ms DUOBIAS-M Reset Time 30ms CB Tripping time 50ms Margin 50ms Overall Second Stage CBF Time Delay 260ms ©2015 Siemens Protection Devices Limited Chapter 7 Page 46 of 64...
Page 363: Trip Circuit Supervision (74Tcs)
Scheme 1 provides full Trip and Close supervision with the circuit breaker Open or Closed. Where a ‘Hand Reset’ Trip contact is used measures must be taken to inhibit alarm indications after a CB trip. ©2015 Siemens Protection Devices Limited Chapter 7 Page 47 of 64...
Page 364 Scheme 3 (Comprehensive) – 19V Binary Input Only Figure 5-6: Trip Circuit Supervision Scheme 3 (H7) Scheme 3 provides full Trip and Close supervision with the circuit breaker Open or Closed. ©2015 Siemens Protection Devices Limited Chapter 7 Page 48 of 64...
Page 365: Close Circuit Supervision Connections
5.4.2 Close Circuit Supervision Connections Figure 5-7 Close Circuit Supervision Scheme Close circuit supervision with the circuit breaker Open or Closed. ©2015 Siemens Protection Devices Limited Chapter 7 Page 49 of 64...
Page 367: Section 6: Application Considerations And Examples
CT secondary connection of low impedance instead of in the differential relay operating coil. As we have already corrected for the transformer vector group on the star side a Ydy0 ICT is used on the delta side winding. ©2015 Siemens Protection Devices Limited Chapter 7 Page 51 of 64...
Page 368 Figure 6-2: Relay Currents – External Earth Fault with In Zone Earthing Transformer Figure 6-3 7SR24 Applied to Yd Transformer with an In Zone Earthing Transformer ©2015 Siemens Protection Devices Limited Chapter 7 Page 52 of 64...
Page 369: Protection Of Star/Star Transformer With Tertiary Winding
CT settings. The Interposing CT Connection setting on all sets of current inputs must be set to the same Yd setting e.g. all Yd1, -30° or all Yd11, 30°. ©2015 Siemens Protection Devices Limited Chapter 7 Page 53 of 64...
Page 370: Transformer With Primary Connections Crossed On Both Windings
– see section 6.5. A disadvantage is that ‘non-standard’ secondary wiring connections are used. Relay instruments will indicate ’transformer’ quantities rather than system quantities. ©2015 Siemens Protection Devices Limited Chapter 7 Page 54 of 64...
Page 371 An advantage of the approach above is that ‘standard’ secondary wiring connections are used. The 7SR24 relay setting correspond to the power system vector relationship i.e. Yd9, 90°. Relay instruments will indicate ’system’ quantities rather than transformer quantities. ©2015 Siemens Protection Devices Limited Chapter 7 Page 55 of 64...
Page 372: Transformer With Primary Connections Crossed On One Winding
The 7SR24 relay is set to correspond to the vector group shown on the main transformer rating plate i.e. Dy11, +30°. Relay instruments will indicate ’transformer’ quantities rather than system quantities. ©2015 Siemens Protection Devices Limited Chapter 7 Page 56 of 64...
Page 373: Protection Of Auto Transformers
CT inputs to Ydy0. The inrush inhibit (81HBL2) must be Enabled as the magnetising inrush currents in each phase will not balance. Fig. 6-8: AC Connections for Auto-Transformer Overall Protection Fig. 6-9: AC Connections for Auto-Transformer Overall and REF Protection ©2015 Siemens Protection Devices Limited Chapter 7 Page 57 of 64...
Page 374: Reactor, Motor And Connections Protection
87BD and 87BD 1 Bias Slope can both be set to 0.1. The inrush inhibit feature (81HBL2) must be enabled as the magnetising inrush currents in each phase will not balance. ©2015 Siemens Protection Devices Limited Chapter 7 Page 58 of 64...
Page 375: Section 7: Common Functions
Non essential loads tripped Relays on essential circuits switched to settings group 2 to reflect new load and fault currents RADIAL SUBSTATION Non-essential loads Figure 7-1 Example Use of Alternative Settings Groups ©2015 Siemens Protection Devices Limited Chapter 7 Page 59 of 64...
Page 376: Binary Inputs
LED indication and also have a parallel connection wired to directly trip the circuit via a blocking diode, see Figure 7-2: Figure 7-2 Example of Transformer Alarm and Trip Wiring ©2015 Siemens Protection Devices Limited Chapter 7 Page 60 of 64...
Page 377 Figure 7-3. AC Rejection The default pick-up time delay of 20ms provides immunity to ac current e.g. induced from cross site wiring. ©2015 Siemens Protection Devices Limited Chapter 7 Page 61 of 64...
Page 378 Resistors must be wired with crimped connections as they may run hot Figure 7-3 – Binary Input Configurations Providing Compliance with EATS 48-4 Classes ESI 1 and ESI 2 ©2015 Siemens Protection Devices Limited Chapter 7 Page 62 of 64...
Page 379: Binary Outputs
LEDs are used to display features which routinely change state, such as Circuit-Breaker open or close. The status of hand reset LEDs is retained in capacitor-backed memory in the event of supply loss. ©2015 Siemens Protection Devices Limited Chapter 7 Page 63 of 64...
Page 382 Siemens Protection Devices Limited P.O. Box 8, North Farm Road Hebburn, Tyne & Wear NE31 1TZ United Kingdom Phone: +44 (0)191 401 7901 Fax: +44 (0)191 401 5575 E-mail: marketing.spdl.gb@siemens.com For enquires please contact our Customer Support Center Phone: +49 180/524 8437 (24hrs)

Siemens 7SR242 Duobias Technical Manual

Table of Contents

Section 1: Introduction/Section 2: Setting the Relay Using Reydisp

Section 1: Common Functions/Section 2: Protection Functions

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