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Siemens SIRIUS 3RU Manual

Industrial controls, protection devices, thermal/electronic overload relays
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Industrial Controls
Protection Devices
SIRIUS - Thermal Overload Relays SIRIUS 3RU / Electronic Overload Relays SIRIUS 3RB
Gerätehandbuch
Manual
Edition
09/2016
siemens.com

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Summary of Contents for Siemens SIRIUS 3RU

  • Page 1 Industrial Controls Protection Devices SIRIUS - Thermal Overload Relays SIRIUS 3RU / Electronic Overload Relays SIRIUS 3RB Gerätehandbuch Manual Edition 09/2016 siemens.com...
  • Page 3 ___________________ SIRIUS 3RU thermal overload relays / Introduction SIRIUS 3RB electronic overload relays ___________________ Standards ___________________ Industrial Controls Product description ___________________ Product combinations Protection devices SIRIUS 3RU thermal overload ___________________ relays / SIRIUS 3RB electronic Functions overload relays ___________________ Configuration...
  • Page 4 Note the following: WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems.

  • Page 5: Table Of Contents

    Protection against overload, phase failure, and phase asymmetry ........49 5.1.1 Functional principle ......................... 49 5.1.2 Inverse-time delayed overload release ................... 50 5.1.3 Tripping classes ........................50 5.1.4 Tripping characteristics ......................51 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 6 Conductor cross-sections for screw-type connection systems ..........103 8.4.2 Conductor cross-sections for spring-loaded connection systems ........110 8.4.3 Conductor cross-sections for ring cable lug connection system .......... 112 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 7 Description ..........................143 10.9.2 Mounting ..........................144 Technical data ............................ 147 11.1 Technical data in Siemens Industry Online Support ............. 147 11.2 Overview tables ........................148 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 8 Dimension drawings for 3RB30/3RB31 electronic overload relays ........182 Drilling diagram for 3RT contactors ..................194 Dimension drawings and drilling plan for 3RU29.6 stand-alone assembly supports ... 198 Index ..............................203 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 9: Introduction

    Nor can Siemens assume liability for recommendations that appear or are implied in the following description. No new guarantee, warranty, or liability claims beyond the scope of the Siemens general terms of supply are to be derived or inferred from the following description. Note With regard to the design of a system, comply with all valid national installation specifications and standards.

  • Page 10: Advantages Through Energy Efficiency

    1.3 Advantages through energy efficiency Advantages through energy efficiency Siemens offers you a unique portfolio for efficient energy management in industry – a process that serves to optimally shape your energy requirement. Operational energy management is subdivided into three phases: ●...

  • Page 11: Siemens Industry Online Support

    Siemens Industry Online Support Information and Service In Siemens Industry Online Support, you can obtain up-to-date information from our global support database quickly and simply. To accompany our products and systems, we offer a wealth of information and services that provide support in every phase of the lifecycle of your machine or plant –...

  • Page 12: Further Documentation

    You can find a list of operating instructions and an overview of the manuals pertaining to the SIRIUS modular system in the Appendix "References (Page 167)". SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 13: Datamatrix Code

    Siemens Industry Online Support app Siemens Industry Online Support app You can use the Siemens Industry Online Support app to access all the device-specific information available on the Siemens Industry Online Support portal for a particular article number, including operating instructions, manuals, datasheets, FAQs etc.

  • Page 14: Recycling And Disposal

    You can obtain further assistance by calling the following numbers: Technical Assistance: Telephone: +49 (911) 895-5900 (8 a.m. to 5 p.m. CET) Fax: +49 (911) 895-5907 or on the Internet at: E-mail: (mailto:technical-assistance@siemens.com) Internet: (http://www.siemens.com/sirius/technical-assistance) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 15: Standards

    Technical data (Page 147). SIRIUS components have been approved by a whole range of bodies for various sectors (shipbuilding, etc.). An up-to-date list of approvals is provided in the appendix of the Siemens IC 10 Catalog - "SIRIUS Industrial Controls". You will find more information and downloadable certificates on the Internet (https://support.industry.siemens.com/cs/ww/en).
  • Page 16 Standards 2.1 Standards SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 17: Product Description

    S00 to S3 up to 115 A. 3RB20 and 3RB21 electronic overload relays are available in sizes S6 to S10 / S12 up to 630 A. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 18 As an alternative, 3RB20 / 3RB21 electronic overload relays in sizes S6 to S10 / S12 can be connected to the main circuit via busbars. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 19: Versions

    120 mm 50 ... 200 A 690 V AC S10 / S12 145 mm 55 ... 250 A to 690 V AC 160 ... 630 A SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 20 3RB30/3RB31. This is necessary, for example, if increased overload protection is required (wide setting ranges (1:4), for example, or even reduced power loss and, as a result, minimized energy consumption). SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 21: Applications

    (no protection for DC loads) must be used for IO-Link. Reference More information ... Can be found in the chapter titled ... About overload relay applications Configuration (Page 59) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 22 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 23: 3Ru21 Thermal Overload Relays

    Label Terminal labels 2/T1 Main circuit terminals 4/T2 6/T3 NC contact (NC 95-96) NO contact (NO 97-98) 14/22 Feed-through contactor auxiliary switch Feed-through contactor coil terminal SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 24 RESET modules (accessories) which are compatible for use with all sizes. ⑨ Label Terminal labels 2/T1 Main circuit terminals 4/T2 6/T3 NC contact (NC 95-96) NO contact (NO 97-98) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 25 RESET modules (accessories) which are compatible for use with all sizes. ⑨ Label Terminal labels 2/T1 Main circuit terminals 4/T2 6/T3 NC contact (NC 95-96) NO contact (NO 97-98) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 26 A sealable transparent cover can be optionally mounted on the thermal overload relays in the sizes S00, S0, S2 and S3 (Accessories (Page 123)). It stops the motor setting being tampered with. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 27 3.4 3RU21 thermal overload relays Auxiliary contacts 3RU21 thermal overload relays are equipped with an NO contact for the "tripped" message and an NC contact for disconnecting the contactor. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 28: 3Rb20 Electronic Overload Relays

    Enables a test of all major device components and functions. ⑤ Control circuit terminal (removable): A screw-type or spring-loaded system can be used to connect the control circuit terminal. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 29 The large rotary button provides an easy means of setting the device to the rated motor current. ⑩ Label Terminal labels NC contact (NC 95-96) NO contact (NO 97-98) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 30 Connection with box terminal block • ⑦ Selector switch for manual/automatic RESET and RESET button: The slide switch is used to choose between manual and automatic RESET. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 31 Auxiliary contacts 3RB20 / 3RB30 electronic overload relays are equipped with an NO contact for the "tripped" message and an NC contact for disconnecting the contactor. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 32: 3Rb21 Electronic Overload Relays

    Enables a test of all major device components and functions. ⑥ Control circuit terminal (removable): A screw-type or spring-loaded system can be used to connect the control circuit terminal. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 33 The large rotary button provides an easy means of setting the device to the rated motor current. ⑪ Label Terminal labels NC contact (NC 95-96) NO contact (NO 97-98) Terminals for electrical remote RESET SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 34 A screw-type or spring-loaded system can be used to connect the control circuit terminal. ⑦ Main circuit connection: The following variants of connection to the main circuit are possible: Bus connection system • Connection with box terminal block • SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 35 Auxiliary contacts 3RB21 / 3RB31 electronic overload relays are equipped with an NO contact for the "tripped" message and an NC contact for disconnecting the contactor. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 36: 3Rb30 Solid-State Overload Relays

    Label / Data Matrix code (behind the label) Terminal labels 2/T1 Main circuit terminals 4/T2 6/T3 NC contact (NC 95-96) NO contact (NO 97-98) 14/22 Feed-through contactor auxiliary switch Feed-through contactor coil terminal SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 37 ⑨ Label / Data Matrix code (behind the label) Terminal labels 2/T1 Main circuit terminals 4/T2 6/T3 NC contact (NC 95-96) NO contact (NO 97-98) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 38 ⑨ Label / Data Matrix code (behind the label) Terminal labels 2/T1 Main circuit terminals 4/T2 6/T3 NC contact (NC 95-96) NO contact (NO 97-98) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 39 A sealable transparent cover can be optionally mounted on the electronic overload relays in the sizes S00, S0, S2 and S3 (Accessories (Page 123)). It stops the motor setting being tampered with. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 40 Auxiliary contacts 3RB20 / 3RB30 electronic overload relays are equipped with an NO contact for the "tripped" message and an NC contact for disconnecting the contactor. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 41: 3Rb31 Solid-State Overload Relays

    The large rotary button provides an easy means of setting the device to the rated motor current. ⑫ Label / Data Matrix code (behind the label) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 42 Main circuit terminals 4/T2 6/T3 NC contact (NC 95-96) NO contact (NO 97-98) 14/22 Feed-through contactor auxiliary switch Feed-through contactor coil terminal Terminals for electrical remote RESET SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 43 Label / Data Matrix code (behind the label) Terminal labels 2/T1 Main circuit terminals 4/T2 6/T3 NC contact (NC 95-96) NO contact (NO 97-98) Terminals for electrical remote RESET SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 44 Label / Data Matrix code (behind the label) Terminal labels 2/T1 Main circuit terminals 4/T2 6/T3 NC contact (NC 95-96) NO contact (NO 97-98) Terminals for electrical remote RESET SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 45 Data Matrix code ⑩ Motor current setting: The large rotary button provides an easy means of setting the device to the rated motor current. ⑪ Label SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 46 Auxiliary contacts 3RB21 / 3RB31 electronic overload relays are equipped with an NO contact for the "tripped" message and an NC contact for disconnecting the contactor. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 47: Product Combinations

    System (Page 168)" More information ... can be found in the Chapter ... on the overload relay and contactor combination "Overview of combinable 3RT2 contactors options (Page 61)" SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 48 Product combinations SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 49: Functions

    If a 3RU21 thermal overload relay is to be used to protect DC loads or single-phase AC loads, all the bimetal strips have to be heated. Therefore, all of the relay's main current paths have to be connected in series. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 50: Inverse-Time Delayed Overload Release

    2 < t ≤ 10 CLASS 10 4 < t ≤ 10 CLASS 20 6 < t ≤ 20 CLASS 30 9 < t ≤ 30 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 51: Tripping Characteristics

    The limit tripping current determines the progression of the tripping characteristic curve up to higher tripping currents based on the characteristics of the tripping classes (CLASS 10, CLASS 20, etc., see the Chapter Tripping classes (Page 50)). SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 52 I t [s] Tripping time I [A] Current 3-pole load 2-pole load Figure 5-1 Time-current characteristic curve, schematic diagram - 3RU21 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 53 RB31 Reference The figures are schematic representations of the characteristic curves. The characteristic curves for the individual overload relays can be downloaded from the Internet (https://support.industry.siemens.com/cs/ww/en/ps/16269/char). SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 54: Ground-Fault Protection In The Case Of 3Rb21 / 3Rb31

    Chapter ... about ground-fault protection of the electronic Contactor assembly for star-delta (wye-delta) start overload relays in conjunction with star-delta (Page 63) (wye-delta) assemblies SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 55: Auxiliary Contacts

    Technical data (Page 147). Reference More information ... Can be found in the chapter titled ... About the response of auxiliary contacts Response of the auxiliary contacts (Page 121) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 56: Indication Of The Operating State

    (self-monitoring) and trip in the event of an internal error. In such cases you need to contact Technical Assistance on the Internet (http://www.siemens.com/sirius/technical-assistance) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 57: Additional Functions

    NC contact (95-96) and closes the NO contact (97-98), thereby checking that the auxiliary circuit has been wired to the overload relay correctly. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 58 More information ... Can be found in the Chapter ... About the RESET function RESET after release (Page 117). About the test function TEST function (Page 120). SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 59: Configuration

    Internet. Here, you can gather together all necessary products before the actual configuration process and you can realize complete projects virtually. You can find the "SIRIUS system configurator" on the Internet (http://www.siemens.com/sirius/configurators). SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 60: Overload Relays In Motor Feeders

    Appropriate contactors are required to protect loads. Chapter Overview of combinable 3RT contactors (Page 61) provides an overview of the coordination between overload relays and contactors, along with their power ratings. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 61: Overview Of Combinable 3Rt Contactors

    (https://support.industry.siemens.com/cs/ww/en/view/39714188) provides information about the assembly of type-tested motor feeders according to IEC / EN 60947-4-1 with type of coordination 1 or 2. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 62: Normal And Heavy-Duty Starting

    (for the acceleration of large centrifuges, for example). In the case of heavy- duty starting, the cables and contactors also have to be dimensioned specifically on account of the increasing thermal load. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 63: Contactor Assembly For Star-Delta (Wye-Delta) Start

    The overload relay interprets these harmonics as a ground fault and they produce unintentional tripping. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 64: Operation With Frequency Converters

    About the currents to be set "References" under "Manuals - SIRIUS Modular System (Page 168)" in the "SIRIUS Innovations - SIRIUS 3RV motor starter protectors" manual. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 65: Short-Circuit Protection

    "Configuring SIRIUS Modular corresponding short-circuit Systems - Selection data for load feeders in fuseless and fused protective devices with overload designs" relays (http://support.automation.siemens.com/WW/view/en/50250592) (article no.: 3ZX1012-0RA21-1AC0) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 66: Protecting Explosion-Protected Motors

    3RU21 thermal overload relays in sizes S00 to S2 (size S3 on request) are certified according to the international standard IECEx. You will find certificates of explosion protection in accordance with the international standard IECEx on the Internet (https://support.industry.siemens.com/cs/ww/en/ps/16271/cert). SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 67: Safety Instructions For Use In Hazardous Areas (3Rb)

    ● EN 60079-17 Inspection and maintenance of electrical installations in hazardous areas ● EN 50495 Safety devices required for the safe functioning of equipment with respect to explosion risks SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 68 All work involved in connecting, commissioning and maintenance must be carried out by qualified, responsible personnel. Improper handling may result in serious personal injury and considerable damage to property. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 69: Installation And Commissioning

    Choose the trip class so that the motor is thermally protected even with a blocked rotor. The motor, cables, and contactor must be dimensioned for the selected trip class. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 70 An impermissibly high cable surface temperature must be avoided by correctly dimensioning the cross sections. An adequate conductor cross section must be chosen for heavy starting (CLASS 20 and CLASS 30). SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 71 ● The phase currents must be at least as high as the value of the bottom current setting marker. Required loading with CLASS 5E CLASS 10E CLASS 20E CLASS 30E the rated current prior to pressing the TEST button [minutes] SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 72 Correct functioning of the device is ensured only if both criteria are met. The device may no longer be used if the test could not be carried out successfully. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 73 "Operation with frequency converters (Page 64)." Ambient conditions Permissible ambient temperature range: ● Storage / transport: –40 °C ... +80 °C ● Operation: –25 °C ... +60 °C SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 74: Safety Data

    -25 ... +60 Operation • °C Temperature compensation • Permissible rated operating current • - At 60 °C cabinet interior temperature % - 70 °C % On request SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 75: Maintenance And Repair

    You can find further information on 3RB20 / 3RB21 and 3RB30 / 3RB31 electronic overload relays in Catalog IC 10 "SIRIUS Industrial Controls" and on the Internet (https://support.industry.siemens.com/cs/ww/en). SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 76: Application Environment

    Operating conditions and resistance to extreme climates The overload relays are climate-proof. The overload relays are not sensitive to external influences such as shocks, corrosive ambient conditions, ageing, and temperature fluctuations. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 77 Ambient temperature in °C Reduction factor applies for rated current ... 25 ... 32 A 40 ... 63 A 75 ... 100 A 0.94 0.95 0.97 0.88 0.90 0.94 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 78 160 ... 630 A 100 % 70 % 3RB2066-2M 3RB2163-4M No reduction in the maximum permissible rated operating current is required for size S00 (to 16 A). SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 79 SIRIUS components have been approved by a whole range of bodies for various sectors (shipbuilding, etc.). Up-to-date information and certificates are available for download on the Internet (https://support.industry.siemens.com/cs/ww/en/ps/16269/cert). SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 80 Configuration 6.6 Application environment SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 81: Mounting

    The cable is threaded through and fitted directly on the contactor. 3RB2 / 3RB3 electronic overload relays with through-hole technology are available from size S2 onwards. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 82: Minimum Clearances And Mounting Position

    Overload relay, stand-alone assembly Contactor + overload relay 3RB20 / 3RB21 and 3RB30 / 3RB31 electronic overload relays can be mounted in any position in stand-alone assembly. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 83: Mounting/Disassembly

    This pushes the main current contacts into the corresponding socket contacts on the contactor. ② Screw the main conductor terminals tight on the contactor. Check that the cable is clamped tight. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 84 (see below, a), with the contacts flush to the right. Make sure that the guide tabs are inserted into the designated slots on the contactor. The overload relay will sit flush with the contactor on the left- and right-hand sides. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 85 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 86 Disassembling 3RU21 thermal overload relays with screw connection ① Undo the screw on the main conductor terminals. ② Pull the overload relay down and away from the contactor. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 87 Ring cable lug connection system The procedure for disassembling the overload relays with ring cable lug connection system is similar to that for disassembly with screw-type connection system. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 88: Thermal And Electronic Overload Relays (S2 / S3)

    Position the contactor/relay combination on the top edge of the DIN rail and press it down until it snaps onto the bottom edge of the DIN rail. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 89 Disassembly (sizes S2 and S3) 3RB3 electronic overload relay disassembly ① Undo the screws on the main conductor terminals. ② Pull the overload relay down and away from the contactor. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 90: Electronic Overload Relays (S6)

    As shown in the figure, slide the terminal covers for covering the busbars into the openings provided on the box terminal block of the electronic overload relay and on the contactor. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 91 As shown in the figure, slide the cover for the box terminal blocks into the openings provided on the box terminal block of the electronic overload relay and on the contactor. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 92 ③ As shown in the figure, slide the cover for the box terminal block into the openings provided on the contactor. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 93 Slide the screwdriver into the opening on the electronic overload relay as shown in the figure and press it down. ② Pull the electronic overload relay toward you. ③ Pull the electronic overload relay down and away from the contactor. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 94 3RB205 electronic overload relays in size S6 are suitable for screw and snap mounting on 35 mm DIN rails without an additional terminal support for stand-alone installation. 3RB2 electronic overload relay installation on DIN rail SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 95: Solid State Overload Relays (S10 / S12)

    ④ As shown in the illustration, break a side section out of the terminal cover for covering the busbars. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 96 As shown in the figure, slide the terminal cover for the box terminal block into the openings provided on the box terminal block of the electronic overload relay. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 97 ② Slightly lever open the box terminal block to dislodge it. ③ Detach the box terminal block from the electronic overload relay in the upward direction. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 98 Mounting 7.3 Mounting/Disassembly SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 99: Connection

    – Main circuit: screw connection with box terminal (ring terminal lug connection or busbar connection after removal of the box terminal block is optionally possible) – Auxiliary circuit: optionally screw or spring-loaded connection SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 100 In the case of size S00 3RU21 thermal overload relays and 3RB30 / 3RB31 electronic overload relays, direct contactor mounting involves the feed-through of the auxiliary switch and coil terminals A2 on the contactor. This makes wiring much easier. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 101 3RU2 and 3RB3 devices (sizes S2 and S3) have degree of protection IP00 in the area of the main circuit connecting terminals. 3RB2 (size S6) and 3RB3 (sizes S2 and S3) devices with through-hole connection technology have degree of protection IP20. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 102: Connection Of 3Ru21 Overload Relay

    ... about connecting the SIRIUS modular system in the appendix "References" under Manuals - SIRIUS Modular System (Page 168) in the "SIRIUS - System Overview" manual. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 103: Connection Cross-Sections

    2 x (0.75 to 2.5) mm² 2 x (20 to 16) 2 x (18 to 14) 2 x 12 Only 1 conductor can be clamped on the stand-alone assembly support. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 104 1 x (1 to 35) mm² 2 x (18 to 2) 1 x (18 to 1) Only 1 conductor can be clamped on the stand-alone assembly support. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 105 2 x (2.5 ... 35) mm² 1 x (2.5 ... 50) mm² Ribbon cables 2 x (6 x 9 x 0.8) 2 x (10 to 1/0) 1 x (10 to 2/0) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 106 1 x (3 x 9 x 0.8 ... 10 x 15.5 x 0.8) 2 x (max. 1/0) 2 x (max. 3/0) 1 x (6 ... 2/0) 1 x (6 ... 250 kcmil) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 107 2 x (2/0 ... 500 kcmil) Front clamping point only: 1 x (3/0 ... 600 kcmil) Rear clamping point only: 1 x (250 ... 500 kcmil) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 108 18 mm. Table 8- 9 Main conductor connection of size S6 with through-hole technology Electronic overload relay The maximum diameter of the opening is 24.5 mm. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 109 2 x (0.5 to 2.5) mm² Finely stranded with end sleeve 1 x (0.5 to 2.5) mm² 2 x (0.5 to 1.5) mm² 2 x (20 to 14) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 110: Conductor Cross-Sections For Spring-Loaded Connection Systems

    Finely stranded without end sleeve 1 x (1.0 to 6.0) mm² Finely stranded with end sleeve 1 x (1.0 to 6.0) mm² 1 x (18 to 8) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 111 Finely stranded without end sleeve 2 x (0.25 to 1.5) mm² Finely stranded with end sleeve 2 x (0.25 to 1.5) mm² 2 x (24 to 16) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 112: Conductor Cross-Sections For Ring Cable Lug Connection System

    Tool Pozidriv size 2, Ø 5 to 6 mm Tightening torque 2.0 to 2.5 Nm Ring cable lug = min. 4.3 mm = max. 12.2 mm SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 113 ● UL 224 approved ● Flame-protected DANGER Hazardous voltage. Will cause death or serious injury. Only use approved ring cable lugs to meet the required clearances and creepage distances. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 114 When connecting cable lugs in accordance with DIN 46234 for conductor cross-sections from 240 mm , as well as DIN 46235 for cable cross-sections from 185 mm , use the 3RT1966-4EA1 terminal cover to ensure phase spacing. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 115: Operation

    The figure below shows how to set the rated motor current based on the example of the 3RU21 thermal overload relay, size S0. Figure 9-1 Setting the current I SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 116: Setting The Tripping Class/Ground-Fault Detection (3Rb21 / 3Rb31)

    There are 8 possible settings: ● CLASS 5E, 10E, 20E and 30E without ground-fault detection (STANDARD) ● CLASS 5E, 10E, 20E and 30E without ground-fault detection (Gnd-FAULT) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 117: Reset After Release

    If, in the event of an overload release, the electronic overload relay is used without external thermistor protection (e.g. 3RN thermistor motor protection relay), the motor may only be switched in by properly qualified personnel. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 118 Switching between manual and automatic on the 3RU21 thermal overload relay ① Press the blue RESET button down with a screwdriver. ② Turn the blue RESET button to M (manual reset) or A (automatic reset). SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 119 Using a screwdriver, slide the switch to the required position. Reference More information ... Can be found in the Chapter ... about optional mechanical and electrical RESET Accessories (Page 123) modules SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 120: Test Function

    TEST slide is released. The relay must be reset with the RESET button if it has been set to manual RESET. Figure 9-3 Resetting following device test SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 121: Response Of The Auxiliary Contacts

    The table below shows how the auxiliary contacts respond when the TEST, STOP (3RU21 only), and RESET buttons are pressed. READY TEST STOP RESET NC 95/96 NO 97/98 Switch position indicator 3RB2 / 3RB3 Switch position indicator 3RU21 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 122 Operation 9.5 Response of the auxiliary contacts SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 123: Accessories

    Terminal covers for screw connection (sizes S6 ✓ ✓ and S10 / 12 only) Box terminal blocks (sizes S6 and S10 / 12 only) ✓ ✓ SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 124: Terminal Support For Stand-Alone Assembly

    A terminal support can be mounted on the thermal overload relay as well as on the electronic overload relay. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 125: Mounting/Disassembly

    Mounting the terminal support (screw-type connection system) size S00 / S0 ① Guide the overload relay into the terminal support from below. ② Screw the contacts tight. Check that the cables are clamped tight. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 126 Mounting the terminal support (screw-type connection system) size S2 / S3 ① Guide the overload relay into the terminal support from below with a swivel movement. ② SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 127 Position the screwdriver on the terminal support as shown in the figure. Carefully dislodge the overload relay from the contactor. ③ Pull the overload relay forward and away from the terminal support. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 128 Release the overload relay by pushing down the clip on the rear of the terminal support. ⑤ Pull the overload relay forward and away from the terminal support with a swivel movement. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 129: Mechanical Remote Reset

    SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 130: Mounting/Disassembly

    Fit the pushbutton (3SU1200-0FB10-0AA0) in the front cover. ⑤ (Optional) Attach the pushbutton to the extension plunger (3SU1900-0KG10-0AA0). Note Continuous operation of the RESET button is not permissible. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 131: Cable Release

    The cable is available in the following lengths: ● 400 mm and ● 600 mm SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 132: Mounting/Disassembly

    Turn off and lock out all power supplying this device before working on this device. The cable pull must not come into contact with live parts. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 133 3RU21 thermal overload relay: Cable release disassembly ① Press the locking latch down. ② Tilt the module toward you and take it off the overload relay. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 134: Module For Electrical Remote Reset (3Ru21 Only)

    The electrical remote RESET module is available for the following voltages: 24 to 30 V AC/VDC • 110 to 127 V AC/VDC • 220 to 250 V AC/VDC • SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 135: Mounting/Disassembly

    Disassembling the electrical remote RESET module from the thermal overload relay ① Press the locking latch down. ② Tilt the module toward you and take it off the overload relay. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 136: Sealable Cover

    3RB3 for electronic overload relays can be used to protect the rotary button for setting the rated motor current and the CO contact for the tripping classes (3RB21 / 3RB31 only) against unauthorized manipulation. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 137: Mounting

    Attach the hooks on the cover in the openings on the overload relay. ② Tilt the cover down. ③ Seal the cover to secure it against unauthorized removal. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 138 Attach the hooks on the cover in the openings on the overload relay. ② Tilt the cover up. ③ Seal the cover to secure it against unauthorized removal. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 139: Covers For Ring Cable Lug Connections

    For connection of conductors with ring cable lugs, the box terminal blocks of the size S3 devices can be detached. You will find the available terminal covers in Chapter "Terminal cover for cable lug connection and busbar connection (Page 140)". SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 140: Terminal Cover For Cable Lug Connection And Busbar Connection

    S3 devices can be detached. The terminal cover is available as touch protection and to ensure the necessary clearances and creepage distances when box terminal blocks have been removed. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 141: Mounting

    Detach the detachable box terminal block from the overload relay in the downward direction. ④ Slide the terminal cover for cable lug connection and busbar connection into the guide tabs on the overload relay. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 142: Terminal Covers For Box Terminal Block

    3RU21 thermal overload relay in size S3. ① Slide the terminal cover for the box terminal block into the openings provided on the box terminal block of the overload relay. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 143: Box Terminal Block

    Box terminal block Box terminal blocks for round conductors and for ribbon cables are each available for the electronic overload relays (sizes S6 and S10 / S12). SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 144: Mounting

    As shown in the figure, slide the terminal cover for the box terminal block into the openings provided on the box terminal block of the electronic overload relay. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 145 ② Slightly lever open the box terminal block to dislodge it. ③ Detach the box terminal block from the electronic overload relay in the upward direction. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 146 Accessories 10.9 Box terminal block SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 147: Technical Data

    Technical data in Siemens Industry Online Support Technical data sheet You can find all the technical data of the product in the Siemens Industry Online Support (https://support.industry.siemens.com/cs/ww/en/ps/16269/td). 1. Enter the full article number of the desired device in the "Product" field, and confirm with the Enter key.

  • Page 148: Overview Tables

    0.1 ... 115 A 50 ... 630 A Allows straightforward and • current range consistent configuration with one series of overload relays (for small to large loads) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 149: Protection Functions - Overview

    (can be Eliminates the need for additional special • activated) equipment Saves space in the control cabinet • Reduces wiring time and wiring costs • SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 150: Equipment

    Enable shutdown of the connected • contactor to protect the load Via a separate module. Only on the 3RB21 / 3RB31 electrically with 24 V DC. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 151: Features Of Overload Relays

    As SIRIUS 3RU21 thermal overload relays work on the basis of the bimetal principle, they do not require a control supply voltage. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 152 Technical data 11.3 Performance features SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 153: Circuit Diagrams

    Circuit diagrams 12.1 CAx data You can find the CAx data in the Siemens Industry Online Support (https://support.industry.siemens.com/cs/ww/en/ps/16269/td). 1. Enter the full article number of the desired device in the "Product" field, and confirm with the Enter key. 2. Click the "CAx data link.

  • Page 154: Internal Circuit Diagrams 3Ru2

    Thermal overload relay, screw-type and ring cable lug connection systems, S00 3RU2116-..C. Figure 12-2 Thermal overload relay, spring-loaded connection system, S00 3RU2126-..Figure 12-3 Thermal overload relay, S0 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 155 Circuit diagrams 12.2 Internal circuit diagrams 3RU2 3RU2136-..Figure 12-4 Thermal overload relay, S2 3RU2146-..Figure 12-5 Thermal overload relay, S3 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 156: 3Rb20 Internal Circuit Diagrams

    3RB20 internal circuit diagrams 3RB20 internal circuit diagrams 3RB205. Figure 12-6 3RB20, S6 electronic overload relay 3RB206. Figure 12-7 3RB20 electronic overload relay, sizes, S10 / S12 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 157: 3Rb21 Internal Circuit Diagrams

    3RB21 internal circuit diagrams Internal circuit diagrams for 3RB21 3RB2153 Figure 12-8 3RB21, S6 electronic overload relay 3RB2163 Figure 12-9 3RB21, S10 / S12 electronic overload relay SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 158: Internal Circuit Diagrams 3Rb30

    Figure 12-10 3RB30 electronic overload relay, screw-type connection system, S00 3RB3016-..E. Figure 12-11 3RB30 electronic overload relay, spring-loaded connection system, S00 3RB3026-..Figure 12-12 3RB30 electronic overload relay, S0 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 159 Circuit diagrams 12.5 Internal circuit diagrams 3RB30 3RB3036-..Figure 12-13 3RB30 electronic overload relay, S2 3RB3046-..Figure 12-14 3RB30 electronic overload relay, S3 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 160: Internal Circuit Diagrams 3Rb31

    Figure 12-15 3RB31 electronic overload relay, screw-type connection system, S00 3RB3113-..E. Figure 12-16 3RB31 electronic overload relay, spring-loaded connection system, S00 3RB3123-..Figure 12-17 3RB31 electronic overload relay, S0 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 161 Circuit diagrams 12.6 Internal circuit diagrams 3RB31 3RB3133-..Figure 12-18 3RB31 electronic overload relay, S2 3RB3143-..Figure 12-19 3RB31 electronic overload relay, S3 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 162: Wiring Examples

    12.7 Wiring examples 12.7 Wiring examples Typical circuit diagrams for 3RU Figure 12-20 3RU Typical circuit diagrams for 3RB ① Electrical remote RESET (3RB31 only) Figure 12-21 3RB3.1.-..B0 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 163 12.7 Wiring examples ① Electrical remote RESET (3RB21 / 3RB31 only) Figure 12-22 3RB3.1.-..E0 3RB3.2.-..B0 3RB3.2.-..E0 3RB2. ① Electrical remote RESET (3RB31 only) Figure 12-23 3RB3.3.-... SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 164 Circuit diagrams 12.7 Wiring examples SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 165: Types Of Coordination

    The load feeder can resume operation without needing to be renewed. Welding of the contactor contacts only is permitted if these can be separated easily without significant deformation. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 166 Types of coordination SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 167: References

    SIRIUS electronic overload relay S3 (3RB304 and 3RB314) 3ZX1012-0RB31-4AA1 SIRIUS electronic overload relay S6 / S10 / S12 (3RB20 and 3RB21) 3ZX1012-0RB20-1BA1 SIRIUS electronic overload relay 3RB22 and 3RB23 3ZX1012-0RB22-1AA1 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 168: Manuals - Sirius Modular System

    • • overload relay (http://support.automation.siemens.com/WW/view/en/46165627) manual (Article number: 3ZX1012-0RB24-0AC0) 3UG4 monitoring relays/ "3UG4/3RR2 Monitoring Relays" manual • • 3RR2 current monitoring (http://support.automation.siemens.com/WW/view/en/70210263) relays (Article number: 3ZX1012-0UG40-0AC0) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 169 "SIRIUS - SIRIUS 3RA2711 function modules for IO-Link" manual • (http://support.automation.siemens.com/WW/view/en/39319600) (Article number: 3ZX1012-0RA27-1AC1) 4SI SIRIUS electronic "4SI SIRIUS Electronic Module" • • module (http://support.automation.siemens.com/WW/view/en/37856470) (3RK1005-0LB00-0AA0)" manual (Article number: 3ZX1012-0LB00-0AA0) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 170: More Information

    (www.siemens.com/sirius/mall). ● Technical Assistance Siemens supports you with all technical product and system enquiries – both before and after delivery. You can access our Service & Support Portal on the Internet (www.siemens.com/sirius/technical-assistance). You can also submit your question directly to a technical consultant using our support request service.

  • Page 171: Dimension Drawings (Dimensions In Mm)

    Dimension drawings (dimensions in mm) CAx data You can find the CAx data in the Siemens Industry Online Support (https://support.industry.siemens.com/cs/ww/en/ps/16269/td). 1. Enter the full article number of the desired device in the "Product" field, and confirm with the Enter key.

  • Page 172: Dimension Drawings For 3Ru21 Thermal Overload Relays

    Dimension drawings for 3RU21 thermal overload relays 3RU2116-..B0 (S00, screw connection, contactor mounting) Figure C-1 3RU2116-..B0 3RU2116-4.B1 (S00, screw connection, mounting on stand-alone assembly support) Figure C-2 3RU2116-4.B1 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 173 C.2 Dimension drawings for 3RU21 thermal overload relays 3RU2116-..C0 (S00, spring-loaded connection, contactor mounting) Figure C-3 3RU2116-..C0 3RU2116-..C1 (S00, spring-loaded connection, mounting on stand-alone assembly support) Figure C-4 3RU2116-..C1 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 174 3RU2126-..B0 (S0, screw connection, contactor mounting) AC: 92; DC/UC: 102 AC: 34; DC/UC: 44 Figure C-5 3RU2126-..B0 3RU2126-4.B1 (S0, screw connection, mounting on stand-alone assembly support) Figure C-6 3RU2126-4.B1 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 175 3RU2126-..C0 (S0, spring-loaded connection, contactor mounting) AC: 93; DC/UC: 103 AC: 76; DC/UC: 86 Figure C-7 3RU2126-..C0 3RU2126-4.C1 (S0, spring-loaded connection, mounting on stand-alone assembly support) Figure C-8 3RU2126-4.C1 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 176 C.2 Dimension drawings for 3RU21 thermal overload relays 3RU2136-..B0 (S2, screw connection, contactor mounting) Figure C-9 3RU2136-..B0 3RU2136-..B1 (S2, screw connection, mounting on stand-alone assembly support) Figure C-10 3RU2136-..B1 and 3RU2936-3AA01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 177 C.2 Dimension drawings for 3RU21 thermal overload relays 3RU2136-..D0 (S2, spring-loaded connection, contactor mounting) Figure C-11 3RU2136-..D0 3RU2136-..D1 (S2, spring-loaded connection, mounting on stand-alone assembly support) Figure C-12 3RU2136-..D1 and 3RU2936-3AA01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 178 C.2 Dimension drawings for 3RU21 thermal overload relays 3RU2146-..B0 (S3, screw connection, contactor mounting) Figure C-13 3RU2146-..B0 3RU2146-..B1 (S3, screw connection, mounting on stand-alone assembly support) Figure C-14 3RU2146-..B1 and 3RU2946-3AA01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 179 C.2 Dimension drawings for 3RU21 thermal overload relays 3RU2146-..D0 (S3, spring-loaded connection, contactor mounting) Figure C-15 3RU2146-..D0 3RU2146-..D1 (S3, spring-loaded connection, mounting on stand-alone assembly support) Figure C-16 3RU2146-..D1 and 3RU2946-3AA01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 180: Dimension Drawings For 3Rb20 / 3Rb21 Electronic Overload Relay

    Dimension drawings for 3RB20 / 3RB21 electronic overload relay 3RB2.5 (S6, screw connection) Figure C-17 3RB2.5 3RB2.5.-..W. / 3RB2.5.-..X. (S6, screw connection, through-hole technology) Figure C-18 3RB2.5-..W 3RB2.5-..X SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 181 Dimension drawings (dimensions in mm) C.3 Dimension drawings for 3RB20 / 3RB21 electronic overload relay 3RB2.6 (S10 / S12, screw connection) Figure C-19 3RB2.6 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 182: Dimension Drawings For 3Rb30/3Rb31 Electronic Overload Relays

    Dimension drawings for 3RB30/3RB31 electronic overload relays 3RB3.1.-..B0 (S00, screw connection, contactor mounting) Figure C-20 3RB3.1.-..B0 3RB3.1.-..B0 (S00, screw connection, mounting on stand-alone assembly support) Figure C-21 3RB3.1.-..B0 and 3RU2916-3AA01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 183 C.4 Dimension drawings for 3RB30/3RB31 electronic overload relays 3RB3.1.-..E0 (S00, spring-loaded connection, contactor mounting) Figure C-22 3RB3.1.-..E0 3RB3.1.-..E0 (S00, spring-loaded connection, mounting on stand-alone assembly support) Figure C-23 3RB3.1.-..E0 and 3RU2916-3AC01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 184 3RB3.2.-..B0 (S0, screw connection, contactor mounting) AC: 87; DC/UC: 97 Figure C-24 3RB3.2.-..B0 3RB3.2.-..B0 (S0, screw connection, mounting on stand-alone assembly support) Figure C-25 3RB3.2.-..B0 and 3RU2926-3AA01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 185 3RB3.2.-..E0 (S0, spring-loaded connection, contactor mounting) AC: 93; DC/UC: 103 AC: 88; DC/UC: 98 Figure C-26 3RB3.2.-..E0 3RB3.2.-..E0 (S0, spring-loaded connection, mounting on stand-alone assembly support) Figure C-27 3RB3.2.-..E0 and 3RU2926-3AC01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 186 C.4 Dimension drawings for 3RB30/3RB31 electronic overload relays 3RB3.3.-..B0 (S2, screw connection, contactor mounting) Figure C-28 3RB3.3.-..B0 3RB3.3.-..B0 (S2, screw connection, mounting on stand-alone assembly support) Figure C-29 3RB3.3.-..B0 and 3RU2936-3AA01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 187 C.4 Dimension drawings for 3RB30/3RB31 electronic overload relays 3RB3.3.-..D0 (S2, spring-loaded connection, contactor mounting) Figure C-30 3RB3.3.-..D0 3RB3.3.-..D0 (S2, spring-loaded connection, mounting on stand-alone assembly support) Figure C-31 3RB3.3.-..D0 and 3RU2936-3AA01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 188 Dimension drawings (dimensions in mm) C.4 Dimension drawings for 3RB30/3RB31 electronic overload relays 3RB3.3.-..W. (S2, screw connection, through-hole technology) Figure C-32 3RB3.3.-..W. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 189 Dimension drawings (dimensions in mm) C.4 Dimension drawings for 3RB30/3RB31 electronic overload relays 3RB3.3.-..X. (S2, spring-loaded connection, through-hole technology) Figure C-33 3RB3.3.-..X. SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 190 C.4 Dimension drawings for 3RB30/3RB31 electronic overload relays 3RB3.4.-..B0 (S3, screw connection, contactor mounting) Figure C-34 3RB3.4.-..B0 3RB3.4.-..B0 (S3, screw connection, mounting on stand-alone assembly support) Figure C-35 3RB3.4.-..B0 and 3RU2946-3AA01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 191 C.4 Dimension drawings for 3RB30/3RB31 electronic overload relays 3RB3.4.-..D0 (S3, spring-loaded connection, contactor mounting) Figure C-36 3RB3.4.-..D0 3RB3.4.-..D0 (S3, spring-loaded connection, mounting on stand-alone assembly support) Figure C-37 3RB3.4.-..D0 and 3RU2946-3AA01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 192 Dimension drawings (dimensions in mm) C.4 Dimension drawings for 3RB30/3RB31 electronic overload relays 3RB3.4.-..W. (S3, screw connection, through-hole technology) Figure C-38 3RB3.4.-..W. Figure C-39 3RB3.4.-..W. - drilling diagram SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 193 Dimension drawings (dimensions in mm) C.4 Dimension drawings for 3RB30/3RB31 electronic overload relays 3RB3.4.-..X. (S3, spring-loaded connection, through-hole technology) Figure C-40 3RB3.4.-..X. Figure C-41 3RB3.4.-..X. - drilling diagram SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 194: Drilling Diagram For 3Rt Contactors

    Figure C-42 Drilling plan for contactors with screw-type connections and ring cable lug connections (size S00) Drilling plan for 3RT2.1.-2 contactors Figure C-43 Drilling plan for contactors with spring-loaded connections (size S00) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 195 Drilling plan for 3RT2.2. contactors Figure C-44 Drilling plan for 3RT2.2. contactors (size S0) Drilling plan for 3RT2.3. contactors Figure C-45 Drilling plan for 3RT2.3. contactors (size S2) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 196 Drilling diagram for 3RT2.4. contactors Figure C-46 Drilling diagram for 3RT2.4. contactors (size S3) Drilling diagram for 3RT1.5. contactors Figure C-47 Drilling diagram for 3RT1.5. contactors (size S6) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 197 Drilling diagram for 3RT1.6. contactors Figure C-48 Drilling diagram for 3RT1.6. contactors (size S10) Drilling diagram for 3RT1.7. contactors Figure C-49 Drilling diagram for 3RT1.7. contactors (size S12) SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 198: Dimension Drawings And Drilling Plan For 3Ru29.6 Stand-Alone Assembly Supports

    C.6 Dimension drawings and drilling plan for 3RU29.6 stand-alone assembly supports Dimension drawings and drilling plan for 3RU29.6 stand-alone assembly supports 3RU2916-3AA01 (S00, screw connection) Figure C-50 3RU2916-3AA01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 199 Dimension drawings (dimensions in mm) C.6 Dimension drawings and drilling plan for 3RU29.6 stand-alone assembly supports 3RU2916-3AC01 (S00, spring-loaded connection) Figure C-51 3RU2916-3AC01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 200 Dimension drawings (dimensions in mm) C.6 Dimension drawings and drilling plan for 3RU29.6 stand-alone assembly supports 3RU2926-3AA01 (S0, screw connection) Figure C-52 3RU2926-3AA01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 201 Dimension drawings (dimensions in mm) C.6 Dimension drawings and drilling plan for 3RU29.6 stand-alone assembly supports 3RU2926-3AC01 (S0, spring-loaded connection) Figure C-53 3RU2926-3AC01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 202 Dimension drawings (dimensions in mm) C.6 Dimension drawings and drilling plan for 3RU29.6 stand-alone assembly supports 3RU2936-3AA01 (S2, screw connection) Figure C-54 3RU2936-3AA01 3RU2946-3AA01 (S3, screw connection) Figure C-55 3RU2946-3AA01 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

  • Page 203: Index

    Overload relay, 143, 144 3RB3143 electronic overload relay, 45 3RU2116 thermal overload relay, 23 3RU2126 thermal overload relay, 24 3RU2136 thermal overload relay, 25 3RU2146 thermal overload relay, 26 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 204 Overload relay, 50, 62 Technical Assistance, 14 Terminal cover for cable lug connection and busbar Operating instructions, 167 connection Overload Overload relay, 140, 141 Overload relay, 50, 56 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 205 Overload relay, 101 Trip classes Overload relay, 50 Tripping characteristics Overload relay, 52, 53 Types of coordination, 165 Overload relay, 61, 65 Wiring examples Overload relay, 162 SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...
  • Page 206 Index SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays Manual, 09/2016, A5E03656507420A/RS-AB/003...

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