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Siemens Argus 7SR21 Installation Manual

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7SR21 Non-Directional
7SR22 Directional
Overcurrent Relay

Document Release History

This document is issue 2010/05 The list of revisions up to and including this issue is:
2010/05
Additional Comms modules option of (RS485 + IRIG-B) and (RS232 + IRIG-B) and typographical
revisions
2008/03
First issue
2008/06
R1a Typographical revisions
2008/07
Second Issue. Software revision 2434H80011R3d-2
2009/09
Third Issue. Software revision 2435H80004/5 R4b-4

Software Revision History

2008/03
2435H800004/5R2c-2b
2008/07
2434H80011R3d-2
2009/09
2435H80004/5 R4b-4
The copyright and other intellectual property rights in this document, and in any model or article produced from it
(and including any registered or unregistered design rights) are the property of Siemens Protection Devices
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.
While the information and guidance given in this document is believed to be correct, no liability shall be accepted
for any loss or damage caused by any error or omission, whether such error or omission is the result of
negligence or any other cause. Any and all such liability is disclaimed.
©2010 Siemens Protection Devices Limited
First Release
Demand records. Optional DNP3.0 data comms.
CTS-I Supervision. Undercurrent 37G & 37SEF. Vx U/O Voltage.
46BC U/C. Comms Settings. Waveform Storage Settings. Fault
Storage Settings. Energy Storage. Trip test function. Local/Remote
modes. Settings ranges extended. Protocol changes.
7SR21 & 7SR22 Argus Installation Guide
Chapter 5 Page 1 of 22

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  Summary of Contents for Siemens Argus 7SR21

  • Page 1: Document Release History

    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 2: Table Of Contents

    7.4 Typical Connection: 7SR22 Directional OC/EF and NVD ............20 7.5 Typical Connection: 7SR22 Directional OC and EF ...............21 7.6 Typical Connection: 7SR22 Connected to VTs and Capacitor Cone Unit......22 ©2010 Siemens Protection Devices Limited Chapter 5 Page 2 of 22...
  • Page 3: List Of Figures

    Figure 7.4-1 7SR22 Applied to Feeder ....................20 Figure 7.5-1 7SR22 Applied to Feeder - No Zero Sequence Voltage Source ........21 Figure 7.6-1 7SR22 Applied to Feeder with Capacitor Cones Fitted .............22 ©2010 Siemens Protection Devices Limited Chapter 5 Page 3 of 22...
  • Page 4: Section 1: Installation

    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 5: Section 2: Equipment Operating Conditions

    Front Cover The front cover provides additional securing of the relay element within the case. The relay cover should be in place during normal operating conditions. ©2010 Siemens Protection Devices Limited Chapter 5 Page 5 of 22...
  • Page 6: Section 3: Dimensions And Panel Fixings

    Figure 3.1-1 Overall Dimensions (mm) and panel Drilling for Size E6 Epsilon case (Typically 4.2 kg) Figure 3.1-2 Overall Dimensions (mm) and Panel Drilling for Size E8 Epsilon Case (Typically 5.3 kg) ©2010 Siemens Protection Devices Limited Chapter 5 Page 6 of 22...
  • Page 7: Fixings

    Typical rear terminal block fixing kit (1kit per terminal block fitted to relay) Consists of: 28 x M4, 8mm Screws 28 x M4 Lock Washer 3.2.3 Fibre Optic Connectors The relay has Fibre-Optic ST (BFOC/2.5) bayonet connectors fitted when specified. ©2010 Siemens Protection Devices Limited Chapter 5 Page 7 of 22...
  • Page 8: Section 4: Rear Terminal Drawings

    2) RS485 (block ”B” terms 14, 16, 18, 20) connections to this communication facility is by screened, twisted pair cable. On site when wiring other facilities ensure that these terminals are not obscured by other wiring runs. Cable should be RS485 compliant. ©2010 Siemens Protection Devices Limited Chapter 5 Page 8 of 22...
  • Page 9: Figure 4.1-3 E6 Standard + Additional Comms (Irig B + Rs485) (See Note 2)

    7SR21 & 7SR22 Argus Installation Guide Figure 4.1-3 E6 Standard + Additional Comms (IRIG B + RS485) (See Note 2) Figure 4.1-4 E6 Standard + Additional Comms (IRIG B + RS232) ©2010 Siemens Protection Devices Limited Chapter 5 Page 9 of 22...
  • Page 10: E8 Case

    2) RS485 (block ”B” terms 14, 16, 18, 20) connections to this communication facility is by screened, twisted pair cable. On site when wiring other facilities ensure that these terminals are not obscured by other wiring runs. Cable should be RS485 compliant. ©2010 Siemens Protection Devices Limited Chapter 5 Page 10 of 22...
  • Page 11: E8 Case

    2) RS485 (block ”B” terms 14, 16, 18, 20) connections to this communication facility is by screened, twisted pair cable. On site when wiring other facilities ensure that these terminals are not obscured by other wiring runs. Cable should be RS485 compliant. ©2010 Siemens Protection Devices Limited Chapter 5 Page 11 of 22...
  • Page 12: Section 5: Connection/Wiring/Diagrams

    7SR21 & 7SR22 Argus Installation Guide Section 5: Connection/Wiring/Diagrams Wiring Diagram: 7SR21 OC/EF Relay Figure 5.1-1 Connection Diagram for 7SR21 Relay ©2010 Siemens Protection Devices Limited Chapter 5 Page 12 of 22...
  • Page 13: Wiring Diagram: 7Sr22 Directional Oc/Ef Relay

    BO 1 GND. BO 2 BI 1 BO 3 BI 2 BO 4 BI 3 BO 5 Screen BO 6 Term. Figure 5.2-1 Connection Diagram for 7SR22 Relay ©2010 Siemens Protection Devices Limited Chapter 5 Page 13 of 22...
  • Page 14: Section 6: Data Comms Connections

    IRIG-B time synchronisation signals. Ensure that the stub length is minimised by connecting the tee- connector directly to the rear of the relay. A suitable co-axial cable would be type RG 58 50ohms. ©2010 Siemens Protection Devices Limited Chapter 5 Page 14 of 22...
  • Page 15: Additional (Optional) Fibre Optic Connections

    Figure 6.3-2 Data Comms to Multiple Devices Using 7SG24 and F.O. Ring Network The F.O. data communications link with a particular relay will be broken if the relay element is withdrawn from the case, all other relays will still communicate. ©2010 Siemens Protection Devices Limited Chapter 5 Page 15 of 22...
  • Page 16: Additional (Optional) Rs485 Connections

    Signal Ground (GND) Input Supply +5 V Linked to 8 (volts free) Linked to 7 (volts free) Output Supply +5 V 50mA Figure 6.5-1 RS232 Data Comms Pin Connections ©2010 Siemens Protection Devices Limited Chapter 5 Page 16 of 22...
  • Page 17: Section 7: Connection Diagrams

    7SR21 & 7SR22 Argus Installation Guide Section 7: Connection Diagrams Typical Connection: 7SR22 Directional OC/EF and REF Figure 7.1-1 7SR22 Applied to Transformer Incomer ©2010 Siemens Protection Devices Limited Chapter 5 Page 17 of 22...
  • Page 18: Typical Connection: 7Sr22 Directional Oc/Ef And Nvd

    7SR21 & 7SR22 Argus Installation Guide Typical Connection: 7SR22 Directional OC/EF and NVD Figure 7.2-1 7SR22 Applied to Transformer Incomer Including HV NVD Protection ©2010 Siemens Protection Devices Limited Chapter 5 Page 18 of 22...
  • Page 19: Typical Connection: 7Sr22 Directional Oc/Ef And Nvd

    2) CT and Earth connections are typical only. 3) Application shows use of V as an NVD input. 4) Star Connected VT: Phase Voltage Config:-V Figure 7.3-1 7SR22 Applied to Feeder Including NVD Protection ©2010 Siemens Protection Devices Limited Chapter 5 Page 19 of 22...
  • Page 20: Typical Connection: 7Sr22 Directional Oc/Ef And Nvd

    1) CT circuits are shown connected to 1A tap – use alternative tap for 5A rated CTs. 2) CT and Earth connections are typical only. 3) Voltage Config:-V , 3V Figure 7.4-1 7SR22 Applied to Feeder ©2010 Siemens Protection Devices Limited Chapter 5 Page 20 of 22...
  • Page 21: Typical Connection: 7Sr22 Directional Oc And Ef

    3) Vee Connected VT: Phase Voltage Config:-VA,VB,VC 4) DEF elements must be NPS polarised (Vo polarising not applicable) Figure 7.5-1 7SR22 Applied to Feeder - No Zero Sequence Voltage Source ©2010 Siemens Protection Devices Limited Chapter 5 Page 21 of 22...
  • Page 22: Typical Connection: 7Sr22 Connected To Vts And Capacitor Cone Unit

    3) Vee Connected VT: Phase Voltage Config:-Va,Vb,Vc 4) DEF elements must be NPS polarised (Vo polarising not applicable) 5) V used for NVD input Figure 7.6-1 7SR22 Applied to Feeder with Capacitor Cones Fitted ©2010 Siemens Protection Devices Limited Chapter 5 Page 22 of 22...

This manual is also suitable for:

Argus 7sr227sr2107sr220