7SR21 & 7SR22 Argus Installation Guide
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 Chapter 5 Page 1 of 22
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 First Release
2008/07 2434H80011R3d-2 Demand records. Optional DNP3.0 data comms.
2009/09 2435H80004/5 R4b-4 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.
To Next Page
