Description Of Operation - Siemens 7SR45 Argus User Manual

7SR45

Description of Operation

Document Release History
This document is issue 2018/06. The list of revisions up to and including this issue is:
2018/06 Seventh Issue
2018/04 Sixth Issue
2017/08
Fifth Issue
2017/01 Fourth Issue
2016/10 Third Issue
2016/09 Second Issue
2015/08
First Issue
Software Revision History
2018/06 2438H80001R2b-1b
2018/04 2438H80001R2a-1a
2017/08 2438H80001R1e-1a
2017/01 2438H80001R1d-1a
2016/10 2438H80001R1c-1a
2016/09 2438H80001R1b-1a
2015/08 2438H80001R1a-1a
Hardware Revision History
2018/06 7SR450/FF
2018/04 7SR450/EE
2017/02 7SR450/DD
2016/09 7SR450/CC
2015/08 7SR450/BB
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(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.
©2018 Siemens Protection Devices Limited
Third Release
Second Release
Software maintenance to suit customer requirements
• Protection function 50, 50N, 50G setting range change to 0.2xIn to 20xIn
in step of 0.1xIn.
• Protection function 50, 50N, 50G reset ratio changed to 91% for setting
below 1xIn and 95% for setting above 1xIn.
Software maintenance to suit customer requirements
• Faster response times on 1 phase (t+100ms max) in 0.2 to 0.3 ranges.
• IRF functionality.
First Release
Third Release
(with reduced front cover and housing height)
Second Release
(with Aux. Power supply, remote flag and local flag, RS 485, additional
AC/DC BIs and BOs)
Hardware maintenance
Circuit changes to improve signal conditioning
First Release
Chapter 1 - 7SR45 Description of Operation