7SR11 & 7SR12 Description Of Operation
Chapter 1 Page 2 of 88 ©2017 Siemens Protection Devices Limited
Software Revision History
2017/04 7SR11 2436H80003 R4g-3c
7SR12 2436H80004 R4g-3c
PTRC Trip time upgrade.
RFLT Logical node change to add fault currents.
Operating system upgrade.
2015/08 7SR11 2436H80003 R4b-3b
7SR12 2436H80004 R4b-3b
Addition of 50AFD Arc Detection and
32, 32S and 55 Power Protection elements.
ACB Phase Rotation added.
2015/06 7SR11 2436H80003 R3b-3a
7SR12 2436H80004 R3b-3a
Minor changes to IEC 61850 implementation prior to release
of E6 models.
2014/10 7SR11 2436H80003 R3a-3a
7SR12 2436H80004 R3a-3a
Addition of optional IEC 61850 communication protocol.
IDMTL Time multiplier resolution increased.
UV Guard added to 47NPS
27/59 elements phase segregated output added.
2013/09 7SR11 2436H80003 R2c-2b
7SR12 2436H80004 R2c-2b
Further improvement to startup routines.
2013/01 7SR11 2436H80003 R2b-2b
7SR12 2436H80004 R2b-2b
Frequency(Hz) added to Fault Record & minor Fault Record
corrections.
Default Control password added.
Improvement to startup routines to prevent loss of data
2012/01 7SR11 2436H80003 R2a-2a
7SR12 2436H80004 R2a-2a
Power-on counter added.
Data Comms improvements
2011/06 7SR11 2436H80003 R2-2
7SR12 2436H80004 R2-2
First Maintenance,
IEC reset curves added
37G Undercurrent added, UV Guard added to 37 elements.
Line Check added to non-AR variants.
Minor changes to suit customer requests.
2009/04 2436H80003R1g-1c 7SR11
2436H80004R1g-1c 7SR12
First Release
Hardware Revision History
2015/08 FF Segregated Outputs variant introduced
NXP4337 microprocessor support added
2015/06 EE E6 hardware variants with IEC 61850 functionality introduced.
No changes to non-IEC61850 E4 hardware.
Circuit changes to improve startup
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