7SR242 Duobias Commissioning & Maintenance Guide
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©2010 Siemens Protection Devices Limited
7SR242 Duobias
Multi-Function 2-Winding Transformer Protection Relay
Document Release History
This document is issue 2010/02. The list of revisions up to and including this issue is:
2010/06 Defect Report Form revised
2010/02 Document reformat due to rebrand
2010/02 Third issue. Software revision 2662H80001 R4c-3
2008/07 Second issue. Software revision 2662H80001R3d-2c.
2008/05 First issue
Software Revision History
2010/02 2662H80001 R4c-3 Revisions to: VT ratio settings, 87BD 1
st
bias slope limit setting
increments, CB fail function, LED CONFIG menu, DATA STORAGE
menu.
Added: Open circuit detection (46BC), CONTROL MODE menu,
Close circuit supervision (74CCS), Measured earth fault undercurrent
(37G), Pulsed output contacts.
2008/07 2662H80001R3d-2c. Demand metering. Optional DNP3.0 data comms.
2008/05 2662H80001R3-2b First Release
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