Valence Electrical Training Services

SBF-1 Westinghouse Breaker Failure Relay Failure Question


To all,
We had a SBF-1 Breaker Failure Relay fail on us yesterday.  The time delay was not working properly.  We have many of these relays on our system and wanted to see if there has been a Relay Advisory, or PAL letter on this relay.  Would also like to hear if any other utility has had problems with this relay.  The relay was tested in January of this year and there was not a problem discovered with the time delay at that time.  If you would let me know at your earliest that would be appreciated.  I will put together a summary of the response and submit them back to the group.  Thanks for your time and effort.

Model SBF-1
Manufacturer Westinghouse
Part # 1529F93A05C


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