Relay Settings
Relay Settings
(OP)
I've come across a Westinghouse CO-8 relay for a 13.8kV feeder. A testing company has covered up the nameplate of the relay with their test data, but I'm unsure what it means. The paper reads:
120A P.U.
360A -48~
660A -INST
This is fed by a 100:5 CT, so the pickup and the instantaneous makes sense with the settings available to this relay. What does the 360A number correspond to? Is there a way to read the time dial from this information?
Thank you
120A P.U.
360A -48~
660A -INST
This is fed by a 100:5 CT, so the pickup and the instantaneous makes sense with the settings available to this relay. What does the 360A number correspond to? Is there a way to read the time dial from this information?
Thank you






RE: Relay Settings
Is the Time Dial visible through the front face of the relay? It usually is. That would be another way to confirm the TD setting.
RE: Relay Settings
RE: Relay Settings
This test sheet is covering the face of the relay so I can't verify.
Thank you for your comments.