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Recent content by Amro Protec

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    SIPROTEC 7SJ85

    I have a damaged SIEMENS Siprotec 7SJ85 relay its Product code is: 7SJ85-DAAA-AA0-0AAAA0-AM0111-12111B-BAA000-000AC0-CB1BA1-CB1CG0-CG0CL0 and I have another spare 7SJ85 relay Product code is: 7SJ85-DAAA-AA0-0AAAA0-AA0111-12111B-BAA000-000AC0-CB1BA1-EB0 My question is can i swap the damaged one...
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    Factors affecting Cables insulation resistance testing

    I wonder what could cause low insulation resistance test when cable is connected to the circuit breaker but the circuit breaker is opened and no voltage transformers are connected to the line. My question does capacitive voltage indicator could cause lower value of cable insulation test and how...
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    33KV Siemens GIS Closing coil and relay binary output

    I have a 33KV switchgear when you earth the feeder and close the breaker there is a mechanical interlock with padlock that when locked it blocks the opening of circuit breaker. i had one of the feeders that its binary output contact which open the breaker has stopped working. i figured out that...
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