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Recent content by AAKEM

  1. AAKEM

    desain tripping circuit main protection relays

    thanks for comments... What are concerns if we design trip circuit from main protection to 2 tripping coils? 1. MCB DC supply must enough to supply 6 tripping coil. Using 2 MCBs DC supply to separate supply to TC 1 and TC2 is better. 2. ?????
  2. AAKEM

    desain tripping circuit main protection relays

    In Extra High Voltage substation (AIS and GIS) and High Voltage substation (GIS), we already implemented 2 DC supply systems for main A and main B protection relays. The problem is we have 150 High voltage S/S with each bay supplied only by 1 DC supply system. Need extra high cost and much...
  3. AAKEM

    desain tripping circuit main protection relays

    What are the advantages and disadvantage using 2 tripping circuits from main protection relays (distance relays, differential relays, etc)to circuit breaker with 2 tripping coils in substation with only 1 DC supply system? In my company, I find design of tripping circuit main protection relay...
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