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. ?????
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...
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...
