Answer / avdhesh

Antipumping Relay : It is generaly used in series of
closing coil of breaker. The function is to cut off the
supply of closing coil immediately after closing of
breaker. This is required as coil is not designed for
continous rating.
Lockout relay : This is also used in closing ckt of
breaker. This is basicaly latched relay which inihibit the
closing of breaker for defined time if relay is operated.
Lockout relay can be self reset or manual reset (choice)
after definite time.

My requirement is 1VA,50/5A Current Transformer for Metering .If I select 15VA , 50/5A CT.Is there any possibility of Technical Problem ?

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i am iti student i have project to do. that IS 100MW 220\33KV SUBSTATION I WANT TO KNOW HOW TO START, LIKE CALCULATION, WHAT RATING OF CT,CVT, PT, ISOLATOR LIGHTING ARRESTER WAVE TRAP CIRCUIT BREAKER IN 22OKV SIDE, ALSO TO WARDS 33KV SIDE PLS HELP ME WITH THIS, THIS MY LIFE NOW, I KNOW AUTOCAD, I LIKE TO KNOW HOW TO CALCULATE ALL THE THINGS

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