HOW TO IDENTIFY THE RELAYS WHICH APPLICATION IN WHICH RELAY
USING?



HOW TO IDENTIFY THE RELAYS WHICH APPLICATION IN WHICH RELAY USING?..

Answer / guest

by its elctrical device number(ANSI number).
ex. 1) 21 - distance protn.
2) 87B - busbar differential protn.
3) 87T - trafo. differential protn.
4) 64N - ref

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