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Answer Posted / neeraj vishwakarma
Basically master trip relay is called master coz it has the
least operating time ie;it trips first .also it works to
multiply no. of contacts..for eg.if Spam 150 C relay gives
trip contact to master trip relay ..the MTR trips with
changeover of contacts..you can use those contacts for
tripping breaker ,getting indications on DCS etc.
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