LSIG vs LS trip unit for 1200a MCB in PLC

kjrise

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Join Date
Jul 2014
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ga
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Do I need to have a breaker with LSIG as my main inside a PLC.
It's a 1200amp breaker, can i use just use a LS trip unit in that breaker?
 
One other item the PLC is being fed from a switchboard in the same room that has a 1200amp CB w/ LSIG feeding it.
 

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