Hi all,
First time poster. We recently had a tree branch cause a 3 phase fault on an overhead tap line aprroximately 2000’ away from our substation. The fault caused 1 of 2 MAIN CIRCUIT BREAKERS to open at the substation. It should have opened the feeder on the tap only. I haven’t got the event report from the relay, but my feeling is either the SEL651 on the feeder is set incorrectly or the SEL351 is set incorrectly at the MAIN BREAKER. Thx.
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