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  • Users: dtour
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  1. dtour

    MV Breaker 86BF Trip

    I was hoping to get some in input on potential root causes for the activation of an 86 lock-out relay specifically used for a breaker failure feature (referred to as 86BF on the attached drawings). We took down a large portion of our facility due to the activation of this 86BF that I found to be...

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