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Isolating Line protection

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    Isolating Line protection

    What sequence do you all use when isolating line protection. I isolate trips, pull comm, inputs, pots and then current. I know of a couple guys that go in a different order. Opinions?

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    Quote Originally Posted by Js20981 View Post
    What sequence do you all use when isolating line protection. I isolate trips, pull comm, inputs, pots and then current. I know of a couple guys that go in a different order. Opinions?
    Doing this today actually. We follow pretty much the same. We usually do comms first. Trip's for breakers in question next, then BUS trips, Breaker Failure etc. I think we do current and then voltage. Senior tech was explaining in older electro-mech relays a loss of voltage while still having current could send a trip. Its funny how older protection systems still have input on todays habits. Also, always check the prints

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