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what happens after the 51 element trips?

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    what happens after the 51 element trips?

    Given a circuit breaker schematic what happens after the 51 element trips?

    A) Trip coil energizes and opens the breaker
    B) 86-1 contacts close
    C) 86-1 and 86-2 relay operates
    D) 86-1 relay operates
    E) 86-2 relay operates

    its hard to read this diagram can anyone help?

    Click image for larger version. 

Name:	main-breaker-a-schematic.jpg 
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  3. Warrengarber's Avatar
    Warrengarber is offline
    If you ignore it, it will fail.
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    It is really hard to see but the two 50/51 elements in the SR relay operate and next will operate the 86-1 and the 86-2 lock out relays. The two lock out relays will then energize the trip coil (TC). So I think the answer should be C.




    Quote Originally Posted by mbaxter1 View Post
    Given a circuit breaker schematic what happens after the 51 element trips?

    A) Trip coil energizes and opens the breaker
    B) 86-1 contacts close
    C) 86-1 and 86-2 relay operates
    D) 86-1 relay operates
    E) 86-2 relay operates

    its hard to read this diagram can anyone help?

    Click image for larger version. 

Name:	main-breaker-a-schematic.jpg 
Views:	31 
Size:	68.6 KB 
ID:	418
    Warren Garber
    Have a great day!

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