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  1. ndondo

    instantaneous trip

    it cant be the arc that trips the breaker, if you do have an arc protection relay on your breaker then you need to check the status of your arc prot relay and also check your settings on your o/c and e/f protection relay there is a possibility that your setting are too low on the relay.
  2. ndondo

    Breaker Failure Initiate

    from my understanding of breaker fail and how it works it is there to protect the feeder in the event of a fault that occurs to that specific feeder and a protection relay does trip but the breaker fails to trip and the relay sends the signal to the incomer then the incomer should trip to...
  3. ndondo

    English Electric/GEC Measurements CT Test Blocks

    If you dont find it at T&D try ABB.
  4. ndondo

    switcgear

    what is the difference between buz zone and bus bar protection in the switchgear and how does one go about testing the two in the switchboard.

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