3 Phase fault

Discussion in 'Homework Help' started by Cerkit, Apr 5, 2012.

  1. Cerkit

    Thread Starter Senior Member

    Jan 4, 2009
    Hi. What happens if there is a short between two phases at some point on a power line, how does this affect the load and the suppliers and what are the immediate response ie does it shut down?

    Many thanks
  2. strantor

    AAC Fanatic!

    Oct 3, 2010
    I'd imagine a direct short on the power lines would blow the lines right in half and then everbody would be without power. But I'm not a lineman or an electrician
  3. amilton542

    Active Member

    Nov 13, 2010
    A protective relay will trip a circuit breaker faster than I can say, "short-circuit."

    Lets say a 'squirrel' shorts out two phases, then a multi-shot circuit breaker will allow a degree of fault-current to flow and will then attempt to reclose and will remain locked-out on the third attempt.
    strantor likes this.