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Weird questions about short circuit current capacity

  1. Feb 19, 2016 #1
    Hi friends ,

    today we are just general talking with my boss. and he asked me a question . and that is,

    if we have equipment that is rated short circuit current is 40kA. for 1 sec. and if we must have to use that same equipment for 3 sec time. that how much short circuit current they can sustain for 03 sec time, definitely below than 40kA. but how much with respect to time ie 3 sec. let say 10kA , 20kA , 30kA, or 39.8kA. ..

    this is completely just discussion not practically by any mean please.

    thanks
     
  2. jcsd
  3. Feb 19, 2016 #2

    phinds

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    Completely indeterminate given the information you have provided. It's going to depend on the specifics of the particular equipment.
     
  4. Feb 19, 2016 #3

    jim hardy

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  5. Feb 20, 2016 #4
    For something that burns, heat is developed by I2R. Lots of equipment will fail in this mode, but it's not the only failure mode.
     
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