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  • Users: pyro214
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  1. pyro214

    Isolation Transformer vs. 3-Phase Breaker

    I recently found a breaker on a three-phase system where if one phase trips, the other two phases won't trip. I was told by someone, "There is an isolation transformer connected to the circuit breaker which eliminates the risk of one phase being live if any of the phases trip" Does this make...
  2. pyro214

    Fuse/ Breaker Sizing

    To exaggerate the scenario I'm thinking about: if we have a 10A load that is connected using a 1000A rated cable and 500A rated fuse/ circuit breaker (F/CB), if the 10A load short circuits and draws 200A: [ol 1] The F/CB will not open The cable will not catch on fire We 'hope' that the load has...

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