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Recent content by serb

  1. serb

    breaker trip on ground fault

    Unfortunatelly I don't have a drawing of SST.
  2. serb

    breaker trip on ground fault

    Elevator motor is fed through the controller, isolation transformer and disconnect switch in the elevator room. It's DC motor. Power source is in the load center and protection is done with 800A GE power circuit breaker equipped with SST trip unit. SST has rating 300A and is tapped at 225A for...
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