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  • Users: sparky1944
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  1. sparky1944

    Toshiba VCB

    I am looking at a Toshiba VCB that was used as a contactor for a 4160-V motor. There was an arcing fault at the contactor. Does anyone have experience with this type of failure? Especially with a Toshiba VCB? Thanks
  2. sparky1944

    Harmonic current through a Delta-Wye

    I am looking at a problem with a cable run on the primary side of a 480 delta - 208/120 transformer. The transformer feeds loads with relatively high harmonic current. The equipment ground wire on the primary side has severed from what looks like overcurrent but it is within NEC specs (#2 AWG...

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