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  1. tsgelectric

    Soft Start Overcurrent Protection

    Is anybody familiar with fusing Soft Start controllers? I ususally fuse my motors at 125-150% of the motor's nameplate FLA. Due to the high cost of semiconductor fuses, most people fuse soft starts with regular fuses. What are the best semiconductor fuses to use with soft starts and how...
  2. tsgelectric

    Transformer Primary OC Protection Only. Delta to Wye.

    I need to hook up a machine at 208-240V 3ph using a transformer to step-down the voltage from 480V. There is not a convienient place for me to add Secondary overcurrent protection so I wish to use the primary OC protection only. The NEC code specifies that secondary overcurrent protection is...

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