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  1. JVShermco

    Star Delta starter on 550 hp motor - 480 volt

    We have a star delta or Wye Delta starter on a 550 hp air compressor motor. We are tripping the 800 amp feeder breaker feeding the starter. It does not trip on every start. We have done inrush measurements (se attached pdf). The motor gets up to speed during the reduced voltage portion of...

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