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Recent content by fieldy

  1. fieldy

    Neutral Bonding Issue with ATS, Generator, and UPS

    In response: I've been told that the UPS has a wraparound maintenance bypass external to the UPS. When the system is in bypass, there is no transformer in the circuit. Further review has lead the UPS manufacturer to state that the neutral to ground bond can be removed at the UPS as there is...
  2. fieldy

    Neutral Bonding Issue with ATS, Generator, and UPS

    I was listening to a conversation recently regarding the following situation (as I understand it). Location - USA Incoming 13.2kV:480/277Y Utility Feed to Normal side of an ATS, Emergency side of ATS is fed from a 480/277Y diesel powered genset. ATS feeds a breaker, followed by a UPS. The...
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