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  1. Mikey44

    Emerg Gen & XFMR to share the HRG. Any Issues?

    I considered using the 4th pole of the ATS to do the disconnecting of the neutrals for maintenance however when drawing it out there are conditions where the pole will not isolate the neutrals (See attached Sketches). One example is the generator running with maintenance on the transformer, the...
  2. Mikey44

    Emerg Gen & XFMR to share the HRG. Any Issues?

    Thanks for the reply Bill. I do not have any 277V (line to neutral loads). You mention only one ground system may be connected at any time. I do have an open transition ATS however the emergency panel will be fed from the generator at times while the rest of the system will be from the...
  3. Mikey44

    Emerg Gen & XFMR to share the HRG. Any Issues?

    I plan to install a 750KVA 2400V-480 Delta-Wye XFMR with a high resistance ground. There will also be a 200KW emergency generator that feeds the emergency panel through an ATS on loss of the 750KVA XFMR power. I have limited space to add an additional HRG and would like to use a single HRG...

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