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  1. mosesnbklyn

    substation HV Disconnect Failures

    thread238-410869 Had an engineering manager tell me they are concerned vertical end break switches (VEB) may fail by closing after being opened to isolate equipment for work. I would agree that double-end break (DEB) are generally more reliable/robust. I have seen switches that failed due to...
  2. mosesnbklyn

    Vertically Mounted PT's in ME switchgear?

    Anyone seen this before? I can't find a code reference but I can't confirm the OEM approves either. They are cast coil GE PTG5 2-fuse type. Matt M. Nissen,P.E. Senior Electrical Engineer Waldron Engineering & Construction
  3. mosesnbklyn

    grounding grid in cellar below water table

    we have a cogen plant, GSU, and MV switchgear/GCB in the cellar of a new commercial/institutional building. we dont have the soil resistivity yet, but the equipment elevation is below the water table. how does this affect the ground grid design?

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