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  • Users: OdessaEE
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  1. OdessaEE

    Neutral Grounding Resistors and Wye Wye Transformers

    I think I already know the answer to this, but I will ask anyway. A substation with a 10MVA 138KV/4160V Delta Wye transformer feeds our facility. The power company is planning to install a neutral grounding resistor during our next shutdown. Here is where my question comes in. The...
  2. OdessaEE

    Transformer Inrush

    I have never run into this scenario before so I thought I would double check: I have a 2400V service that feeds a Delta Delta 2000KVA 2400V/12470V step up transformer that is connected in series directly to a Delta Wye 1500KVA 12470/4160V transformer (This was done this way due to transformer...
  3. OdessaEE

    Service Entrance Conductor Grounding to Substation

    Here is the scenario: There is a substation outside our gas facility (approximately 800'). We are running a set of conductors (6 -750MCM per phase underground) from a dedicated substation breaker to the main switchgear at the gas plant (MLO). This is the only connection to the substation from...

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