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What do I need to specify a neutral grounding transformer

Neutral grounding transformers are not sized by kVA. To properly specify a grounding transformer, the following parameters must be known:

  1. System Voltage & System BIL
  2. Continuous Neutral Current
  3. Fault Current & Duration
  4. Impedance
  5. Connection Type: Zig-Zag Autotransformer or Wye-Delta
  6. Enclosure Type
  7. Ambient Temperature
  8. Other Environmental Concerns