Ferroresonance Guidelines for Additional Padmount Transformer Types

Create guidelines specifying the maximum cable length which can be switched for the following types of transformers without excessive overvoltage.

  • Delta primary three-phase padmount transformer
  • Grounded-wye primary three-phase transformers having amorphous metal cores
  • Grounded-wye primary three-phase transformers having five-leg stacked cores.

Tagged: Equipment Testing/Evaluation, P1a-4, Engineering Guidelines, P4