Distribution Transformer Harmonic Derating Guidelines

Measure the resistance of a diverse group of single and three phase distribution transformers from 60 Hz to 1500 Hz. Develop tables which indicate permissible harmonic loads for the folloowing load combinations:

  • 60 Hz and 6 pulse drives
  • 60 Hz and 12 pulse drives
  • 60 Hz and switch mode power supplies
  • 60 Hz and compact fluorescent lighting

Tagged: P2-4, P4, Equipment Testing/Evaluation, Engineering Guidelines