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L20 / Three-phase transformers

Three-Phase Transformers I

Build three-phase banks and distinguish winding, line, and bank relationships.

to be released26 slides

This lecture's concept outline

L20

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Original slide headings26
  1. 1Lecture outline
  2. 2Starting problem
  3. 3Three identical single-phase units
  4. 4Winding and bank conventions
  5. 5Wye connection quantities
  6. 6Delta winding
  7. 7Delta current factor
  8. 8Wye and delta factors
  9. 9Y–Y bank
  10. 10Δ–Δ bank
  11. 11Y–Δ bank
  12. 12Delta on H, wye on L
  13. 13Bank voltage and current ratios
  14. 14Neutral and grounding
  15. 15Example: data
  16. 16Example: solution route
  17. 17Example: winding currents
  18. 18Example: wye–wye voltages
  19. 19Example: wye–wye power
  20. 20Example: delta–wye voltages
  21. 21Example: delta–wye power
  22. 22Example: solution check
  23. 23Practice: model and calculation
  24. 24Practice: solution
  25. 25Connection-factor summary
  26. 26Closing check
Slide source

L20_three_phase_transformers_i/L20_three_phase_transformers_i.pdf

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EXPLORE

Experiment workspace

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Experiment direction for this lecture

Switch bank connections and inspect winding versus line ratios.

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COMPUTE

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CHECK

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