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Efficient Power Transformer Technical Specifications for High Voltage Application

Explore detailed technical specifications of power transformers including winding types, cooling systems, insulation levels, and more for high voltage applications. Find information on transformer main parts, on-load tap changer, and motor drive.

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Efficient Power Transformer Technical Specifications for High Voltage Application

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  1. Transformer

  2. Standards • IEC 60076 Power transformers

  3. Transformer Main Parts • Three-limb core • LV Winding • HV Winding • Tapped Winding • Tap Leads • LV Bushings • HV Bushings • Clamping Frame • On-Load Tap Changer • Motor Drive • Tank • Conservator • Radiators

  4. Active Part

  5. Active Part

  6. Windings and Cores

  7. Conductors

  8. Papers

  9. Pressboards

  10. Oil

  11. Bushing

  12. Tank

  13. Conservator

  14. Breather

  15. Buchholz Relay

  16. Non Return (Shutter) Valve

  17. Pressure relief devices

  18. Thermometers

  19. Oil Level Indicator

  20. On Load Tap Changer

  21. On Load Tap Changer

  22. Motor Drive

  23. Cooling System

  24. Technical Specifications 1. 3-phase unit/bank of single phase units 2. Separate winding/auto transformer • Rated voltage (HV/LV/TV) 4. Rated frequency • Cooling system 6. Vector group • Rated power 9. Rated current (HV/LV/TV) 10. Insulation level (HV/LV/TV/Neutral) a) LIWL (winding /bushing) b) SIWL (winding /bushing) c) PFWL (winding /bushing) 11. Creepage distance

  25. Technical Specifications 12. Continuous power rating at principal tap: 12.1. at first stage of cooling a) HV Winding b)LV Winding c)TV Winding 12.2. at second stage of cooling a) HV Winding b)LV Winding c)TV Winding 12.3. at third stage of cooling a) HV Winding b)LV Winding c)TV Winding

  26. Technical Specifications 13. Maximum temperature rise a) Oil b) Winding c) Hottest spot 14. Insulation level (HV/LV/TV/Neutral) a) LIWL (winding /bushing) b) SIWL (winding /bushing) c) PFWL (winding /bushing) 15. Positive sequence impedance at 75oC on principle tapping (max./min. tap voltage) and: a) between HV & LV winding b) between HV & TV winding (if applicable) c) between TV & LV winding (if applicable)

  27. Technical Specifications 16. Rated short circuit strength on windings (HV/LV/TV) 17. Short circuit duration 18. No load losses 19. Load losses 20. Type of winding 21. Type of insulation of windings (uniform/graded) a)HV b)LV c)TV 22. Max. sound level (dB)

  28. Technical Specifications • Tap changer a) Type (oil/vacuum) b) rated current c) rated voltage d) total range e) total number of steps f) variation per step g) position of tapping h) insulation level

  29. Power Transformer Outline Drawing

  30. Distribution Transformer

  31. Distribution Transformer(Conservator Type)

  32. Distribution Transformer(Hermetically Sealed)

  33. Dry Type Transformer

  34. Shunt Reactors

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