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Technical Article

 

HV and LV coils for resin insulated dry type transformers

08-11 2025 | By:

 HV and LV coils for resin insulated dry type transformers 

Transformer winding
•cast resin windings have high mechanical strength and no partial discharge
•thansformer coils are manufactured with aluminium or copper conductors
•Designed with HV/LV foil winding and round wire winding
•our team cast resin winding technology, resin guarantees the best dielectric performance, short-circuit resistance, and long-term reliability, customized up to 15mva transformer winding
•make dry type windings a cost-effective choice for customers looking to optimize their transformer investments, especially for applications where maintenance and safety are critical concerns.
•transformer winding are not subjected to wetting and polluting
•Operation safety, transformer winding are not flammable and can not be a source of fire

 

 

High-Voltage (HV) and Low-Voltage (LV) cast resin winding coils,

High-Voltage (HV) and Low-Voltage (LV) cast resin winding coils

 HV and LV coils for resin insulated dry type transformers 

Main Specification
Transformer Type cast resin
Rated capacity up to 15mva
Rated voltage up to 36kv
Frequency 50/60Hz
Phase 3 Phase
Winding material Copper /Aluminum
Insulation class F, H, C
Vector group Dyn11, Yyn0,
Climate  C5
Environmental  E4
Fire behaviour F1
Temperature operation +50~  -60℃
Short circuit resistance 4-8%( on request)
Standard IEC, AS, EN, IEEE, GOST

 HV and LV coils for resin insulated dry type transformers 

Routine test

  • Measurement of winding resistance
  • Measurement of voltage ratio and check of phase displacement
  • Measurement of short-circuit impedance and load loss
  • Measurement of no-load loss and current
  • Separate-source AC withstand voltage test
  • Induced AC withstand voltage test
  • Partial discharge measurement

Type test

  • Lightning impulse test
  • Temperature-rise test

Special test

  • Partial discharge measurement
  • Measurement of sound level
  • Short-circuit test










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