Varelen Electric Co., Ltd

Special Transformer

High short circuit withstand capability

Insulated with an epoxy resin - environmentally friendly

Superior behavior on load changes

Reduce energy consumption

Special  Transformer
110kv power transformer
Special transformer
110kv transformers
high voltage transformers

Related product parameters

Main Specification
Transformer Type oil immersed
Rated capacity up to 20mva
Rated voltage up to 132kv
Frequency 50/60Hz
Phase 3 Phase
Winding material Copper /Aluminum
Insulation class A
Vector group YNd1d1
Cooling ONAN, KNAN
Dieletric liquid Mineral oil / Dimethyl Silicone/ Vegetable Oil
Tap changer Off-load or on-load


Pressure Relief Device

Tap changer

Oil temperature Indicator

Bucholz relay



For each transformer are prepared and issued a test report, in accordance with IEC 60076. except for routine tests, we also offer type tests and specialised tests to meet all customer requirements. We make what matters work for our customers in a safe and reliable way.


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
  • c) Determination of sound level for each method of cooling for which a guaranteed sound level is specified
  • Measurement of the power taken by the fan and liquid pump motors
  • Measurement of no-load loss and current at 90% and 110% of rated voltage

Special test

  • Partial discharge measurement
  • Measurement of sound level
  • Short-circuit withstand test
  • Determination of capacitances windings-to-earth, and between windings
  • Vacuum deflection test on liquid immersed transformers
  • Pressure deflection test on liquid immersed transformers

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