Power Transformer

•Varelen design power transformer can customized voltage up to 132KV
•High short circuit withstand capability
•Low loss and saving cost
•Customized transformers are available
• Compact dimensions and weight
• Long lifespan
•oil immersed power transformer use ester oil is that it is not flammable, superior fire safety
•7-step stepping lap iron core structure , Iron Cores are made of cold rolled grain oriented silicon steel, with low loss
•High-Temperature and Low Temperature Resistant Insulation System

Main Specification
Transformer Type	oil immersed
Rated capacity	30KVA to 40MVA
Rated voltage	up to 132kV
Frequency	50/60Hz
Phase	single phase or three phase
Winding material	Copper /Aluminum
Insulation class	A (105℃），E (120℃), B (130℃)
Vector group	Dyn11 YNd1d1，etc.
Cooling	ONAN, KNAN ，ONAF，KNAF
Dieletric liquid	Mineral oil, Silicone, FR3 Oil, Midel etc.
Tap changer	Off-load or on-load
Abmient temperature	-45℃ ~+50℃
Standard	IEC, AS, EN, IEEE, ANSI, GOST
Accessories	Conservator, Pressure Relief Device Tap changer, Oil temperature Indicator Bucholz relay, Lifting lugs

•All transformers can be designed, customized, and supplied with a wide variety of accessories, as required.
- - Varelen Custom Products include:
  - •K-Factor Rated
  - •Harmonic Mitigation
  - •Custom Dimensions for Size & weight constraints
  - •Custom enclosures for tough environmental conditions
  - •Unique input and output voltages
  - •Low inrush Current
  - •6, 12 and 18, 24 and 36 pulse drive isolation transformers
  - •Rectifier Duty
    - - •High Efficiency
      - •Low Audible Noise
      - •Low Temperature Rise
      - •Marine Duty
      - •Hazardous Location

custom 15MVA power transformer

110KV oil immersed power transformer

Routine test

Type test

Lightning impulse test
Temperature-rise test
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

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Power Transformers