Dry type transformers


Cast resin transformer

Non-flammable and self extinguishing,Enviromental friendly
  • epoxy cast resin transformers
  • dry type power transformers
  • epoxy resin transformer
  • custom winding.jpg
  1. epoxy cast resin transformers
  2. dry type power transformers
  3. epoxy resin transformer
  4. custom winding.jpg

E2 Environmental class

C2 Climate class

F1 Fireproof class

Maintenance free, Sustainable

High voltage multilayer segmented cylindrical structure, low voltage longitudinal airway foil structure

Vacuum pressure casting technology of H-class epoxy resin, with lower partial discharge

Thin insulation structure, cold and thermal shock for crack resistance

Our product advantages

  • Magnetic Core

    Magnetic Core

    The three-limb iron core is made of oblique cut Grain-oriented, seven-step silicon steel laminations insulated on both sides, guaranteeing low losses and low noise. These values are even improved by laser treatment. It is protected on the surface with a flash-proof varnish in order to prevent the sheet from corrosion and to reduce the noise. 

  • Clamping frame

    Clamping frame

    Clamping frame processed by CNC cutting, bending and then one-time punch forming, the hole’s size is accurate and the appearance looks delicate. 

  • winding


    The  winding coil  is made of oxygen-free copper, class H for main insulation materials and coil is insulated by NOMEX paper of DUPONT brand, LV winding is isolated by copper foils. All these make the heat-resistant is up to 220℃, with excellent overload capacity and low loss, but high efficiency.

Related product parameters

Main Specifications

Dry-type transformer type 

Cast resin 

Rated capacity 


Rated Voltage 



single or three phase 


With tapping links or on-load tap changer 


On request 


50/ 60Hz   

Vector groups 

Dy, Yy, Yd as standard. Other on request  

Winding materialCopper/ Aluminum

Class insulation 

According to IEC 60085, Class F or Class H 

Temperature rise 

With ambient temperature in accordance with IEC 60076-11

Type of cooling 


IP rate 

IP00 to IP54  


Environment class 


Climate class 


Fireproof class 


Standard IEC60076/ ANSI
Cast  Resin Dry Type Transformer Accessories
  1. Temperature monitoring PT100

  2. Anti-Vibration Pads

  3. Fans

  4. Enclosure

  5. Tap changer

  6. Temperature control relay

Factory Test

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     

  a) Measurement of winding resistance      

  b) Measurement of voltage ratio and check of phase  displacement 

  c) Measurement of short-circuit impedance and load loss

  d) Measurement of no-load loss and current      

  e) Separate-source AC withstand voltage test     

  f) Induced AC withstand voltage test    

  g) Partial discharge measurement

    Type test           

  a) Partial discharge measurement   

  b) Temperature-rise test    

    Special test  

  a) Lightning impulse test      

  b) Measurement of sound level          

  c) Short-circuit test                                                                                      


Dry type transformer is suitable for power transmission and distribution system, solar power plants,hotel, restaurant, hospitals, shopping malls, bank buildings ,stadiums, airports, stations.Renewable energy.
epoxy resin vacuum cast transformer
winding power


packed with of wooden case
dry type transformers.jpg
wooden case.jpg
wooden case-1.jpg

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Contact us

Varelen Electric Co., Ltd

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