Dry type transformers

Dry type transformersOil immersed transformersMining transformersPhase-shift Rectifier transformersSpecial transformersIntegrated substationsReactors

Epoxy cast resin dry-type transformer

High voltage multilayer segmented cylindrical structure, low voltage longitudinal airway foil srtucture, Insulation class H
  • 630kva dry transformer
  • 1000kva transformer
  • cast resin transformer.jpg
  • cast coil transformer
  • 2500kva cast resin transformers.jpg
  1. 630kva dry transformer
  2. 1000kva transformer
  3. cast resin transformer.jpg
  4. cast coil transformer
  5. 2500kva cast resin transformers.jpg

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

High temperature curing, high insulation , dust and moisture proof

High quality silicon steel, with low loss, low noise characteristics

Oxygen free copper coil, low resistance,  high efficiency

Insulating level achieves Grade H

E2 environmental class

C2 Climate class

F1 Fireproof class

Our product advantages

  • Iron core

    Iron 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 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 

Manufacturing standards 

IEC, ANSI, NFC52 etc

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

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 


Factory Test & Report

630kva-test report.jpg

Factory Advantages

  • Personalized customization

    Only Focused on transformers, but we offer customized different types of transformers.

  • +20 years experience

    +20 years experience R&D team, derived from a 60 years history transformer factory in Changsha city of China.

  • Drew up the National Standard for Mining Explosion-proof Substation

    GB8286 (Mining explosion-proof Mobile Substations)the product of National standard that origin and inheritor,Unique designing for customers' convenience,like “Vertically Lifting”


Dry type transformer is suitable for power transmission and distribution system, hotel, restaurant, hospitals, shopping malls, bank buildings ,stadiums, airports, stations especially heavy load centers and places with special fire protection requirements.
power plant


wooden case packing.jpg
wooden case packing
wooden case packing

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Varelen Electric Co., Ltd

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