Mining transformers


Flame-proof mobile substation

The Explosion-proof Mobile Substation consists of mainly explosion-proof high voltage switch, explosion-proof transformer, and explosion-proof low voltage switch. The transformer is bolted to the high and low voltage switches.
  • 500kva explosion proof substation
  • EXD transformers
  • mining substations
  • 500kva mining substations
  • Coal mine substations.jpg
  1. 500kva explosion proof substation
  2. EXD transformers
  3. mining substations
  4. 500kva mining substations
  5. Coal mine substations.jpg

Excellent explosion-proof performance and mechanical strength

Vertically lifted structure adopted

Adopted cylinder-type HV winding to strengthen resistance to over-voltage

Excellent over-load resistance and insulated performance by using Dupont Nomex paper

Fire-proof, nonpoisonous air created

Low noise


Our product advantages

  • Iron core

    Iron core

    Superior silicon lamination for steel core, the lamination joint is processed by oblique cut angle and the latest new technology “seven-step”, which ensures small no-load loss and current.

  • Vertically lifted structure

    Vertically lifted structure

    Special anti-loose structure with vertical lifting ability, no internal looseness during transportation, easy to use and maintain

  • insulation material

    insulation material

    Main insulating material is C-class and Nomex paper is adopted, plus the oxygen-free copper winding, which ensures small partial discharge, small no-load and load loss, and low temperature rise.

  • Enclosure


    Excellent explosion-proof performance and sufficient mechanical strength. 

  • High voltage switch

    High voltage switch

    Equipped with rail wheels, strong impact resistance ability, detachable and adjustable rail gauge.

  • Low voltage switch

    Low voltage switch

    Multiple protective functions of overload, short circuit, leakage, leakage lockout, over-voltage, under-voltage and over temperature. 

Related product parameters

Main Specification

Transformer type

Three phases, dry type



Rated capacity

Up to 8000kVA 

Rated voltage

Up to 10kV

Insulation class


Cooling mode


Explosion-proof type


Connection code

Yd, Dyn, Yyn etc.

Protection classIP54 IP55

Executive standard


Factory Test & Report


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”


Mining Flame-proof Mobile Substation is designed especially for the environment of methane mixture gas, coal dust and potentially explosive areas. It’s widely used in coal mines, non-ferrous metal mines, tunnel projects etc.
coal mine.jpg
metal mine.jpg
tunnel enginer.jpg
Tunnel (1).jpg


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Varelen Electric Co., Ltd

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