Mining transformers

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Flame-proof transformers

Excellent over-load resistance and insulated performance by using Dupont Nomex paper
  • mining transformer
  • 2000kva explosionproof transformer
  • mining type transformer
  • flameproof mobile transformer
  • mine explosionproof transformer
  1. mining transformer
  2. 2000kva explosionproof transformer
  3. mining type transformer
  4. flameproof mobile transformer
  5. mine explosionproof transformer

Excellent explosion-proof performance and mechanical strength

Vertically lifted structure adopted

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

Fire-proof, nonpoisonous air created,

Low noise

Maintenance-free

Adopted cyliner-type HV winding to strengthen resistance to over-overltage

Integrated HV and LV winding, increase mechanical strengthen and shortcircuit resistance by vacuum

Our product advantages

  • VERTICALLY LIFTED STRUCTURE ADOPTED

    VERTICALLY LIFTED STRUCTURE ADOPTED

    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

    ENCLOSURE

    Excellent explosion-proof performance and sufficient mechanical strength. Protection class IP54 IP55

Related product parameters

Main Specification

Transformer type

Three phases, dry type

Frequency

50/60Hz

Rated capacity

Up to 8000kVA 

Rated voltage

Up to 10kV

Insulation class

H,C

Cooling mode

AN

Explosion-proof type

ExdIMb

Connection code

Yd, Dyn, Yyn etc.

Enclosure classIP54  IP55

Standard

IEC60076


Factory Test

For each transformer are prepared and issued a test report, in accordance with IEC 60079.  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 loss

 d) Measurement of no-load loss and current

 e) Dielectric routine tests

 f) Tests on on-load tap-changers, where appropriate

 g) Leak testing with pressure for liquid-immersed transformers(tightness test)

 h) Tightness tests and pressure tests for tanks for gas-filled transformers


 Type Test

 a) Temperature-rise type test

 b) Dielectric type tests

 c) Determination of sound level for each method of cooling for which a guaranteed sound level is specified


 Special Test

 a) Dielectric special tests

 b) Winding hot-spot temperature-rise measurement

 c) Determination of capacitances windings-to-earth, and between windings

 d) Measurement of dissipation factor(tanδ) of the insulation system capacitances

 e) Determination of transient voltage transfer characteristics

 f) Measurement of zero-sequence impedance(s) on three-phase transformers

 g) Short-circuit withstand test


Applications

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.
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Packing

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Contact us

Varelen Electric Co., Ltd

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