Varelen Electric Co., Ltd

Mining Substation

Special & harsh environmental

Excellent explosion-proof performance and mechanical strength

220 ℃ resistance grade

Flameproof Group IIB, Zone 1, Zone 2

Mining Substation

Related product parameters

Main Specification
Transformer Type dry type
Rated capacity up to 8000kva
Rated voltage up to 11kv
Frequency 50/60Hz
Phase 3 Phase
Winding material Copper /Aluminum
Insulation class H, C
Vector group YNd1d1
Cooling AN
Protection Enclosure IP00 to IP54
Explosion-proof type ExdIMb
Zone Zone 1, Zone 2



Mining Flame-proof Mobile Substation  is designed specially for 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.

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.




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.

flameproof dry type substation


Routine test

  • Measurement of winding resistance
  • Measurement of voltage ratio and check of phase displacement
  • Measurement of short-circuit impedance and load loss
  • Measurement of no-load loss and current
  • Separate-source AC withstand voltage test
  • Induced AC withstand voltage test
  • Partial discharge measurement

Type test

  • Lightning impulse test
  • Temperature-rise test

Special test

  • Partial discharge measurement
  • Measurement of sound level
  • Short-circuit test

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