Coal Industry

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Industry Overview

To ensure the safe, stable and reliable operation of power supply systems in coal mines, detect potential electrical equipment defects in advance, and comply with relevant safety standards and regulations.

Test Objects (Tested Specimens)Test ItemsIEC StandardsANSI/IEEE/ASTM Standards
Mining Explosion-Proof MotorsWinding resistance, Insulation resistance, DC/AC Withstand voltage, Temperature rise, Vibration & noise, No-load & load test, Explosion-proof structure check, Insulation testIEC 60034-1, IEC 60034-5, IEC 60079-0, IEC 60079-1, IEC 60060-1IEEE 115, IEEE 43, IEEE 841, NEMA MG 1, ANSI C50.41
Mining Distribution & Traction TransformersWinding resistance, Voltage ratio, Insulation resistance, Dielectric loss (tanδ), Partial discharge, Temperature rise, No-load & load loss, Short-circuit withstandIEC 60076-1, IEC 60076-5, IEC 60076-11, IEC 60567, IEC 60156IEEE C57.12.00, IEEE C57.12.90, IEEE C57.13, NETA ATS
Mining High-Voltage SwitchgearInsulation resistance, Withstand voltage, Contact resistance, Mechanical operation, Interlock test, Short-circuit withstand, Partial dischargeIEC 62271-1, IEC 62271-100, IEC 61439-1, IEC 60060-1IEEE C37.06, IEEE C37.20.1, ANSI C37.10, NETA ATS
Mining Vacuum Circuit BreakersContact resistance, Insulation test, Vacuum degree check, Mechanical characteristics, Overload & short-circuit test, Withstand voltageIEC 62271-100, IEC 60060-1, IEC 60947IEEE C37.04, IEEE C37.13, NETA ATS
Current & Voltage Transformers (CT/VT)Ratio & phase error, Polarity, Excitation characteristic, Insulation resistance, Withstand voltage, Partial dischargeIEC 61869-1, IEC 60044-1, IEC 60044-2, IEC 60060-1IEEE C57.13, IEEE C57.13.1, IEEE C37.2
Mining Power & Control CablesConductor resistance, Insulation resistance, AC withstand voltage, Partial discharge, Flame retardancy, Oil resistance, Bending & thermal cycle testIEC 60502, IEC 60840, IEC 60228, IEC 60332IEEE 400, IEEE 400.2, ICEA S-94-649, UL 44
Mining Surge ArrestersInsulation resistance, Leakage current, Lightning impulse withstand, Operating voltage, Thermal stability, Discharge capacityIEC 60099-4, IEC 60099-6, IEC 61000-4-5IEEE C62.11, IEEE C62.22, ANSI C37.20.1
Mining InsulatorsInsulation resistance, AC withstand voltage, Wet withstand voltage, Pollution flashover test, Mechanical strength testIEC 60383-1, IEC 60383-2, IEC 60507, IEC 61109IEEE 43, IEEE C29.1, IEEE C29.2
Mining Variable Frequency Drives (VFD)Input/output test, Harmonic test, Efficiency, Overload protection, EMC, Dynamic response, Short-circuit protectionIEC 61800-1, IEC 61800-4, IEC 61000-4, IEC 62933IEEE 519, IEEE 1547, IEEE 1262
Protective Relays & Mine Monitoring SystemsRelay function test, Trip time calibration, Setting test, Communication test, Fault simulation, Interlocking testIEC 61850, IEC 60255, IEC 61508, IEC 61511IEEE C37.2, IEEE C37.90, IEEE 1547, ISA 84
Mining Earthing & Grounding DevicesGround resistance, Continuity test, Step & touch voltage, Lightning impulse test, Corrosion inspectionIEC 60364-4-41, IEC 62305-3, IEC 61312IEEE 81, IEEE 142, IEEE 1584
Insulating Oil for Mining TransformersBreakdown voltage, Moisture content, Dissolved gas analysis (DGA), Acidity, Viscosity, Dielectric lossIEC 60156, IEC 60567, IEC 60599, IEC 60814ASTM D877, ASTM D1533, ASTM D3612, ASTM D974

Applicable scene

  • Open-pit coal mine
    Open-pit coal mine
  • Open-pit coal mine1
    Open-pit coal mine
  • Underground coal mine
    Underground coal mine
  • Underground coal mine1
    Underground coal mine

Equipment selection

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