TRANSFORMERS

  • Routine testing;
    • Insulation Resistance (including absorption ratio & polarisation index)
    • Winding Ratio & Polarity tests
    • Measurement of winding resistance
    • Separate source over voltage withstand test (pressure)
    • High frequency Induced over-voltage withstand test (inter-turn)
    • Determination of magnetising current and no load losses
    • Determination of impedance voltage and full load losses
  • Special Testing;
    • TX partial discharge
    • Impulse up to 1MV
    • Temp rise tests
    • Sweep frequency response analysis
    • Power factor & capacitance test (Tan-delta)

ELECTRIC MOTORS

  • Load testing;
    • Up to 3.5MW, 4 pole, 11kv
    • Mechanical load (generator)
    • Back to back (Traction motors)
    • Output power
    • Efficiency
    • Commutation (DC motors)
  • No-load testing;
    • Up to 36MW, 11KV
    • Full speed, full voltage
    • Vibration
    • Bearing stabilisation
    • Input power
    • No load currents
  • Special testing;
    • Open circuit/Short circuit
    • Locked rotor
    • Separation of losses