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Testing
Testing
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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
Workshops
Transport
Cranage
Drying Ovens
VPI Plants
Testing
Engineering & Design
Training
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