TRANSFORMER TESTING
Transformers are an important component of the power system and are expected to find increased demand with thrust on infrastructure development.
Testing Facilities
- Measurement of winding resistance
- Temperature-rise test
- Separate source ac withstand voltage test
- Induced overvoltage test
- Measurement of insulation resistance
- Measurement of voltage ratio and Check of phase displacement/voltage vector relationship
- Measurement of short-circuit impedance and Load loss
- Measurement of no-load loss and current
- Measurement of zero sequence impedance(s) on three-phase transformers
- Measurement of neutral current
- Pressure test (Type test)
- Pressure test (Routine test)
- Measurement of harmonics of no-load current
- Measurement of no-load current at 112.5% voltage
- Magnetic balance test on 3-phase transformer
- Permissible flux density and over fluxing
- Oil leakage test
- Determination of sound level
- Determination of capacitances windings-to earth, and between windings
- Measurement of dissipation factor (tan delta) of the insulation system capacitance
- Lightning impulse test
For Transformer Testing:-
Applicable standard
1) For distribution transformer : IS 1180,IEC 60076, CBIP Manual on Transformer
2) For power transformer : IS 2026,IEC 60076, CBIP Manual on Transformer
3) For dry-type transformer: IS 11171, IEC 60076. CBIP Manual on Transformer
4) For reactor: IS 5553