Transformer Testing
High Voltage Power Transformer Testing :
HV / EHV TRANSFORMERS:-
On-site Diagnostic Testing of HV / EHV class of Transformers:
- Voltage Ratio and Vector group confirmation test
- Frequency Response Analysis (FRA)
- No-load excitation current measurement
- Capacitance and dissipation factor measurement of the inner insulation
- Capacitance and dissipation factor measurement of high-voltage bushings
- Impedance measurements (short-circuit impedance, zero sequence impedance, FRSL method)
- Analysis of winding damages with the FRA method
- Moisture analysis of paper insulation by dielectric method (PDC+ FDS)
- OLTC operation and dynamic contact resistance measurement
- Winding Resistance Measurement
- Thermography , Noise , Vibration Measurement
- Routine Oil test, DGA, Furan
- DP test of paper insulation
- On line & Off line Partial discharge measurements of transformers.Current Transformers on-site Testing of the HV/EHV class -It is intended to perform automatic testing by CT Analyser on-site for utilities with very less testing time or by Primary injection test. The following tests can be performed:
- Burden & CT winding resistance measurement
- CT excitation characteristics according to IEC 60044-1, IEC 60044-6 (TPS, TPX, TPY) and IEEE C57.
Potential Transformers on-site Testing of the HV/EHV class :-
- Capacitance and dissipation factor measurement
- Primary injection & Ratio test.
- Moisture analysis of paper insulation by dielectric method (PDC+ FDS).
- IR value with Polarization Index (PI) & Absorption Index (AI),
- DC Resistance measurement
On line & Off line Partial discharge measurements.
