Power Transformers
Our experienced specialists can perform the following diagnostic measurements on 400kV/150kV/33kV/20kV Transmission, Generation, Distribution and Renewable energy power transformers according to IEC 60076-1 and to Dry-type transformers according to IEC 60726:
- tan delta (dissipation factor) measurements of the insulation capacitances.
- Insulation resistance measurements of the insulation capacitances
- SFRA measurements.
- DFRA measurements
- Excitation currents measurements
- Transformer Ratio measurements and vector group verification.
- Winding static resistance measurements
- OLTC dynamic resistance measurements (DRM)
- Short-circuit impedance measurements
- Core / Yoke insulation measurements
- Transformer Oil laboratory and electrical tests
- Operation tests on transformer protection elements (Bucholz, silica gel, pressure relays, thermometers, etc)
Additional works on power transformers:
- Transformer repairs
- OLTC maintenance
- Transformer Bushings replacement
