Power Transformer Test Services
Power Transformer Tests
- Transformer capacitance and power factor/dissipation factor measurement
- Bushings capacitance and power factor/dissipation factor measurement
- Exciting current measurement
- Winding insulation resistance measurement
- Transformer turns ratio (TTR) measurement
- DC winding resistance measurement and OLTC verification
- Vector group check
- External protection equipment tests
Electrical Insulating Oil Tests
- Oil dissipation factor measurement (ASTM D-924)
- Testing of oil acid and base number by color-indicator (ASTM D-974)
- Determination of the breakdown voltage of insulating oil (IEC 156)
- Oil tests for interfacial tension of insulating liquids against water (ASTM D-971)
- Testing for water in insulating liquids (ASTM D-1533)
Neutral Grounding Resistor Tests
- Insulation resistance measurements
- Resistance measurements
- Current transformer tests
- Voltage transformer tests