TESTING OF SWITCHYARD EQUIPMENTS

TRANSFORMERS

Offline:

• Insulation Resistance, Polarization Index and Dielectric Absorption Ratio Test
• Capacitance and Tan Delta Test on Windings and Bushings.
• Winding Resistance Test.
• Turns Ratio and Phase Angle Test.
• Magnetic Balance and Magnetization Current Test.
• High Voltage Excitation Current Test.
• Sweep Frequency Response Analysis.
• Dielectric Spectroscopy or Recovery Voltage Measurement.
• Floating Neutral point voltage.

Online:

• Partial Discharge Test
• Thermography

CIRCUIT BREAKERS

• Insulation Resistance Test
• Contact Resistance Test
• Time Interval Test (Opening, Closing,Close-Open)
• DCRM

CURRENT TRANSFORMERS/VOLTAGE TRANSFORMERS

• Insulation Resistance Test
• Capacitance and Tan Delta Test
• Ratio Test
• Polarity Test
• Winding Resistance Test