Analysis on the Burning Accident of 10kV Voltage Transformer

Voltage transformer (PT) is an instrument transformer, which is used to transform voltage on line. Chaoyang power supply company has occurred two 10kV three-phase five column voltage transformer burnt out accident. From the angle of accident analysis, the cause of the accident is analyzed. The main reason is the ferromagnetic resonance overvoltage. Based on the accident analysis and theoretical analysis and test, precautions and precautions to avoid similar accidents are put forward.