Discharge breakdown protection device for withstand voltage test

The invention relates to the technical field of high-voltage electrical withstand voltage test equipment, in particular to a withstand voltage test discharge breakdown protection device. According to the over-current protection method for the voltage withstanding device, the detection element is connected in series to the ground wire end of the high-voltage side of the boosting transformer, the discharge breakdown condition of a high-voltage loop is directly detected, and a traditional method that over-current is detected through the input end of the boosting transformer in a voltage withstanding test is abandoned; meanwhile, the protection device adopts an electronic circuit and a silicon controlled rectifier as a switch for protecting action power-off, so that alternating-current zero-crossing power-off is realized in the shortest time after the equipment breaks down overcurrent, and the tested equipment is protected from continuous long-time discharge after withstand voltage breakdown to the greatest exten