Intelligent protective device of withstand voltage equipment at site

The utility model relates to an intelligent protective device at a high-pressure testing site, in particular to an intelligent protective device of withstand voltage equipment at site. The intelligent protective device of the withstand voltage equipment at site comprises a switch, an alternating current power supply, an automatic coupling voltage regulator, a voltmeter, an ampere meter, and a boosting transformer, and is characterized in that a zero line and a firing line are respectively connected with the switch and the zero line and the firing line are simultaneously connected with an alternating current contactor. An outgoing line of the alternating current contactor is connected with the automatic coupling voltage regulator, and an outgoing line of the automatic coupling voltage regulator is connected with an overcurrent protection relay. A normally open contact is in series connection with the alternating current contactor, and the overcurrent protection relay is in series connection with the boosting t