GIS AC withstand voltage test breakdown positioning test system

The utility model discloses a GIS AC withstand voltage test breakdown positioning test system, and relates to the field of GIS power equipment AC withstand voltage tests. In a field test, breakdown iscompleted instantly, and in order to search a fault air chamber, a method of changing a GIS wiring mode for multiple times and carrying out a withstand voltage test in the wiring mode is often adopted. The system comprises a plurality of positioning testers and a data processing server, wherein the positioning testers are distributed on a GIS shell; each positioning tester comprises an ultrasonicsensor, a signal acquisition processing front end and a signal synchronizer; the ultrasonic sensors are electrically connected with the signal collecting and processing front ends to transmit ultrasonic signals, and the signal collecting and processing front ends are all connected to the signal synchronizer to achieve synchronous signal collection of the multiple signal collecting and processingfront ends and are connecte