Alternating frequency current withstand voltage experiment monitoring device with protection function

The invention relates to the technical field of voltage withstand test monitoring devices, and discloses an alternating-frequency current voltage withstand test monitoring device with a protection function. Comprising a fixing sleeve, symmetrical sliding grooves are formed in the upper portion of the fixing sleeve, a first sliding plate is slidably connected into the sliding grooves in the upper portion of the fixing sleeve, the first sliding plate is rotationally connected with limiting pieces at equal intervals in the circumferential direction through a mounting base, the limiting pieces are fixedly connected with plugs through mounting plates, and the fixing sleeve is fixedly connected with a top cover. The top cover is slidably connected with a sliding sleeve, symmetrical sliding grooves are formed in the lower portion of the fixing sleeve, and the sliding grooves in the lower portion of the supporting table are slidably connected with a second sliding plate. According to the invention, a plurality of cab