Instrument is settled to telescopic general type partial discharge detector sensor, including the telescopic link, the one end of telescopic link installation fixing base, the first head that turns to of installation on the fixing base firstly turns to overhead installation superfrequency type arrangement seat, and the other end installation second of telescopic link turns to the head, and it is first that turn to firstly and the second turns to and overheadly respectively is equipped with one and turns to the head end fluted disc, and every turns to the middle part of head end fluted disc and opens the hole. The arrangement seat that the different grade type was changed to its accessible is applicable to two kinds of methods of ultrasonic wave partial discharge detection and superfrequency partial discharge detection, and structural design is ingenious, can light and handy change arrangement seat. The utility model discloses a telescopic operation rod can be according to the high accurate length of adjusting the action bars of the scene equipment of awaiting measuring, and telescopic structural design saves space, can let convenient this the arrangement instrument that carries of partial discharge tester.