Long air gap discharge test device at low air pressure

The invention relates to the field of high voltage and insulation technology, and more particularly to a long air gap discharge test device at low air pressure. The test device mainly includes a discharge test chamber, a vacuuming device, an air pressure monitoring device and a high-speed observation platform. The discharge test chamber consists of an external chamber, a reinforced structure combination, a liner, an optical tempered glass observation window, an adjustable rod-plate electrode system and the like. The chamber is overall nested in such a way that the reinforced structure combination is welded to the inside of the outer wall of the chamber and the liner is placed inside the reinforced structure combination. The connection among the various parts is that the test chamber is connected with the vacuuming device and the air pressure monitoring device to control and stabilize the pressure value of the test chamber. The discharge process of a long air gap discharge test is recorded through the tempered