Abstract: The electrical test of GIS/GIL is usually carried out in assembly workshop. Due to product assembly, inflation and standing time is long and electrical test time is short. In order to improve test efficiency, the manufacturers usually adopt the technological process of assembling multiple products at the same time and then to conduct electrical test one by one. Therefore, the design of special electrical test apparatus is particularly important. According to the electrical test demand of an 1 100 kV GIS/GIL assembly workshop, the special test apparatus is designed to meet the demand of power frequency withstand voltage test, partial discharge test and impulse voltage test. The SF6 type test transformer and impulse voltage generator are used to reduce the height of workshop and save the construction investment. In order to determine the compensation capacity of power supply, the load capacitance current considering test apparatus is taken into account and calculated. In addition, ATP-EMTP is used to evaluate the influence of GIS/GIL capacitance, resistance and inductance on lightning impulse test waveform parameters, which can be referred by relevant test technicians.

    Key words: gas insulated switchgear; test apparatus; partial discharge; electrical test