The main on-site testing items for GIS equipment include:
(1) Main circuit insulation test.
(2) Auxiliary circuit insulation test.
(3) Mechanical characteristic test of circuit breakers.
(4) Gas sealing test.
(4) Opening and closing action test.
(5) If necessary, conduct a voltage withstand test.
(6) Determination of moisture content and purity of SF6 gas.
(7) SF6 gas density relay and pressure gauge calibration.
(8) Conduct partial discharge ultrasonic inspection test during operation.