Online air supply method of SF6 electric equipment

The invention provides an online air supply method of SF6 electric equipment. The method comprises the following steps: (S1) an air supply tank is mounted, and is connected with the SF6 electric equipment through a connecting hose; an electromagnetic valve is arranged between the connecting hose and the SF6 electric equipment; a suction pump is arranged between the connecting hose and the air supply tank; and the connecting hose is connected with a vacuum pump between the electromagnetic valve and the suction pump; (S2) the pressure in the SF6 electric equipment is detected in real time; and the air leakage of the SF6 electric equipment is judged according to the pressure; (S3) when the SF6 electric equipment leaks air, the vacuum pump is started to vacuumize the connecting hose; and (S4)the vacuum pump is stopped; and the electromagnetic valve, the suction pump and the air supply tank are started to supply the air to the SF6 electric equipment. On the one hand, the air supply intelligence and automation of t