Isolating switch with fully-sealed structure

The invention relates to an isolating switch with a fully-sealed structure, which integrally adopts a three-phase split box structure, high-voltage bushing incoming and outgoing lines and a fully-sealed shell, is internally filled with SF6 gas, is positioned in the middle of a tank body and at a horizontal fracture, is externally provided with a switch-on and switch-off indicator, and is provided with optional grounding switch modules at two ends of the tank body, so that the single-double grounding requirement is met. A mutual inductor, a lightning arrester and other devices can be added according to user requirements to form an open-type combined electric appliance. The disconnecting switch is provided with an electric/manual operation mechanism to realize opening and closing operation. The isolating switch with the fully-sealed structure can solve the problems that a conductive part of a traditional open-type isolating switch is easily influenced by the environment to generate abnormal heat and a transmiss