The product structure adopts three-phase together box type, the outlet and inlet line of sheath pipe, there is dry air in the box, electric spring operation mechanism is installed side of box, it can be used under the crucial environment.

• 本产品总体结构采用三相共箱式，套管进出线，箱体内为干燥空气，电动弹簧操动机构布置在箱体的侧面，可在较严酷的环境条件下可靠使用。