Overload protection, Torque switch, Space heater, Manual handle, Junction box (Available except for Casing D1 &D2), Explosion proof (Available for Casing size B only

• 过载保护装置；扭矩开关；内置式加热器；手动操作机构；接线盒(尺寸D1和D2系列除外)；耐压防爆(仅用于尺寸B系列).