The moving contact system of GW 16 and GW 17 products is a manipulator type single-arm folding type. The transmission part is sealed in the conductive tube of the main knife and is not affected by the external environment. The balance spring in the conductive tube of the main knife is used to balance the heavy torque of the main knife, making the opening and closing action very light and balanced. The movable contact adopts clamping structure to clamp the conductive rod of the stationary contact, and the clamping force is guaranteed by the clamping spring in the conductive tube. The top pressure trip device is used to ensure the reliable closing of the disconnector. Under the action of external forces such as wind, earthquake and electrodynamic force, the disconnector will always be in good working condition. The conduits of the main knife and grounding knife are made of rust-proof aluminum alloy, all exposed connecting bolts and nuts are made of stainless steel, and the fixed base and other steel products are treated with hot dip galvanizing technology, so that the disconnector has better corrosion and rust-proof performance. This series of disconnectors completely changed the disadvantages of other traditional disconnectors in the past, so that the disconnectors can be maintained for many years. Practice has proved that GW 16 and GW 17 series products are the replacement products of disconnectors, which are recommended for users.