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The disconnector has horizontal opened double-strut structure, and every single pole consists of base, post insulator, outlet base, contact and so on. The two post insulators are parallel, and they are vertically mounted on the bearing by the two sides of the base. The main conductive parts are repectively mounted on top of the two post insulators, and they are turning for 90° Along with the post insulators. The bearing base of the disconnector has totally-enclosed structure, it can prevent the dust, humidity and deleterious gas come into the inner of the bearing which could cause the block phenomenon. The ball thrust bearing and annular ball bearing is mounted in the bearing base for bearing the weight and the horizontal component to make sure that the operating force moment will not increase increase when the disconnector is running long. The two bearings of every pole are connecting and driving through the connecting board, adjusting screw and so on. It uses stainless steel shaft pin and self lubricating sleeve pipe, and the lubricant is molybdenum disulphide lithium grease. The red copper bradis in the outlet base are respectively fixed on the conducting rod and connecting board, and the connecting board is used for connecting the circuit. The contact fingers of the intermediate contact parts are assembled in pairs, it uses springs to clamp contact finger base and contact to improve the useful life. The fanning plates and arc plates in the base are used to insure the linking between main conductive loop an dground switch when the disconnector maches with ground switch. The ground switch can't switch-onwhen the main conductive loop is switching-on; The main conductive can't switch-on when the ground switch is switching-on.
| Type | Rated voltage(KV) | Rated current(A) | Rated short time withstand current(KA/S) | Rated peak value withstand current | Rated power frequency withstand voltage(1min) | Thunder impulse withstand voltage | ||||
| Main conductive loop | Ground switch | Main conductive loop | Ground switch | To earth | Interrupter | To earth | Interrupter | |||
| GW4-252(D)(W)/1250 | 252 | 1250 | 31.5/3 | 31.5/2 | 80 | 80 | 460 | 606 | 1050 | 1256 |
| GW4-252(D)(W)/1600 | 1600 | 40/3 | 40/2 | 100 | 100 | |||||
| GW4-252(D)(W)/2000 | 2000 | 50/3 | 50/2 | 125 | 125 | |||||
| GW4-252(D)(W)/2500 | 2500 | 50/3 | 50/2 | 125 | 125 | |||||