Function And Operation Method Of Vertical Fuse Disconnector

vertical fuse switch disconnector is an important switch in the electrical system of power plants and substations. It needs to be used in conjunction with high-voltage circuit breakers. It is divided into indoor and outdoor types according to the installation location, and single-column, double-column and three-column types according to the number of insulating pillars. There are optional devices for each voltage level. So what is the role of nhrt40 vertical fuse switch disconnector? How to operate a high-voltage disconnector? Lei Erwo has compiled an article to let you understand the role and operation method of high-voltage disconnectors in one minute:
1. The role of high-voltage disconnectors
The high-voltage disconnector has a clear segmentation gap, so it is mainly used to isolate high-voltage power supplies, ensure safe maintenance, and can switch on and off a certain small current. It does not have a special arc extinguishing device, so it is not allowed to cut off the normal composite power supply, let alone cut off the short-circuit current. Because the disconnector has a clear segmentation gap, it is usually used in conjunction with a circuit breaker.
2. Operation of high-voltage isolating switch
1. Operation when closing the high-voltage isolating switch
(1) Whether it is operated by manual transmission device or insulating operating rod, it must be quick and decisive, but do not use too much force at the end of closing to avoid damaging the equipment, deforming the mechanism, breaking the bottle, etc.
(2) After the isolating switch is operated, it should be checked whether it is closed. After closing, the isolating switch should be fully inserted into the fixed contact and the tightness of the contact should be checked.
2. Operation when opening the high-voltage isolating switch
(1) It should be slow and cautious at the beginning, and it should be quick when the blade outline leaves the fixed contact. Especially when cutting off the no-load current of the transformer, the charging current of the overhead line and cable, the small load current of the overhead line and the loop current, when opening the isolating switch, it should be quick and decisive so that the arc can be extinguished quickly.
(2) After opening the isolating switch, it should be checked that each phase of the isolating switch is indeed in the disconnected position and the blade should be pulled as far as possible.