Function And Operation Method Of High Voltage Isolating Switch

high voltage isolator is an important switchgear 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 high voltage isolator switch? How to operate hv isolator? These answers are told to you by the editor of Leerwo Electric:

The role of hv isolator switch
high voltage electrical isolator has a clear segmentation gap, so it is mainly used to isolate high-voltage power supply, 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 short-circuit current. Because the isolating switch has a clear segmentation gap, it is usually used in conjunction with a circuit breaker.
isolator high voltage operation method:
1. Operation when closing the high-voltage disconnector
(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 disconnector is operated, check whether it is closed. After closing, the disconnector should be fully inserted into the fixed contact and check the tightness of the contact.
2. Operation when opening the high-voltage disconnector
(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 disconnector, it should be quick and decisive so that the arc can be extinguished quickly.
(2) After opening the disconnector, check that each phase of the disconnector is indeed in the disconnected position and the blade should be pulled as far as possible.