Working Mechanism Of High Voltage Isolating Switch

High Voltage Isolator Switch ensures the safety of high-voltage electrical appliances and devices during maintenance work, and plays the role of isolating voltage. It cannot be used to cut off, put in load current and break short-circuit current. It can only be used for certain switching operations that do not generate strong arcs, that is, it does not have an arc extinguishing function; 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 equipment for each voltage level. It can also reliably isolate the part of the high-voltage distribution device that needs to be shut down from the live part to ensure the safety of maintenance work. The contacts of the high-voltage isolating switch are all exposed to the air and have obvious disconnection points. The isolating switch has no arc extinguishing device, so it cannot be used to cut off load current or short-circuit current. Otherwise, under the action of high voltage, the disconnection point will generate a strong arc, which is difficult to extinguish by itself, and may even cause arcing (relative to ground or phase-to-phase short circuit), burn equipment, and endanger personal safety. This is the so-called "load-pulling isolating switch" serious accident.
High-voltage isolating switches can also be used to switch certain circuits to change the operation mode of the system. For example: In a double bus circuit, a high-voltage disconnector can be used to switch the running circuit from one bus to another.