Vacuum switch tube for circuit breaker

The vacuum switch tube is the core component of the medium and high voltage power switch. Through the excellent insulation of the vacuum in the tube, the medium and high voltage circuit can quickly extinguish the arc and suppress the current after the power is cut off, thereby avoiding accidents and accidents.

Category: Vacuum switch tube

key word : Vacuum switch tube for circuit breaker

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Product Details

Vacuum interrupter, also known as vacuum switch tube, is the core component of medium and high voltage power switch. It is mainly used in power transmission and distribution control system, as well as distribution system of metallurgy, mining, petroleum, chemical industry, railway, broadcasting, communication, industrial high frequency heating, etc. It is through the tube vacuum excellent insulation, so that the high voltage circuit can quickly extinguish the arc and inhibit the current after cutting off the power supply, so as to avoid accidents and accidents. The vacuum interrupter has the characteristics of energy saving, material saving, fire prevention, explosion prevention, small size, long life, low maintenance cost, reliable operation and no pollution. In terms of use, the vacuum interrupter is divided into circuit breaker interrupter and load switch interrupter, the former is mainly used for substations and grid facilities in the power sector, the latter is mainly used for end users of the grid.

Vacuum switching devices, including vacuum interrupter, use the characteristics of high vacuum gap pressure and high vacuum arc conduction current to complete the on-off function. The basic structure of this type of device includes a moving electrode, a fixed electrode and an arc shield. Under vacuum sealing conditions, the opening and closing actions of the moving and fixed electrodes can be manipulated at will to achieve the purpose of on-off AC circuits. Vacuum switch devices include vacuum interrupters, vacuum contactors, vacuum breakers and vacuum load switches. They have the advantages of short action stroke, closed arc, good on-off performance, low maintenance rate, long life, small size and light weight. It is widely used in vacuum switch devices, high-voltage transmission devices, power distribution devices, armor control devices and motor starting devices.

Vacuum switch tubes can be divided into various types according to different contact structures and insulating shell materials, such as flat contact structures, contact structures that generate transverse or longitudinal magnetic fields, and contact structures that combine longitudinal and transverse magnetic fields. Insulating shell materials are divided into glass shell vacuum switch tubes, ceramic shell vacuum switch tubes and microcrystalline glass shell vacuum switch tubes. These different types of vacuum switch tubes are suitable for specific operating conditions, such as breaking high-voltage DC, triggering ignition, cutting off high-frequency current and other special application scenarios.