Vacuum interrupter, also known as the vacuum switching tube, is the core component of the medium and high voltage power switch, its main role is to make the medium and high voltage circuit cut off the power supply through the tube of the vacuum of excellent insulation can quickly quench the arc and inhibit the current, to avoid accidents and accidents, mainly used in the transmission and distribution of electric power control system, but also in metallurgy, mining, petroleum, chemical industry, railways, broadcasting, communications, industrial high-frequency heating and other power distribution systems. system. With energy saving, material saving, fire prevention, explosion-proof, small size, long life, low maintenance costs, reliable operation and no pollution and so on. Vacuum interrupter is divided into circuit breaker interrupter room and load switch interrupter room from the use of circuit breaker interrupter room is mainly used in the power sector in the substation and grid facilities, load switch interrupter room is mainly used for the end user of the power grid.
composition
1. Moving conductive rod
2. Guide sleeve
3. Bellows
4. Moving cover
5. Bellows shielding cover
6.Magnetic shell
7. Shielding tube
8.Contact system
9. Static conductive rod
10.Static cover plate
Classification
According to the shell: glass vacuum interrupter, ceramic vacuum interrupter.
According to the use of points: circuit breaker with a vacuum interrupter, load switch with a vacuum interrupter, contactor with a vacuum interrupter, recloser vacuum interrupter, sectionalizer with a vacuum interrupter and other special purpose vacuum interrupter.
Working Principle
Vacuum bubble within the vacuum interrupter is the use of high vacuum insulation arc extinguishing medium, sealed in a vacuum pair of contacts to achieve the power circuit function of an electric vacuum device. When it breaks a certain value of the current, static and dynamic contacts in the separation of the moment, the current contraction to the contacts just separated on a point, there is a sharp increase in resistance between the electrodes and the temperature increases rapidly until the electrode metal evaporation occurs, at the same time the formation of a very high electric field strength, resulting in a very strong launch and gap breakthrough, resulting in a vacuum arc, when the frequency current is close to zero, but also the contact opening distance increases, the vacuum arc of the Plasma quickly spread to the surrounding area, the arc current over zero, the medium of the contact gap quickly from the conductor into an insulator, so the current is broken. Due to the special structure of the contact, the contact gap during the arc will produce the appropriate longitudinal magnetic field, the magnetic field can make the arc uniformly distributed on the surface of the contact to maintain a low arc voltage, so that the vacuum interrupter room has a high arc after the medium strength recovery speed, small arc energy and small corrosion rate. In this way, it improves the ability of the vacuum interrupter to open the current and service life.
CONTACT US
Shaanxi Huadian Electric Co., Ltd. is located in Baoji High-tech Development Zone, Shaanxi Province. It is a modern high-tech enterprise specializing in the production of vacuum interrupters. For more information about it, please contact：
Email: pannie@hdswitchgear.com
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