What is a high voltage permanent magnet switch?
1. The high-voltage vacuum circuit breaker is named because the arc extinguishing medium and the insulating medium in the contact gap after arc extinguishing are both high vacuum; It has the advantages of small size, light weight, suitable for frequent operation, and can extinguish fire without maintenance, and is widely used in distribution networks. 1893, Rittenhouse, USA proposed a vacuum interrupter with simple structure, and obtained a patent for its design. 1920, Swedish Foga company made the vacuum switch for the first time.
2. Due to the progress of vacuum material smelting technology and the breakthrough in the research of vacuum switch contact structure, the production of vacuum circuit breakers with 15 kV and breaking current 12.5 kA was started in 196 1 year. 15kV, 26kA, 3 1.5kA vacuum circuit breakers were successfully trial-produced in 1966, which enabled the vacuum circuit breakers to enter the power system with high voltage and large capacity. In the mid-1980s, the breaking capacity of vacuum circuit breakers has reached 100 kA. ? China started to develop vacuum switches from 1958. 1960, Xi jiaotong university and Xi' an switch rectifier factory developed the first batch of vacuum switches with 6.7 kV and 600 A breaking capacity. Then a three-phase vacuum switch with 65438±00kV and breaking capacity of 65438±0.5 kA was made.
Working principle of high voltage permanent magnet switch
The working principle of vacuum circuit breaker is: when the moving and static contacts are opened under the action of the operating mechanism, an arc is generated between the contacts, and high-temperature steam is released on the surface of the contacts. Because the contacts are designed in special shapes, a magnetic field is generated when the current passes through, and the arc moves rapidly along the tangent direction of the contact surface under the action of the magnetic field, and part of metal vapor is condensed on the metal cylinder (shielding cover), so that the arc naturally goes out when it crosses zero, and the insulation strength between the contacts quickly recovers.
Well, the above are some introductions of the high-voltage permanent magnet switch introduced by Bian Xiao. Presumably, after listening to Bian Xiao's detailed introduction of high-voltage permanent magnet switch, everyone has a certain understanding. Simply put, this switch is a good combination of electricity and natural forces, thus realizing the function of the switch. This switching effect is also very good. Interested friends can also try. Well, that's what Bian Xiao introduced about the high-voltage permanent magnet switch.