| 电流过零后能否重燃取决于弧隙介质强度的恢复 |
| 添加时间：2019/11/23 15:49:10 浏览次数： |
| 毋庸置疑，高压开关柜中最重要的电器就是高压断路器。真空断路器因其灭弧介质和灭弧后触头间隙的绝缘介质都是高真空而得名。 There is no doubt that the most important electrical equipment in the high-voltage switchgear is the high-voltage circuit breaker. The vacuum circuit breaker is named because its arc extinguishing medium and the insulation medium between contacts after arc extinguishing are all high vacuum. 真空断路器具有结构紧凑、体积小、重量轻、寿命长、维护量小、防燃、防爆和适于频繁操作等优点，目前在中压开关特别是10 kV户内产品中占绝对优势。 The vacuum circuit breaker has the advantages of compact structure, small volume, light weight, long service life, small maintenance, flame-proof, explosion-proof and suitable for frequent operation, etc., and now it has an absolute advantage in medium voltage switches, especially in 10kV indoor products. 真空断路器的主要灭弧机构是真空灭弧室，其灭弧原理与其他种类断路器灭弧原理不同，其他断路器主要利用灭弧介质来达到熄灭电弧的目的，而真空断路器是利用真空阻止电弧重燃来达到灭弧的目的。 The main arc extinguishing mechanism of vacuum circuit breaker is vacuum arc extinguishing chamber. Its arc extinguishing principle is different from that of other kinds of circuit breakers. Other circuit breakers mainly use arc extinguishing medium to achieve the purpose of arc extinguishing, while vacuum circuit breaker uses vacuum to prevent arc re ignition to achieve the purpose of arc extinguishing. 因此，电流过零后能否重燃取决于弧隙介质强度的恢复。若恢复了，则能有效的阻止电弧的重燃，否则，电弧会继续燃烧直到下一个过零点，才有可能熄弧。 Therefore, whether the current can be reignited after zero crossing depends on the recovery of the dielectric strength of the arc gap. If it is restored, it can effectively prevent the re ignition of the arc. Otherwise, the arc will continue to burn until the next zero crossing point, and it is possible to extinguish the arc. |
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