真空断路器特点
Characteristics of vacuum circuit breaker
①触头开距小，10KV真空断路器的触头开距只有10mm左右，操作机构的操作功就小，机械部分行程小，其机械寿命就长。
The open distance of the contact is small. The contact of the 10KV vacuum circuit breaker is only about 10mm. The operation work of the operating mechanism is small, the mechanical part is small and its mechanical life is long.
②燃弧时间短，且与开关电流大小无关，一般只有半周波。
2. The arcing time is short, and has nothing to do with the size of the switching current, usually only half cycle.
③熄弧后触头间隙介质恢复速度快，对开断近区故障性能较好。
(3) after the arc extinguishing, the contact gap has faster recovery speed and better fault performance.
④由于疏通在开断电流时磨损量较小，所以触头的电气寿命长，满容量开断达30-50次，额定电流开断达5000次以上，噪音小适于频繁操作。
(4) the electrical life of the contact is long, the full capacity is broken up to 30-50 times, the rated current is broken up to more than 5000 times, and the noise is small for frequent operation.
⑤体积小、重量轻。
It is small in volume and light in weight.
⑥适用于开断容性负荷电流。
6. It is suitable for open and capacitive load current.
由于其优点很多，所以广泛应用于变电站中，目前型号主要有：ZN12-10型、ZN28A-10型、ZN65A-12型、ZN12A-12型、VS1型、ZN30型等。
Because of its many advantages, it is widely used in substation. At present, the main types are: ZN12-10, ZN28A-10, ZN65A-12, ZN12A-12, VS1, ZN30, etc.