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 contact distance of the 10KV vacuum circuit breaker is only about 10mm, the operation of the operating mechanism is small, the mechanical part of the stroke is small, and the 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。

The arc duration is short and has nothing to do with the magnitude of the switch current, 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) the medium recovery speed of the contact gap after arc extinguishing is fast, and the fault performance of the near fault zone is better.

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。

Due to the small amount of wear when the current is cut off, the electrical life of the contact is long, the full capacity is broken to 30-50 times, the rated current is broken more than 5000 times, the noise is small, and it is suitable for frequent operation.

⑤体积小、重量轻。

Small size and light weight.

⑥适用于开断容性负荷电流。

It is suitable for breaking 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, the current models are: ZN12-10, ZN28A-10, ZN65A-12, ZN12A-12, VS1, ZN30 and so on.