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 is small, 10KV vacuum breaker is only about 10mm, the operating mechanism is small, the mechanical part is small, 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。 The arc time is short, and it is not about the size of the switch current, usually only half a week. 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。 After the arc extinguish, the medium of contact with the head clearance is fast, and the fault performance 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。 (4) due to unclog the wear is smaller when the breaking current, so the contact electrical life is long, open circuit for 30 to 50 times full capacity, rated current open circuit above 5000 times, the noise is small 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。 The same applies to open capacitance 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。 Due to its many advantages, it is widely used in substations, and the current models mainly include zn12-10, zn28a-10, zn65a-12, zn12a-12, VS1, ZN30, etc.