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高压断路器在高压电路中起操控效果，是高压电路中的重要电器元件之一。断路器用于在正常运行时接通或断开电路，毛病状况在继电保护设备的效果下敏捷断开电路，特殊状况（如主动重合到毛病线路上时）下可靠地接通短路电流。高压断路器是在正常或毛病状况下接通或断开高压电路的专用电器。

高压断路器的品种冗杂，一般可按下列办法分类：按断路器的安装地址分可分为户内式和野外式两种；按断路器灭弧原理或灭弧介质可分为油断路器、真空断路器、六氟化硫断路器等等。

1、 油断路器 选用绝缘油作为灭弧介质的断路器，称为油断路器。它又可分为多油断路器和少油断路器。

多油断路器中的绝缘油除作灭弧介质运用外，还作为触头断开后触头之间的主绝缘以及带电部分与接地外壳之间的主绝缘运用，多油断路用具有用油量多、金属耗材量大、易发生火灾或爆破、体积较大、加工工艺要求不高、耐用、价格较低一级特色。现在在电力系统中除35kv等单个类型的野外式多油断路器仍有运用外，其他多油断路器已中止出产和运用。

少油断路器中的绝缘油首要作为灭弧介质运用，而带电部分与地之间的绝缘首要选用瓷瓶或其他有机绝缘材料。这类断路器因用油量少，故称为少油断路器。少油断路用具有耗材少、价格低一级长处，但需求定时检修，有引起火灾与爆破的危险。少油断路器现在虽有运用，但已逐步被真空断路器和六氟化硫断路器等新式断路器代替。

2、 真空断路器 真空断路器，是使用“真空”作绝缘介质和灭弧介质的断路器。这儿所谓的“真空”能够理解为气体压力远远低于一个大气压的淡薄气体空间，空间内气体分子极为稀疏。真空断路器是将其动、静触头安装在“真空”的密封容器（又称真空灭弧室）内而制成的一种断路器。

3、六氟化硫断路器 六氟化硫断路器是选用具有优质绝缘功能和灭弧功能的六氟化硫气体作为灭弧介质的断路器。六氟化硫断路用具有灭弧功能强、不自燃、体积小等长处。

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