The utility model discloses a three station vacuum switch tube, which comprises a vacuum chamber, a static contact component, a moving contact component and a grounding contact, grounding contact including grounding contact ring and grounding contact ring and grounding terminals are electrically connected, the movable contact driven straight reciprocating motion in a static contact and a ground contact ring through the operating mechanism; when the movable contact and static contact and grounding contact ring are in the off state, the moving contact and the static contact resistance electric field strength was greater than the static contact and the movable contact or connected to the contact between the electric field intensity tolerance. The utility model in turn, isolation and grounding station three functions at the same time, not only has the advantages of compact structure, reasonable design, advanced technology, in accordance with the current standards, electrical life and mechanical long life, the advantages of wide application range, and once when the vacuum degree is reduced, the electrical breakdown occurs at the load terminal and the ground end, the leakage current and short-circuit current into the earth, that might reach the load end of personnel safety maintenance, high safety and reliability.
【技术实现步骤摘要】
本技术涉及一种工作电压为3. 6kV 40. 5kV的中压真空开关管,尤其是涉及一种三工位真空开关管。
技术介绍
参考国家标准GB 2900. 20《电工术语高压开关设备》的规定,断口是指机械式开关 的两个或两个以上导体,正常时使导电回路断开,操作时以其接触使导电回路接通的电气 距离。在高压开关
中,存在有以下三种断口隔离断口、熄弧断口和接地断口。其 中,隔离断口是用于与带电回路安全隔离的断口 在分位置时,隔离断口间有符合安全要求 的绝缘性能和断开标志;在合位置时,能承载正常以及异常(如短路)回路条件下的电流。 灭弧断口是用以断开或/和接通正常以及异常(如短路)回路条件下电流的断口,灭弧断 口间具有能限制电弧空间位置并加速电弧熄灭的装置。接地断口是用于将导电回路接地的 断口 在正常回路条件下是断开的;合闸时对地能释放回路上的静电荷以及承载异常回路 条件下的异常(如短路)电流。断口的绝缘介质有多种,主要有空气、油、六氟化硫和真空等。目前,在3.6kV 40. 5kV的中等电压领域中,熄弧断口已经实现了真空化,绝大数场合已采用真空灭弧管。而 隔离和接地断口的 ...
【技术保护点】
1.一种三工位真空开关管,由内部带密闭空腔的真空室以及安装在所述真空室内的静触头组件、动触头组件和接地触头(5)组成,所述真空室从上至下由上端盖(2)、上绝缘壳(3)、屏蔽筒(14)、下绝缘壳(6)和下端盖(8)依次连接组成;所述静触头组件包括静导电杆(1)和安装在静导电杆(1)前端部的静触头(4)且静触头(4)与静导电杆(1)电连接,所述动触头组件包括动导电杆(10)和安装在动导电杆(10)前端部的动触头(11)且动触头(11)与动导电杆(10)电连接,所述静导电杆(1)的后部安装在上端盖(2)上,所述动导电杆(10)上套装有导向套(9),动导电杆(10)通过套装在其上的 ...
【技术特征摘要】
【专利技术属性】
技术研发人员:王岩,王志超,王德杉,杨艳敏,达利科,
申请(专利权)人:西安森源开关技术研究所有限公司,
类型:实用新型
国别省市:87
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