摘要
开关设备作为线路的供电单元,各部分的温度不得超过允许值,作为真空开关及断路器的核心元件,真空灭弧室的温升性能主要取决于回路电阻大小。真空灭弧室的回路电阻主要由动静触头本身电阻值及接触电阻值组成。断路器合闸时,灭弧室动静触头接触,但表面仍然会存在间隙,间隙面以金属桥的形式导电形成接触电阻。不同的触头压力及接触面粗糙度不同时,动静触头的间隙也不同,从而影响真空灭弧室的回路电阻及其性能。本文通过对灭弧室不同触头压力及接触面不同粗糙度时灭弧室动静导电杆温升的研究,分析触头压力及触头接触面粗糙度对灭弧室温升的影响,得到不同触头压力及触头表面粗糙度下温升变化趋势,为真空灭弧室设计中触头材料及表面粗糙度的选择、形状的设计提供理论基础。
As an important unit of power supply, each part of the switchgear must not exceed the allowable temperature.The performance of vacuum interrupter, a core component of vacuum switch and circuit breaker, under a rising temperature mainly depends on the circuit resistance.In this work, we investigate the temperature rise of static and dynamic conductor rods in arc extinguishing chamber under different contact pressure and different roughness of contact surface.The influence of contact pressure and roughness of contact surface on temperature rise of arc extinguishing chamber is analyzed.The change trend of temperature rise under different contact pressure and surface roughness of contact is obtained.This work is helpful to the choice of contact material and surface roughness and the design of shape in the design of vacuum arc extinguishing chamber.
作者
张敬涛
闫姿姿
于洪宇
王小焕
陈利民
桑永健
ZHANG Jingtao;YAN Zizi;YU Hongyu;WANG Xiaohuan;CHEN Limin;SANG Yongjian(Tianjin Ping Gao Intelligent Electric Co.,Ltd.,Tianjin 300300,China)
出处
《真空科学与技术学报》
CAS
CSCD
北大核心
2021年第4期348-351,共4页
Chinese Journal of Vacuum Science and Technology
关键词
真空灭弧室
触头压力
触头接触面粗糙度
Vacuum interrupter
Contact pressure
Contact surface roughness
