40.5 kV充气柜真空断路器合闸弹跳故障分析及解决方法  

Analysis and Solution of the Vacuum Circuit Breaker Closing Bounce Fault in a 40.5 kV Inflatable Cabinet

作　　者：李猛 赵莹 牛英凯 LI Meng;ZHAO Ying;NIU Ying-kai(XJ Electric Co.,Ltd,Xuchang 461000,China)

机构地区：[1]许继电气股份有限公司,河南许昌461000

出　　处：《电工电气》2023年第10期49-52,71,共5页Electrotechnics Electric

摘　　要：在真空断路器合闸过程中,弹跳时间过长会引起触头熔焊,导致用电事故的发生。对40.5 kV充气柜真空断路器的合闸弹跳产生机理进行分析,找到了真空断路器合闸弹跳的影响因素,通过增加储能弹簧初始压力、降低灭弧室动端质量、设计动端导向及静端缓冲装置等方法有效降低断路器合闸弹跳,并将优化后的真空断路器弹跳特性控制到2 ms以内,满足了标准要求,提高了设备使用的安全性与可靠性。During the process of vacuum circuit breaker closing,the long bouncing time causes contact welding,resulting in electrical accidents.After analyzing the mechanism of vacuum circuit breaker closing bounce in a 40.5 kV inflatable cabinet,the paper finds out the factors that affects closing bounce of vacuum circuit breakers.Through increasing initial pressure of the energy storage spring,reducing the moving end mass of the arc extinguishing chamber and designing the moving end guide and the static end buffer device,the closing bounce of circuit breakers is effectively decreased.Then,the bouncing characteristic of the optimized vacuum circuit breaker is controlled within 2 ms to meet the standard requirements,improving the safety and reliability of the equipment.

关 键 词：断路器 合闸弹跳 阻尼 操动机构 储能弹簧 

分 类 号：TM561.2[电气工程—电器]