轨道电路匹配盒内断路器异常跳脱解决方案

Solution to Abnormal Jumping off Breaker in Matching Box of Track Circuit

为了解决雷电导致电气化区段轨道电路轨旁匹配盒内断路器异常跳脱故障,对雷电入侵方式、危害原理进行了分析,提出了在匹配盒旁设置监测型防护盒的解决方案。试验证明,监测型防护盒能耐受100kA (8/20μs波形)而不异常跳脱,有效提高了匹配盒抗雷电干扰能力。

To solve abnormal jumping off of the circuit breaker in the matching box of track cir cuit within electrified section due to lightning, the intrusion mode of lightning and damage pro-tection principle are analyzed and a monitoring protective box beside the matching box is proposed to be set up to replace the circuit breaker and surge protector in existing matching box. It has been proved that the monitoring protective box could withstand 100kA （8/20/μs waveform） with-out abnormal jumping off, which effectively improves the lightning-proof and anti-interference capability of the matching box.