跳闸位置触点动作异常现象的分析

Analysis of abnormal operating performance of tripping state contact

在一次故障分析中发现保护装置记录的跳闸位置触点动作异常,检修人员对回路和单个装置检查并没有发现问题,在模拟故障的综合状况下,重现了故障时现象,发现是由于位置回路中串连了弹簧机构断路器某辅助触点,而该触点在断路器重合闸的第二个储能阶段动作滞后。文章最后提出了应用此类断路器触点时的注意事项,以及对预试定检方法的建议。

An abnormal operating performance of breaker＇s tripping state contact is detected in analysis of fault records. Relaying engineer checked the circuits and single protection sets, and no problem was found. But this abnormal phenomenon was recurred at the integrated simulation of fault condition. Finally the reason causing this abnormal performance is affirmed, which is that a accessorial contact of the breaker with spring structure is joined in series in the circuit and this contact will lag during the second energy storing moment. Points for attention about this type of breaker and some advices about the checking of relaying sets are presented.