真空断路器过流保护及其在线监测系统研制

Development of Over-Current Protecting and Its On-Line Monitoring System for Vacuum Circuit-Breaker

研发了一套适用于真空断路器的可实现过流保护及其在线监测功能的系统。系统采用一种改进的过流继电保护实现方法,并通过监测过流脱扣线圈电流特性、断路器断口状态、分闸时间,实现了真空断路器过流继电保护操动机构机械状态的在线监测,为评估真空断路器的运行状态提供了依据,具有较好的应用前景。

An over-current protecting and its on-line monitoring system for vacuum circuit-breaker was developed. The system adopted a new way to achieve over-current protection and to realize online monitoring the operation mechanism of vacuum circuit-breaker＇s over-current protection according to characteristics of over-current trip coil,state of circuit-breaker＇s breaking and breaking time,which provided evidences for evaluation and diagnose of the circuit-breaker＇s condition. Therefore the system is of great application prospect.