一种新颖的万能式断路器短路短延时动作可返回试验方式

A Novel Test Method of Circuit Breaking Short Time-Delay Operation Returning for Air Circuit Breakers

提出了一种万能式断路器短延时动作可返回试验方法。在多磁路变压器一次侧接入一个可调阻抗和一个机电式投切开关(如接触器),通过程序控制器控制投切开关的闭合与断开时间,实现了二次侧电流从万安级短时间通电后返回至千安级。

This article proposed a returnable test method of short time-delay operation for air circuit breaker. By connecting an adjustable impedance and an electromechanical change-over switch （ e. g. an contactor ） to the first winding of the multi magnetic circuit transformer, by controlling the closing time and the opening time of electromeehanical change-over switch with a process control device, the current of the secondary winding can drop from 5 digits ampere value to 4 digits ampere value after making for a short time.