电子过流脱扣器计算机辅助测试系统

A COMPUTER-AID TEST SYSTEM FOR AN OVERCURRENT ELECTRONIC TRIP RELAY

本文介绍一种用于电子过流脱扣器特性测试的计算机辅助测试系统。该系统采用微机控制ＳＰＷＭ晶体管变频电源产生交流试验电流，采用微机测量电流的大小及脱扣器的动作时间，整个系统采用二级分布的微机控制方式，下位机采用ＳＴＤ总线工控机，上位机采用ＰＣ系列通用微机。两年来的实际运行表明，该系统具有测量结果准确、自动化程度高、抗干扰能力强、运行稳定的优点。

A computer-aid test system for an overcurrent electronic trip relay is presented. The test current is generated by a voltage source GTR inverter controlled by amicrocomputer.The trip current and trip time are both measured by a STD-BUScomputer.A two-stage distributed computer system is formed of the STD-BUS computer(the lower)and a PC series computer(the upper).The system has been put into practical use successfully.