摘要
本文介绍的大电流热保护器参数自动测量系统,其控制系统以PLC为核心,配备触摸屏、微型打印机等。系统采用恒流电子负载提供稳定的大电流(100A),利用霍尔元件检测电流的有无,精确记录热保护器断开或闭合的时间;同时可测试其绝缘电阻是否合格,对于热保护器动作时产生抖动(振颤)的情况亦可进行检测。该系统具备多参数的测试功能,测试精度高,操作简便,并提供数据统计、打印和产品分选等功能,提高了工作效率。
The testing system for parameters of high-current Thermoprotector uses PLC as its core ,equipped with Touch display screen and micro-printer. It also employs constant-current electronic load to supply constant high-current（lOOA）,and utilizes Hall element to convert current signal to voltage signal feedbacked to PLC, which record the trip time or recovery time of thermopretector .It can test whether the thermoprotector＇s insulation resistance is qualified ,while the chattering can be detected. The system can test several parameters accurately and simply, and provide the function of data statistics , print and product sorting which enhance the work efficiency.
出处
《微计算机信息》
北大核心
2008年第19期140-142,共3页
Control & Automation
关键词
大电流保护器
恒流电子负载
断开时间
high-current thermoprotector
constant-current electronic load
trip time
