【摘要】 介绍利用扩展卡PCL727将电动机保护器各项保护所需的输入量进行模拟输出,控制数字电位器MAX5452模拟热敏电阻与漏地电阻,并采用VB软件编程实现对保护器的短路、过载、断相、过压、三相不平衡、漏电、漏地电阻等保护功能进行测试。实验结果表明系统测试方法可行,并能保存测量后保护器的性能资料。更多还原

【Abstract】 The outputs of PCL727 card D/A use in input of motor protector and the digital potentiometer MAX5452 use in thermal resister and ground leakage resistance in testing system.The performance tests are realized by program based on VB,it includes short-circuit,overload,over-voltage,under voltage loss of phase,three phase unbalance,leakage,ground-leakage protection performance and so on.The result of test indicates it is a feasible method.It also can keep records of test.更多还原