智能剩余电流保护器校测仪设计

在剩余电流保护器设计、生产和维护过程中,全面测试其性能是完善设计性能、提高产品可靠性的重要环节.本文讨论了以单片机为控制器用于剩余电流保护器的分断特性、指标及参数测试和校验的剩余电流保护器校测仪的硬、软件设计,给出了剩余电流保护开关性能的测试方法及主要电路的设计和软件控制流程.该测试仪模拟正常的工作环境和特殊的恶劣工作环境,提供测试用的各种电压,产生大小、相位、波形可控的剩余电流.由单片机控制高精度A/D变换器完成电量参数的测量和剩余电流保护器分断时间的测量,测量数据最终送LCD显示,从而完成对剩余电流保护器性能的测试.经使用证明,该仪器可以测试校验各种类型的剩余电流保护器,可满足现场实验的要求.

Design of the test instrument for the residual current protector

It is important to comprehensively test the performance of the residual current protector for consummating the design and improving the produce reliability in its design,producing and maintenance.This article narrates the hardware and software design of the test instrument which taking the microcontroller as the controller for the residual current protector.A method for testing breaking characteristic,index and parameter is presented.It proposes the method to test the performance of the residual current protector switch and the main circuit design realization and the software control flow.This test instrument provides many types of voltage and residual current whose amplitude,phase and wave are controllable by simulating normal working conditions and special bad working conditions.The electric parameter and the breaking time of residual current protector are sampled by the high accuracy A/D converter controlled by the microcontroller,all results can be displayed in LCD,and thus the intelligent control is achieved.The practice indicates that the instrument can test and verify many types of residual current protector,operates easily,will satisfy the request in field test.