The rcd has three failure modes the reject - operation , the wrong - operation and the malfunction of handle . the reliability check should consider this characteristic and these failure modes . the success ratio r and the failure ratio a are applied as reliability criterion of rcd 首先，针对剩余电流动作保护器是不频繁动作的保护电器的工作特点以及发生拒动、误动故障及操作故障三类故障的失效模式，提出了采用保护成功率及和操作故障率作为可靠性特征量，并提出了可靠性特征量的估计方法。
Using this equipment , the residual current protection test and operation reliability test were be done . and the failure reason of rcd was analysed . the method to improved the reliabilty level of rcd was introduce . so the reliability study can be processed 应用剩余电流动作保护器可靠性试验设备进行了成功率验证试验和操作故障率可靠性验证试验，分析了剩余电流动作保护器的故障原因，提出了提高剩余电流动作保护器可靠性的方法，从而真正地将可靠性研究工作付诸实施。
According to the sample theory , applied the time terminated test plan , the reliability compliance test plan was brought forward . the reliability compliance test plan was divided into two parts , residual current protection test and operation reliability test . in this paper , the preparation of sample , the test plan , the failure criterion and the program of reliability test were introduced 本文由抽样理论，采用定时截尾试验方案确定了剩余电流动作保护器的可靠性验证试验方案，剩余电流动作保护器的可靠性验证试验由成功率验证试验和故障率验证试验组成；本文还给出了剩余电流动作保护器可靠性验证试验的试品准备和试验条件、试验检测方法、失效判据，以及可靠性验证程序。
