分布电容影响交流继电器成因分析及解决方案

Analysis and Solution of Cause of Distributed Capacitance on AC Relay

针对仪表自控设备及回路调试中,长距离电缆导线分布电容引起交流继电器不能正常释放,从而导致设备误动作、拒动作的情况,通过计算导线分布电容和电阻,分析继电器参数、电路模型并进行仿真验证,采用在继电器上并联电阻和电容的方案解决了上述问题,并成功应用于工程实践中。

In the debugging of automatic equipment and instrument loop,the distributed capacitance of long-distance cable leads to the abnormal de-energization of AC relay,which leads to equipment mis-operation and malfunction.Through calculating the circuit distributed capacitance and resistance,analyzing the relay parameters and loop model,carrying out simulation and verification,the problem is finally solved by the method of parallel resistance and capacitance.The method has been successfully applied in engineering practice.