一起杂物电梯接触器故障案例的分析

Analysis of a Fault Case of Service Lift Contactor

根据一起杂物电梯的检验案例中的故障现象，初步判断故障原因为运行接触器控制问题。通过对电气原理图深八分析，确定PLC延时控制运行接触器和方向接触器是故障的根本原因。最后提出了简单有效的改进方案。

According to fault phenomena of a service lift test case, the cause of failure is initially determined running contactor control problems. Through in-depth analysis of the electrical schematic diagram, the PLC delay control running contactor and contactor is determined the root cause of the fault. Finally, a simple and effective improvement scheme is proposed.