Abstract: In order to diagnose the fault range of the five-wire switch control circuit, this paper proposes an intelligent diagnosis and analysis method for the faults of the five-wire switch control circuit of the switch machine. On the basis of an introduction to the methods for the voltage parameter acquisition of the five-wire switch and the key relay state acquisition of the control circuit, and in view of the relay operation logic, fault diagnosis is carried out for the energizing circuit of the relay and open circuit of control circuit.The fault diagnosis and analysis of the circuit is conducted by using the switch indication voltage. The fault range is determined by monitoring the voltage at the distribution board. The detailed diagnosis process is explained by using the example of switch normal position. Multiple experiments conducted at the training base of Nanning Metro Line 4 have shown that the proposed analysis method can accurately diagnose the causes and range of faults in the five-wire switch control circuit. When a circuit fault occurs, it can assist maintenance personnel to quickly locate the fault point and complete the fault handling.

Key words: AC switch machine, fault diagnosis, control circuit, five-wire turnout

摘要： 为诊断五线制道岔控制电路故障范围，提出一种转辙机五线制道岔控制电路故障智能诊断分析方法，介绍五线制道岔电压参数采集、控制电路关键继电器状态采集方法，结合继电器动作逻辑，诊断继电器励磁电路及控制电路开路故障，采用表示电压对电路进行故障诊断分析，通过在分线盘处监测的电压判断故障范围，以道岔定位为例阐述诊断的详细过程。在南宁地铁4号线培训基地开展多次实验结果表明，该方法可以准确诊断出五线制道岔控制电路故障的原因及范围，在发生电路故障时，可以辅助维护人员快速定位故障点，完成故障处理。

关键词: 交流转辙机, 故障诊断, 控制电路, 五线制道岔