HX_(D)2B型机车隔离接触器故障原因分析及解决方案

Cause analysis and solutions of isolation contactor fault in HX D2B locomotive

HX_(D)2B型机车隔离接触器用于四象限变流器主回路输入端与主变压器的次边牵引绕组分/合的控制。当隔离接触器发生卡滞,机车运行中无法正常断开主牵引变流回路,会引发主断隔离故障,对因隔离接触器导致的主断隔离故障原因进行分析,并提出整治措施,现场验证效果良好。

The HX_(D)2B locomotive isolation contactor is used for controlling the open/elose of the main circuit input of the four-quadrant inverter and the secondary traction winding of the main transformer.W hen the isolation contactor gets stuck and the locomotive is unable to disconnect the main traction converter circuit normally during operation,which will cause a main cireuit isolation fault.We analyzed the causes of the.main eircuit isolation fault caused by the isolation contactor,and proposed the corrective measures,which have good effect by on-site verification.