Abstract: Based on the past failure cases of quick-acting contact groups in switching machines of Suzhou Rail Transit, this paper analyses the causes of various types of contact failures, and puts forward corresponding technical improvement measures and their application according to the actual situation in the field, in order to reduce the failure rates of quick-acting contact groups and improve the operation efficiency.

Key words: switch machine, TS-1 contact group, Saltburg contact group, SRT6 contact group

摘要： 从苏州轨道交通以往发生的转辙机内速动接点组故障案例出发，对各类型接点故障原因进行分析，并结合现场实际情况有针对性地提出相应的技改措施并加以应用，以达到降低速动接点组故障率，提高运营行车效率的目的。

关键词: 转辙机, TS-1接点组, 沙尔特堡接点组, SRT6接点组