针对广州地铁三号线B2型车制动缓解检测环路工作原理，分析制动缓解检测环路异常断开时对列车牵引动车的影响，同时结合现场故障处理的经验以及对缓解检测环路电路设计的研究，发现了B2型车制动缓解检测环路在电路设计存在不足和缺陷，提出了对电路设计优化改进措施。%According to the working principle of B2 vehicle brake release detection loop of Guangzhou metro line 3, this paper analyzes the influence of brake release detection loop on abnormal train traction, combined with the experience of field fault treatment and the design of mitigation detection loop circuit, the shortcomings and defects in the circuit design of B2 vehicle brake release detection loop are found out, and the improvement measures of circuit design optimization are put forward.
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