CRH 380BL动车组轴温传感器烧损是导致车组晚点的一个多发故障,本文简要介绍了动车组的接地设计概念,分析了其车体和轨道之间存在的电势差,并分析了传感器原理和探头内部结构,探讨了传感器探头内部击穿烧损的可能性。最后根据实际测量结果,提出了改善措施,实际运行效果良好。 CRH 380BL EMU shaft temperature sensor burnout is a multi-failure that causes the train to be late. This article briefly introduces the concept of grounding design for EMU, analyzes the potential difference existing between the body and the rail, and analyzes the principle of the sensor and the probe The internal structure of the sensor probe probing the possibility of breakdown breakdown. Finally, according to the actual measurement results, put forward the improvement measures, the actual operation effect is good.