客车电气绝缘性能良好是保证列车正常供电和行车安全的重要环节。列车运行中剧烈的振动、冲击和相对运动经常会产生绝缘破损,出现接地、短路现象,蓄电池受潮也是绝缘性能下降的原因。由于绝缘不良或破坏,不仅造成漏电现象,还可能发展成元件烧坏、控制箱失控、短路起火等事故,影响供电和危及列车安全。 Passenger car electrical insulation is good to ensure the normal train power supply and traffic safety an important part. Train running violent vibration, impact and relative movement often produce insulation damage, there is a ground, short circuit, battery moisture is also a reason for the decline in insulation performance. Due to poor insulation or damage, not only cause leakage phenomenon, but also may develop into component burnout, control box runaway, short circuit and other accidents, affecting the power supply and endanger the safety of the train.