CR400BF型动车组变压器入口电流保护故障分析

Fault Analysis of Transformer Inlet Current Protection for CR400BF EMU

CR400BF型动车组运行过程中多次报出变压器入口电流保护故障,影响列车运行。为了分析故障原因,本文介绍了CR400BF型动车组高压系统主电路拓扑结构及过流保护控制方式,并在分析过流保护故障逻辑的基础上,详细描述了故障分析方法及解决过程。

Transformer inlet current protection faults were reported many times in the operation process of the CR400BF EMU,which affected the train operation.In order to analyze the cause of the fault,this paper introduces the main circuit topology of CR400BF EMU high-voltage system and the control mode of over current protection.Then the fault analysis method and the process of solving are described in detail on the basis of analyzing the fault logic of over current protection.