摘要：【中文】本发明提出一种过压保护电路，用于保护铁道车辆产品的直流电源模块，包括输入滤波和浪涌保护模块、输入电压比较模块及电源回路切断模块；供电电源正极经所述输入滤波和浪涌保护模块与所述直流电源模块的正极连接，供电电源负极依次经所述输入滤波和浪涌保护模块及所述电源回路切断模块与所述直流电源模块的负极连接；所述输入滤波和浪涌保护模块的输出电压正负极经过分压后接入所述输入电压比较模块的输入端并与预设的参考电压做比较，所述输入电压比较模块的输出端与所述电源回路切断模块连接以根据比较结果控制所述电源回路切断模块的通断；其将直流电源模块的输入保护电压提升，提高了产品的可靠性及可用性，降低了维护成本。 【EN】The invention provides an overvoltage protection circuit, which is used for protecting a direct-current power supply module of a railway vehicle product and comprises an input filtering and surge protection module, an input voltage comparison module and a power supply circuit cutting-off module; the anode of the power supply is connected with the anode of the direct current power supply module through the input filtering and surge protection module, and the cathode of the power supply is connected with the cathode of the direct current power supply module through the input filtering and surge protection module and the power circuit cut-off module in sequence; the output voltage anode and cathode of the input filtering and surge protection module are connected to the input end of the input voltage comparison module after voltage division and are compared with a preset reference voltage, and the output end of the input voltage comparison module is connected with the power supply circuit cut-off module so as to control the on-off of the power supply circuit cut-off module according to a comparison result; the input protection voltage of the direct-current power supply module is improved, the reliability and the usability of the product are improved, and the maintenance cost is reduced.