电气化铁路信号电源自动切换系统设计

Design of Electrified Railway Signal Power Supply System Automatic Switching System

分析了铁路信号供电变压器缺相故障情况,设计了铁路信号电源自动切断系统,该系统以低压侧三相相电压为取样信号,由电压变换电路、比较电路、继电器控制电路及交流接触器构成。结果表明,信号电源缺相故障时,该系统可以有效地切断电源主回路,从而实现主备用电源之间的转换。

This paper analyzes the phase lack failure conditions of railway signal transformer, and designs the automatic cut off system of railway signal power supply. To the phase voltage of the low pressure side as sampling signal, this system is composed of voltage transform circuit, comparative circuit, relay control circuit and ac contactor. The results show that the system can effectively shut off power supply, so as to realize the conversion between the main power supply and backup power supply.