本电源系列是铁路信号电源屏给25Hz相敏轨道电路专用供电模块。它利用电力电子技术将50Hz交流电转换成符合要求的25Hz电源。该模块应用了先进的有源功率因数校正技术（APFC）使功率因数高达0.99，有效降低了谐波成份，减少了无功损耗，使整机的满载效率达到90%以上。按功率分为2K、4K、6K、8K、10K等多种。

   This power supply series is used in the railway signal power supply panel that provides power to 25Hz phase sensitive track circuit. It uses power electronics technology to convert 50Hz AC to 25Hz power supply to meet the requirements. The module uses the advanced Active Power Factor Correction (APFC) technology to raise the power factor up to over 0.99, effectively reducing the harmonic wave and the reactive power loss, and making the full load efficiency of the machine more than 90%. It is categorized into 2K, 4K, 6K, 8K, and 10K by power.