主、备电源自动切换系统的设计与实现

广播电视发射台站属于重要电力负荷用户，原有的单路电源供电方式具有较大的安全隐患，不能满足发射台站信号正常播出的要求。文章结合低压配电系统改造的实例，阐述了双电源自动切换系统的工作方式、控制功能和工作原理。完成设计后的工作实践证明：主、备电源自动切换的双路供电方式达到了向重要电力用户供电的功能，具有较好的应用和推广价值。

Design and Realization of Main-Backup Power Automatic Transfer System

Launch pad of radio and television stations belongs to the important power load custom.The original single-channel power supply system worked with a greater security risk,and could not meet the requirements of normal broadcast transmitting station signal.In this paper, an instance of the transformation of the low voltage distribution systems on a dual power automatic switching system works to control the functions and working principle. Practice has proved that after the completion of the design： Dual power method of Maln-Backup Power Automatic Transfer System achieves functional of electricity users, with a good application and promotion of value.