首先对快切装置的工作原理进行概述，从快速同期切换、同期捕捉切换、残压切换以及长延时切换四个方面入手，对快切装置基本类型进行解析，并以此为依据，提出快速切换装置在多电源供电系统中的应用对策，探究目的在于实现提升多电源供电系统运行效率的同时，助力企业长远发展。

Firstly, the working principle of fast-switching device is summarized. From four aspects of fast synchronous switching, synchronous capture switching, residual voltage switching and long-delay switching, the basic types of fast-switching device are analyzed. On this basis, the application countermeasures of fast-switching device in multi-power supply system are put forward. The purpose of the research is to improve the operation efficiency of multi-power supply system and to help enterprises develop in the long run.