main supply switch的意思|示意

This device use the principle of additional DC power supply in main feeding switch, and use the principle of direction of zero sequence power in branch feeding switch.

该装置在总馈电开关处的漏电保护装置使用附加直流电源原理，在分支馈电开关处的漏电保护装置使用零序功率方向式保护原理。

The WATSN series automatic transferring switch of power supply (ATS) and its structure features as well as main specifications were introduced, especially the operating principle of the controller.

系统地介绍了施耐德万高公司生产的WATSN系列自动转换开关（ATS）的结构及特点、性能指标及主要技术参数等，并着重阐述了其控制器的工作原理。

To satisfy demand for uninterrupted power supply, the developing scheme of double power switch controller taking M68HC908SR12 controller as main control chip was introduced.

针对不间断供电的需求，介绍了一种以m 68hc 908sr12单片机为主控芯片的双电源转换控制器的研制方案。