It adopts the digital code signal to control the gear changing and the states of the electric switch.
电子选发器采用数码信号控制换档和电子开关选通，从而克服了机械选发器的弊端。
A kind of human-machine interface of intelligent-controlled switch used to control low-voltage electric equipments in coal mines is introduced.
给出了一种用于控制井下低压电器的智能控制开关的人机接口的软硬件设计。
Presents the basic principle and function of the new generation of comprehensive electric protector, as well as the whole process control of HP electric motor switch-on with it.
介绍新一代综合保护器基本原理和功能，利用电气综合保护器，对高压电动机的启动实现全过程控制。
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