发送询价
主令开关主要用于闭合,断开控制线路,以发布命令或用作程序控制,实现对电力传动和生产机械的控制。因此,它是人机联系和对话所必不可少的一种元件。由于它专门发送命令或信号,故称为“主令电器”,也称“主令开关”。主要类型有按钮、位置开关,转换开关,主令控制器和其他主令开关,如接近开关、脚踏开关、十字开关、信号灯等。控制器用于改变主电路或励磁电路的接线,也可以改变接在电路中的电阻值,来控制电动机的启动与调速
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