主令開關(guān)是指按照預定程序轉(zhuǎn)換控制電路接線的主令電器，用作控制接觸器、繼電器線圈及其它控制電路的各種非自動轉(zhuǎn)換裝置及磁力主令元件，由運行人員直接操縱，發(fā)出命令脈沖，作用到其它機構(gòu)，以開動或停止機組，改變設備的運行狀態(tài)（跳閘或合閘）的開關(guān)。常用主令開關(guān)有兩種：按鈕開關(guān)和控制開關(guān)。
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