ABB組單元模塊fi840f

所在地: 福建省 廈門市
發布時間: 2025-04-22
詳細信息

ABB組單元模塊fi840f使用熱繼電器對電動機進行過載保護時,將熱元件與電動機的定子繞組串聯,將熱繼電器的常閉觸頭串聯在交流接觸器的電磁線圈的控制電路中,並調節整定電流調節旋鈕,使人字形撥桿與推桿相距一適當距離。當電動機正常工作時,通過熱元件的電流即為電動機的額定電流,熱元件發熱,雙金屬片受熱後彎曲,使推桿剛好與人字形撥桿接觸,而又不能推動人字形撥桿。常閉觸頭處於閉合狀態,交流接觸器保持吸合,電動機正常運行。 


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