1746-OB32 PLC輸出模塊

所在地: 福建省 廈門市
發布時間: 2025-02-19
詳細信息

1746-OB32

手車和抽屜分別是高壓開關櫃和低壓開關櫃的一部分,分別安裝高壓斷路器和低壓斷路器及其繼電器等元器件。由此劃分出手車式開關櫃(高壓)和抽屜式開關櫃(低壓),他們與固定式開關櫃的功能是基本相同的,主要區別是方便了維護和檢修(手車和抽屜都可以通過機械操作機構搖把來推進、拉出)。手車和抽屜一般都有工作(正常運行時)、試驗(試投運和現場試驗時)和退出(維護、檢修時)三種位置狀態。

接地刀(也叫接地開關)主要:一是用來在線路和設備檢修時,為確保人員進行接地用的;二是可以用來人為地造成係統的接地短路,達到控制保護的目的。第一個作用很好理解,不做介紹。第二個作用是這樣的:接地刀通常是接在降壓變壓器的高壓側,當受電端發生故障或者變壓器內部故障時,接地刀開關應自動閉合,造成接地短路故障,迫使送電端(上端)斷路器迅速動作,切斷故障,所以說這是個人為的接地短路故障,目的就是保證送電端的斷路器能夠快速動作。


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