150-F60NBR現貨
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茍縱心于物外,安知榮辱之所如。
供應進口PLC/DCS控制系統備件,歡迎來電咨詢! 愿您擁有美好的一~天!
4.峰值耐受電流反映了斷路器承受由于短路電流產生電動力的耐受性能,它決定斷路器的導電部分和絕緣支撐件的機械強度以及觸頭的結構形式。
5.操作性能
(1)全開斷時間 是指斷路器接到分閘命令瞬間起到電弧熄滅為止的時間間隔。即
(4-10-4)
式中 ——全開斷時間,s;
——分閘時間,s;從斷路器接到分閘命令瞬間到
所有相的觸頭都分離的時間間隔,亦稱為斷
路器固有分閘時間;
——燃弧時間,s;是指某一相首先起弧瞬間到所
有相電弧全部熄滅的時間間隔。
全開斷時間是說明斷
路器開斷過程快慢的主
要參數,它直接影響故
障對設備的損壞程度、
故障范圍、傳輸容量和
系統的穩定性。 斷路器開斷時間示意圖
(2)合閘時間 處于分閘位置的斷路器,從接
到合閘命令瞬間起到所有相的觸頭均接觸為止的
時間稱為合閘時間。
6.自動重合閘性能
自動重合閘的操作循環:分— —合分— —合分。 為斷路器開斷故障電路,從電弧熄滅起到電路重新接通的時間,稱為無電流間隔時間,一般為0.3s或0.5s; 為強送電時間,一般為180s。
斷路器開斷時間與無電流間隔時間之和稱為自動重合閘時間。
金屬短接時間系指斷路器重合閘操作后,觸頭閉合到第二次觸頭分開所需用的時間。
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150-F60NBR
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150-F60NBR
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