點擊圖片查看大圖PSM-EG-RS232/TTY-P/2K現(xiàn)貨
雅特生科技產(chǎn)品經(jīng)理 Qianqian Shao 表示：「由于雅特生科技的ControlSafe小型車載平
臺外型極為小巧，因此集成商可以輕易克服安裝空間極為有限的問題。這個平臺采用模塊
式的設(shè)計，具有高度的靈活性，讓集成商可以保障目前已投輸入/輸出模塊上的
，因為將來他們進行換代更新時可以只將的"核心組件"升級。 」
長延時過電流脫扣器整定電流應(yīng)大于線路中計算電流
（4-10-9）
式中 ——過電流脫扣器的長延時動作整定電
流值，A；
——可靠系數(shù)，一般取1.1；
——線路的計算電流，單臺電動機是指
電動機的額定電流，A。
10.5 低壓斷路器
校驗一：長延時過電流脫扣器在配電線路過載時的可靠性。如對電動機進行保護，則電動機在過載 20％時應(yīng)使保護裝置動作；
校驗二：在配電線路出現(xiàn)尖峰負荷時或在電動機起動時，長延時過電流脫扣器不誤動。脫扣器在3倍整定電流值下的可返回時間，取決于線路中尖峰電流的持續(xù)時間，也就是線路中大容量的異步電動機直接起動的持續(xù)時間。
一般情況下，電動機的輕載起動時間不超過2.5～4s，電動機滿載起動時間不超過6～8s，個別電動機重載起動時間達15s。返回時間越小，說明線路電流大于長延時脫扣器整定電流值的倍數(shù)越高，保護裝置的動作越快。
10.5 低壓斷路器
（5）分斷能力
1）斷路器額定短路分斷能力應(yīng)大于線路中大短路電流。
2）斷路器的額定極限短路分斷能力應(yīng)大于斷路器額定運行短路分斷能力（對于直流電流線路，兩者的數(shù)值相同）。分斷能力是指低壓斷路器在規(guī)定的試驗（如電壓、頻率、線路其它參數(shù)等）條件下，能夠接通成切斷短路電流的數(shù)值。分斷
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