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        上海人民電氣有限公司介紹斷路器的選型

        2021/1/5 17:10:56      點(diǎn)擊:
        一般選用原則:
        根據(jù)用途選擇斷路器的型式及極數(shù)。
        根據(jù)最大工作電流選擇斷路器的額定電流。
        根據(jù)需要選擇脫扣器的類(lèi)型,附件的種類(lèi)和規(guī)格。
        具體要求是:
        ① 斷路器的額定工作電壓≥線路額定電壓。
        ② 斷路器的額定短路通斷能力≥線路計(jì)算負(fù)載電流。
        ③ 斷路器的額定短路通斷能力≥線路中可能出現(xiàn)的最大短路電流(一般按有效值計(jì)算)。
        ④ 線路末端單相對(duì)地短路電流≥1.25倍斷路器瞬時(shí)(或短延時(shí))脫扣整定電流。
        ⑤ 斷路器欠壓脫扣器額定電壓等于線路額定電壓。
        ⑥ 斷路器的分勵(lì)脫扣器額定電壓等于控制電源電壓。
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