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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      點擊:
                      一般選用原則:
                      根據用途選擇斷路器的型式及極數。
                      根據最大工作電流選擇斷路器的額定電流。
                      根據需要選擇脫扣器的類型,附件的種類和規格。
                      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≥線路計算負載電流。
                      ③ 斷路器的額定短路通斷能力≥線路中可能出現的最大短路電流(一般按有效值計算)。
                      ④ 線路末端單相對地短路電流≥1.25倍斷路器瞬時(或短延時)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 斷路器的分勵脫扣器額定電壓等于控制電源電壓。
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