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          接觸器如何選型上海人民電器廠概述

          2021/1/13 15:14:01      點擊:

          接觸器如何選型

          1、類型的選擇:

          交流電動機采用交流接觸器。

          直流負載采用直流接觸器;當直流負載比較小時,也可選用交流接觸器,但觸頭的額定電流應大些。

          2、主觸頭額定電壓的選擇:

          接觸器主觸頭的額定電壓應大于或等于負載回路的額定電壓。

          3、主觸頭額定電流的選擇

          接觸器主觸頭的額定電流應等于電阻性負載的工作電流。若是電感性負載,則主觸頭的額定電流應大于電動機等電感性負載的額定電流。

          4、吸引線圈電壓的選擇:

          交流線圈:36V、110V、127V、220V、380V;

          直流線圈:24V、48V、110V、220V、440V。

          一般交流負載用交流線圈,直流負載用直流線圈,但交流負載頻繁動作時,可采用直流線圈的接觸器。

          5、觸頭數量及觸頭類型的選擇:

          通常接觸器的觸頭數量應滿足控制支路的要求,觸頭類型應滿足控制線路的功能要求。

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