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zhangli019
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樓主  發(fā)表于: 2011-03-21 19:37
各位叔伯阿姨大媽大嬸，論壇的各位大俠！小弟請教了：

一臺300W的三相電機，380V供電。

本人選擇熱保護繼電器的時(shí)候用（300/380*1.732）*1.1=0.5A，采用整定電流為0.5A的熱保護繼電器。選用型號如下圖

如圖中倒數第二行，0.4--0.6A的熱保護繼電器，大家看可行嗎？如果有問(wèn)題，請大家告知計算方法，選型方法。感謝了�。�！
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etdssdabb
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1樓  發(fā)表于: 2011-03-25 09:32
按電機電流的0.95-1.05整定。供參考。

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