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突破手牛爺爺
寒風(fēng)知我相思意，可燃她心可燃冰。
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樓主  發(fā)表于: 2024-07-02 10:04
圖片：
最近在畫(huà)電路圖了，遇到個(gè)問(wèn)題就是不知道那個(gè)互感器的電流比怎么算，具體問(wèn)題就是如何根據開(kāi)關(guān)上標注的額定電流來(lái)計算互感器的電流比。在網(wǎng)上看到個(gè)回答是說(shuō)用1A或者5a的二次電流去除以一次電流，然后一般選擇空開(kāi)有個(gè)1.2-1.5的系數，所以可以知道我這個(gè)圖上630A的空開(kāi)的電流最大的630/1.5=420A左右，取個(gè)整數400吧，然后就能得出我這個(gè)圖上的要裝的互感器的電流比是400/5,不知道我這樣推理對不對，希望大佬解答一下，先提前謝謝各位大佬啦！
yuqing
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1樓  發(fā)表于: 2024-07-02 14:48
選800/5A
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