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工控下載
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樓主  發(fā)表于: 2010-12-07 14:14
請教各位大俠，控制用變壓器，他的一次側，二次側是不是都要加空開(kāi)？原理是什么？還有若要控制該變壓器所在線(xiàn)路，那么接觸器是安在變壓器一次側還是二次側？原理何在？
mayanheng
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1樓  發(fā)表于: 2010-12-07 16:58
一次側空開(kāi)的作用是：一旦變壓器有問(wèn)題，它保護上一級電器設備。

二次側空開(kāi)的作用是：一旦下邊的接觸器有問(wèn)題（短路），它保護變壓器

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