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scw威偉
互幫互助，共建美好社會(huì )。給他人方便就等于方便了自己。
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樓主  發(fā)表于: 2011-07-05 22:49
我用接觸器接220V電熱管Y型接法，ABC每一相上接4根管子，如果A相上壞了2根管子，或A相4根全壞了，會(huì )出現什么情況呢，會(huì )不會(huì )因為三相不平衡而產(chǎn)生電氣火災��？？？
困難像彈簧，你強它就弱，你弱它就強！
jetfondy
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1樓  發(fā)表于: 2011-07-06 15:02
加裝漏電斷路器是必須的，因為當電熱管的電熱絲將壞的時(shí)候，會(huì )變形容易靠到電熱管的外殼，這樣會(huì )造成加熱器外殼帶電，但是電熱管會(huì )正常工作，這樣會(huì )帶來(lái)人身安全的問(wèn)題！中線(xiàn)接零也是必須的，零線(xiàn)接到三相四線(xiàn)漏電斷路器的零線(xiàn)即可。

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