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lhs64987572
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樓主  發(fā)表于: 2009-08-04 17:07
今天用了一個(gè)LS的斷路器，額定電流為30A，當一位電工將其用在48A的加熱管上面，整整過(guò)了7分鐘，斷路器不跳閘，直到將2.5平電線(xiàn)熔化相線(xiàn)短路才跳閘，想請教1、為什么超過(guò)30A的電流在那么長(cháng)的時(shí)間多不保護，2、請問(wèn)超過(guò)多少額定電流，多少時(shí)間跳閘其關(guān)系如何？？？3、以上事件正常么？還是LS質(zhì)量不行？
jingqianshan
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1樓  發(fā)表于: 2009-08-05 12:11
斷路器常規配置，過(guò)載長(cháng)延時(shí)保護IR1+短路短時(shí)間延時(shí)保護IR2+短路瞬時(shí)保護IR3.
你的線(xiàn)太細了，48A最少要10的線(xiàn)，要不然會(huì )先燒線(xiàn)再跳斷路器的。吃飯了，先說(shuō)這么多
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