<bdo id="2fwpw"></bdo><noframes id="2fwpw"><delect id="2fwpw"></delect><delect id="2fwpw"></delect><noframes id="2fwpw"><rt id="2fwpw"></rt><bdo id="2fwpw"></bdo><delect id="2fwpw"></delect><delect id="2fwpw"><bdo id="2fwpw"></bdo></delect><noframes id="2fwpw"><noframes id="2fwpw"><delect id="2fwpw"><delect id="2fwpw"></delect></delect><rt id="2fwpw"></rt><delect id="2fwpw"></delect><delect id="2fwpw"></delect><bdo id="2fwpw"></bdo><bdo id="2fwpw"></bdo> <bdo id="2fwpw"><rt id="2fwpw"></rt></bdo><noframes id="2fwpw"><bdo id="2fwpw"></bdo><bdo id="2fwpw"></bdo><delect id="2fwpw"><rt id="2fwpw"></rt></delect><rt id="2fwpw"><rt id="2fwpw"></rt></rt><bdo id="2fwpw"><bdo id="2fwpw"></bdo></bdo><rt id="2fwpw"></rt><delect id="2fwpw"></delect><noframes id="2fwpw"><rt id="2fwpw"></rt><rt id="2fwpw"></rt><rt id="2fwpw"></rt><rt id="2fwpw"></rt><delect id="2fwpw"><noframes id="2fwpw"><noframes id="2fwpw"> <delect id="2fwpw"></delect><delect id="2fwpw"></delect><noframes id="2fwpw"><delect id="2fwpw"></delect><bdo id="2fwpw"></bdo><noframes id="2fwpw"><noframes id="2fwpw">
圓家人控工
請叫我伏特
級別: 略有小成
精華主題: 0
發(fā)帖數量: 221 個(gè)
工控威望: 381 點(diǎn)
下載積分: 1021 分
在線(xiàn)時(shí)間: 126(小時(shí))
注冊時(shí)間: 2011-05-26
最后登錄: 2014-02-16
查看圓家人控工的 主題 / 回貼
樓主  發(fā)表于: 2011-06-26 18:39
如題，最好幫忙解釋下計算依據，還有需要什么保護，就裝一個(gè)斷路器就夠了嗎，有幾個(gè)大直流電機和N多小交流電機，還有一些電熱絲，就這些負載
付明明
級別: *
精華主題: * 篇
發(fā)帖數量: * 個(gè)
工控威望: * 點(diǎn)
下載積分: * 分
在線(xiàn)時(shí)間: (小時(shí))
注冊時(shí)間: *
最后登錄: *
查看付明明的 主題 / 回貼
1樓  發(fā)表于: 2011-06-30 22:53
嗯 ,29樓,說(shuō)的不錯,  我算出來(lái)的是要用721平方  樓上說(shuō)用800 也錯不到那去,算出來(lái)了讓他大一點(diǎn)最好,但是不要大的太多了,人家都會(huì )說(shuō)人浪費了,  我的算法是,你有多大的功率,就X1.732 在除3 這是每根線(xiàn)的電流,          在這我給你講解一下,     上面的1.732是這因數, 這個(gè)數只能算380的電壓  除以三是因為剛算出來(lái)的是三相的總電流,  一除就出來(lái)一根線(xiàn)的電流了,  

国产精品碰碰现在自|超碰香蕉人人网99精品|人妻无码一区二区19p|久久久噜噜噜久久中文字幕|亚洲va中文字幕无码
<bdo id="2fwpw"></bdo><noframes id="2fwpw"><delect id="2fwpw"></delect><delect id="2fwpw"></delect><noframes id="2fwpw"><rt id="2fwpw"></rt><bdo id="2fwpw"></bdo><delect id="2fwpw"></delect><delect id="2fwpw"><bdo id="2fwpw"></bdo></delect><noframes id="2fwpw"><noframes id="2fwpw"><delect id="2fwpw"><delect id="2fwpw"></delect></delect><rt id="2fwpw"></rt><delect id="2fwpw"></delect><delect id="2fwpw"></delect><bdo id="2fwpw"></bdo><bdo id="2fwpw"></bdo> <bdo id="2fwpw"><rt id="2fwpw"></rt></bdo><noframes id="2fwpw"><bdo id="2fwpw"></bdo><bdo id="2fwpw"></bdo><delect id="2fwpw"><rt id="2fwpw"></rt></delect><rt id="2fwpw"><rt id="2fwpw"></rt></rt><bdo id="2fwpw"><bdo id="2fwpw"></bdo></bdo><rt id="2fwpw"></rt><delect id="2fwpw"></delect><noframes id="2fwpw"><rt id="2fwpw"></rt><rt id="2fwpw"></rt><rt id="2fwpw"></rt><rt id="2fwpw"></rt><delect id="2fwpw"><noframes id="2fwpw"><noframes id="2fwpw"> <delect id="2fwpw"></delect><delect id="2fwpw"></delect><noframes id="2fwpw"><delect id="2fwpw"></delect><bdo id="2fwpw"></bdo><noframes id="2fwpw"><noframes id="2fwpw">