<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">
xxj040202
級別: 探索解密
精華主題: 0
發(fā)帖數量: 93 個(gè)
工控威望: 192 點(diǎn)
下載積分: 784 分
在線(xiàn)時(shí)間: 22(小時(shí))
注冊時(shí)間: 2010-09-02
最后登錄: 2012-10-20
查看xxj040202的 主題 / 回貼
樓主  發(fā)表于: 2011-11-23 19:35
有一臺控制變壓器380/220，接線(xiàn)時(shí)低壓側零線(xiàn)端接地有什么作用，為什么？請教各位大蝦。
wxwwm
級別: 探索解密
精華主題: 0
發(fā)帖數量: 46 個(gè)
工控威望: 189 點(diǎn)
下載積分: 662 分
在線(xiàn)時(shí)間: 89(小時(shí))
注冊時(shí)間: 2009-03-05
最后登錄: 2023-04-29
查看wxwwm的 主題 / 回貼
1樓  發(fā)表于: 2011-11-23 22:16
一般不接地，接地主要是防止初級和次級線(xiàn)圈擊穿時(shí)在低壓側產(chǎn)生380V電壓
bocc
級別: 網(wǎng)絡(luò )英雄
精華主題: 0
發(fā)帖數量: 622 個(gè)
工控威望: 5239 點(diǎn)
下載積分: 3143 分
在線(xiàn)時(shí)間: 986(小時(shí))
注冊時(shí)間: 2009-09-13
最后登錄: 2016-07-01
查看bocc的 主題 / 回貼
2樓  發(fā)表于: 2011-11-23 22:30
引用
引用第1樓wxwwm于2011-11-23 22:16發(fā)表的  :
一般不接地，接地主要是防止初級和次級線(xiàn)圈擊穿時(shí)在低壓側產(chǎn)生380V電壓

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">