Mike Krzyzewski is really a famous coach of Dream Team. She has coached north america men's basketball team for some time, that's clinched numerous medals for his country. Following Londonfl jerseys supplyn Olympic was over, Krzyzewski told The Associated Press that this game will be his final one as national coach, a job he's held for seven years. He had left open the possibility of swomen nfl jerseystaying with the team beyond the London Games, when practice on Saturday said these will be his last Olympics.When asked if he was sure, Krzyzewski didn't hesitate before again saying, "yecheap nfl jerseys wholesales," this will be his last game "If we could win it, then it might be three major championships in a row, i always do not know when that has been done because we haven't usually won http://govoriotkrito.bg/libs/nflcn08.htmthe globe championships," Krzyzewski said. "It becomes an enormous thing for the program." Whatever, he's an awesome coach. His achievement are going to be remembered by the country.cheap nfl jerseys

        公司產(chǎn)品   Product
        熱門產(chǎn)品   Hot
        搜索   Search

        HGW9T隔離開關(guān)

        更新:2013/9/26 13:43:24      點(diǎn)擊:
        • 產(chǎn)品品牌   
        • 產(chǎn)品型號   HGW9T
        • 產(chǎn)品描述

          HGW9T隔離開關(guān),是上海人民電氣有限公司 http://www.daptopoultryclub.com 為您提供的關(guān)于HGW9T隔離開關(guān)型號,HGW9T隔離開關(guān)價格,有關(guān)HGW9T隔離開關(guān)的相關(guān)資料,上海人民電氣...

        產(chǎn)品介紹
        高壓隔離開關(guān)用途:室外型包括單極開關(guān)及三極隔離開關(guān),常用作把供電線路與用戶分開的第一斷路隔離開關(guān);室內(nèi)型往往與高壓斷路器串聯(lián)連接,配套使用,以保證停電的可靠性。此外,在高壓成套配電裝置中,隔離開關(guān)常用作電壓互感器,避雷器,配電所用變壓器及計(jì)量柜的高壓控制電器。         高壓隔離開關(guān)技術(shù)性能:隔離開關(guān)沒有滅弧裝置,不能帶負(fù)荷進(jìn)行操作。對于10KV的隔離開關(guān),在正常情況下,它允許的操作范圍是:分,合電壓互感器和避雷器。分,合母線的充電電流。分,合勵磁電流不超過2A的空載變壓器和電容電流不超過5A的空載線路。5,60年代的老變壓器,空載電流表大,因此那時規(guī)定:戶外型隔離開關(guān)只能分合560KVA及以下的變壓器的空載電流,戶內(nèi)型隔離開關(guān)由于相間距離小,只能分合320KVA及以下的變壓器空載電流。后來的S7系列及現(xiàn)在的S9系列的變壓器空載電流比老式的變壓器有明顯的下降,但沒有新的規(guī)程對隔離開關(guān)操作變壓器空載容量提出明確的限定范圍,因此可按不超過2A來考慮;至于5A的電容電流的具體所指是這樣的:戶外型隔離開關(guān)可分,合長度不超過10KM的架空線路的空載電流。對于空載的電纜線路,其電容電流遠(yuǎn)大于同長度的架空線路,且受電纜的芯數(shù),截面等影響,所以難于用一個長度來限定。        高壓隔離開關(guān)安裝:戶外型的隔離開關(guān),露天安裝時應(yīng)水平安裝,使帶有瓷裙的支持瓷瓶確實(shí)能起到防雨作用;戶內(nèi)型隔離開關(guān),在垂直安裝時,靜觸頭在上方,帶有套管地可以傾斜一定角度安裝。一般情況下,靜觸頭接電源,動觸頭接負(fù)荷,但安裝在受電柜里的隔離開關(guān),采用電纜進(jìn)線時,則電源在動觸頭側(cè),這種接法俗稱“倒進(jìn)火”。隔離開關(guān)兩側(cè)與母線及電纜地連接應(yīng)牢固,遇有銅,鋁導(dǎo)體接觸時,應(yīng)采用銅鋁過渡接頭,以防電化腐蝕。隔離開關(guān)的動靜觸頭應(yīng)對準(zhǔn),否則合閘時就會出現(xiàn)旁擊現(xiàn)象,使合閘后動靜觸頭接觸面壓力不均勻,造成接觸不良。隔離開關(guān)的操作機(jī)構(gòu),傳動機(jī)械應(yīng)調(diào)整好,使分合閘操作能正常進(jìn)行,沒有抗勁現(xiàn)象。還要滿足三相同期的要求,即分合閘時三相動觸頭同時動作,不同期的偏差應(yīng)小于3MM。此外,處于合閘位置時,動觸頭要有足夠的切入深度,以保證接觸面積符合要求,但又不允許合過頭,要求動觸頭距靜觸頭底座有3至5MM的空隙,否則合閘過猛時將敲碎靜觸頭的支持瓷瓶。處于拉開位置時,動靜觸頭間要有足夠的拉開距離,以便有效地隔離帶電部分,這個距離應(yīng)不小于160MM,或者動觸頭與靜觸頭之間拉開角度不應(yīng)小于65度。 
        隔離功能隔離開關(guān)的選擇 隔離開關(guān)配置在主接線上,保證了線路及設(shè)備檢修時形成明顯的斷口與帶電部分隔離,由于隔離開關(guān)沒有滅弧裝置及開斷能力低,所以操作隔離開關(guān)時,必須遵守
        倒閘操作順序,即送電時,首先合上母線側(cè)隔離開關(guān),其次合上線路側(cè)隔離開關(guān),最后合上斷路器,停電則于上述相反
        更多產(chǎn)品
        99热这里只有精品色综合,2018AV无码视频在线播放,国产美女一级a爱,久久人人超碰精品CAOPOREN 看国产精品美女黄片 日本熟妇牲交视频在线观看,国产在线播放99,国产一级无码视频,国产在线观看添荫蒂视频|www.tjnx.com.cn/ 日本熟妇牲交视频在线观看,国产在线播放99,国产一级无码视频,国产在线观看添荫蒂视频|www.zzshanglu.com http://www.tjnx.com.cn/ http://www.zzshanglu.com