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        HGW9T隔離開關(guān)

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          HGW9T隔離開關(guān),是上海人民電氣有限公司 http://m.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...

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        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
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