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0px; font-family: "PingFang SC", Helvetica, "Microsoft YaHei", Arial, sans-serif; font-size: 12px;"><span style="font-size:16px">絕緣油耐壓測試儀試驗包括少油斷路器和多由斷路器試驗，其定期試驗項目如下：<br /> <br />一、測量絕緣電阻<br /> <br />測量絕緣電阻式斷路器試驗中的一項基本試驗，用2500V兆歐表進行測量。<br /> <br />高壓多油斷路器的絕緣部件有套管、拉桿、絕緣油等。測量高壓多油斷路器的絕緣電阻的目的主要是檢查拉桿對地絕緣，因此，應該在合閘狀態(tài)下進行。通過這項試驗往往可以靈敏的發(fā)現(xiàn)拉桿受潮，沿面貫穿性缺陷，如弧道傷痕、裂紋等。對于引線套管絕緣嚴重不良(如受潮等)，也能被檢出。例如某電業(yè)局1974年大修一臺日本產(chǎn)44KV斷路器，檢測發(fā)現(xiàn)B相拉桿受潮，絕緣電阻為1700MZ，干燥后，絕緣電阻恢復到4000MZ；另一臺G-100斷路器拉桿受潮，絕緣電阻為220MZ，用紅外線干燥后，絕緣電阻也恢復到4000MZ以上。<br /> <br />40.5KV以上高壓少油斷路器的主要絕緣部件有瓷套、拉桿和絕緣油。測量40.5KV以上高壓少油斷路器的絕緣電阻應分別在合閘狀態(tài)下進行。在合閘狀態(tài)下主要是檢查拉桿對地絕緣；在分閘狀態(tài)下主演是檢查各斷口之間的絕緣，通過測量可以檢查出內部消弧室是否受潮或燒傷。40.5KV以下高壓少油斷路器主要絕緣部件有瓷瓶和絕緣拐臂。測量40.5KV以下高壓少油斷路器的絕緣電阻，也分別在合閘與分閘狀態(tài)下進行，在合閘狀態(tài)下，可以檢查出內部消弧結構部分是否受潮或燒傷。<br /> <br />我公司有110KV少油斷路器，對于產(chǎn)生受潮的原因分析有以下幾點：<br /> <br />(1)天氣因素。今年由于天氣狀況出現(xiàn)反常，特別是進入夏季以來，雨水充沛，而進入秋季，白天氣高溫，濕度小，夜間溫度低，濕度大。晝夜溫差大，濕度差大是今年秋季天氣狀況的明顯特征。<br /> <br />(2)少油斷路器本身結構存在的缺陷。<br /> <br />1.與外界的通口太多；<br /> <br />2.油位的限制，使斷口或主瓷套中存有一段沒注油的空間；<br /> <br />3.各處的橡膠墊易老化。綜上述，正是由于今年天氣狀況出現(xiàn)反常，特別是進入10月份，白天溫度高,使斷路器未注油部分的空氣受熱膨脹而大量排出，當夜晚降臨，溫度降低，使其受冷，壓力減小而吸入外部潮濕的空氣，從而使絕緣油吸潮，這個過程反復多次，導致油中水分大增，從而導致泄漏增大。<br /> <br />二、針對上述原因采取的措施，在分析出原因，實事求是，從實際出發(fā)解決問題。對出現(xiàn)問題的斷路器的絕緣部件全部進行了更換，用真空濾油機將絕緣油濾至合格，然后，進行干燥，問題隨之解決。<br /> <br />三、電力測試試驗中為了能讓設備能安全運行，特別是室外設備，普遍現(xiàn)象是：絕緣電阻直線下降，泄漏電流增大，很多大大超過了《規(guī)程》的不大于10UA的標準，嚴重的甚至高達43UA，而且數(shù)量也是每年在增加。天氣狀況作為一個很重要的因素必須仔細觀測和研究，在遇到天氣異常時，如高溫、低溫、潮濕等天氣的時候我們要避免天氣的因素干擾，使我們的數(shù)據(jù)更真實，更可靠。<br /> <br />在油耐壓試驗中，一般少油斷路器試驗是很少進行的，因為其絕緣結構主要是瓷絕緣和環(huán)氧玻璃絲布類絕緣，不會存在管套受潮問題。難于有效的發(fā)現(xiàn)絕緣油的缺陷。所以，在試驗中我們主要的是用來進行交直流試驗，來對電網(wǎng)安全進行一個檢查。</span></p><p style="margin: 0px; padding: 0px; font-family: "PingFang SC", Helvetica, "Microsoft YaHei", Arial, sans-serif; font-size: 12px;"><span style="font-size:16px"><img alt="" src="http://img72.chem17.com/9/20201103/637399890008901536312.jpg" style="width:800px" /></span></p></div> <div id="ihno5c4uhq" 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