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class="sscmegika" id="submenu_數(shù)字微安表" style="display:none"> <ul class="two_profl"> <li><a href="/SonList-538075.html">直流微安表</a></li> </ul> </div> </li> </ul> </div> </div> <div id="sscmegika" class="nymiddlezty"> <div id="sscmegika" class="mianbao">您現(xiàn)在的位置：<a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > 使用直流高壓發(fā)生器的測量方法有哪幾種</div> <div id="sscmegika" class="about_con"> <h1 class="newstit">使用直流高壓發(fā)生器的測量方法有哪幾種</h1> <div id="sscmegika" class="newstime"> <span id="sscmegika" class="skim"><em>瀏覽次數(shù)：</em>351</span><span id="sscmegika" class="skimtim"><em>發(fā)布日期：</em>2024-07-22 </span> </div> <div>　　<strong>使用直流高壓發(fā)生器的測量方法有哪幾種</strong><br /> </div><div>　　高壓發(fā)生器別名為直高發(fā)或者直流高壓發(fā)生器，它是專門用來檢測電力器件的電氣絕緣強(qiáng)度和泄漏電流。<br /> </div><div>　　一般使用高壓發(fā)生器都是對氧化鋅避雷器、電力電纜、變壓器、發(fā)電機(jī)等高壓電氣設(shè)備進(jìn)行直流耐壓試驗(yàn)。不同的被試品測量方法也不同。<br /> </div><div>　　一、微安表微安表必須有金屬屏蔽，應(yīng)采用屏蔽線與試品聯(lián)接。高壓引線的屏蔽引出應(yīng)與儀表端的屏蔽緊密聯(lián)接。如果試品表面污穢要排除試品表面泄漏電流的影響可在試品高電位端用裸金屬軟線緊密繞幾圈后與高壓引線的屏蔽相聯(lián)接(見下圖)。<br /> </div><div align="center"><img src="https://img59.afzhan.com/9/20240722/638572539500553528378.jpg" alt="0ccdcec7898c069f1f6b8d1ce7cdb22.jpg" width="508" height="508" align="" border="0" /></div><div>　　二、氧化鋅、避雷器對氧化鋅、磁吹避雷器等試品接地端可拆開的情況下，也可采用在試品的底部(地電位側(cè))串入電流表進(jìn)行測量的方式。當(dāng)要排除試品表面泄漏電流的影響，可用軟的裸銅線在試品地電位端繞上幾圈并與屏蔽線的屏蔽相聯(lián)接(見下圖)<br /> </div><div align="center"><img src="https://img56.afzhan.com/9/20240722/638572539502844588592.jpg" alt="d0b20d7c119745180ba24b0268eaf62.jpg" width="509" height="509" align="" border="0" /></div><div>　　對于氧化鋅避雷器等小電容試品一般通過測壓電阻放電時(shí)間很快。而對電纜等大電容試品一般要待試品電壓自放電至試驗(yàn)電壓的20%以下，再通過配套的放電--棒進(jìn)行放電。待試品充分放電后掛好接地線，才允許進(jìn)行高壓引線的拆除和更換接線工作。<br /> </div><div>　　*后需要強(qiáng)調(diào)的是使用直流高壓試驗(yàn)器的工作人員必須是具有“高壓試驗(yàn)上崗證"的專業(yè)人員<br /> </div><div>　　<br /> </div> <div class="sscmegika" id="news_sx"><li 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