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<ul> <li id="m4sedaowg009" class="ej"><a href="/SonList-2479705.html" class="eja">隔離開關(guān)觸頭壓力測試儀</a></li> </ul> </div> </li> </ul> </div> </div></div> <div id="m4sedaowg009" class="inpage_right"> <div id="m4sedaowg009" class="mbx2"><a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > 2019-05-14</div> <div id="m4sedaowg009" class="inpage_content"> <div id="m4sedaowg009" class="nr_main_box"> <h1 class="inside_rnewtil">全自動變比測量</h1> <div id="m4sedaowg009" class="inside_rnewtime">點擊次數(shù)：1245 更新更新時間：2019-05-14</div> <div id="m4sedaowg009" class="inside_rnewcon"><h3 style="margin: 20px 0px 12px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: 20px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; color: rgb(0, 0, 0); text-align: justify;"><span style="border:0px; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">電流互感器</span></span></span></h3><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">1.采用電流法測量電流互感器的變比</span></span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">電流法測量電流互感器的變比是一種傳統(tǒng)的試驗方法，現(xiàn)在各發(fā)電廠，變電站</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">等基本上都采用該方法。它的試驗接線如圖</span>1所示。由電流表A1<span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">可以測得標準</span></span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">電流互感器</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">的二次電流</span>i1<span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">，根據(jù)標準</span></span><span style="border:0px; box-sizing:border-box; color:rgb(85, 85, 85); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">圖1</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 0em; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><img alt="變比測量??.jpg" src="http://www.wh-huayi.com/ueditor/asp/upload/image/20190118/15477785839401487.jpg" style="border:none; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; image-rendering:-webkit-optimize-contrast; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline" title="變比測量??.jpg" /></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify;"><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">電流互感器的變比可以計算出被測電流互感器的一次側(cè)電流</span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 0em; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><img alt="一次側(cè)電流.jpg" src="http://www.wh-huayi.com/ueditor/asp/upload/image/20190118/15477787284583021.jpg" style="border:none; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; image-rendering:-webkit-optimize-contrast; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline" title="一次側(cè)電流.jpg" /></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">，表</span>A2<span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">測得的是它的二次側(cè)電流</span>i2<span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">，由</span>I1<span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">和</span>i2<span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">即可計算出被測</span></span><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">電流互感器的變比</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 0em; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">K=<span style="border:0px; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">I</span><span style="border:0px; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">1</span>:<span style="border:0px; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">i</span><span style="border:0px; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">2</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">在用電流法測試電流互感器的變比試驗中一般采取以下兩個措施：</span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">（</span>1）電流互感器的一次側(cè)試驗電流接近其</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">額定電流。</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">（</span>2）電流互感器的二次側(cè)僅串接一塊</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">電流表以使電流互感器近似短路運行。</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">從理論上來說，用電流法測量電流互感器的變比實際上是模擬它在額定情況下的實際運行，是一種非常理想的試驗方法，測量的精度比較高，在現(xiàn)場試驗</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">中，措施（</span>1）和（2）也還比較容易實現(xiàn)。</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">2.采用電壓法測量電流互感器的變比</span></span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">電壓法測量電流互感器的變比是一種新型的試驗方法，它需要的試驗設(shè)備比較少，其試</span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 0em; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><img alt="連接變壓器電壓比測量1.jpg" src="http://www.wh-huayi.com/ueditor/asp/upload/image/20190118/15477790203393339.jpg" style="border:none; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; image-rendering:-webkit-optimize-contrast; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline" title="連接變壓器電壓比測量1.jpg" /></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">驗接線</span><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">如圖</span>3所示。</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">由于電流互感器二次繞組的電阻</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">和漏抗值都比較小，一般為</span>1~15，只要控制</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">勵磁電流</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">I0<span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">在一個合適的范圍內(nèi)（</span>m*），U2<span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">與</span>E2<span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">之間的差值帶來的</span></span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">誤差就可以忽略不計，用電壓法測量電流互感器的變比就可以取得非常高的精度</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 102, 204); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"> </span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">。</span></span></p><h3 style="margin: 20px 0px 12px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: 20px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; color: rgb(0, 0, 0); text-align: justify;"><span style="border:0px; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">變壓器</span></span></span></h3><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">目前常用測量方法有雙電壓表法和變比電橋法。</span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">（1）雙電壓表法</span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">用雙電壓表法測量時，一般在變壓器的一次側(cè)</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">施加電源電壓，整個測試過程中應(yīng)保持試驗電源的穩(wěn)定性，在變壓器的兩側(cè)分別用精度不低于</span>0.5級的</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">電壓表或精度</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">不低于</span>0.2級電壓互感器測取電壓計算變比，并且2塊電壓表應(yīng)同時讀數(shù)，特別是在</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">電壓波動較大的時候，尤其要注意這點。為確保測量的準確度</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 0em; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><img alt="不同接線組別的變壓器變比計算方法2.jpg" src="http://www.wh-huayi.com/ueditor/asp/upload/image/20190118/15477790392635831.jpg" style="border:none; box-sizing:border-box; font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; image-rendering:-webkit-optimize-contrast; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline" title="不同接線組別的變壓器變比計算方法2.jpg" /></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">，試驗電源電壓以高于加壓側(cè)額定電壓</span><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">的</span>1/3以上為宜。這種測量變比的方法所采用的</span><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">試驗設(shè)備均為常用測量儀器儀表，較容易取得。</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">對于單相變壓器，可以直接用測試結(jié)果得到變比。測量三相變壓器時，可以使用單相電源，也可以用三相電源做為測試電源。如果使用三相電源，應(yīng)施加對稱的三相試驗電源電壓作用在對應(yīng)繞組的同極性端，并要求測量時所使用的三相電源電壓必須三相保持對稱、穩(wěn)定，其三相的不平衡度</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">不應(yīng)超過</span>2%。若三相電源電壓存在不*對稱的情況，將導(dǎo)致</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">線電壓與相電壓的關(guān)系變化，需要進行轉(zhuǎn)換時兩者的關(guān)系比不再是</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify;"><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">，使得變比計算時出現(xiàn)誤差，影響測試結(jié)果的分析判斷。</span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">采用三相電源所測量計算出的變比即變壓器的線電壓之比。采用單相電源測量三相變壓器的變比時，測量步驟較多，但測量值能夠直接反映該相的繞組匝數(shù)比，從而找到存在繞組缺陷的相別，并且不需要考慮測量值是否受到電源三相電壓不對稱的影響。當使用單相電源分相測量三相變壓器的變比時，在采用三</span><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">角形連接的</span><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">繞組</span><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">中，非測試</span><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">相繞組</span><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">必須</span><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">短接</span><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">，從而使非被測相繞組中無</span><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">勵磁電流</span><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">流過，所測得的變比僅反映加壓相的情況。以Y，yn（同Y，y）接法的變壓器為例，電壓表的接線如圖1所示。</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">當采用單相電源測量三相變壓器變比，加壓端子</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">為</span>UV時不同接線組別的變壓器變比計算方法如表1所示。</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">試驗中對測試回路接線時，應(yīng)確保電壓表的連線可靠，測試線盡可能短，避免因引線過長而造成測量誤差。</span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">雙電壓表法雖然原理簡單、容易測量，但試驗電壓高、不安全、所用表計精密度要求高，所得結(jié)果會受到電壓互感器的誤差、儀表接線電阻的誤差、現(xiàn)場電磁干擾、試驗電壓高低等因素的影響。</span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">（2）變比電橋法</span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">變比電橋是測量變壓器變比的電橋，具有簡便、可靠、準確度高、靈敏度高的優(yōu)點，通常其準確度</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">可達到</span>0.1%以上，并且試驗電壓低、安全，可直接讀取變比誤差。若采用自動變比測量儀，還能在測量變比的同時完成變壓器連接組別的測量，并能夠測量變壓器的</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">繞組極性，實現(xiàn)量程自動切換、自動記錄和計算分析試驗數(shù)據(jù)等功能。</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">變比電橋根據(jù)測試原理的不同有2種類型：</span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">①</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">電阻電橋</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">是將變壓器的一次和二次繞組連接構(gòu)成電橋的</span>2個橋臂，與變比電橋中的2組電阻一起形成電橋電路，在變壓器</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">一次側(cè)</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">施加測試電壓</span>U1，通過對調(diào)節(jié)</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">電阻值的調(diào)整使電橋達到平衡狀態(tài)，利用電壓比等于電阻比的特點，通過對電阻比的測量得到變壓器的變比值。此類電橋?qū)τ陔姌蚋鱾€旋鈕的要求比較高，各旋鈕的接觸電阻應(yīng)盡量一致，并在各種工作條件下，接觸電阻值能夠穩(wěn)定不變，以確保測量結(jié)果的準確性。</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">② </span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">感應(yīng)式電橋</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">是將變壓器的一次和二次繞組與變比電橋中的標準電壓互感器的</span>2個</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">繞組</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">連接構(gòu)成電橋的</span>4個橋臂，通過對標準</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">電壓互感器電壓比的調(diào)節(jié)，使電橋達到平衡，此時標準電壓互感器的電壓比即為變壓器的電壓比。由于此類電橋檢測的是電壓信號而不是電阻值，故對接觸電阻的要求較電阻電橋的低，其測量誤差主要與電橋內(nèi)標準電壓互感器的準確度有關(guān)。</span></span></p><p style="margin: 18px 0px 15px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-stretch: inherit; font-size: 15px; line-height: 24px; font-family: Tahoma, "Microsoft YaHei", Arial, 宋體, 黑體, sans-serif; vertical-align: baseline; box-sizing: border-box; text-align: justify; text-indent: 28px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-family:inherit; font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">以常用的</span>QJ35型變比電橋為例，在使用前應(yīng)根據(jù)變壓器繞組的極性或接線組別正確連接電橋與被試變壓器，并正確選擇放置</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">短接</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">開關(guān)和極性開關(guān)的位置。測試前將試品的額定</span>K值根據(jù)</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">銘牌</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">數(shù)值計算出來并取</span>4位</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">有效值</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">，然后按計算出來的結(jié)果設(shè)置電橋上的</span>K值。插上電源，注意核對</span><span style="border:0px; box-sizing:border-box; font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">相線與中性線的正確性。試驗通電前可先將靈敏度旋至大，調(diào)節(jié)零位使微安表指向零位。試驗通電后的調(diào)節(jié)過程中必須注意微安表指針不超過滿刻度。調(diào)整誤差盤，當微安</span><span style="border:0px; box-sizing:border-box; color:rgb(51, 51, 51); font-family:微軟雅黑; font-size:14px; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; letter-spacing:0px; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline"><span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; vertical-align:baseline">指零時誤差盤上的指示即為變比誤差。試驗中進行三相變換時，應(yīng)先降低并切斷試驗電壓，切不能帶電進行接線變更。測試完畢，應(yīng)將電橋的所有開關(guān)放在</span>“關(guān)”或“零位”<span style="border:0px; box-sizing:border-box; color:rgb(0, 0, 0); font-size:inherit; font-stretch:inherit; font-style:inherit; font-variant:inherit; font-weight:inherit; line-height:inherit; margin:0px; padding:0px; 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