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src="http://www.chem17.com/mystat.aspx?u=mbdzkj"></script>  <div id="ubjn47ipz" class="ncontent w_1100"> <div id="ubjn47ipz" class="h-6">技術(shù)文章<span>您當(dāng)前的位置：<a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > 絕緣電阻測試儀屏蔽端（GUARD）的使用方法</span></div>  <div id="ubjn47ipz" class="n-3 c-news"> <div id="ubjn47ipz" class="newsnr"> <h1>絕緣電阻測試儀屏蔽端（GUARD）的使用方法</h1> <p class="source"><span>日期：2023-11-22</span><span>瀏覽：2922次</span></p> <div> <p><strong></strong></p><p style="margin-top: 0px; margin-bottom: 0px; margin-left: 21px; padding: 0px; font-family: 微軟雅黑; color: rgb(51, 51, 51); font-size: 13px; white-space: normal;"><strong><span style="margin: 0px; padding: 0px; font-family: 宋體; font-size: 19px;"><span style="margin: 0px; padding: 0px;">絕緣電阻測試儀屏蔽端（</span></span></strong><strong><span style="margin: 0px; padding: 0px; font-family: "Times New Roman"; font-size: 19px;">GUARD</span></strong><strong><span style="margin: 0px; padding: 0px; font-family: 宋體; font-size: 19px;"><span style="margin: 0px; padding: 0px;">）的使用方法</span></span></strong></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 微軟雅黑; color: rgb(51, 51, 51); font-size: 13px; white-space: normal;"><span style="margin: 0px; padding: 0px; font-family: 宋體; font-size: 19px;"> </span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 微軟雅黑; color: rgb(51, 51, 51); font-size: 13px; white-space: normal;"><span style="margin: 0px; padding: 0px; font-family: 宋體; font-size: 19px;"> </span><span style="margin: 0px; padding: 0px; font-family: 宋體; font-size: 19px;"><span style="margin: 0px; padding: 0px;">在電力電纜等的絕緣測量或外界電磁場干擾時，為了消除表面漏電和外界電磁場的干擾而影響測量結(jié)果的準(zhǔn)確度，在實際測量過程中，采用儀表的屏蔽端來消除漏電電流、屏蔽干擾。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 微軟雅黑; color: rgb(51, 51, 51); font-size: 13px; white-space: normal;"><span style="margin: 0px; padding: 0px; font-family: 宋體; font-size: 19px;"> <span style="margin: 0px; padding: 0px;">對于兩節(jié)及以上的被試品，例如避雷器、耦合電容可采用圖</span></span><span style="margin: 0px; padding: 0px; font-family: "Times New Roman"; font-size: 19px;">5</span><span style="margin: 0px; padding: 0px; font-family: 宋體; font-size: 19px;">所示的接線進(jìn)行測量。圖中將屏蔽端接到被測避雷器上一節(jié)法蘭上，這樣，由上方高壓線路等所引起的干擾電流由屏蔽端子屏蔽掉，而不經(jīng)過測試主回路，從而避免了干擾電流的影響。對最上節(jié)避雷器，可將其上法蘭接儀表地端（</span><span style="margin: 0px; padding: 0px; font-family: "Times New Roman"; font-size: 19px;">EARTH</span><span style="margin: 0px; padding: 0px; font-family: 宋體; font-size: 19px;">）后再接地，使干擾電流直接入地。但后者不能將干擾wuan全消除掉。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 微軟雅黑; color: rgb(51, 51, 51); font-size: 13px; white-space: normal;"><span style="margin: 0px; padding: 0px; font-family: 宋體;"> </span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 微軟雅黑; color: rgb(51, 51, 51); font-size: 13px; white-space: normal; text-align: center;"><img src="https://img70.chem17.com/9/20230609/638218949673697309489.png" title="3HCV_]FZ%I~4OGOZJ8W@9R6.png" alt="3HCV_]FZ%I~4OGOZJ8W@9R6.png" style="margin: 0px; padding: 0px; border: none; max-width: 800px; max-height: 300%;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 微軟雅黑; color: rgb(51, 51, 51); font-size: 13px; white-space: normal;"><span style="margin: 0px; padding: 0px; font-family: 宋體;"> </span><br/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 微軟雅黑; color: rgb(51, 51, 51); font-size: 13px; white-space: normal; text-align: center;"><span style="margin: 0px; padding: 0px; font-family: 宋體; font-size: 14px;"><span style="margin: 0px; padding: 0px;">圖</span><span style="margin: 0px; padding: 0px; font-family: "Times New Roman";">5 </span><span style="margin: 0px; padding: 0px;">利用屏蔽端屏蔽干擾</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 微軟雅黑; color: rgb(51, 51, 51); font-size: 13px; white-space: normal;"><span style="margin: 0px; padding: 0px; font-family: 宋體;"> </span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 微軟雅黑; color: rgb(51, 51, 51); font-size: 13px; white-space: normal;"><span style="margin: 0px; padding: 0px; font-family: 宋體; font-size: 19px;"><span style="margin: 0px; padding: 0px;">其它方面的應(yīng)用可參考此接法。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; margin-left: 21px; padding: 0px; font-family: 微軟雅黑; color: rgb(51, 51, 51); font-size: 13px; white-space: normal;"><strong><span style="margin: 0px; padding: 0px; font-family: 宋體; font-size: 19px;"> </span></strong></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 微軟雅黑; color: rgb(51, 51, 51); font-size: 13px; white-space: normal;"><strong><span style="margin: 0px; padding: 0px; font-family: 黑體; font-size: 19px;"><span style="margin: 0px; padding: 0px;">注意：</span></span></strong><span style="margin: 0px; padding: 0px; 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