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<div id="pr3mjyzo" class="appContent"> <div id="pr3mjyzo" class="datum_info"> <h1 class="title">接地電阻測(cè)試儀原理</h1> <div id="pr3mjyzo" class="bgcolor_01"> <div id="pr3mjyzo" class="bgcolor_sum"> <div id="pr3mjyzo" class="left">日期：2024-11-18 10:40</div> <div id="pr3mjyzo" class="right">瀏覽次數(shù)：89</div> </div> <div id="pr3mjyzo" class="bgcolor_sum01"> 摘要：上?？档请姎饪萍加邢薰?電力技術(shù) </div> </div> <div id="pr3mjyzo" class="content"> <p style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;margin-top:0px;margin-bottom:0px;color:#374151;font-family:ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";font-size:16px;background-color:#FFFFFF;"> <span style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;font-weight:bolder;">接地電阻測(cè)試儀原理</span><br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 一、兩線法<br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 1、條件：必須有已知接地良好的地，如PEN等，所測(cè)量的結(jié)果是被測(cè)地和已知地的電阻和。如果已知地遠(yuǎn)小于被測(cè)地的電阻，測(cè)量結(jié)果可以作為被測(cè)地的結(jié)果。<br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 2、適用于：樓群稠密或水泥地等密封無(wú)法打地樁的地區(qū)。<br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 3、接線：E+ES接到被測(cè)地，H+S接到已知地。<br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 二、三線法<br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 1、條件：必須有兩個(gè)接地棒：一個(gè)輔助地和一個(gè)探測(cè)電極。各個(gè)接地電極間的距離不小于20米。原理是在輔助地和被測(cè)地之間加上電流，測(cè)量被測(cè)地和探測(cè)電極間的電壓降，測(cè)量結(jié)果包括測(cè)量電纜本身的電阻。<br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 2、適用于：地基接地，建筑工地接地和防雷接地。<br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 3、接線：S接探測(cè)電極，H接輔助地，E和ES連接后接被測(cè)地。<br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 三、四線法<br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 基本上同三線法，在低接地電阻測(cè)量和消除測(cè)量電纜電阻對(duì)測(cè)量結(jié)果的影響時(shí)替代三線法，測(cè)量時(shí)E和ES必須單獨(dú)直接連接到被測(cè)地。該方法是所有接地電阻測(cè)量方法中準(zhǔn)確度*高的。<br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 四、單鉗測(cè)量<br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 1、條件：測(cè)量多點(diǎn)接地中的每個(gè)接地點(diǎn)的接地電阻，而且不能斷開(kāi)接地連接防止發(fā)生危險(xiǎn)。<br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 2、適用于：多點(diǎn)接地，不能斷開(kāi)連接，測(cè)量每個(gè)接地點(diǎn)的電阻。<br style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;"> 3、接線：用電流鉗監(jiān)測(cè)被測(cè)接地點(diǎn)上的電流。 </p> <p align="center" style="box-sizing:border-box;border:0px solid #E5E7EB;--tw-backdrop-sepia:;margin-top:0px;margin-bottom:0px;color:#374151;font-family:ui-sans-serif, system-ui, 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