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class="left_nav_xl"><a href="/SonList-1408386.html" title="壓敏電阻測試儀">壓敏電阻測試儀</a></li> </div> </ul> </ul> </div> <div id="x0ntliz" class="page-right"> <div id="x0ntliz" class="onurl"> <a href="/"><img src="/Skins/333987/images/home.png"></a><a href="/">網(wǎng)站首頁</a>><a href="/article.html">技術(shù)文章</a> > 鉗形接地電阻測試儀你了解有多少看這篇文章就明白了</div> <div id="x0ntliz" class="page-news"> <div id="x0ntliz" class="newshowheader"> <h1 class="nd_title">鉗形接地電阻測試儀你了解有多少看這篇文章就明白了</h1> <div id="x0ntliz" class="article-info"> <span> 瀏覽：</span> 103<span id="x0ntliz" class="split">|</span> <span id="publishtime">更新時(shí)間：2024-12-02</span> <span id="x0ntliz" class="split">|</span> </div> </div> <div id="x0ntliz" class="page-newshow"> <p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px"><span style="box-sizing: border-box"><span style="box-sizing: border-box;font-weight: 700">鉗形接地電阻測試儀你了解有多少看這篇文章就明白了</span></span></span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px"></span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box; font-size: 16px; font-family: 宋體, SimSun;">所有鉗形接地電阻測試儀的使用方法都一樣。</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="font-weight: 700; box-sizing: border-box; padding: 0px; list-style-type: none; font-size: 16px; font-family: 宋體, SimSun;">形接地電阻測試儀</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">是上?？档请姎饪萍加邢薰?*的一款鉗形接地電阻測試儀，和傳統(tǒng)數(shù)字式接地電阻不同，</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">ETCR2000A<span style="">形接地電阻測試儀</span></span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">使用的是鉗形法，主要測回路接地系統(tǒng)，也叫多點(diǎn)接地，不需要放輔助線，直接打開鉗頭，夾住要測的接地引上線就可以出值，方便快捷，但很多時(shí)候，測不出值，或者說測出來的值比較大，那么</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">ETCR2000A<span style="">形接地電阻測試儀</span></span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">使用方法到底是怎樣的呢？今天來展開講一下。</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體"><img src="https://img47.chem17.com/9/20241202/638687222818098443538.png" alt="" data-bd-imgshare-binded="1" style="box-sizing: border-box;vertical-align: middle;border: 0px;max-width: 100%;height: auto;padding: 0px;list-style-type: none"/><br style="box-sizing: border-box;padding: 0px;list-style-type: none"/></span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;color: rgb(229, 51, 51);font-size: 16px">一、<span style="color: rgb(68, 68, 68); font-family: 宋體, SimSun; font-size: 16px; font-weight: 700; background-color: rgb(255, 255, 255);">形接地電阻測試儀</span></span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;color: rgb(229, 51, 51);font-size: 16px">注意事項(xiàng)</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;font-size: 16px">1. </span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">開機(jī)時(shí)鉗頭不能測東西，閉合好，正常顯示</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">OL</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">（無窮大）</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;font-size: 16px">2. 開機(jī)后，就算不使用也會(huì)有小的滴滴聲，鉗頭回路電流聲，正常現(xiàn)象</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;font-size: 16px">3. </span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">開機(jī)顯示</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">Er</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">，說明儀器自檢不過，不給使用，</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px;color: rgb(255, 255, 255);background-color: rgb(229, 51, 51)">Er</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px;color: rgb(255, 255, 255);background-color: rgb(229, 51, 51)">情況處理方法點(diǎn)這里</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;font-size: 16px">4. </span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">開機(jī)后，先測一下電阻環(huán)，顯示</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">5.0/5.1/5.2</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">可正常使用</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;font-size: 16px">5. 屏幕出現(xiàn)低電符號(hào)，說明電量不足，需要更新電池后再使用，有電不會(huì)出現(xiàn)符號(hào)</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;font-size: 16px">6. </span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">使用時(shí)要輕點(diǎn)，不要大力撞到鉗頭，不然容易出現(xiàn)</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">Er</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">情況</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;font-size: 16px">7. </span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">不能夾直徑超過</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">32MM</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">的接地線，不然容易造成鉗頭閉合不好</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;font-size: 16px">8. </span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">超過</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">10</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">天不使用，要拆下電池，防止電池漏液腐蝕電路板</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;margin-left: 0;color: rgb(68, 68, 68);font-size: 12px;text-indent: 0;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box; padding: 0px; list-style-type: none; color: rgb(229, 51, 51); font-size: 16px; font-family: 宋體, SimSun;">二、<span style="color: rgb(68, 68, 68); font-family: 宋體, SimSun; font-size: 16px; font-weight: 700; background-color: rgb(255, 255, 255);">形接地電阻測試儀</span>測試點(diǎn)的選擇</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;font-size: 16px">測試接地電阻時(shí)測量點(diǎn)的選擇是十分重要的。（請(qǐng)見下圖）</span><br style="box-sizing: border-box;padding: 0px;list-style-type: none"/><span style="box-sizing: border-box;font-size: 16px">在A點(diǎn)測量時(shí)鉗表顯示“OLΩ"，沒有形成回路，測量點(diǎn)是錯(cuò)誤的。</span><br style="box-sizing: border-box;padding: 0px;list-style-type: none"/><span style="box-sizing: border-box;font-size: 16px">在B點(diǎn)測量時(shí)鉗表顯示“L0.01Ω"，測試的是金屬回路的阻值，測量點(diǎn)是錯(cuò)誤的。</span><br style="box-sizing: border-box;padding: 0px;list-style-type: none"/><span style="box-sizing: border-box;font-size: 16px">在C點(diǎn)測量才是正確的。</span></p><p><img src="https://img47.chem17.com/9/20241202/638687222821067378493.png" alt="" width="100%" title="" align="" data-bd-imgshare-binded="1" style="box-sizing: border-box;vertical-align: middle;border: 0px;max-width: 100%;height: auto;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255);width: 850px"/><br style="box-sizing: border-box;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br style="box-sizing: border-box"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;margin-left: 0;color: rgb(68, 68, 68);font-size: 12px;text-indent: 0;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;color: rgb(229, 51, 51);font-size: 16px">三、<span style="color: rgb(68, 68, 68); font-family: 宋體, SimSun; font-size: 16px; font-weight: 700; background-color: rgb(255, 255, 255);">形接地電阻測試儀</span><span style="color: rgb(229, 51, 51); font-size: 16px; font-family: 宋體, SimSun;">多點(diǎn)接地使用（重復(fù)接地）</span></span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;font-size: 16px">多點(diǎn)接地是指多個(gè)接地點(diǎn)，引上線在地面上連在了一起，形成一個(gè)大地回路，比如架空輸電桿塔，多個(gè)接地連到同一設(shè)備，大樓樓頂防雷帶都是比較明顯的多點(diǎn)接地，這種情況鉗形接地電阻表比較好用，直接打開鉗口，夾住要測的線就可以，測出來的值比較準(zhǔn)。</span></p><p><img src="https://img47.chem17.com/9/20241202/638687222824036288557.jpg" alt="" data-bd-imgshare-binded="1" style="box-sizing: border-box;vertical-align: middle;border: 0px;max-width: 100%;height: auto;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"/><br style="box-sizing: border-box;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br style="box-sizing: border-box"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體"><img src="https://img47.chem17.com/9/20241202/638687222826848845213.jpg" alt="" data-bd-imgshare-binded="1" style="box-sizing: border-box;vertical-align: middle;border: 0px;max-width: 100%;height: auto;padding: 0px;list-style-type: none"/><br style="box-sizing: border-box;padding: 0px;list-style-type: none"/></span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;font-size: 16px">但多點(diǎn)接地還有兩種情況是需要特別注意，一種是測出來的值很大，另一種是測出來的值很小。</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;color: rgb(229, 51, 51);font-size: 16px">1. <span style="color: rgb(229, 51, 51); font-size: 16px; font-family: 宋體, SimSun;">測出來的值比較大</span></span><span style="box-sizing: border-box;font-size: 16px">，但不能確定就是要測的接地點(diǎn)不合格，可能是重復(fù)接地的一個(gè)點(diǎn)值很大，導(dǎo)致測出來的值很大，檢驗(yàn)方法是重新找一個(gè)天然接地點(diǎn)，比如金屬自來水管、消防栓，用一條導(dǎo)線，把要測的點(diǎn)和天然接地點(diǎn)連接，夾這條導(dǎo)線來測，如果值合格，一樣說明這個(gè)接地點(diǎn)是合格的。（花點(diǎn)時(shí)間找一下原本的重復(fù)回路是哪一條，可以的話重新構(gòu)建一下重復(fù)接地）</span></p><p><img src="https://img47.chem17.com/9/20241202/638687222831510952502.jpg" alt="" data-bd-imgshare-binded="1" style="box-sizing: border-box;vertical-align: middle;border: 0px;max-width: 100%;height: auto;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"/><br style="box-sizing: border-box;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br style="box-sizing: border-box"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="font-family: 宋體, SimSun;"><span style="box-sizing: border-box; padding: 0px; list-style-type: none; color: rgb(229, 51, 51); font-size: 16px;">2. 測出來的值很小</span><span style="box-sizing: border-box; font-size: 16px;">，</span></span><span style="box-sizing: border-box;font-size: 16px">這種情況一般都是測的回路只是金屬本身回路，也就是金屬本身阻抗，比較小，這個(gè)表示金屬間聯(lián)通很好，不是真正的接地電阻值，這種情況，如果要檢測真正的接地電阻值，檢驗(yàn)方法是重新找一個(gè)天然接地點(diǎn)，比如金屬自來水管、消防栓，用一條導(dǎo)線，把要測的點(diǎn)和天然接地點(diǎn)連接，夾這條導(dǎo)線來測，如果值合格，一樣說明這個(gè)接地點(diǎn)是合格的。</span></p><p><img src="https://img47.chem17.com/9/20241202/638687222834948448176.jpg" alt="" data-bd-imgshare-binded="1" style="box-sizing: border-box;vertical-align: middle;border: 0px;max-width: 100%;height: auto;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"/><br style="box-sizing: border-box;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br style="box-sizing: border-box"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;margin-left: 0;color: rgb(68, 68, 68);font-size: 12px;text-indent: 0;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255);text-align: justify"><span style="box-sizing: border-box; padding: 0px; list-style-type: none; color: rgb(229, 51, 51); font-size: 16px; font-family: 宋體, SimSun;">四、<span style="color: rgb(68, 68, 68); font-family: 宋體, SimSun; font-size: 16px; font-weight: 700; background-color: rgb(255, 255, 255);">形接地電阻測試儀</span>單點(diǎn)接地</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255);text-align: justify"><span style="box-sizing: border-box;font-size: 16px">單點(diǎn)接地主要有以下三種存在</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255);text-align: justify"><span style="box-sizing: border-box;font-size: 16px">1. 單個(gè)接地點(diǎn)，單條引上線接到設(shè)備上</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255);text-align: justify"><span style="box-sizing: border-box;font-size: 16px">2. 單個(gè)接地點(diǎn)，多條引上線接到不同設(shè)備上</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255);text-align: justify"><span style="box-sizing: border-box;font-size: 16px">3. 多個(gè)接地點(diǎn)，先連在一起，再向上線出一條或者多條引上線，接到不同設(shè)備上</span></p><p><img src="https://img48.chem17.com/9/20241202/638687222838928639184.jpg" alt="" data-bd-imgshare-binded="1" style="box-sizing: border-box;vertical-align: middle;border: 0px;max-width: 100%;height: auto;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"/><br style="box-sizing: border-box;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br style="box-sizing: border-box"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">從測試原理來說，</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">ETCR</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">2000</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">A</span><span style="box-sizing: border-box;font-size: 16px">鉗表只能測量回路電阻，對(duì)單點(diǎn)接地是測不出來的。但是，用戶可以利用一根測試線及接地系統(tǒng)附近的接地極，人為地制造一個(gè)回路進(jìn)行測試。下面介紹二種用鉗表</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">測量單點(diǎn)接地的方法，此方法可應(yīng)用于傳統(tǒng)的數(shù)字式接地電阻表無法測試的場合。例如地下室內(nèi)或樓層上的機(jī)房、避雷針、電梯、加油站、被混凝土覆蓋的接地體、以及無法從系統(tǒng)中分離的接地體等等，使用數(shù)字式接地電阻表測量接地電阻是非常困難的，但</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">ETCR2000</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">A</span><span style="box-sizing: border-box;font-size: 16px">鉗表利用輔助地極和一根測試線就可以測算出它們的接地電阻，方法有兩種：</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;color: rgb(229, 51, 51);font-size: 16px">1. <span style="color: rgb(68, 68, 68); font-family: 宋體, SimSun; font-size: 16px; font-weight: 700; background-color: rgb(255, 255, 255);">形接地電阻測試儀</span></span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-weight: 700;font-size: 16px"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;color: rgb(229, 51, 51)">二點(diǎn)法</span></span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;font-size: 16px">見下圖</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">，在被測接地體</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RA</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">附近找一個(gè)獨(dú)立的接地較好的接地體</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RB</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">（例如臨近的自來水管、建筑物等）。將</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RA</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">和</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RB</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">用一根測試線連接起來。</span></p><p><img src="https://img48.chem17.com/9/20241202/638687222841428356895.jpg" alt="" style="width:800px;"/><br style="box-sizing: border-box;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br style="box-sizing: border-box"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">由于鉗表所測的阻值是兩個(gè)接地電阻和測試線阻值的串聯(lián)值：</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RT=RA+RB+RL</span><span style="box-sizing: border-box;font-size: 16px">，</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">其中：</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RT</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">為鉗表所測的阻值</span><span style="box-sizing: border-box;font-size: 16px">，</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RL</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">為測試線的阻值</span><span style="box-sizing: border-box;font-size: 16px">，將測試線頭尾相連即可用鉗表</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">測出其阻值</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RL</span><span style="box-sizing: border-box;font-size: 16px">，應(yīng)用如下圖：</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><img src="https://img44.chem17.com/9/20241202/638687222845614647801.jpg" alt="" data-bd-imgshare-binded="1" style="box-sizing: border-box;vertical-align: middle;border: 0px;max-width: 100%;height: auto;padding: 0px;list-style-type: none"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;margin-left: 0;color: rgb(68, 68, 68);font-size: 12px;text-indent: 0;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;font-size: 16px">所以，如果鉗表的測量值小于接地電阻的允許值，那么這兩個(gè)接地體的接地電阻都是合格的。如果輔助地極接地良好（如消防栓、建筑物大地網(wǎng)等），由于輔助地極的接地電阻很小，所以被測地極的接地電阻近似于鉗表所測的阻值。</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;margin-left: 0;color: rgb(68, 68, 68);font-size: 12px;text-indent: 0;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;color: rgb(229, 51, 51);font-size: 16px">2. <span style="color: rgb(68, 68, 68); font-family: 宋體, SimSun; font-size: 16px; font-weight: 700; background-color: rgb(255, 255, 255);">形接地電阻測試儀</span></span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-weight: 700;font-size: 16px"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;color: rgb(229, 51, 51)">三點(diǎn)法</span></span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">三點(diǎn)法可以準(zhǔn)確測算出接地極的阻值。如下圖，在被測接地體</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">RA</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">附近找二個(gè)獨(dú)立的接地體</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">RB</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">和</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">RC</span><span style="box-sizing: border-box;font-size: 16px">，這兩個(gè)輔助接地體可以是深埋地下的金屬，也可以是自己打的輔助角鐵（深度</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">1</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">米以下）</span><span style="box-sizing: border-box;font-size: 16px">。</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">1）將</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">RA</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">和</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">RB</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">用一根測試線連接起來，</span><span style="box-sizing: border-box;font-size: 16px">見下圖。用鉗表</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">讀得di一個(gè)數(shù)據(jù)</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">R1</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-size: 16px">。</span></p><p><img src="https://img54.chem17.com/9/20241202/638687222848387227902.jpg" alt="" style="width:800px;"/><br style="box-sizing: border-box;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br style="box-sizing: border-box"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">2）將</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RB</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">和</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RC</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">連接起來，</span><span style="box-sizing: border-box;font-size: 16px">見下圖。用鉗表</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">讀得di二個(gè)數(shù)據(jù)</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">R2</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">。</span></p><p><img src="https://img54.chem17.com/9/20241202/638687222851980827187.jpg" alt="" data-bd-imgshare-binded="1" style="box-sizing: border-box;vertical-align: middle;border: 0px;max-width: 100%;height: auto;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"/><br style="box-sizing: border-box;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br style="box-sizing: border-box"/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">3）</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">將</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RC</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">和</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RA</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">連接起來，</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">見下圖。用鉗表</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">讀得di三個(gè)數(shù)據(jù)</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">R3</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">。</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體"><br style="box-sizing: border-box;padding: 0px;list-style-type: none"/><img src="https://img54.chem17.com/9/20241202/638687222854324859929.jpg" alt="" style="width:800px;"/></span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><br/></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">上面三步中，每一步所測得的讀數(shù)都是兩個(gè)接地電阻的串聯(lián)值。這樣，就可以很容易地計(jì)算出每一個(gè)接地電阻值：由于：</span><span style="box-sizing: border-box;font-size: 16px"> </span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">R1=RA+RB R2=RB+RC R3=RC+RA</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">所以：</span><span style="box-sizing: border-box;font-size: 16px"> </span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RA=</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">（</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">R1+R3-R2</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">）÷</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">2</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">這就是接地體</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RA</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">的接地電阻值。為了便于記憶上述公式，可將三個(gè)接地體看作一個(gè)三角形，則被測電阻等于鄰邊電阻相加減對(duì)邊電阻除以</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">2</span><span style="box-sizing: border-box;font-size: 16px">。</span></p><p style="box-sizing: border-box;margin-top: 0px;margin-bottom: 10px;color: rgb(68, 68, 68);font-size: 12px;white-space: normal;padding: 0px;list-style-type: none;font-family: 'Microsoft YaHei', Verdana, Arial, Helvetica, sans-serif;background-color: rgb(255, 255, 255)"><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: 宋體;font-size: 16px">其它兩個(gè)作為參照物的接地體的接地電阻值為：</span><span style="box-sizing: border-box;padding: 0px;list-style-type: none;font-family: Calibri;font-size: 16px">RB=R1-RA RC=R3-RA</span></p><p><br/></p> </div> <div id="x0ntliz" class="pagetb"> <p> 上一條：<a href="/Article-3880137.html">手搖式兆歐表技術(shù)參數(shù)</a></p> <p> 下一條：<a href="/Article-3880134.html">分流器分享上?？档请姎?/a></p> </div> </div> </div> </div> <div id="x0ntliz" class="footer"> <div id="x0ntliz" class="foot"> <p>Copyright © 2024 上?？档请姎饪萍加邢薰?版權(quán)所有 <a target="_blank" rel="nofollow">備案號(hào)：滬ICP備16026206號(hào)-4</a> 傳真：86-021-51714615<br /> 技術(shù)支持：<a target="_blank" rel="nofollow">化工儀器網(wǎng)</a> <a href="/sitemap.xml" target="_blank" >sitemap.xml</a> <a target="_blank" rel="nofollow">管理登陸</a> 總流量：370829<br /> 上?？档请姎饪萍加邢薰荆╳ww.jvcit.cn）主營：<strong><a href="/">ET3000雙鉗形接地電阻測試儀</a></strong>|<strong><a href="/">ZSR10A直流電阻測試儀</a></strong>|<strong><a 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