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pingfang="" text-wrap:="" padding:=""><strong><span style="font-family: 宋體, SimSun; font-size: 16px;">鉗形接地電阻儀測量單點接地電阻如何在無土壤的環(huán)境下使用</span></strong></p><p style="margin-top: 0px; margin-bottom: 0px; font-family: " pingfang="" text-wrap:="" padding:=""><strong><span deep="11" style="font-family: 宋體, SimSun; font-size: 16px;"><span microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" background-color:="" style="clear: both; padding: 0px; margin: 0px; color: rgb(51, 51, 51);" br="" white-space:="" data-filtered="filtered"><span microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" background-color:="" style="clear: both; padding: 0px; margin: 0px; color: rgb(51, 51, 51);" br="" white-space:="" data-filtered="filtered"><img alt="鉗形接地電阻儀測量單點小常識" src="https://img60.afzhan.com/9/20240524/638521615421839409704.png" microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" height:="" auto="" data-bd-imgshare-binded="1" style="clear: both; padding: 0px; margin: 0px; color: rgb(51, 51, 51);" br="" data-filtered="filtered" /><span microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" background-color:="" style="clear: both; padding: 0px; margin: 0px; color: rgb(51, 51, 51);" r="R表" br="" white-space:="" data-filtered="filtered"><span microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" background-color:="" style="clear: both; padding: 0px; margin: 0px; color: rgb(51, 51, 51);" br="" white-space:="" data-filtered="filtered"><span microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" background-color:="" style="clear: both; padding: 0px; margin: 0px; color: rgb(51, 51, 51);" br="" white-space:="" data-filtered="filtered"><span microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" background-color:="" style="color: rgb(51, 51, 51);" p="" span=""><span microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" background-color:="" br="" white-space:="" style="clear: both; padding: 0px; margin: 0px;"><img alt="鉗形接地電阻儀測量單點小常識" src="https://img60.afzhan.com/9/20240524/638521615425253831355.png" microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" height:="" width:="" width="592" height="462" data-bd-imgshare-binded="1" style="clear: both; padding: 0px; margin: 0px;" br="" /><span microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" background-color:="" br="" white-space:="" style="clear: both; padding: 0px; margin: 0px;"><img alt="鉗形接地電阻儀測量單點小常識" src="https://img60.afzhan.com/9/20240524/638521615427753756115.png" microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" height:="" width:="" width="596" height="447" data-bd-imgshare-binded="1" style="clear: both; padding: 0px; margin: 0px;" br="" /><span microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" background-color:="" r="2.1Ω。</span" br="" white-space:="" style="clear: both; padding: 0px; margin: 0px;"><img alt="鉗形接地電阻儀測量單點小常識" src="https://img60.afzhan.com/9/20240524/638521615430097257518.png" microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" height:="" auto="" data-bd-imgshare-binded="1" style="clear: both; padding: 0px; margin: 0px;" br="" /><span microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" background-color:="" rl="0.4Ω。</span" br="" white-space:="" style="clear: both; padding: 0px; margin: 0px;"><span microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" background-color:="" r-rl="2.1Ω-0.49Ω=1.61Ω，RA＜1.61Ω說明A點的接地電阻值是合格的。</span" br="" white-space:="" style="clear: both; padding: 0px; margin: 0px;"><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="clear: both; padding: 0px; margin: 0px;" span="" />2、三點法，測量原理請見下圖，此方法可準確測量接地體的接地電阻值。</span><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="max-width: 98%; height: auto; margin: 0px; padding: 0px; max-height: 100%;" img="" alt="" src="https://img57.chem17.com/9/20240403/638477254839347654524.png" height:="" auto="" data-bd-imgshare-binded="1" /><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="clear: both; padding: 0px; margin: 0px;" span="" />由于：R1=RA+RB</span><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="clear: both; padding: 0px; margin: 0px;" span="" /> R2=RA+RC</span><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="clear: both; padding: 0px; margin: 0px;" span="" /> R3=RB+RC</span><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="clear: both; padding: 0px; margin: 0px;" span="" />所以：RA=(R1+R2-R3)/2</span><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="clear: both; padding: 0px; margin: 0px;" span="" />注：測量R1時AC、BC間不能有導線連接。R2、R3類推。</span><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="clear: both; padding: 0px; margin: 0px;" span="" />這時我們需要用上第三個接地體消防栓C點，分別測量AB、AC、BC間的阻值。</span><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="clear: both; padding: 0px; margin: 0px;" span="" />**步：測量AB間的阻值R1=2.1Ω</span><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="max-width: 98%; height: auto; margin: 0px; padding: 0px; max-height: 100%;" img="" alt="" src="https://img56.chem17.com/9/20240403/638477254846481689666.png" height:="" auto="" data-bd-imgshare-binded="1" /><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="clear: both; padding: 0px; margin: 0px;" span="" />**步：測量AC間阻值R2=2.9Ω</span><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="max-width: 98%; height: auto; margin: 0px; padding: 0px; max-height: 100%;" img="" alt="" src="https://img59.chem17.com/9/20240403/638477254851899656546.png" height:="" auto="" data-bd-imgshare-binded="1" /><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="clear: both; padding: 0px; margin: 0px;" span="" />第三步：測量BC間的阻值R3=2.3Ω</span><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="max-width: 98%; height: auto; margin: 0px; padding: 0px; max-height: 100%;" img="" alt="" src="https://img59.chem17.com/9/20240403/638477254852837121717.png" height:="" width:="" width="607" height="467" data-bd-imgshare-binded="1" /><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="clear: both; padding: 0px; margin: 0px;" span="" /> 測量結果：RA=(R1+R2-R3)/2=2.1+2.9-2.3）/2=1.35Ω，A點的接地電阻值是合格的。為了便于記憶，可將三個接地體看作一個三角形，則被測電阻等于鄰邊電阻相加，然后減對邊電阻除2。</span><br microsoft="" segoe="" helvetica="" ui="" font-size:="" text-align:="" white-space:="" background-color:="" style="clear: both; padding: 0px; margin: 0px;" span="" /> 測試結果也證明鉗形接地電阻儀采用二點法和三點法，能快速測量單點接地體的接地電阻值，能應用于地樁式接地電阻測試儀無法測試的場合。</span></strong></p> <div class="sscmegika" id="news_sx"><li id="sscmegika" class="sx_left">上一篇：<a href="/News-440208.html">微機保護測試儀在電力系統(tǒng)維護中的重要性</a> <br />下一篇：<a href="/News-438231.html">分享KD660微機繼電保護測試儀各種繼電器的試驗方法</a></li></div> </div> </div> </div> </div> <script type="text/javascript"> 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