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id="pr3mjyzo" class="bgcolor_sum"> <div id="pr3mjyzo" class="left">日期：2024-11-18 20:29</div> <div id="pr3mjyzo" class="right">瀏覽次數(shù)：897</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="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><strong style="margin:0px;">ETCR2000系列鉗形接地電阻測試儀講解</strong></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><strong style="margin:0px;">ETCR2000系列鉗形接地電阻測試儀</strong><span style="margin:0px;background-color:#FAFAFA;font-family:tahoma;">廣泛應(yīng)用于電力、電信、氣象、油田、建筑及工業(yè)電氣設(shè)備等的接地電阻測量、回路電阻測量。在測量有回路的接地系統(tǒng)時，不需斷開接地引下線，不需輔助電極，**快速。ETCR鉗形接地電阻儀能測量出用傳統(tǒng)方法無法測量的接地故障，能應(yīng)用于傳統(tǒng)方法無法測量的場合，測量的是接地體電阻和接地引線電阻的綜合值。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><strong style="margin:0px;">ETCR2000系列鉗形接地電阻測試儀</strong></span><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;font-size:16px;">在測量有回路的接地系統(tǒng)時，不需斷開接地引下線，不需輔助電極，只需把鉗表直接鉗在接地引下線上即可，此時鉗表顯示值是接地體電阻和接地引線電阻的綜合值，該測量方法能快速、**的得出測量結(jié)果。</span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><strong style="margin:0px;">ETCR2000系列鉗形接地電阻測試儀</strong></span><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;font-size:16px;">能測量出用傳統(tǒng)方法無法測量的接地故障，能應(yīng)用于傳統(tǒng)方法無法測量的場合，并且廣泛應(yīng)用于各種設(shè)備的接地電阻測量。</span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;text-align:center;"> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;text-align:center;"> <span style="margin:0px;font-size:16px;"><strong style="margin:0px;">ETCR2000鉗形接地電阻測試儀</strong><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">現(xiàn)場應(yīng)用</strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;text-align:center;"> <span style="margin:0px;font-size:16px;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/D2/CgAGfFtWyUmAKhFuAABEQRMP8I8276.jpg" style="margin:0px;padding:0px;max-height:100%;height:auto;width:200px;"></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;text-align:center;"> <span style="margin:0px;font-size:16px;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/D2/CgAGfFtWyUaAJ9JYAADrqNrVQMM633.jpg" style="margin:0px;padding:0px;max-height:100%;height:auto;width:455px;"><span style="margin:0px;color:#3F3F3F;"> </span><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/D2/CgAGfFtWyUeAA3MJAAJE00myCS0454.jpg" style="margin:0px;padding:0px;max-height:100%;height:auto;width:332px;"></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;text-align:center;"> <span style="margin:0px;font-size:16px;"> <img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/D2/CgAGfFtWyUiAOnhpAAJLBGoHGbQ783.jpg" style="margin:0px;padding:0px;max-height:100%;height:auto;width:307px;"><span style="margin:0px;color:#3F3F3F;"> </span><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/D2/CgAGfFtWyUmAdvG-AAK__VmL2j0609.jpg" style="margin:0px;padding:0px;max-height:100%;height:auto;width:325px;"></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;text-align:center;"> <span style="margin:0px;color:#FF0000;"><strong style="margin:0px;"><span style="margin:0px;font-size:16px;">ETCR2000系列鉗形接地電阻測試儀</span></strong></span><span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">現(xiàn)場應(yīng)用</span></strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">1. </span></strong></span><span style="margin:0px;color:#FF0000;"><strong style="margin:0px;">ETCR2000系列鉗形接地電阻測試儀</strong></span><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">鉗表結(jié)構(gòu)</span></strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/E0/CgAGfFtW0V2AI5riAACRJGUUtdA582.png" style="margin:0px;padding:0px;max-height:100%;height:auto;width:249px;"></span></strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">1）. 鉗頭:65×32mm</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">2）. HOLD鍵：鎖定/解除顯示/存儲</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">3）. 扳機(jī)：控制鉗口張合</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">4）. ON/OFF鍵：開機(jī)/關(guān)機(jī)/退出/組合**數(shù)據(jù)</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">5）. MEM鍵：數(shù)據(jù)查閱鍵/組合**數(shù)據(jù)</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">6）. * 電阻測量切換鍵Ω/右箭頭鍵</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">7）. *電流測量切換鍵A/左箭頭鍵</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">8）. AL報警功能鍵：報警功能開啟/關(guān)閉/報警臨界值設(shè)定</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">9）. 液晶顯示屏</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">注：“*”**于C型。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">2. </strong></span><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;"> </strong></span>ETCR2000系列鉗形接地電阻測試儀<span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;"> 系列型號</strong></span></span> </p> <table border="1" cellpadding="0" cellspacing="0" class="ueditorTableStyle" style="margin:0px 0px 10px;border-spacing:0px;font-size:14px;background-color:#FFFFFF;-webkit-tap-highlight-color:rgba(0, 0, 0, 0);box-sizing:border-box;color:#888888;empty-cells:show;font-family:微軟雅黑;max-width:100%;outline:0px;padding:0px;text-size-adjust:none;width:853px;"> <tbody style="margin:0px;"> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">型號</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">電阻量程</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">電流量程</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">說明</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">ETCR2000+</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.01-1200Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">基礎(chǔ)型</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">ETCR2000A+</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.01-200Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">實用型</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">ETCR2000B+</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.01-1200Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">防爆型</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">ETCR2000C+</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.01-1200Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0-20A</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">多功能</span></span> </p> </td> </tr> </tbody> </table> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">3. </strong></span>ETCR2000鉗形接地電阻測試儀<span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">主要技術(shù)參數(shù)</strong></span></span> </p> <table border="1" cellpadding="0" cellspacing="0" class="ueditorTableStyle" style="margin:0px 0px 10px;border-spacing:0px;font-size:14px;background-color:#FFFFFF;-webkit-tap-highlight-color:rgba(0, 0, 0, 0);box-sizing:border-box;color:#888888;empty-cells:show;font-family:微軟雅黑;max-width:100%;outline:0px;padding:0px;text-size-adjust:none;width:853px;"> <tbody style="margin:0px;"> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">鉗口尺寸</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">65mm×32mm</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">鉗口張開尺寸</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">32mm</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">鉗表尺寸</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">長寬厚285mm×85mm×56mm</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td rowspan="2" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">鉗表質(zhì)量</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">1160g（含電池）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">(han</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td rowspan="10" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">電阻量程</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">測量范圍</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">分辨力</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">準(zhǔn)確度</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.010Ω-0.099Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.001Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（1%＋0.01Ω）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.10Ω-0.99Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.01Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（1%＋0.01Ω）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">1.0Ω-49.9Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.1Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（1%＋0.1Ω）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">50.0Ω-99.5Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.5Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（1.5%＋0.5Ω）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">100Ω-199Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">1Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（2%＋1Ω）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">200Ω-395Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">5Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（5%＋5Ω）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">400-590Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">10Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（10%＋10Ω）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">600Ω-880Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">20Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（20%＋20Ω）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">900Ω-1200Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">30Ω</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（25%＋30Ω）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td rowspan="6" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">電流量程</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.00mA -9.95mA</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.05mA</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（2.5%＋1mA）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">10.0mA -99.0mA</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.1mA</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（2.5%＋5mA）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">100mA -300mA</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">1mA</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（2.5%＋10mA）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.30A-2.99A</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.01A</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（2.5%＋0.1A）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">3.0A-9.9A</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.1 A</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（2.5%＋0.3A）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">10.0A-20.0A</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.1 A</span></span> </p> </td> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">±（2.5%＋0.5A）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">電源</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">6VDC（4節(jié)5號堿性干電池LR6）</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">換檔</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">全自動換檔</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">單次測量時間</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">0.5秒</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">液晶顯示器</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">4位LCD數(shù)字顯示，長寬47mm×28.5mm</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">數(shù)據(jù)存儲</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">99組</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">聲光報警</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">“嘟--嘟--嘟--”報警聲，按AL鍵開、關(guān)</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">報警臨界值設(shè)定范圍</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"> 電阻：1-199Ω；電流：1-499mA</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">防爆標(biāo)志</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">Exia Ⅱ BT3 Ga</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">計量制造許可證</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">粵制0000741號</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">企業(yè)**標(biāo)準(zhǔn)</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">Q/（GZ）YTDZ1-2007</span></span> </p> </td> </tr> <tr style="margin:0px;"> <td style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">隨機(jī)附件</span></span> </p> </td> <td colspan="3" style="margin:0px;padding:0px;"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">鉗表：1件；測試環(huán)：1件；電池LR6：4節(jié)；儀表箱： 1件</span></span> </p> </td> </tr> </tbody> </table> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">4. </strong></span>ETCR2000鉗形接地電阻測試儀<span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">電阻測量原理</strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">ETCR2000系列鉗表的基本原理是測量封閉回路的電阻。如下圖所示。鉗表在被測回路上感應(yīng)一個電勢E，在電勢E的作用下被測回路上產(chǎn)生一個電流I。鉗表對E及I進(jìn)行測量，并通過下面的公式即可得到被測電阻R：</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;text-align:center;"> <span style="margin:0px;font-size:16px;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/EE/CgAGfFtW3LeAdXWUAAAJBolo9CM802.png" style="margin:0px;padding:0px;max-height:100%;height:auto;width:133px;"><span style="margin:0px;color:#3F3F3F;"> </span><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/EE/CgAGfFtW3LiABngnAABVNk6YWZ4583.png" style="margin:0px;padding:0px;max-height:100%;height:auto;width:141px;"></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">因此，ETCR2000鉗表所測的接地電阻是接地極對地電阻以及接地線電阻的總和。它還可以測量回路的連接情況。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">我們在現(xiàn)場測量時必須注意被測裝置的接地是否形成回路。如果沒有回路，必須借助輔助地極和測試線也可以測出它的接地電阻值。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;"> </span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">5. </strong></span>ETCR2000鉗形接地電阻測試儀<span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">正確開機(jī)</strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">按下鉗表的POWER按鈕后，鉗表即處于開機(jī)自檢狀態(tài)。待液晶屏上顯示“OLΩ”后，自檢狀態(tài)結(jié)束。如鉗表未能顯示“OLΩ”，請按動鉗表手柄，讓鉗口張合兩次重新開機(jī)。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">因此，當(dāng)按下POWER按鈕后到液晶屏顯示“OLΩ”的這段時間內(nèi)（自檢時間約1秒），鉗表不可鉗繞任何金屬導(dǎo)體，不能翻轉(zhuǎn)鉗表，亦不可壓按鉗表的手柄和鉗口，應(yīng)使鉗表處于自然閉合的靜止?fàn)顟B(tài)。否則不能完成自檢，將對測量誤差帶來很大影響。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">開機(jī)出錯鉗表顯示“Er”開機(jī)出錯符號。</span><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/EF/CgAGfFtW3gaACpgbAAA3OqhOOSI377.png" style="margin:0px;padding:0px;max-height:100%;height:auto;width:135px;"></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">開機(jī)正確鉗表顯示“OLΩ”，用戶可以如右圖所示用隨機(jī)的測試環(huán)檢驗一下。鉗表顯示值應(yīng)該與測試環(huán)上的標(biāo)稱值一致（5.1Ω）。顯示值與標(biāo)稱值相差一個字，是正常的。如：測試環(huán)的標(biāo)稱值為5.1Ω時，顯示5.0Ω或5.2Ω都是正常的。用戶可放心使用。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">鉗表的具體操作方法請參考使用說明書。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;"> </span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">6. </strong></span>ETCR2000鉗形接地電阻測試儀<span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">在各種接地系統(tǒng)的應(yīng)用。</strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">一般情況下，我們將接地系統(tǒng)分為三種：多點接地系統(tǒng)、有限點接地系統(tǒng)、單點接地系統(tǒng)。下面介紹ETCR2000在這三種種接地系統(tǒng)的應(yīng)用</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">1</span></strong><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">）多點接地系統(tǒng)的應(yīng)用</span></strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">多點接地系統(tǒng)（例如輸電系統(tǒng)桿塔接地、通信電纜接地系統(tǒng)、某些建筑物等），它們通過架空地線（通信電纜的屏蔽層）連接，組成了多點接地系統(tǒng)。見下圖。當(dāng)用鉗表測量時，其等效電路如下：</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/F0/CgAGfFtW4EGAc2_eAACDiwEqJ2E196.png" style="margin:0px;padding:0px;max-height:100%;height:auto;width:400px;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/F0/CgAGfFtW4EKAQebXAABMAwZRwYA879.png" style="margin:0px;padding:0px;max-height:100%;height:auto;width:340px;"></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">其中：R1為待測的接地電阻。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">R0為所有其它桿塔的接地電阻并聯(lián)后的等效電阻。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">由于接地點數(shù)量很多，從工程角度設(shè)定R0=0。這樣，我們所測的電阻就應(yīng)該是R1了。多次不同環(huán)境、不同場合下與傳統(tǒng)方法進(jìn)行對比試驗，證明上述設(shè)定是完全正確的。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">對于多點接地系統(tǒng)，無需斷開接地引線，無需輔助地極，只需用ETCR2000+鉗表鉗住接地引線即可測出阻值。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">2）有限點接地系統(tǒng)的應(yīng)用</strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">有些桿塔接地系統(tǒng)是由數(shù)個桿塔通過架空地線彼此相連；某些建筑物的接地也不是一個獨立的接地網(wǎng)，而是幾個接地體通過導(dǎo)線彼此連接。這種3個以上10個以下的接地系統(tǒng)我們稱為有限點接地系統(tǒng)。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">這種情況也較普遍。在這種情況下，如果將上圖中的R0視為0則會對測量結(jié)果帶來較大誤差?？梢酝ㄟ^一組非線性方程組把阻值解算出來，但是人工解算它是十分困難的。為此，我公司提供了“有限點接地系統(tǒng)解算程序軟件”，用戶可在PC機(jī)上進(jìn)行機(jī)解。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;text-align:center;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;"><img src="https://0.rc.xiniu.com/g2/M00/B6/F1/CgAGfFtW4VKASxT0AAE9Y-HzKBI512.jpg" style="margin:0px;padding:0px;max-height:100%;width:800px;height:auto !important;"></strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">3）單點接地系統(tǒng)的應(yīng)用</strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">從測試原理來說，ETCR2000系列鉗表只能測量回路電阻，對單點接地是測不出來的。但是，用戶完全可以利用一根測試線及接地系統(tǒng)附近的接地極，人為地制造一個回路進(jìn)行測試。下面介紹二種用鉗表測量單點接地的方法，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ETCR2000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。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">（</span></strong><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">a</span></strong><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">）．</span></strong><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">二點法</span></strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">見下圖，在被測接地體RA附近找一個獨立的接地較好的接地體RB（例如臨近的自來水管、建筑物等）。將RA和RB用一根測試線連接起來。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D0/CgAGe1tW4R6ARGVDAAB-dY1NmF0340.png" style="margin:0px;padding:0px;max-height:100%;height:auto;width:573px;"></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">由于鉗表所測的阻值是兩個接地電阻和測試線阻值的串聯(lián)值：RT=RA+RB+RL</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">其中：RT為鉗表所測的阻值。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">RL為測試線的阻值。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">將測試線頭尾相連即可用鉗表測出其阻值RL。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">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></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">（</span></strong><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">b</span></strong><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">）．</span></strong><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">三點法</span></strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">三點法可以準(zhǔn)確測算出接地極的阻值。如下圖，在被測接地體RA附近找二個獨立的接地體RB和RC。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">di一步，將RA和RB用一根測試線連接起來，見下圖。用鉗表讀得di一個數(shù)據(jù)R1。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D4/CgAGe1tW4_eAFZH5AABydVa5mp0909.png" style="margin:0px;padding:0px;max-height:100%;height:auto;width:398px;"></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">**步，將RB和RC連接起來，見下圖。用鉗表讀得**個數(shù)據(jù)R2。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"> </span><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D5/CgAGe1tW5FGAFNqcAAB0ab3DK54104.png" style="margin:0px;padding:0px;max-height:100%;height:auto;width:397px;"></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">第三步，將RC和RA連接起來，見下圖。用鉗表讀得第三個數(shù)據(jù)R3。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D5/CgAGe1tW5HOAB3sFAABtzXYYdIk075.png" style="margin:0px;padding:0px;max-height:100%;height:auto;width:399px;"></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">上面三步中，每一步所測得的讀數(shù)都是兩個接地電阻的串聯(lián)值。這樣，就可以很容易地計算出每一個接地電阻值：</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">由于： R1=RA+RB R2=RB+RC R3=RC+RA</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">所以： RA=（R1+R3-R2）÷2</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">這就是接地體RA的接地電阻值。為了便于記憶上述公式，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減對邊電阻除以2。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">其它兩個作為參照物的接地體的接地電阻值為：</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">RB=R1-RA RC=R3-RA</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">7. 電力系統(tǒng)的應(yīng)用</strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">(1) 輸電線桿塔接地電阻的測量：</strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">通常輸電線路桿塔接地構(gòu)成多點接地系統(tǒng)，只需用ETCR鉗表鉗住接地引下線，即可測出該支路的接地電阻阻值。（請見下圖）</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"> </span><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D5/CgAGe1tW5aaADNysAABMY41dKeM113.png" style="margin:0px;padding:0px;max-height:100%;height:auto;width:560px;"></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">注：測試時如鉗表顯示“L 0.01Ω”，說明同一個桿塔有兩根接地引下線并在地下連接，測試時應(yīng)將另一根引線解扣。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">(2) 變壓器中性點接地電阻的測量</strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">變壓器中性點接地有二種情形：如有重復(fù)接地則構(gòu)成多點接地系統(tǒng)；如無重復(fù)接地按單點接地測量。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">(3) 發(fā)電廠變電所的應(yīng)用</strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">ETCR2000鉗表可以測試回路的接觸情況和連接情況。借助一根測試線，可以測量站內(nèi)裝置與地網(wǎng)的連接情況。接地電阻可按單點接地測量。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">8. 電信系統(tǒng)的應(yīng)用</strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">（1）樓層機(jī)房接地電阻的測量</strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">電信系統(tǒng)的機(jī)房往往設(shè)在樓房的上層，使用搖表測量非常困難。而用ETCR2000鉗表測試則非常方便，用一根測試線連接消防栓和被測接地極（機(jī)房內(nèi)都設(shè)有消防栓），然后用鉗表測量測試線。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">鉗表阻值 = 機(jī)房接地電阻 + 測試線阻值 + 消防栓接地電阻</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">如果消防栓接地電阻很小，則：</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;">機(jī)房接地電阻 ≈ 鉗表阻值 - 測試線阻值</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;"><span style="margin:0px;font-family:微軟雅黑, sans-serif;">（2）機(jī)房、發(fā)射塔接地電阻的測量</span></strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">機(jī)房、發(fā)射塔接地通常構(gòu)成二點接地系統(tǒng)，如下圖。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D5/CgAGe1tW5qqAXVvBAABQN96jSuE981.png" style="margin:0px;padding:0px;max-height:100%;height:auto;width:390px;"></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">如果鉗表的測量值小于接地電阻的允許值，那么機(jī)房、發(fā)射塔的接地電阻都是合格的。如果鉗表的測量值大于允許值，請按單點接地進(jìn)行測量。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;"><strong style="margin:0px;">9. 建筑物接地系統(tǒng)的應(yīng)用</strong></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">如果建筑物的各接地極是獨立的，各接地極的接地電阻測量請見下圖。</span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D8/CgAGe1tW6JeAR8AVAABZh-CXr_A269.png" style="margin:0px;padding:0px;max-height:100%;height:auto;width:401px;"></span></span> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#555555;font-family:Tahoma;font-size:14px;background-color:#FFFFFF;"> <span style="margin:0px;font-size:16px;"><span style="margin:0px;color:#3F3F3F;font-family:微軟雅黑, sans-serif;">如果建筑物的各接地極在地下是連接的，測量的是金屬回路的阻值。接地電阻測量請參考單點接地的測量。</span></span> </p> </div> <div id="pr3mjyzo" class="datumrelate"> <span>下一篇：</span> <a href="/kangdengdq_Article_11598827.html" title="QJ36B-2型數(shù)字電阻電橋">QJ36B-2型數(shù)字電阻電橋</a> <br> <span>上一篇：</span> <a href="/kangdengdq_Article_11598829.html" title="防電弧服大袍系列">防電弧服大袍系列</a> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> <footer id="footer" class="footer" data-appid="layout"> <div class="pr3mjyzo" id="footerWrapper" 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