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"font-variant-numeric:normal;font-variant-east-asian:normal;text-align:justify;white-space:normal;max-width:100%;min-height:1em;font-size:15px;letter-spacing:0.544px;widows:1;-webkit-tap-highlight-color:transparent;line-height:28px;color:#657180;background-color:#FFFFFF;box-sizing:border-box !important;";"><span style="font-size:16px"><span style="color:rgb(51, 51, 51); font-family:-apple-system-font,blinkmacsystemfont,font-size:17px; text-align:justify; text-indent:2em; white-space:normal">接地電阻就是電流由接地裝置流入大地再經(jīng)大地流向另一接地體或向遠(yuǎn)處擴散所遇到的電阻，它包括接地線和接地體本身的電阻，接地體與大地的電阻之間的接觸電阻以及兩接地體之間大地的電阻或接地體到無限遠(yuǎn)處的大地電阻。接地電阻大小直接體現(xiàn)了電氣裝置與“地”接觸的良好程度，也放映了接地網(wǎng)的規(guī)模。在單點接地系統(tǒng)，干擾性強等條件下，可以采用打輔助地級的測量方式進(jìn)行測量。接地電阻主要分以下三種：</span></span></p><p style="box-sizing: border-box; margin: 0px 0px 20px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; color: rgb(136, 136, 136); font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-variant-numeric:normal;font-variant-east-asian:normal;text-align:justify;white-space:normal;max-width:100%;min-height:1em;font-size:15px;letter-spacing:0.544px;widows:1;-webkit-tap-highlight-color:transparent;line-height:28px;color:#657180;background-color:#FFFFFF;text-indent:2em;box-sizing:border-box !important;";"><span style="font-size:16px"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box !important; color:rgb(0, 0, 0); margin:0px; max-width:100%; outline:0px; padding:0px; text-size-adjust:none; word-wrap:break-word !important">1.保護(hù)接地：電氣設(shè)備的金屬外殼，混凝土、電桿等，由于絕緣損壞有可能帶電，為了防止這種情況危及人身安全而設(shè)的接地。</span></span></p><p style="box-sizing: border-box; margin: 0px 0px 20px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; color: rgb(136, 136, 136); font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-variant-numeric:normal;font-variant-east-asian:normal;text-align:justify;white-space:normal;max-width:100%;min-height:1em;font-size:15px;letter-spacing:0.544px;widows:1;-webkit-tap-highlight-color:transparent;line-height:28px;color:#657180;background-color:#FFFFFF;box-sizing:border-box !important;";"><span style="font-size:16px"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box !important; color:rgb(0, 0, 0); margin:0px; max-width:100%; outline:0px; padding:0px; text-size-adjust:none; word-wrap:break-word !important">2.防靜電接地：防止靜電危險影響而將易燃油、天然氣貯藏罐和管道、電子設(shè)備等的接地。</span></span></p><p style="box-sizing: border-box; margin: 0px 0px 20px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; color: rgb(136, 136, 136); font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-variant-numeric:normal;font-variant-east-asian:normal;text-align:justify;white-space:normal;max-width:100%;min-height:1em;font-size:15px;letter-spacing:0.544px;widows:1;-webkit-tap-highlight-color:transparent;line-height:28px;color:#657180;background-color:#FFFFFF;box-sizing:border-box !important;";"><span style="font-size:16px"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box !important; color:rgb(0, 0, 0); margin:0px; max-width:100%; outline:0px; padding:0px; text-size-adjust:none; word-wrap:break-word !important">3.防雷接地：為了將雷電引入地下，將防雷設(shè)備（避雷針等）的接地端與大地相連，以消除雷電過電壓對電氣設(shè)備、人身財產(chǎn)的危害的接地，也稱過電壓保護(hù)接地。</span></span></p><p style="box-sizing: border-box; margin: 0px 0px 20px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; color: rgb(136, 136, 136); font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-variant-numeric:normal;font-variant-east-asian:normal;text-align:justify;white-space:normal;max-width:100%;min-height:1em;font-size:15px;letter-spacing:0.544px;widows:1;-webkit-tap-highlight-color:transparent;line-height:28px;color:#657180;background-color:#FFFFFF;box-sizing:border-box !important;";"><span style="font-size:16px"><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box !important; color:rgb(0, 0, 0); font-variant-east-asian:normal; font-variant-numeric:normal; font-weight:bold; letter-spacing:0.544px; line-height:25px; margin:0px; max-width:100%; outline:0px; overflow-wrap:break-word !important; padding:0px; text-size-adjust:none">1.單鉗法(<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; margin:0px; outline:0px; padding:0px; text-align:center; text-size-adjust:none">推薦設(shè)備型號：ETCR2000系列)</span></strong></span></p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;white-space:normal;text-align:center;";"><span style="font-size:16px"><img alt="" src="http://res.etcr.com.cn/yitai/2019-05-08/1557284460768" style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); border:0px none; box-sizing:border-box; height:auto; max-width:100%; outline:0px; text-size-adjust:none; vertical-align:top" /></span></p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;text-align:justify;white-space:normal;text-indent:24px;";"><span style="font-size:16px"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">鉗形接地電阻儀測量接地電阻的基本原理是測量回路電阻。</span><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">見下圖</span><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">。鉗表的鉗口部分由電壓線圈及電流線圈組成。電壓線圈提供激勵信號，并在被測回路上感應(yīng)一個電勢</span>E<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">。在電勢</span>E<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">的作用下將在被測回路產(chǎn)生電流</span>I<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">。鉗表對</span>E<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">及</span>I<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">進(jìn)行測量，并通過下面的公式即可得到被測電阻</span>R<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">。</span></span></p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;text-align:justify;white-space:normal;text-indent:114px;";"><span style="font-size:16px">R=E/I</span></p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;white-space:normal;text-align:center;";"><span style="font-size:16px"><img alt="" src="http://res.etcr.com.cn/yitai/2019-05-08/1557284490017" style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); border:0px none; box-sizing:border-box; height:auto; max-width:100%; outline:0px; text-size-adjust:none; vertical-align:top" /></span></p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;text-align:justify;text-indent:0em;white-space:normal;";"><span style="font-size:16px"><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">2.</span></strong><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">二、三<strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; margin:0px; outline:0px; padding:0px; text-size-adjust:none">、四</span></strong>線法（推薦型號ETCR3000系列）</span></strong></span></p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;white-space:normal;text-align:center;";"><span style="font-size:16px"><img alt="" src="http://res.etcr.com.cn/yitai/2019-05-08/1557284516636" style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); border:0px none; box-sizing:border-box; height:auto; max-width:100%; outline:0px; text-size-adjust:none; vertical-align:top" /></span></p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;text-align:justify;white-space:normal;text-indent:24px;";"> </p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;text-align:justify;white-space:normal;text-indent:24px;";"><span style="font-size:16px"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">三線法四線法測量接地電阻值測量采用額定電流變極法</span>(<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">適合準(zhǔn)確測量單點接地系統(tǒng)</span>)<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">，即在測量對象</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">E</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">接地極</span><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">和</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">C</strong><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; margin:0px; outline:0px; padding:0px; text-size-adjust:none">(H)</span></strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">電流極</span><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">之間流動交流額定電流</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">I</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">，求取</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">E</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">接地極</span><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">和</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">P</strong><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; margin:0px; outline:0px; padding:0px; text-size-adjust:none">(S)</span></strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">電壓極</span><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">的電位差</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">V</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">，并根據(jù)公式</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">R=V/I</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">計算接地電阻值</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">R</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">。為了保證測試的精度，采用</span>4<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">線法，增加</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">ES</strong><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">輔助地極</span></strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">，實際測試時</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">ES</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">與</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">E</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">夾在接地體的同一點上。</span></span></p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;white-space:normal;text-align:center;";"><span style="font-size:16px"><img alt="" src="http://res.etcr.com.cn/yitai/2019-05-08/1557284562881" style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); border:0px none; box-sizing:border-box; height:auto; max-width:100%; outline:0px; text-size-adjust:none; vertical-align:top" /></span></p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;text-align:justify;text-indent:0em;white-space:normal;";"><span style="font-size:16px"><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">3</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-indent:0em; text-size-adjust:none">．<strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">雙鉗法（推薦型號ETCR3200系列）</strong></span></span></p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;text-align:justify;white-space:normal;";"> </p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;text-align:justify;white-space:normal;";"><span style="font-size:16px"><img alt="" src="http://res.etcr.com.cn/yitai/2019-05-08/1557284580301" style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); border:0px none; box-sizing:border-box; height:auto; max-width:100%; outline:0px; text-size-adjust:none; vertical-align:top" /></span></p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;text-align:justify;white-space:normal;text-indent:24px;";"><span style="font-size:16px"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">雙鉗法測量接地電阻值</span>(<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">適用于多獨立點并聯(lián)接地系統(tǒng)不打輔助地樁測量</span>)<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">，通過激勵鉗</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">CT1</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">產(chǎn)生一個交流電動勢</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">V</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">，在交流電動勢</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">V</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">的作用下在回路中產(chǎn)生電流</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">I</strong>,<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">再通過</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">CT2</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">檢測到反饋的電流</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">I</strong>,<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">并根據(jù)公式</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">R=V/I</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">計算出電阻值</span>,<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">圖中</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">R=Re+R1//R2//R3//…Rn</strong><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; margin:0px; outline:0px; padding:0px; text-size-adjust:none">-1</span>//Rn</strong>,<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">當(dāng)</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">R1//R2//R3//…Rn</strong><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; margin:0px; outline:0px; padding:0px; text-size-adjust:none">-1</span>//Rn</strong>(<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">多個接地點并聯(lián)后的阻值</span>)<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">遠(yuǎn)小于</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">Re</strong>,<span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">有</span><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none">R</strong><strong style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; outline:0px; text-size-adjust:none"><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">≈</span>Re</strong><span style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); box-sizing:border-box; font-family:宋體; margin:0px; outline:0px; padding:0px; text-size-adjust:none">。</span></span></p><p style="box-sizing: border-box; margin: 0px; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); padding: 0px; font-size: 14px; clear: both; font-family: -apple-system-font, BlinkMacSystemFont, "font-size:17px;white-space:normal;text-align:center;";"><span style="font-size:16px"><img alt="" src="http://res.etcr.com.cn/yitai/2019-05-08/1557284666185" style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0); border:0px none; box-sizing:border-box; height:auto; max-width:100%; outline:0px; text-size-adjust:none; vertical-align:top" 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轉(zhuǎn)速表</a></li> <li><a href="/SonList-1324115.html">> 測溫儀</a></li> </ul> </div> </li> <li><a href="/ParentList-1349465.html" onmouseover="showsubmenu('避雷器及絕緣子測試儀器')" class="yj">避雷器及絕緣子測試儀器</a> <div class="ubjn47ipz" id="submenu_避雷器及絕緣子測試儀器" style="display:none"> <ul> <li><a href="/SonList-1349472.html">> 無線絕緣子測試儀</a></li> <li><a href="/SonList-1349471.html">> 避雷器放電計數(shù)器校驗儀</a></li> <li><a href="/SonList-1349470.html">> 氧化鋅避雷器在線測試儀</a></li> <li><a href="/SonList-1349469.html">> 絕緣子串電壓分布測量表</a></li> <li><a href="/SonList-1349468.html">> 絕緣子絕緣電阻測試儀</a></li> <li><a href="/SonList-1349467.html">> 氧化鋅避雷器特性測試儀</a></li> <li><a href="/SonList-1349466.html">> 氧化鋅避雷器檢測儀</a></li> </ul> </div> </li> <li><a href="/ParentList-1346337.html" onmouseover="showsubmenu('滑動變阻器')" class="yj">滑動變阻器</a> <div class="ubjn47ipz" id="submenu_滑動變阻器" style="display:none"> <ul> <li><a href="/SonList-1346340.html">> 滑動變阻器</a></li> <li><a href="/SonList-1346339.html">> 雙管滑線滑動變阻器</a></li> <li><a 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