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onmouseover="showsubmenu('高壓核相儀')">高壓核相儀</a> <div class="ihno5c4uhq" id="submenu_高壓核相儀" style="display:none"> <ul> </ul> </div> </li> </ul> </div> </div></div> <div id="ihno5c4uhq" class="inpage_right"> <div id="ihno5c4uhq" class="mbx2"><a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > 淺談直流系統(tǒng)接地故障測試儀優(yōu)點工作原理</div> <div id="ihno5c4uhq" class="inpage_content"> <div id="ihno5c4uhq" class="nr_main_box"> <h1 class="inside_rnewtil">淺談直流系統(tǒng)接地故障測試儀優(yōu)點工作原理</h1> <div id="ihno5c4uhq" class="inside_rnewtime">點擊次數(shù)：1860 更新時間：2016-12-23</div> <div id="ihno5c4uhq" class="inside_rnewcon"><p> <span style="font-size:16px">淺談直流系統(tǒng)接地故障測試儀優(yōu)點工作原理？</span></p><p><span style="font-size:16px"> 直流系統(tǒng)接地故障測試儀形分析法，就是利用在直流母線與地之間加入一種特定的周期性電壓信號， KD-9801直流系統(tǒng)接地故障測試儀通過卡鉗式探頭探測各支路電流，分析、計算電流信號基波與諧波的相位及相位差，進(jìn)而判斷是否存在接地故障及接地故障點</span></p><p><span style="font-size:16px">KD-9801直流系統(tǒng)接地故障測試儀<span style="line-height:1.6em">與國內(nèi)外同類型的儀器相比具有以下優(yōu)點：</span></span></p><p><span style="font-size:16px">1、使用簡單。本儀器只需打開電源開關(guān)就可直接使用,無需別的按鍵操作。<br />2、安全可靠。本儀器無需停浮充電機(jī)及其它一切電源，對直流系統(tǒng)沒有任何影響。<br />3、適用電壓等級多。直流系統(tǒng)220V、110V、48V、24V都可以使用。<br />4、適用范圍廣。任何類型電廠、變電站、煤礦、化工廠等供電部門都可使用。<br />5、攜帶方便，信號接收器自帶充電電池，無需外接電源，可以隨身攜帶到任何地方查找接地點。</span></p><p><span style="font-size:16px">6、直流系統(tǒng)不斷電查找接地點，不影響系統(tǒng)正常工作。</span></p><p><span style="font-size:16px">7、抗干擾能力強，克服了系統(tǒng)分布電容的影響。</span></p><p><span style="font-size:16px">8、智能化充電管理，減少充電時間，延長電池壽命。</span></p><p><span style="font-size:16px">KD-9801直流系統(tǒng)接地故障測試儀</span></p><h2><span style="font-size:16px">一、工作原理</span></h2><p><span style="font-size:16px">KD9801用于在不斷電情況下查找發(fā)電廠、變電站直流系統(tǒng)接地點的準(zhǔn)確位置。該儀器在原理上引入一種全新的探測方法----波形分析法，其主要特點和優(yōu)點：檢測靈敏度高、排查系統(tǒng)分布電容能力強、不斷電查找、不影響系統(tǒng)正常運行、抗干擾能力強、安全可靠等。</span></p><p><span style="font-size:16px">波形分析法，就是利用在直流母線與地之間加入一種特定的周期性電壓信號，通過卡鉗式探頭探測各支路電流，分析、計算電流信號基波與諧波的相位及相位差，進(jìn)而判斷是否存在接地故障及接地故障點。</span></p><p><span style="font-size:16px">2. 1 裝置的構(gòu)成：本裝置由信號發(fā)生器、信號接收器和信號采集器（卡鉗）三部分組成。在查找直流系統(tǒng)故障時，三者須同時配合使用。</span></p><p><span style="font-size:16px">1、信號發(fā)生器的原理：<br />本信號發(fā)生器不采用傳統(tǒng)的LC或RC的振蕩電路，而采用全新的數(shù)字技術(shù)，因而具有信號穩(wěn)定的特點。該信號發(fā)生器由單片機(jī)、A/D轉(zhuǎn)換電路、信號放大濾波電路、功率放大及隔直電路、輸出反饋及保護(hù)等部分組成，其實現(xiàn)原理圖如下：</span></p><p><span style="font-size:16px"><span style="line-height:1.6em">KD-9801直流系統(tǒng)接地故障測試儀</span><span style="line-height:1.6em"> 、</span></span></p><p><span style="font-size:16px"><span style="line-height:1.2em">二、技術(shù)指標(biāo)</span></span></p><p><span style="font-size:16px"><span style="line-height:1.6em">1、信號發(fā)生器</span></span></p><p><span style="font-size:16px">l 輸出信號頻率：2Hz</span></p><p><span style="font-size:16px">l 信號空載輸出電壓：±15V±5%</span></p><p><span style="font-size:16px">l 信號電壓幅值誤差：<5%</span></p><p><span style="font-size:16px">l 信號短路輸出電流：≤80mA</span></p><p><span style="font-size:16px">l 輸出口抗沖擊能力：400V直流沖擊</span></p><p><span style="font-size:16px">l 電源電壓：AC220V±10% </span></p><p><span style="font-size:16px">l 電壓頻率：50Hz±5%</span></p><p><span style="font-size:16px">l 輸入保險：200mA</span></p><p><span style="font-size:16px">l zui大功率：2W</span></p><p><span style="font-size:16px">l 體積：275×225×100mm</span></p><p><span style="font-size:16px">KD-9801直流系統(tǒng)接地故障測試儀</span></p><p><span style="font-size:16px">2、信號接收器</span></p><p><span style="font-size:16px">l 信號電流檢測靈敏度：0.5mA</span></p><p><span style="font-size:16px">l 信號發(fā)生器阻抗：40KW</span></p><p><span style="font-size:16px">l zui大輸出電流：2.5毫安</span></p><p><span style="font-size:16px">l 接收器顯示：數(shù)字0-19</span></p><p><span style="font-size:16px">l 體積：195×100×30mm</span></p><p><span style="font-size:16px">l 體積：38×69×30mm</span></p></div> <div id="ihno5c4uhq" class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a 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