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title="壓敏電阻測試儀">壓敏電阻測試儀</a></li> </div> </ul> </ul> </div> <div id="5hlvxzllpl3" class="page-right"> <div id="5hlvxzllpl3" class="onurl"> <a href="/"><img src="/Skins/333987/images/home.png"></a><a href="/">網(wǎng)站首頁</a>><a href="/article.html">技術(shù)文章</a> > 電氣系統(tǒng)中絕緣電阻、直流電阻、接地電阻和接觸電阻的概念和區(qū)別是什么</div> <div id="5hlvxzllpl3" class="page-news"> <div id="5hlvxzllpl3" class="newshowheader"> <h1 class="nd_title">電氣系統(tǒng)中絕緣電阻、直流電阻、接地電阻和接觸電阻的概念和區(qū)別是什么</h1> <div id="5hlvxzllpl3" class="article-info"> <span> 瀏覽：</span> 1506<span id="5hlvxzllpl3" class="split">|</span> <span id="publishtime">更新時間：2022-06-14</span> <span id="5hlvxzllpl3" class="split">|</span> </div> </div> <div id="5hlvxzllpl3" class="page-newshow"> <p><span style="font-size: 16px;"><strong>電氣系統(tǒng)中絕緣電阻、直流電阻、接地電阻和接觸電阻的概念和區(qū)別是什么</strong></span><br/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">什么是<span style="margin: 0px; padding: 0px; border: 0px; font: inherit; vertical-align: baseline; box-sizing: border-box;">絕緣電阻</span>？</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　絕緣電阻：對電介質(zhì)施加直流電壓。經(jīng)過一定時間的極化后，相應(yīng)的流過電介質(zhì)的漏電流稱為絕緣電阻。</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　絕緣電阻是電氣設(shè)備和電氣線路最基本的絕緣指標(biāo)。低壓電氣裝置交接試驗(yàn)，電機(jī)、配電設(shè)備和配電線路在常溫下的絕緣電阻不小于0.5MΩ（操作設(shè)備和接線的絕緣電阻不小于1兆歐/千伏）。低壓電器及其連接電纜和二次電路的絕緣電阻一般不應(yīng)低于1MΩ；在比較潮濕的環(huán)境中，不應(yīng)低于0.5MΩ；小回路小母線的絕緣電阻不低于10MΩ。I類手持式電動工具的絕緣電阻不應(yīng)小于2MΩ。</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　接地電阻是多少？</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　接地電阻是電流從接地裝置流入大地，然后通過大地流向另一個接地體或傳播到遠(yuǎn)處時所遇到的電阻。測量單位是Ω。接地電阻的大小可以反映用電裝置與大地的接觸程度，反映接地網(wǎng)的規(guī)模。</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　接地電阻測量方法包括兩線法、三線法、四線法、單鉗法和雙鉗法。這五種方法中的每一種都有自己的特點(diǎn)。實(shí)際測量時，盡量選擇正確的方法和測量儀進(jìn)行測量。結(jié)果是準(zhǔn)確的。</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　什么是直流繞組電阻？</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　直流電阻主要用于變壓器、電機(jī)、CT/PT等感性負(fù)載的直流電阻測試，測量單位為mΩ。例如，變壓器繞組直流電阻的測量是調(diào)查繞組絕緣和電流回路的連接情況的一種方便有效的試驗(yàn)。它可以反映繞組的焊接質(zhì)量、繞組匝間短路、繞組斷線或引線斷線、分接開關(guān)和導(dǎo)線接觸不良等故障，其實(shí)也是一種有效的手段判斷各相繞組直流電阻是否平衡，調(diào)壓開關(guān)檔位是否正確。</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　直流電阻測量方法有：電流電壓法、直流電橋法、三相繞組同時壓縮法?，F(xiàn)在直流電阻測試儀都采用直流電橋法，要求測試電流不小于1A，測量電阻值很小。高測試電流很常見：1A、3A、10A、20A、40A、50A、100A，這些僅用于單相測量。</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　什么是接觸電阻？</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　接觸電阻是表征導(dǎo)電回路的連接是否良好的參數(shù)，計量單位為μΩ。每種類型的高壓斷路器都了一個值范圍。如果回路電阻超過規(guī)定值，很可能是導(dǎo)電回路的連接不良。在大電流操作的情況下，接觸故障時的局部溫升會增加。嚴(yán)重時甚至惡性循環(huán)造成氧化燒損，大電流運(yùn)行所用的斷路器更需注意。</p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);">　　接觸電阻測量、電橋法測量、直流電壓降法測量是不允許的。并且測試電流大于等于100A。接觸電阻測試儀用于測量高壓開關(guān)、有載開關(guān)等開關(guān)設(shè)備的接觸電阻，可以直接反映開關(guān)觸點(diǎn)的接觸情況。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "PingFang SC", Helvetica, "Microsoft YaHei", Arial, sans-serif; white-space: normal;"><span style="font-family: 宋體; font-size: 12px;"><span style="font-size: 16px;">我們的理念：“誠信為本、實(shí)力為先，全心全意為客戶"，公司秉承客戶至上、服務(wù)至上的經(jīng)營理念，以<span style="color:#ff0000"> </span>的服務(wù)品質(zhì)、專業(yè)的技術(shù)服務(wù)實(shí)力、技術(shù)*的客戶服務(wù)團(tuán)隊，保障客戶在信息時代的高速路上馳騁，又以穩(wěn)固、發(fā)展、忠誠、高效、團(tuán)結(jié)與創(chuàng)新的精神，尊重人才注重技術(shù)，使客戶在享受信息科技發(fā)展成果的同時不斷獲收益</span>。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "PingFang SC", Helvetica, "Microsoft YaHei", Arial, sans-serif; white-space: normal;"><span style="font-family: 宋體; font-size: 12px;">我們的質(zhì)量方針：以客戶需求為宗旨，以科技創(chuàng)新為動力，以嚴(yán)格管理為保證，以水平為目標(biāo)，為廣大客戶提供滿意的產(chǎn)品和服務(wù)。我們的價值觀：團(tuán)結(jié)和睦、志同道合、誠實(shí)守信、尊崇創(chuàng)新、嚴(yán)謹(jǐn)守紀(jì)、追求</span></p><p style="margin-top: 18px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px; font-family: Arial, "Microsoft YaHei", 黑體, sans-serif, Tahoma; vertical-align: baseline; box-sizing: border-box; color: rgb(51, 51, 51); text-align: justify; background-color: rgb(255, 255, 255);"><br/></p> </div> 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