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href="/article.html">技術(shù)文章</a> > 回路電阻測試儀【上?？档请姎狻肯嚓P(guān)知識說明</div> <div id="pvhr3jx3r5" class="inpage_content"> <div id="pvhr3jx3r5" class="nr_main_box"> <h1 class="inside_rnewtil">回路電阻測試儀【上?？档请姎狻肯嚓P(guān)知識說明</h1> <div id="pvhr3jx3r5" class="inside_rnewtime">點(diǎn)擊次數(shù)：605 更新時間：2023-08-11</div> <div id="pvhr3jx3r5" class="inside_rnewcon"><p><span style="font-size: 16px;"><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;"><strong style="list-style: none; margin: 0px; padding: 0px;">回路電阻測試儀【上?？档请姎狻肯嚓P(guān)知識說明</strong></span></span></p><p><span style="font-size: 16px;"><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;"><strong style="list-style: none; margin: 0px; padding: 0px;">回路電阻測試儀</strong>是上海康登電氣電氣采用*的大功率開關(guān)電源技術(shù)和*的電子線路精制而成，是高、低開關(guān)、電纜電線及焊縫接觸電阻的專用測試儀器。這句話概括講述了回路電阻測試儀的用途。但我們在實際使用該儀器過程中，會遇到一些相關(guān)知識。</span></span></p><p><span style="font-size: 16px;"></span></p><p style="text-align: center"><img style="max-width: 800px; max-height: 300%; width: 396.725px; height: 547px;" src="https://img64.chem17.com/9/20230515/638197334268506883515.jpg" alt="638197334268506883515.jpg" width="396" height="547"/></p><p><span style="font-size: 16px;"><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;"><strong style="list-style: none; margin: 0px; padding: 0px;">回路電阻測試儀</strong>相關(guān)知識說明：</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">1、接觸電阻是什么？</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">接觸電阻是靜觸頭與動觸頭相互接觸時所出現(xiàn)的附加電阻。</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">2、斷路器接觸電阻有哪幾部分組成？</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">由動、靜觸頭接觸部分的收縮電阻和表面電阻兩部分組成。</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">3、斷路器接觸電阻不合格的原因？</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">a.開斷較大短路電流時觸頭燒壞。</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">b.因機(jī)構(gòu)調(diào)整不佳固定不牢，致使行程變化，當(dāng)超行程嚴(yán)重不合格時，引起接觸壓力或接觸面積的變化。</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">c.斷路器調(diào)試安裝完后，長期未投入運(yùn)行，使動，靜觸頭表面氧化，接觸表面電阻增大。</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">d.長期運(yùn)行使彈簧變形，使接觸壓力下降。</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">e.機(jī)械部分長期操作后引起的機(jī)械磨損。</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">f.對少油斷路器，還可能因絕緣油酸值不合格呈酸性反應(yīng)，浸蝕觸頭表面?；蛴椭衅‰s質(zhì)，動、靜觸頭之間因開斷短路電流后殘留的微粒碳質(zhì)、金屬粉末，使接觸電阻增大。</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">4、影響接觸電阻的因素？</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">a.材料性質(zhì)：硬度、化學(xué)性質(zhì)、金屬化合物的機(jī)械強(qiáng)度與電阻率。</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">b.接觸形式：點(diǎn)接觸、線接觸、面接觸。</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">c.接觸面狀況：當(dāng)接觸面形成氧化膜時（銀例外），氧化膜比金屬本身的電阻要大得多。</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif;">d.接觸壓力。</span><br style="list-style: none; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "Microsoft YaHei", sans-serif; white-space: normal;"/><span style="list-style: none; margin: 0px; padding: 0px; color: 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