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class="h-6">技術(shù)文章<span>您當(dāng)前的位置：<a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > 分流器FL2分流器定義</span></div>  <div id="yq00aqiue" class="n-3 c-news"> <div id="yq00aqiue" class="newsnr"> <h1>分流器FL2分流器定義</h1> <p class="source"><span>日期：2019-10-02</span><span>瀏覽：1826次</span></p> <div> <p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);"><strong style="margin:0px">分流器FL-2分流器定義：</strong></p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);"><strong style="margin:0px"><img alt="" src="http://img65.chem17.com/9/20170825/636392504071277494651.png" style="border:0px; height:213px; margin:0px; padding:0px; width:298px" /></strong></p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">分流器實際就是一個阻值很小的電阻，當(dāng)有直流電流通過時，產(chǎn)生壓降，供直流電流表顯示；</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">　　直流電流表實際是電壓表，滿度值75mV；</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">　　直流電流表和分流器是配套使用的；</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">　　比如：100A電流表配套的分流器阻值為0.00075歐；</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">　　即100A*0.00075歐=75mV；</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">　　50A電流表配套的分流器阻值為0.0015歐；</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">50A*0.0015歐=75mV。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);"><img alt="" src="http://img69.chem17.com/9/20191002/637056285956008821889.jpg" style="height:321px; width:467px" /></p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);"><strong style="margin:0px">二，測量：</strong></p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">　　要測量一個很大的直流電流，例如幾十安培，甚至更大，幾百安培，沒有那么大量程的電流表進行電流的測量，怎么辦？這就要采用分流器.分流器是一個可以通過大電流的電阻，當(dāng)電流流過分流器時，在它的兩端就會出現(xiàn)一個毫伏級的電壓，于是用毫伏電壓表來測量這個電壓，再將這個電壓換算成電流.就完成了大電流的測量。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">　　電流表有多種不同規(guī)格，但是實際表頭卻是標(biāo)準(zhǔn)的毫伏電壓表。比如是一種滿刻度為75mv的電壓表。那么用這塊電壓表測量比如20A的電流，就需要給它配一個在流過20A電流時候產(chǎn)生75mv電壓降的分流電阻，也稱75mv分流器。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">　　分流器就是一個能夠通過極大電流的電阻一般常用的1或20A以及3的電流表都需要分流器，分流器的阻抗=表頭標(biāo)志滿度電壓/表頭滿度電流。比如20A的電流表的分流器阻值=75mv*10-3/20A=0.00375Ω，阻抗恒定后根據(jù)歐姆定律U=IR，電流與電壓成正比，電流為線形電壓也呈線形，所以就可以用一個滿度為75mv的電壓表顯示當(dāng)前電流。因此，使用的電流表實際是一塊電壓表。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">　　交流大電流怎么測量呢?采用電流互感器，將大電流以一定變比變成5安培以下的小電流，于是用小量程交流電流表就可測量大電流了，只是測得的電流還要乘那個變比。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">　　就是一根短的導(dǎo)體，可以是各種金屬或合金的，也連接端子；其直流電阻是嚴格調(diào)好的；串接在直流電路里，直流電流過分流器，分流器兩端產(chǎn)生毫伏級直流電壓信號，使并接在該分流器兩端的計量表指針擺動，該讀數(shù)就是該直流電路里的電流值。所謂分流，即分一小的電流去推動表指示，該小電流（mA)與大回路里的電流(1A-幾十A）比例越小，電流表指示讀數(shù)的線性就越好，也更。這是電工電路的常用產(chǎn)品，防雷有分流措施。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">　　</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);"><strong style="margin:0px">三，分流器選型敘述：</strong></p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">FL-2型系列250A/75mV和300A/75mV分流器主要由錳銅片（Cu-Mn）和銅接頭焊接構(gòu)成，在分流器兩端的接頭上有兩組接線端鈕：外邊一組為電位端鈕，供與電源線連接，內(nèi)邊一組為電位端鈕供與測量儀表連接,本公司專業(yè)生產(chǎn)各類固定式定值分流器和精密合金電阻器的電參數(shù)和尺寸，同時我們能為客戶定做不同款式（包括出口型）的特殊分流器.如有特殊要求可訂制訂貨。高于150A/75mV的分流器如仍然需要增加底座隔離，本公司通常使用耐高溫材料（美國杜邦:HTNFR52G15BL，熔點：310度防火V0 注塑級)</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">FL-2型系列分流器其精度為：0.5級，規(guī)格范圍有：1A-15000A，二次電壓：20mV、30mV、50mV、60mV、75mV、100mV、150mV等，常規(guī)為75mV。通常2000A以上都改良為FL-29型或FL-39型外徑尺寸。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">一.產(chǎn)品用途：分流器廣泛用于擴大儀表測量電流范圍，均可用于通訊系統(tǒng)</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">電子整機自動化控制的電源等回路作限流.均流.取樣.檢測作用，使用條件為 B</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">組。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">二.主要技術(shù)參數(shù)：</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">1.準(zhǔn)確度等級：5~4000A:0.5 級,5000A~10000A:1 級。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">2.使用環(huán)境條件： -40~+60℃，相對濕度≤95%（35℃）</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">3.耐機械性能：能承受加速度為 70 米/秒及沖擊頻率每分鐘</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">80~120 次 6 小時的運輸顛震。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">4.超載性能：額定電流 120%，2 小時。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">5.電壓降：50mV,75mV,100mV,200mV,300mV.</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">6.負載下發(fā)熱：溫升變化趨穩(wěn)定電流 50A 以下不超過 80℃。額定電流 50A 以上不超過 120℃。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">三.分流器型號表示規(guī)則：</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">FL-2 200A 75mV 0.5％</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">（型號）（電流）（壓降）（精度）</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);"><strong style="margin:0px">四．分流器原理及接線方法</strong></p><table border="0" cellpadding="0" style="border-collapse:collapse; border-spacing:0px; color:rgb(0, 0, 0); font-family:宋體,tahoma,arial; font-size:12px; line-height:25px; list-style:none; margin:0px auto; padding:0px; width:625px"><tbody style="margin: 0px;"><tr style="margin: 0px;"><td style="margin: 0px; padding: 0px;"><table border="0" cellpadding="0" style="border-collapse:collapse; border-spacing:0px; list-style:none; margin:0px auto; padding:0px; width:625px"><tbody style="margin: 0px;"><tr style="margin: 0px;"><td style="margin: 0px; padding: 0px;"><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">用于測量直流電流的直流電流表，其輸入信號一般不允許超過DC2A，超過DC2A就應(yīng)該外接分流器。主要是受接觸彈片和PCB鋪銅的載流能力限制，長時間過載會引起發(fā)熱甚至燒壞儀表。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">對于分流器，二次輸出有幾種規(guī)格：75mV、100mV、200mV等。生產(chǎn)廠家也可以根據(jù)客戶需求定制。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">一般情況下，分流上有四個螺栓，兩個大的，兩個小的，用兩個大的螺栓使分流器串聯(lián)到待測電流信號的回路中。兩個小螺栓接入儀表信號輸入端，應(yīng)注意信號的極性，電流流入分流器的那端為正端，接儀表信號輸入端的正輸入端；電流流出分流器的那端為負端，接儀表信號輸入端的負輸入端。</p><p style="margin: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 26px; font-family: 宋體; color: rgb(85, 85, 85);">分流器是測量直流電流用的；<br style="margin: 0px;" />分流器實際就是一個阻值很小的電阻，當(dāng)有直流電流通過時，產(chǎn)生壓降，供直流電流表顯示；<br style="margin: 0px;" />直流電流表實際是電壓表，滿度值75mV；<br style="margin: 0px;" />直流電流表和分流器是配套使用的；<br style="margin: 0px;" />比如：100A電流表配套的分流器阻值為0.00075歐；<br style="margin: 0px;" />即100A*0.00075歐=75mV；<br style="margin: 0px;" />50A電流表配套的分流器阻值為0.0015歐；<br style="margin: 0px;" />50A*0.0015歐=75mV。</p></td></tr></tbody></table></td></tr></tbody></table> <div id="yq00aqiue" class="clear"></div> </div> <div id="yq00aqiue" class="article"> 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