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class="inside_rnewtil">SXJS-IV介質(zhì)損耗測試儀性能原理</h1> <div id="pvhr3jx3r5" class="inside_rnewtime">點(diǎn)擊次數(shù)：1779 更新時間：2017-10-17</div> <div id="pvhr3jx3r5" class="inside_rnewcon"><p><strong>SXJS-IV介質(zhì)損耗測試儀性能原理</strong></p><p>SXJS-IV介質(zhì)損耗測試儀</p><p>一、性能<br />本儀器是一種*的測量介質(zhì)損耗（tgδ）和電容容量（Cx）的儀器，用于工頻高壓下，測量各種絕緣材料、絕緣套管、電力電纜、電容器、互感器、變壓器等高壓設(shè)備的介質(zhì)損耗（tgδ）和電容容量（Cx）。它淘汰了QSI高壓電橋，具有操作簡單、中文顯示、打印、使用方便、無需換算、自帶高壓，抗干擾能力強(qiáng)，測試時間短等優(yōu)點(diǎn)，是我廠的第三代智能化介質(zhì)損耗測試儀。 <br />二、SXJS-IV智能介質(zhì)損耗測試儀技術(shù)指標(biāo) <br />1、環(huán)境：-5℃～40℃（液晶屏應(yīng)避免長時間日照） <br />2、相對濕度：30%～70% <br />3、供電電源：電壓：220V±10%，頻率50±1Hz <br />4、外形尺寸：長*寬*高=500mm*300mm*400mm <br />5、重量：28kg <br />6、輸出功率：1.5KVA <br />7、顯示分辨率：3位、4位（內(nèi)部全是6位） <br />8、測試方法：正接法、反接法、外接試驗(yàn)電壓法<br />9、測量范圍：內(nèi)接試驗(yàn)電壓：≤60000PF（10KV電壓大于30000PF）<br />外接試驗(yàn)電壓：由外接試驗(yàn)變壓器輸出功率而定 <br />10、基本測量誤差： <br />介質(zhì)損耗（tgδ）：1%±0.04% <br />電容容量（Cx）：1%±1pF<br />三、SXJS-IV智能介質(zhì)損耗測試儀結(jié)構(gòu) <br />儀器為升壓與測量一體化結(jié)構(gòu)，輸出電壓2.5KV～10KV五檔可調(diào)，以適應(yīng)各種需要，在測量時無需任何外部設(shè)備。接線與QSI電橋相似，但比其方便。 <br />圖一為儀器操作面板圖，圖二為儀器接線端面板圖。 <br /><br /><img alt="" src="http://i01.yizimg.com/ComFolder/586162/201403/%E6%88%AA%E5%9B%BE20140304163125.jpg" style="height:auto; margin:0px auto 5px !important; width:555px" /><br />（1）顯示窗------------------------液晶顯示屏。 <br />（2）試驗(yàn)電壓選擇開關(guān)--------------當(dāng)開關(guān)置于“關(guān)”時，儀器無高壓輸出。 <br />（3）操作鍵盤---------------------選擇測量方式、起動、停止、打印等操作。 <br />（4）電源插座---------------------保險絲用。 <br />（5）電源開關(guān)---------------------電源通斷。<br />（6、7）起動燈--------------------指示高壓輸出。<br />(8) 打印機(jī)----------------------- 打印測試結(jié)果。 <br />★（9）接地端子-------------------使用前，必須將端子可靠接地?。?！ <br />★（10）測量電流輸出端IX------------有兩個出線頭，中心頭（紅色，有CX標(biāo)記）應(yīng)與被試品一端相接，屏蔽頭（黑色，有E標(biāo)記）是儀器內(nèi)部高壓變壓器的一個輸出端，在正接法測量時應(yīng)接地；在反接法測量時應(yīng)浮空；外接法參見“外接高壓法”。 <br />★（11）標(biāo)準(zhǔn)電流輸入端IN-----------僅當(dāng)外接標(biāo)準(zhǔn)電容器進(jìn)行測量時才用，該端應(yīng)與外接標(biāo)準(zhǔn)電容器一端相連。IN必須小于100mA?。?！ <br />（12）測量高壓輸出端UH-----------只有一個大鐵夾出線頭（有UH標(biāo)記），與被子試品一端相連接，是儀器內(nèi)部高壓變壓器的另一輸出端。 <br />四、工作原理<br />儀器測量線路包括一路標(biāo)準(zhǔn)回路和一路測試回路，如圖三所示。 <br />標(biāo)準(zhǔn)回路由內(nèi)置高壓穩(wěn)定度標(biāo)準(zhǔn)電容器與標(biāo)準(zhǔn)電阻網(wǎng)絡(luò)組成，由計(jì)算機(jī)實(shí)時采集標(biāo)準(zhǔn)回路電流與測試回路的電流幅值及其相位差，并算出被測試品電容容值（CX）和介質(zhì)損耗（tgδ）。<br />數(shù)據(jù)采集電路全部采用高壓穩(wěn)定器件，采集板和采集計(jì)算機(jī)被鐵盒*浮空屏蔽，儀器外殼接地屏蔽；另外使用了光導(dǎo)數(shù)據(jù)、浮空地、大面積地、單點(diǎn)地、數(shù)字濾波等抗干擾技術(shù)，加之計(jì)算機(jī)對數(shù)百個電網(wǎng)周期的數(shù)據(jù)進(jìn)行處理，使測量結(jié)果穩(wěn)定、、可靠。<br /><img alt="" src="http://i01.yizimg.com/ComFolder/586162/201403/%E6%88%AA%E5%9B%BE20140305095241.jpg" style="height:auto; margin:0px auto 5px !important; width:506px" /><br />由圖三可見，儀器高壓器的高壓側(cè)和測量線路都是浮地的，用戶可根據(jù)不同的測量對象和測量需要，靈活地采用多種接地方式。如采用“正接線法”進(jìn)行測量時，可將“E”點(diǎn)接地；而當(dāng)采用“反接法”進(jìn)行測量時，可將“UH”點(diǎn)接地，而將E點(diǎn)浮空。 <br />圖中除測試品CX外，其余為本儀器。細(xì)線框內(nèi)部分對儀器外殼隨15KV工頻高壓5分鐘，額定耐壓10KV。儀器內(nèi)附標(biāo)準(zhǔn)電容CN，名義值為50PF，tgδ≤0.0001，耐壓10KV。高壓變壓器，額定輸出功率為1.5KVA。 <br />★“E”點(diǎn)為儀器內(nèi)`屏蔽與測量電纜的屏蔽層相連，不是大地，與儀器外殼也不連通?。?！ <br />五、使用方法<br />★★★安全操作注意事項(xiàng) <br />1、使用時必須將儀器接地端子可靠接地。 <br />2、只有關(guān)閉儀器電源，試驗(yàn)電壓選擇開關(guān)置于“關(guān)”位置時，接觸儀器的后部及其測量線纜與被試品才被認(rèn)為是安全的。 <br />3、儀器在測試過程中，嚴(yán)禁操作“試驗(yàn)電壓”選擇開關(guān)。 <br />4、★正接線法UH端為高電壓，反接線法IX端為高電壓，使用時必須根據(jù)實(shí)際情況，將帶高壓的線纜與地保持足夠的距離，使用我公司提供的特種絕緣電纜測量大容量試品可以拖地使用。 <br />5、不得更換不符合面板指示值的保險絲管。<br />6、使用時盡可能用廠家隨儀器提供的線纜以確保測量準(zhǔn)確度。 <br />7、操作鍵盤 <br />備用------不用。<br />快測-------快速測量，無抗干擾功能。 <br />抗擾-------抗干擾測量。 <br />正接-------正接法測量。 <br />打印-------在測試結(jié)果出來后，打印測試數(shù)據(jù)。 <br />反接-------反接法測量。 <br />起動-------起動高壓，開始測量。 <br />外接-------外接法測量。也用來選擇外接標(biāo)準(zhǔn)電容的容量。 <br />停止-------可以在測試過程中，中斷測量。 <br />打開電源，儀器首先自檢 <br />（顯示屏、光電通訊、內(nèi)存、操作鍵、數(shù)模轉(zhuǎn)換、電網(wǎng)頻率），自檢通過后，進(jìn)入主目錄。這時按屏幕提示即可完成測試。 <br />進(jìn)入測量狀態(tài)后，用戶隨時可用“停止”鍵退出測量狀態(tài)。 <br />做正、反接測量時無須人工干預(yù)，測試線的接法與儀器操作測量方式相符，如使用正接法的接線方式，測試時，按“反接”鍵測量，也能得出結(jié)果，但該結(jié)果不真實(shí)可靠。 <br />做外接方式測量時，中途會顯示“請關(guān)閉外接高壓！”并停一下，等候人工將外加高壓關(guān)閉，關(guān)閉外高壓后（必須關(guān)閉外高壓），再按一次“起動”，鍵才能完成測試。 <br />如果外高壓未關(guān)閉，則測試結(jié)果不真實(shí)。 <br />外接標(biāo)準(zhǔn)電容的容量選擇： <br />“外接方式”時，按一次“外接”鍵，則顯示的外接標(biāo)準(zhǔn)電容容量“XXXXpF”將改變，共八種容量供選擇（zui后一種為廠家調(diào)試用，用戶使用則無效）。 <br />50pF,100pF,150pF,200pF,500pF,1000pf,XXXpF,XXXpF. <br />應(yīng)選擇與外接標(biāo)準(zhǔn)電容相等的容量。如果使用的外接電容量特殊，可請生產(chǎn)廠家將該電容容量輸入儀器中。如果選擇的外接電容與實(shí)際不相等，則測量結(jié)果會受影響。 <br />正接線法：（接線如圖四所示） <br />通電前，先將“試驗(yàn)電壓”開關(guān)置于“關(guān)”位置。將UH端子用線纜的大鐵夾（有UH標(biāo)記），接至被試品高壓端，將IX端子用另一根線纜的芯線線頭（紅色，有CX標(biāo)記），接被試品CX低壓端，它的屏蔽線頭（黑色，有E標(biāo)記）接地，如果試品低壓端有屏蔽端子，可用導(dǎo)線將該端子與“E”連接后接地。 <br />通電后，按“正接”鍵。選好的正接線方式：用“試驗(yàn)電壓”開關(guān)選好電壓：然后按“起動”鍵開始測試。<br />反接線法（接線如圖五所示） <br />通電前，先將“試驗(yàn)電壓”開關(guān)置于“關(guān)”位置，將UH端子接地，將IX的芯線（有CX標(biāo)記）接至被試品CX的高壓端。 <br />通電后，按“反接”鍵，選好反接線方式：用“試驗(yàn)電壓”開關(guān)選好電壓，然后按“起動”鍵開始測試。 <br />特別注意：屏蔽“E”與IX電位接近，可接至被試品高壓端的屏蔽或者懸空，不能接地?。?！否則，儀器內(nèi)部高壓器變壓器輸出端短路。 <br />外接高壓法：接線如圖六所示 <br />CB為外接標(biāo)準(zhǔn)電容，CX為被試品。 <br />當(dāng)被試品要求試驗(yàn)電壓大于10KV時或試品容量大于60000pF時，可以外接高壓進(jìn)行測量，即不使用儀器內(nèi)部高壓器，而外接一臺高壓裝置進(jìn)行測量。<br />注意：外接高壓法進(jìn)行測量時，“試驗(yàn)電壓”開關(guān)置于“關(guān)”位置！調(diào)整好外接電壓，然后“起動”鍵開始測試。<br />通電后多接“外接”鍵，選好外接方式以及外接的標(biāo)準(zhǔn)電容容量，必須再將“試驗(yàn)電壓”開關(guān)置于“關(guān)”位置！調(diào)整好外接電壓，然后“起動”鍵開始測試。<br />該儀器為中文液晶顯示，有中文漢字提示各類測試信息，當(dāng)測試完成后，可按“打印”鍵，打印測試結(jié)果。<br /><img alt="" src="http://i01.yizimg.com/ComFolder/586162/201403/%E6%88%AA%E5%9B%BE20140305095339.jpg" style="height:auto; margin:0px auto 5px !important; width:417px" /><br />六、保管及免費(fèi)修理期限 <br />儀器應(yīng)在原廠包裝條件下，于室內(nèi)貯存，其環(huán)境濕度為-20℃-40℃，相對濕試為30%-70%，且在空氣中不應(yīng)含有足以引起腐蝕的有害物質(zhì)。儀器從冷環(huán)境突然到熱環(huán)境中時，可能有結(jié)露消失再使用。每年應(yīng)打開儀器，清除由于野外作業(yè)產(chǎn)生的灰塵，特別是內(nèi)部標(biāo)準(zhǔn)電空處的灰塵。 <br />儀器和附件自制造廠發(fā)貨日期起2年內(nèi)，當(dāng)用戶在*遵守制造廠使用說明書所規(guī)定的保管、使用條件下，發(fā)現(xiàn)產(chǎn)品制造質(zhì)量不良或不能正常工作時，制造廠負(fù)責(zé)給予修理或更換。 <br />七、部分設(shè)備測試接線方法<br /><br />（一）, 電流 / 電壓互感器<br />1、電流 / 電壓互感器的測試項(xiàng)目：<br />（1）、一次繞組對二次繞組的介損<br />（2）、一次繞組對二次繞組及地的介損<br />（3）、瓷套管的介損及電容量<br />2、接線<br />（1）、一次繞組對二次繞組的介損(如圖所示)<br /><img alt="" src="http://i01.yizimg.com/ComFolder/586162/201403/%E6%88%AA%E5%9B%BE20140305095441.jpg" style="height:auto; margin:0px auto 5px !important; width:425px" /><br />采用正接法試驗(yàn)，試驗(yàn)電壓2.5KV-10KV <br />（2）、一次繞組對二次繞組及地的介損(如圖所示)<br /><img alt="" src="http://i01.yizimg.com/ComFolder/586162/201403/%E6%88%AA%E5%9B%BE20140305095515.jpg" style="height:auto; margin:0px auto 5px !important; width:391px" /><br />采用反接法試驗(yàn)，試驗(yàn)電壓2.5KV-10KV <br />（3）、瓷套管的介損及電容量(另述)<br />(二), 變壓器<br />1、變壓器的測試項(xiàng)目：<br />（1）、一次繞組對二次繞組的介損<br />（2）、一次繞組對二次繞組及地的介損<br />（3）、二次繞組對一次繞組及地的介損<br />（3）、瓷套管的介損及電容量<br />2、接線<br />（1）、一次繞組對二次繞組的介損(如圖所示)<br /><img alt="" src="http://i01.yizimg.com/ComFolder/586162/201403/%E6%88%AA%E5%9B%BE20140305095605.jpg" style="height:auto; margin:0px auto 5px !important; width:488px" /><br />采用正接法試驗(yàn)，試驗(yàn)電壓10KV <br />（2）、一次繞組對二次繞組及地的介損(如圖所示)<br /><img alt="" src="http://i01.yizimg.com/ComFolder/586162/201403/%E6%88%AA%E5%9B%BE20140305095757.jpg" style="height:auto; margin:0px auto 5px !important; width:426px" /><br />采用反接法試驗(yàn)，試驗(yàn)電壓10KV <br />（3）、二次繞組對一次繞組及地的介損(如圖所示)<br /><img alt="" src="http://i01.yizimg.com/ComFolder/586162/201403/%E6%88%AA%E5%9B%BE20140305100113.jpg" style="height:auto; margin:0px auto 5px !important; width:442px" /><br />采用反接法試驗(yàn)，試驗(yàn)電壓2.5KV-10KV <br /> <br />(三)、電容型套管<br />測量在三相變壓器的任一只電容型套管的tgδ和電容時，相同電壓等級的三相繞組<br />中性點(diǎn)（如中性點(diǎn)有套管引出）必須短接加壓，將非測量的其他繞組短接地，否則造成<br />較大的誤差。采用正接線方式，將儀器IX線之CX夾子夾到小套管引線上，UH線將高壓加到導(dǎo)電桿上，試驗(yàn)電壓10KV。<br />具有抽壓和測量端子（小套管引出線）引出的電容型套管，tgδ和電容的測量，可分別在導(dǎo)電桿和各端子之間進(jìn)行：<br />測量導(dǎo)電桿對測量端子的tgδ和電容時，抽壓端子懸空。<br />測量導(dǎo)電桿對抽壓端子的tgδ和電容時，測量端子懸空。<br />測量抽壓端子對測量端子的tgδ和電容時，導(dǎo)電桿懸空，此時試驗(yàn)電壓不應(yīng)<br />超過該端子的正常工作電壓。<br /> <br /><br /><br /><br />八、儀器成套性 <br />（1）介質(zhì)損耗測試儀 1臺 <br />（2）測試線纜 1套<br />（3）保險絲（1） 4只 <br />(0.) 2只<br />（4）電源線 1根 <br />（5）使用說明書 1份<br />(6) 產(chǎn)品合格證 1份</p></div> <div id="pvhr3jx3r5" class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a href="/Article-1373949.html">RZJ-6G繞組匝間沖擊耐電壓試驗(yàn)儀特點(diǎn)和功能簡單工作原理</a></b></p> <p id="newsnext">下一篇：<b class="newsnext"><a href="/Article-1370734.html">ETCR7100超大口徑鉗形漏電流表特點(diǎn)技術(shù)參數(shù)</a></b></p> <span><a href="/article.html">返回列表>></a></span> </div> </div> </div> </div> </div>    <div class="pvhr3jx3r5" id="z_Footer"> <div id="pvhr3jx3r5" class="pz_down"> <div id="pvhr3jx3r5" class="w_1200"> <div id="pvhr3jx3r5" class="footT"> <div id="pvhr3jx3r5" class="footAddr"> <div id="pvhr3jx3r5" class="footTit">上?？档请姎饪萍加邢薰?/div> <div id="pvhr3jx3r5" class="dAddr"><img class="ico" 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