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onmouseover="showsubmenu('高壓無線核相儀')">高壓無線核相儀</a> <div class="quimsyk" id="submenu_高壓無線核相儀" style="display:none"> <ul> </ul> </div> </li> <li id="quimsyk" class="yj"><a href="/ParentList-1935169.html" class="yja" onmouseover="showsubmenu('高壓核相儀')">高壓核相儀</a> <div class="quimsyk" id="submenu_高壓核相儀" style="display:none"> <ul> </ul> </div> </li> </ul> </div> </div></div> <div id="quimsyk" class="inpage_right"> <div id="quimsyk" class="mbx2"><a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > 直流高壓發(fā)生器耐壓試驗步驟及工作原理圖</div> <div id="quimsyk" class="inpage_content"> <div id="quimsyk" class="nr_main_box"> <h1 class="inside_rnewtil">直流高壓發(fā)生器耐壓試驗步驟及工作原理圖</h1> <div id="quimsyk" class="inside_rnewtime">點擊次數(shù)：1774 更新時間：2019-11-13</div> <div id="quimsyk" class="inside_rnewcon"><h3 style="padding: 0px 0px 10px; margin: 0px; font-size: 16px; font-family: Helvetica, Arial, sans-serif; font-weight: bold; text-align: center; line-height: 36px; border-bottom: 1px solid rgb(204, 204, 204);"><span style="font-size:16px"><span style="font-family:瀹嬩綋">直流高壓發(fā)生器耐壓試驗步驟及工作原理圖：</span><br /><span style="font-family:瀹嬩綋">1、對試品進(jìn)行泄漏及直流耐壓試驗</span><br /><span style="font-family:瀹嬩綋">⑴ 在做負(fù)載試驗前，將高壓屏蔽微安表安裝到倍壓筒上的高壓輸出端上，并將配套的高壓線分別接到微安表上和被試品上。</span><br /><span style="font-family:瀹嬩綋">⑵ 檢查儀器、放電棒、倍壓筒、試品聯(lián)接線、接地線是否正確，接地線聯(lián)接是否可靠，檢查高壓安全距離是否符合要求，方可開始進(jìn)行試品的高壓試驗。</span><br /><span style="font-family:瀹嬩綋">⑶ 直流高壓發(fā)生器檢查確認(rèn)儀器等無異常情況后，接通單相交流220V電源開關(guān)，此時綠燈亮，表示電源接通。可開始進(jìn)行試品的直流泄漏和直流耐壓試驗。</span><br /><span style="font-family:瀹嬩綋">⑷ 按紅色按鈕，則紅燈亮，表示高壓接通，待升高壓。</span><br /><span style="font-family:瀹嬩綋">⑸ 順時針方向平緩調(diào)節(jié)調(diào)壓電位器,輸出端即從零開始升壓。升壓速度以每秒3-5kV上升試驗電壓為宜。對于大電容試品升壓時則需要緩慢升壓，否則可能導(dǎo)致電壓過沖,還需監(jiān)視電流表充電電流不超過直流發(fā)生器的zui大充電電流。當(dāng)升到所需的電壓或電流后，按規(guī)定時間記錄電流表及電壓表的讀數(shù)。</span><br /><span style="font-family:瀹嬩綋">⑹ 試驗完畢后，降壓，將調(diào)壓電位器回零后，隨后按綠色按鈕，切斷高壓并關(guān)閉電源開關(guān)。</span><br /><span style="font-family:瀹嬩綋">⑺ 試驗完畢后，應(yīng)用放電棒對試品進(jìn)行多次放電，放電后方可靠近試品和拆線工作 (放電請詳細(xì)見放電棒使用說明書)。對小電容試品如氧化鋅避雷器、磁吹避雷器等緩緩調(diào)節(jié)調(diào)壓電位器升壓到所需的電壓(電流)值，然后從數(shù)顯表上讀出電壓(電流)數(shù)值。如需對氧化鋅避雷器進(jìn)行75%VDC-1mA的測量時，應(yīng)先升到電流到1000uA時電壓值停止(這時可記錄電壓、電流值)，然后按下黃色按鈕,電壓即降到原來的75%,并保持此狀態(tài)。此時可讀取微安表數(shù)值及電壓值。測量完畢后,調(diào)壓電位器逆時針回到零位,按下綠色按鈕,需再次升壓時按紅色按鈕即可。對大電容試品時，升壓應(yīng)更要緩慢，并需要監(jiān)視電流表充電電流不超過發(fā)生器的zui大充電電流，一定要放慢升壓速度,避免充電電流過大。試驗完畢后，將電壓調(diào)節(jié)電位器逆時針回到零位上，隨后按綠色按鈕，切斷高壓，此時先不要關(guān)閉電源，電壓表顯示還有電壓值，此為存電電壓，等電壓降到2000V左右,方可用放電棒進(jìn)行多次放電，確保安全。</span><br /><span style="font-family:瀹嬩綋">2、直流高壓發(fā)生器在使用過程中發(fā)現(xiàn)紅燈滅，綠燈亮，直流高壓下降，即為有關(guān)保護(hù)動作。此時應(yīng)按下列步驟操作:</span><br /><span style="font-family:瀹嬩綋">⑴ 將調(diào)壓電位器退回零位。</span><br /><span style="font-family:瀹嬩綋">⑵ 關(guān)閉電源開關(guān),面板指示燈均不亮。</span><br /><span style="font-family:瀹嬩綋">⑶ 一分鐘后,待機(jī)內(nèi)低壓電容器充分放電后，才允許再次打開電源開關(guān)。重新進(jìn)行空載試驗，并查明情況后，可再次升壓試驗。</span><br /><span style="font-family:瀹嬩綋">3、注意：做電纜試驗時，要安裝限流電阻使用。（做其它試驗時，不能使用限流電阻），于120KV以上。</span><br /><span style="font-family:瀹嬩綋">4、注意事項</span><br /><span style="font-family:瀹嬩綋">1、為確保人身安全，在此反復(fù)提醒用戶注意控制箱及倍壓筒的良好接地以及停機(jī)后的試品及倍壓筒放電問題。</span><br /><span style="font-family:瀹嬩綋">2、防止異物進(jìn)入控制箱，如控制箱有風(fēng)扇時，應(yīng)經(jīng)常檢查風(fēng)扇是否正常運轉(zhuǎn)。</span><br /><span style="font-family:瀹嬩綋">3、當(dāng)倍壓筒絕緣筒臟污時請用干布擦凈，不可用酒精，汽油等有機(jī)類溶劑擦洗。可用洗滌劑清洗絕緣筒表面，等風(fēng)干后方可使用，運輸或不使用時請放入箱內(nèi)。</span><br /><span style="font-family:瀹嬩綋">4、換保險管時，請按保險管座旁標(biāo)定的安培數(shù)更換保險管。</span><br /><span style="font-family:瀹嬩綋">5、直流高壓發(fā)生器若高壓屏蔽微安表上顯示"LOW BAT"時，請更換9V電池，以避免測量誤差。</span><br /><span style="font-family:瀹嬩綋">6、未經(jīng)允許，請勿開啟控制箱及倍壓筒，否則會影響產(chǎn)品的保修，自行拆卸廠方概不負(fù)責(zé)。</span><br /><span style="font-family:瀹嬩綋">7、儀器運輸時應(yīng)避免雨水浸蝕,嚴(yán)防碰撞和墜落。</span><br /><span style="font-family:瀹嬩綋">5、電氣工作原理框圖</span></span></h3></div> <div id="quimsyk" class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a 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