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交流耐壓試驗變壓器

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產品名稱: 交流耐壓試驗變壓器(qi)

產品型號: WBYD-200KV

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產品簡介

WBYD-200KV交流耐壓試驗變壓器具有體積小、重量輕、不受氣候變化影響、電暈小、現場搬運無需靜止可使用，使用壽命長、免維修等特點。適用于電力系統、工礦企業、科研部門等對各種高壓電氣設備、電氣元件、絕緣材料進行工頻或直流高壓下的絕緣強度試驗。交流耐壓試驗變壓器采用單框芯式鐵芯結構，初級繞組繞在鐵芯上，高壓繞組在外，這種同軸布置減少了漏磁通，因而增大了繞組間的耦合。

詳細介紹

一、WBYD-200KV交流耐壓試驗變壓器概(gai)述

YDQ系列高壓(ya)(ya)(ya)(ya)試驗(yan)變壓(ya)(ya)(ya)(ya)器是(shi)根據《試驗(yan)變壓(ya)(ya)(ya)(ya)器》標準(zhun)，在(zai)油(you)浸式試驗(yan)變壓(ya)(ya)(ya)(ya)器的(de)基礎上而設(she)計(ji)生(sheng)產(chan)的(de)。SF6氣(qi)(qi)(qi)體具(ju)有良好的(de)電氣(qi)(qi)(qi)絕緣(yuan)性(xing)能及優異的(de)滅弧性(xing)能，其耐(nai)壓(ya)(ya)(ya)(ya)強(qiang)度為同(tong)一(yi)壓(ya)(ya)(ya)(ya)力下氮氣(qi)(qi)(qi)的(de)2.5倍(bei)，擊穿電壓(ya)(ya)(ya)(ya)的(de)空氣(qi)(qi)(qi)的(de)2.5倍(bei)。在(zai)0.25MPa下與油(you)的(de)擊穿電壓(ya)(ya)(ya)(ya)相等，在(zai)0.45MPa壓(ya)(ya)(ya)(ya)力下是(shi)油(you)的(de)擊穿電壓(ya)(ya)(ya)(ya)的(de)2倍(bei)，是(shi)一(yi)種優于(yu)油(you)的(de)新一(yi)代超高壓(ya)(ya)(ya)(ya)絕緣(yuan)介質材(cai)料。該產(chan)品技術要求完全(quan)符合《ZBK-41006-89》標準(zhun)，它是(shi)油(you)浸式輕(qing)型試驗(yan)變壓(ya)(ya)(ya)(ya)器的(de)換代產(chan)品。該產(chan)品具(ju)有體積小(xiao)、重量輕(qing)、不受(shou)氣(qi)(qi)(qi)候變化影響(xiang)、電暈小(xiao)、現場搬運無需(xu)靜止可使用(yong)，使用(yong)壽命(ming)長、免維修等特點(dian)。適用(yong)于(yu)電力系統(tong)、工礦企(qi)業(ye)、科研部(bu)門等對各(ge)種高壓(ya)(ya)(ya)(ya)電氣(qi)(qi)(qi)設(she)備、電氣(qi)(qi)(qi)元件、絕緣(yuan)材(cai)料進行工頻或直流高壓(ya)(ya)(ya)(ya)下的(de)絕緣(yuan)強(qiang)度試驗(yan)。

二、WBYD-200KV交流耐壓試驗變壓器產品結構

YDQ系列高(gao)壓(ya)(ya)試驗(yan)變壓(ya)(ya)器采用單框芯式(shi)鐵芯結構(gou)，初(chu)級繞組繞在鐵芯上，高(gao)壓(ya)(ya)繞組在外(wai)，這種同軸布(bu)置減少(shao)了(le)漏磁通，因而增大了(le)繞組間的耦(ou)合。產(chan)品的外(wai)殼為(wei)圓柱灌式(shi)容(rong)器結構(gou)，能耐受0.8MPa以上壓(ya)(ya)力。其結構(gou)見圖1：

<strong><strong>SF6充氣型試驗變壓器</strong></strong>

三、WBYD-200KV交流耐壓試驗變壓器工作原理

YDQ系(xi)列(lie)高壓(ya)試驗(yan)(yan)(yan)變(bian)(bian)壓(ya)器(qi)(qi)(qi)為(wei)(wei)單相(xiang)變(bian)(bian)壓(ya)器(qi)(qi)(qi)，聯結組標號Ⅰ.Ⅰ. 用工(gong)頻220V(10kVA以上為(wei)(wei)380V)電源(yuan)接入 (為(wei)(wei)本公(gong)司(si)生產的試驗(yan)(yan)(yan)變(bian)(bian)壓(ya)器(qi)(qi)(qi)配套專用設備，詳細資(zi)料請見(jian)其(qi)具體使用說明(ming)書)系(xi)列(lie)操(cao)(cao)作箱(臺)，經操(cao)(cao)作箱內自(zi)偶調壓(ya)器(qi)(qi)(qi)(50kVA以上調壓(ya)器(qi)(qi)(qi)外附)調節至0～200V(或0～400V)電壓(ya)輸出至YDQ試驗(yan)(yan)(yan)變(bian)(bian)壓(ya)器(qi)(qi)(qi)的初級繞組，根據電磁感應原理，在試驗(yan)(yan)(yan)變(bian)(bian)壓(ya)器(qi)(qi)(qi)高壓(ya)繞組可獲得試驗(yan)(yan)(yan)所(suo)需的高電壓(ya)。

單臺(tai)YDQ系列高壓試驗變壓器的工作原理(li)圖(tu)見圖(tu)2。

單(dan)臺YDQ系列(lie)交直流(liu)高(gao)壓(ya)(ya)(ya)(ya)試驗變壓(ya)(ya)(ya)(ya)器的(de)工(gong)作(zuo)(zuo)原理圖見圖3，圖中(zhong)(zhong)高(gao)壓(ya)(ya)(ya)(ya)套管中(zhong)(zhong)裝有高(gao)壓(ya)(ya)(ya)(ya)硅堆(dui)，串接(jie)在高(gao)壓(ya)(ya)(ya)(ya)回路(lu)中(zhong)(zhong)作(zuo)(zuo)半波整流(liu)，以(yi)獲得直流(liu)高(gao)電壓(ya)(ya)(ya)(ya)。當(dang)用一短(duan)路(lu)桿將高(gao)壓(ya)(ya)(ya)(ya)硅堆(dui)短(duan)接(jie)時，可獲得工(gong)頻高(gao)電壓(ya)(ya)(ya)(ya)，作(zuo)(zuo)為交流(liu)輸(shu)出(chu)狀態(tai)；取(qu)消短(duan)路(lu)桿時，作(zuo)(zuo)為直流(liu)輸(shu)出(chu)狀態(tai)。

試(shi)驗(yan)變壓(ya)器高(gao)(gao)壓(ya)套(tao)管中(zhong)的高(gao)(gao)壓(ya)硅(gui)堆未畫出，其原(yuan)理與上(shang)圖(tu)相(xiang)同。

三(san)(san)臺(tai)(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)串(chuan)級(ji)(ji)獲得(de)更高電壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)接線原(yuan)理(li)見圖(tu)4。串(chuan)級(ji)(ji)高壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)有很大的(de)(de)(de)優越性，因(yin)為整個試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)裝(zhuang)(zhuang)置(zhi)由(you)幾臺(tai)(tai)(tai)單(dan)臺(tai)(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)組(zu)(zu)(zu)成，單(dan)臺(tai)(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)容量(liang)小、電壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)低、重量(liang)輕(qing)，便于(yu)運(yun)輸(shu)和安裝(zhuang)(zhuang)。它既然(ran)可串(chuan)接成高出幾倍的(de)(de)(de)單(dan)臺(tai)(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)輸(shu)出電壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)組(zu)(zu)(zu)合使用，又可分(fen)(fen)開成幾套單(dan)臺(tai)(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)單(dan)獨使用。整套裝(zhuang)(zhuang)置(zhi)投資小，經(jing)濟實惠(hui)。圖(tu)5中，在**級(ji)(ji)和**級(ji)(ji)的(de)(de)(de)每個單(dan)元試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)中都(dou)有一個勵(li)磁(ci)繞(rao)(rao)組(zu)(zu)(zu)A1、C1和A2、C2。在三(san)(san)臺(tai)(tai)(tai)串(chuan)級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)基本原(yuan)理(li)中，低壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)電源加在試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅰ的(de)(de)(de)初(chu)級(ji)(ji)繞(rao)(rao)組(zu)(zu)(zu)a1x1上(shang)(shang)，單(dan)臺(tai)(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅰ、Ⅱ、Ⅲ的(de)(de)(de)輸(shu)出電壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)都(dou)是V。勵(li)磁(ci)繞(rao)(rao)組(zu)(zu)(zu)A1、C1給**級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅱ的(de)(de)(de)初(chu)級(ji)(ji)繞(rao)(rao)組(zu)(zu)(zu)供電；**級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅱ的(de)(de)(de)勵(li)磁(ci)繞(rao)(rao)組(zu)(zu)(zu)A2、C2給第(di)三(san)(san)級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅲ的(de)(de)(de)初(chu)級(ji)(ji)繞(rao)(rao)組(zu)(zu)(zu)供電。**級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅱ和第(di)三(san)(san)級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅲ的(de)(de)(de)箱(xiang)體(ti)分(fen)(fen)別處(chu)在對地為1V和2V的(de)(de)(de)高電位(wei)上(shang)(shang)，所以箱(xiang)體(ti)對地是絕緣(yuan)的(de)(de)(de)，試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅰ的(de)(de)(de)箱(xiang)體(ti)是接地的(de)(de)(de)。這樣**級(ji)(ji)、**級(ji)(ji)、第(di)三(san)(san)級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)對地的(de)(de)(de)額(e)定輸(shu)出電壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)分(fen)(fen)別為1V、2V、3V；其額(e)定容量(liang)分(fen)(fen)別為3P、2P、1P。

YDQ系列高壓試(shi)驗變壓器做被(bei)試(shi)品的工頻耐壓試(shi)驗使用接線原理圖見圖5。

圖(tu)中：R1—限流(liu)電(dian)阻 FRC—阻容(rong)分壓器 RF—球(qiu)間隙(xi)保護(hu)電(dian)阻 G—球(qiu)間隙(xi) CX—被試品

注：高(gao)壓(ya)尾必須可(ke)靠接地

工(gong)頻耐(nai)壓(ya)(ya)(ya)試驗中限流電(dian)(dian)(dian)阻R1應根據試驗變壓(ya)(ya)(ya)器的(de)(de)額(e)(e)定容量(liang)來選擇。如高壓(ya)(ya)(ya)側額(e)(e)定輸出電(dian)(dian)(dian)流在100～300mA時，可(ke)取(qu)0.5～1Ω/V(試驗電(dian)(dian)(dian)壓(ya)(ya)(ya))；高壓(ya)(ya)(ya)側額(e)(e)定輸出電(dian)(dian)(dian)流為1A以(yi)上時，可(ke)取(qu)1Ω/V(試驗電(dian)(dian)(dian)壓(ya)(ya)(ya))。常用水電(dian)(dian)(dian)阻作為限流電(dian)(dian)(dian)阻，管子(zi)長(chang)度可(ke)按150kV/m考慮，管子(zi)粗(cu)細應具(ju)有足夠的(de)(de)熱容量(liang)(水阻液配制方法：用蒸餾水加入(ru)適量(liang)硫酸(suan)銅配制成(cheng)各種(zhong)不同的(de)(de)阻值)。

球間(jian)(jian)隙(xi)及保護(hu)電(dian)阻：當(dang)電(dian)壓(ya)超過球間(jian)(jian)隙(xi)整定(ding)值(zhi)時(shi)(一般(ban)取(qu)試驗(yan)電(dian)壓(ya)的110%~120%)，球間(jian)(jian)隙(xi)放電(dian)，對被試品起到保護(hu)作用。球間(jian)(jian)隙(xi)保護(hu)電(dian)阻可按1Ω/V(試驗(yan)電(dian)壓(ya))選取(qu)。

在(zai)(zai)(zai)(zai)工(gong)頻耐壓(ya)(ya)(ya)(ya)試(shi)驗(yan)(yan)中，低(di)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)側(ce)測量電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(儀表(biao)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya))不是非(fei)常準(zhun)確的(de)，其原因是由于試(shi)驗(yan)(yan)變壓(ya)(ya)(ya)(ya)器(qi)存在(zai)(zai)(zai)(zai)著漏(lou)(lou)抗，在(zai)(zai)(zai)(zai)這個漏(lou)(lou)抗上必(bi)然存在(zai)(zai)(zai)(zai)著壓(ya)(ya)(ya)(ya)降或(huo)容(rong)升(sheng)，使試(shi)品上的(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)低(di)于或(huo)高于低(di)壓(ya)(ya)(ya)(ya)側(ce)測量電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)表(biao)上反映出來的(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)。工(gong)頻耐壓(ya)(ya)(ya)(ya)試(shi)驗(yan)(yan)時，被試(shi)品上的(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)高于試(shi)驗(yan)(yan)變壓(ya)(ya)(ya)(ya)器(qi)的(de)輸出電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)，也就是所謂容(rong)升(sheng)現象。感應耐壓(ya)(ya)(ya)(ya)試(shi)驗(yan)(yan)時，試(shi)驗(yan)(yan)變壓(ya)(ya)(ya)(ya)器(qi)的(de)漏(lou)(lou)抗必(bi)然存在(zai)(zai)(zai)(zai)著壓(ya)(ya)(ya)(ya)降。為(wei)了(le)準(zhun)確測量被試(shi)品上所施加的(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)，因此常在(zai)(zai)(zai)(zai)高壓(ya)(ya)(ya)(ya)側(ce)接(jie)入FRC阻容(rong)分壓(ya)(ya)(ya)(ya)器(qi)來測量電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(見圖5)。

工頻耐壓試驗操(cao)作注意事項

1）試驗人員(yuan)應做好分(fen)工，明(ming)確相互(hu)間聯系(xi)方法。并(bing)有專門(men)人監護(hu)現場**及觀察(cha)試品(pin)狀態。

2）被試(shi)品(pin)應先清掃干凈，并**干燥，以免損壞被試(shi)品(pin)和試(shi)驗帶(dai)來(lai)的誤(wu)差。

3）對于(yu)大型試驗(yan)，一(yi)般都應(ying)先進行空升(sheng)(sheng)試驗(yan)。即不接試品時升(sheng)(sheng)壓至試驗(yan)電(dian)壓，校對各種表計，調整球間隙。

4）升壓(ya)速度不(bu)能(neng)太(tai)快，并必須防止突然(ran)(ran)加壓(ya)。例(li)如調(diao)壓(ya)器(qi)不(bu)在零位時(shi)突然(ran)(ran)合閘(zha)。也(ye)不(bu)能(neng)突然(ran)(ran)切斷電源，一般應(ying)在調(diao)壓(ya)器(qi)降至零位時(shi)拉閘(zha)。

5）當電壓(ya)(ya)升(sheng)至(zhi)試驗(yan)電壓(ya)(ya)時，開始計時，到(dao)1min后，迅(xun)速(su)降壓(ya)(ya)到(dao)1/3試驗(yan)電壓(ya)(ya)以下時，才能拉開電源。

6）在(zai)升壓或耐壓試驗過(guo)程中，如發現(xian)下(xia)列不正(zheng)(zheng)常(chang)情(qing)況時，應(ying)立即(ji)降(jiang)壓，切斷電源。停止試驗并查明原因：①電壓表指針擺動很大；②發現(xian)絕緣燒焦或冒煙；③被試品內有不正(zheng)(zheng)常(chang)的(de)聲音。

7）耐壓試驗(yan)前后應測量絕緣電阻，檢查(cha)絕緣情(qing)況(kuang)。

試(shi)驗變壓(ya)器在做被試(shi)品的直流耐壓(ya)或泄露試(shi)驗時接線(xian)原理圖如圖6。

注：此試驗應先(xian)抽出短路桿(gan)“D”，圖6中所示。

圖中：VD—高壓硅堆 R1—限流電阻 C1—高壓濾波電容 FRC—阻容分壓器 CX—被試(shi)品 μA—帶(dai)保護微安表

泄露(lu)試驗中(zhong)限(xian)流(liu)電(dian)(dian)阻(zu)R1選(xuan)(xuan)擇在(zai)額定輸出電(dian)(dian)壓(ya)時(shi)，輸出端(duan)短路(lu)電(dian)(dian)流(liu)不超過高壓(ya)硅堆(dui)的(de)*大整流(liu)。如電(dian)(dian)壓(ya)硅堆(dui)的(de)*大整流(liu)電(dian)(dian)流(liu)為100mA時(shi)用于60kV的(de)試驗裝置(zhi)中(zhong)，限(xian)流(liu)電(dian)(dian)阻(zu)按R1=60/0.1=600kΩ選(xuan)(xuan)擇。限(xian)流(liu)電(dian)(dian)阻(zu)還應具有足(zu)夠的(de)容量(liang)和沿面(mian)放電(dian)(dian)距(ju)離(li)。

高壓(ya)濾波電容C1一(yi)般選擇在(zai)0.01~0.1μF，當被(bei)試品的電容量(liang)很大時(shi)，C1可省略不用。

泄露試驗的操作及注意(yi)事項

1）試驗前應先檢(jian)查被試品是(shi)否(fou)停電，接地放電，一切對外連線是(shi)否(fou)擦干(gan)凈。要嚴防將試驗電壓(ya)加到有人工作的部位上去。

2）接好試驗裝(zhuang)置的(de)接線后(hou)，應(ying)復查無誤(wu)后(hou)才可加壓(ya)。應(ying)特別注(zhu)意檢查高壓(ya)設備及引線與(yu)地、與(yu)操作人員的(de)**距(ju)離，被(bei)試品的(de)外殼(ke)是否(fou)可靠接地，要(yao)按(an)**規程中所規定(ding)的(de)內容進行試驗。

3）對于大電容量設(she)備應(ying)緩(huan)慢升壓(ya)，防止被試品的充電電流(liu)燒壞(huai)微(wei)安表。必要(yao)時應(ying)分級(ji)加壓(ya)，分別讀取各級(ji)電壓(ya)下微(wei)安表的穩定(ding)讀數。

4）試(shi)驗過程中，應密(mi)切(qie)監視被試(shi)品、試(shi)驗裝置、微安(an)表，一(yi)旦發生擊(ji)穿、閃爍等異常現(xian)象(xiang)應立即降(jiang)壓，切(qie)斷電源，并查(cha)明原因，詳細(xi)記錄。

5）試驗完畢，降壓，切斷電源(yuan)后應將(jiang)被試品(pin)及試驗裝(zhuang)置(zhi)本(ben)身充分放電。

四、WBYD-200KV交流耐壓試驗變壓器注意事項

1、按(an)照您所進行的(de)(de)試(shi)驗接好工(gong)作線路。試(shi)驗變壓(ya)器(qi)的(de)(de)外(wai)殼(ke)以(yi)及操作系(xi)統(tong)的(de)(de)外(wai)殼(ke)必須(xu)可靠接地。試(shi)驗變壓(ya)器(qi)高壓(ya)繞組(zu)的(de)(de)X端(duan)(高壓(ya)尾(wei))以(yi)及測量(liang)繞組(zu)的(de)(de)F端(duan)必須(xu)可靠接地。

2、做(zuo)串級(ji)試(shi)驗時，**級(ji)、第三(san)級(ji)試(shi)驗變(bian)壓(ya)器(qi)的(de)低壓(ya)繞組(zu)的(de)X端(duan)，測量繞組(zu)的(de)F端(duan)以及高(gao)壓(ya)繞組(zu)的(de)X端(duan)(高(gao)壓(ya)尾)均接本級(ji)試(shi)驗變(bian)壓(ya)器(qi)的(de)外殼。**級(ji)、第三(san)級(ji)試(shi)驗變(bian)壓(ya)器(qi)的(de)外殼必須通過絕緣支架接地。

3、接通電(dian)(dian)源(yuan)前，操作(zuo)系統(tong)的調壓器必須調到零位后方可(ke)接通電(dian)(dian)源(yuan)，合閘(zha)，開始升壓。

4、從(cong)(cong)零開(kai)始均勻(yun)旋轉調壓(ya)(ya)(ya)器手輪升(sheng)(sheng)(sheng)(sheng)壓(ya)(ya)(ya)。升(sheng)(sheng)(sheng)(sheng)壓(ya)(ya)(ya)方(fang)法(fa)(fa)有：快速(su)升(sheng)(sheng)(sheng)(sheng)壓(ya)(ya)(ya)法(fa)(fa)，即(ji)20s逐級(ji)升(sheng)(sheng)(sheng)(sheng)壓(ya)(ya)(ya)法(fa)(fa)；慢(man)速(su)升(sheng)(sheng)(sheng)(sheng)壓(ya)(ya)(ya)法(fa)(fa)，即(ji)60s逐級(ji)升(sheng)(sheng)(sheng)(sheng)壓(ya)(ya)(ya)法(fa)(fa)；極慢(man)速(su)升(sheng)(sheng)(sheng)(sheng)壓(ya)(ya)(ya)法(fa)(fa)供選用。電壓(ya)(ya)(ya)從(cong)(cong)零開(kai)始按(an)一定的升(sheng)(sheng)(sheng)(sheng)壓(ya)(ya)(ya)方(fang)式和速(su)度上升(sheng)(sheng)(sheng)(sheng)到(dao)您(nin)所需的額(e)定試(shi)驗(yan)電壓(ya)(ya)(ya)的75%后，在(zai)以每秒2%額(e)定試(shi)驗(yan)電壓(ya)(ya)(ya)的速(su)度升(sheng)(sheng)(sheng)(sheng)到(dao)您(nin)所需的額(e)定電壓(ya)(ya)(ya)，并密切注意測量儀(yi)(yi)表的指示(shi)以及(ji)被試(shi)品的情(qing)況。升(sheng)(sheng)(sheng)(sheng)壓(ya)(ya)(ya)過程(cheng)中(zhong)或試(shi)驗(yan)過程(cheng)中(zhong)如發現測量儀(yi)(yi)表的指示(shi)及(ji)被試(shi)品情(qing)況異(yi)常，應立(li)即(ji)降壓(ya)(ya)(ya)，切斷(duan)電源(yuan)，查明情(qing)況。

5、試(shi)驗完畢后(hou)，應在(zai)數秒內(nei)勻速的將調壓器返回至零(ling)位(wei)，然后(hou)切斷(duan)電(dian)源(yuan)。

6、本產品不得超過額定參(can)數(shu)使用。除(chu)試(shi)驗必須(xu)外，決(jue)不允許全電壓通電或斷電。

7、再(zai)升壓或耐(nai)壓試驗過程中，如發現以下不正(zheng)常情況時(shi)，應立即(ji)降壓，切斷電源，停止(zhi)試驗并(bing)查明原因。

⑴電壓表指(zhi)針擺動(或數字跳(tiao)動)很(hen)大(da)

⑵電流表直線(xian)上升

被試(shi)品內有不正常的(de)聲音

8、圖(tu)1中第(di)9項系壓力(li)(li)閥(fa)及(ji)壓力(li)(li)表，為長期關(guan)閉狀(zhuang)態。每6個(ge)月(yue)開閥(fa)一次，以檢查SF6壓力(li)(li)，應不小于0.2MPa(檢查壓力(li)(li)后立即關(guan)閉閥(fa)門)，低于0.2MPa時應加(jia)SF6氣(qi)體，以增加(jia)氣(qi)絕緣。

9、耐壓實驗前后(hou)應測量被試設(she)備的絕緣電阻，檢(jian)查絕緣情況。

10、當(dang)試驗變壓器長期不使(shi)用(yong)時，應放(fang)置于通風、干燥、無陽光直射(she)的地方。

11、該產(chan)品(pin)不允許在高于45℃的(de)溫度下長期存放、使用、放氣。

12、運輸(shu)搬運途(tu)中不得重力沖擊。

13、產品緊(jin)固(gu)件及(ji)壓力(li)閥、壓力(li)表不得擅自(zi)松動。

14、使用本產品(pin)做高壓試(shi)(shi)驗(yan)時，出熟悉本說明書外，還必須嚴(yan)格執行(xing)國家(jia)有關標(biao)準和操作規(gui)程。可參照GB311-83《高壓輸變設備的(de)絕(jue)緣配合，高壓試(shi)(shi)驗(yan)技術》；《電氣設備預(yu)防性試(shi)(shi)驗(yan)規(gui)程》等。

五、WBYD-200KV交流耐壓試驗變壓器容量選擇

標稱試驗變(bian)壓器容量Pn的(de)確定公式：Pn=kVn 2ωCt×10-9

式(shi)中：

Pn——標稱試(shi)驗變(bian)壓器(qi)容量(kVA)

Vn——試驗變(bian)壓(ya)器的額定輸出高(gao)壓(ya)的有效值(kV)

k ——**系數。k≥1，標稱(cheng)電(dian)壓(ya)Vn≥1MV時，k=2；標稱(cheng)電(dian)壓(ya)較低時，k值可取高(gao)一(yi)些。

Ct——被試(shi)品的電(dian)容量(pF)

ω——角頻率(lv)，ω=2πf， f——試驗(yan)電源的頻率(lv)

被試設備的(de)電(dian)容量Ct可由交流電(dian)橋(qiao)測出。Ct的(de)變化很大，

可由設備的(de)類型(xing)而定。

典型數(shu)據如下：

簡(jian)單的棒式或(huo)懸式絕緣(yuan)子幾十微法(fa)