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試驗變壓器

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產品名稱: 試驗變壓器

產品型號: WBYD-75KVA/150KV

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產品簡介

WBYD-75KVA/150KV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。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(yi)、WBYD-75KVA/150KV試驗變壓器概述

YDQ系(xi)列高壓(ya)(ya)(ya)試驗(yan)(yan)變壓(ya)(ya)(ya)器(qi)(qi)(qi)是根據《試驗(yan)(yan)變壓(ya)(ya)(ya)器(qi)(qi)(qi)》標準(zhun)，在油(you)(you)(you)浸式(shi)試驗(yan)(yan)變壓(ya)(ya)(ya)器(qi)(qi)(qi)的(de)(de)基礎上(shang)而設計生(sheng)產的(de)(de)。SF6氣(qi)(qi)體(ti)具有(you)良好的(de)(de)電(dian)氣(qi)(qi)絕(jue)緣(yuan)性能及(ji)優異(yi)的(de)(de)滅弧性能，其耐壓(ya)(ya)(ya)強度為(wei)同一(yi)壓(ya)(ya)(ya)力下(xia)氮氣(qi)(qi)的(de)(de)2.5倍，擊穿電(dian)壓(ya)(ya)(ya)的(de)(de)空氣(qi)(qi)的(de)(de)2.5倍。在0.25MPa下(xia)與油(you)(you)(you)的(de)(de)擊穿電(dian)壓(ya)(ya)(ya)相等，在0.45MPa壓(ya)(ya)(ya)力下(xia)是油(you)(you)(you)的(de)(de)擊穿電(dian)壓(ya)(ya)(ya)的(de)(de)2倍，是一(yi)種優于油(you)(you)(you)的(de)(de)新一(yi)代超(chao)高壓(ya)(ya)(ya)絕(jue)緣(yuan)介(jie)質材料(liao)。該產品技術要求完全符合《ZBK-41006-89》標準(zhun)，它是油(you)(you)(you)浸式(shi)輕(qing)型試驗(yan)(yan)變壓(ya)(ya)(ya)器(qi)(qi)(qi)的(de)(de)換代產品。該產品具有(you)體(ti)積(ji)小、重量輕(qing)、不受氣(qi)(qi)候變化影響、電(dian)暈小、現場搬運(yun)無需(xu)靜止可(ke)使(shi)用(yong)，使(shi)用(yong)壽(shou)命(ming)長(chang)、免維修(xiu)等特點。適用(yong)于電(dian)力系(xi)統、工(gong)礦(kuang)企業、科研部門等對各種高壓(ya)(ya)(ya)電(dian)氣(qi)(qi)設備、電(dian)氣(qi)(qi)元件、絕(jue)緣(yuan)材料(liao)進行工(gong)頻或直流高壓(ya)(ya)(ya)下(xia)的(de)(de)絕(jue)緣(yuan)強度試驗(yan)(yan)。

二、WBYD-75KVA/150KV試驗變壓器產品結構

YDQ系(xi)列高壓(ya)試驗變壓(ya)器采用單框(kuang)芯(xin)式鐵(tie)(tie)芯(xin)結構，初級繞(rao)(rao)組(zu)繞(rao)(rao)在(zai)鐵(tie)(tie)芯(xin)上，高壓(ya)繞(rao)(rao)組(zu)在(zai)外，這種同軸(zhou)布(bu)置減少了漏磁通，因而(er)增(zeng)大了繞(rao)(rao)組(zu)間的(de)耦合。產品的(de)外殼為圓柱灌(guan)式容器結構，能耐受0.8MPa以上壓(ya)力。其結構見圖(tu)1：

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

三、WBYD-75KVA/150KV試驗變壓器工作原理

YDQ系(xi)列高壓(ya)(ya)(ya)試(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)為單相變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)，聯(lian)結組(zu)標號Ⅰ.Ⅰ. 用(yong)工(gong)頻220V(10kVA以上為380V)電(dian)源接入(ru) (為本公司生產(chan)的試(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)配套專用(yong)設備，詳細(xi)資料請見其具(ju)體使用(yong)說明書(shu))系(xi)列操(cao)作(zuo)箱(臺)，經操(cao)作(zuo)箱內自偶調(diao)(diao)壓(ya)(ya)(ya)器(qi)(qi)(qi)(50kVA以上調(diao)(diao)壓(ya)(ya)(ya)器(qi)(qi)(qi)外附)調(diao)(diao)節至(zhi)0～200V(或0～400V)電(dian)壓(ya)(ya)(ya)輸出至(zhi)YDQ試(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)的初級繞組(zu)，根(gen)據電(dian)磁(ci)感應原(yuan)理，在(zai)試(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)高壓(ya)(ya)(ya)繞組(zu)可(ke)獲得(de)試(shi)驗(yan)(yan)所需的高電(dian)壓(ya)(ya)(ya)。

單臺YDQ系列(lie)高(gao)壓試驗變壓器的工作(zuo)原理(li)圖(tu)見圖(tu)2。

單臺YDQ系列交(jiao)直流高(gao)(gao)壓(ya)(ya)(ya)試(shi)驗(yan)變壓(ya)(ya)(ya)器的工作原理圖(tu)見圖(tu)3，圖(tu)中高(gao)(gao)壓(ya)(ya)(ya)套管中裝有高(gao)(gao)壓(ya)(ya)(ya)硅(gui)(gui)堆，串(chuan)接在高(gao)(gao)壓(ya)(ya)(ya)回路中作半波整流，以獲得直流高(gao)(gao)電(dian)壓(ya)(ya)(ya)。當用一(yi)短(duan)路桿將高(gao)(gao)壓(ya)(ya)(ya)硅(gui)(gui)堆短(duan)接時(shi)，可獲得工頻(pin)高(gao)(gao)電(dian)壓(ya)(ya)(ya)，作為交(jiao)流輸出(chu)(chu)狀態；取(qu)消短(duan)路桿時(shi)，作為直流輸出(chu)(chu)狀態。

試驗(yan)變(bian)壓器高(gao)壓套管(guan)中(zhong)的高(gao)壓硅(gui)堆(dui)未畫(hua)出(chu)，其原理與上圖相同。

三(san)(san)臺(tai)(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)串級(ji)(ji)獲得更高電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)接(jie)(jie)線(xian)原(yuan)理(li)見圖4。串級(ji)(ji)高壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)有很大的(de)(de)(de)優越性(xing)，因為(wei)(wei)整個試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)裝(zhuang)(zhuang)置由幾(ji)(ji)臺(tai)(tai)(tai)單臺(tai)(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)組(zu)(zu)(zu)(zu)成(cheng)，單臺(tai)(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)容(rong)量(liang)小、電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)低、重量(liang)輕，便于運輸和(he)安(an)裝(zhuang)(zhuang)。它既(ji)然可(ke)串接(jie)(jie)成(cheng)高出幾(ji)(ji)倍的(de)(de)(de)單臺(tai)(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)輸出電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)組(zu)(zu)(zu)(zu)合(he)使用(yong)，又可(ke)分開成(cheng)幾(ji)(ji)套單臺(tai)(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)單獨使用(yong)。整套裝(zhuang)(zhuang)置投(tou)資小，經(jing)濟實惠。圖5中(zhong)，在**級(ji)(ji)和(he)**級(ji)(ji)的(de)(de)(de)每(mei)個單元(yuan)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)中(zhong)都有一個勵磁繞組(zu)(zu)(zu)(zu)A1、C1和(he)A2、C2。在三(san)(san)臺(tai)(tai)(tai)串級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)基本原(yuan)理(li)中(zhong)，低壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)電(dian)源加在試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅰ的(de)(de)(de)初級(ji)(ji)繞組(zu)(zu)(zu)(zu)a1x1上(shang)，單臺(tai)(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅰ、Ⅱ、Ⅲ的(de)(de)(de)輸出電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)都是V。勵磁繞組(zu)(zu)(zu)(zu)A1、C1給**級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅱ的(de)(de)(de)初級(ji)(ji)繞組(zu)(zu)(zu)(zu)供(gong)電(dian)；**級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅱ的(de)(de)(de)勵磁繞組(zu)(zu)(zu)(zu)A2、C2給第(di)(di)三(san)(san)級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅲ的(de)(de)(de)初級(ji)(ji)繞組(zu)(zu)(zu)(zu)供(gong)電(dian)。**級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅱ和(he)第(di)(di)三(san)(san)級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅲ的(de)(de)(de)箱體(ti)分別(bie)(bie)處在對(dui)地(di)為(wei)(wei)1V和(he)2V的(de)(de)(de)高電(dian)位上(shang)，所以箱體(ti)對(dui)地(di)是絕緣的(de)(de)(de)，試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅰ的(de)(de)(de)箱體(ti)是接(jie)(jie)地(di)的(de)(de)(de)。這樣**級(ji)(ji)、**級(ji)(ji)、第(di)(di)三(san)(san)級(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)對(dui)地(di)的(de)(de)(de)額定輸出電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)分別(bie)(bie)為(wei)(wei)1V、2V、3V；其額定容(rong)量(liang)分別(bie)(bie)為(wei)(wei)3P、2P、1P。

YDQ系列高壓(ya)試(shi)驗(yan)變壓(ya)器做被試(shi)品的工頻耐壓(ya)試(shi)驗(yan)使用接(jie)線原理圖見圖5。

圖中(zhong)：R1—限流電阻   FRC—阻容分壓器(qi) RF—球間隙保護電阻 G—球間隙 CX—被試(shi)品

注：高(gao)壓尾必須(xu)可(ke)靠(kao)接地

工頻(pin)耐壓(ya)試驗(yan)中限(xian)流電阻R1應根(gen)據試驗(yan)變壓(ya)器的額(e)定(ding)容量(liang)來選擇。如高(gao)壓(ya)側(ce)額(e)定(ding)輸出電流在(zai)100～300mA時，可取0.5～1Ω/V(試驗(yan)電壓(ya))；高(gao)壓(ya)側(ce)額(e)定(ding)輸出電流為1A以上時，可取1Ω/V(試驗(yan)電壓(ya))。常用(yong)水電阻作為限(xian)流電阻，管子長度(du)可按150kV/m考慮，管子粗細應具有足夠(gou)的熱(re)容量(liang)(水阻液(ye)配制(zhi)方法：用(yong)蒸餾(liu)水加入適(shi)量(liang)硫酸銅配制(zhi)成各種不同的阻值)。

球間(jian)隙(xi)(xi)及保護電(dian)阻：當電(dian)壓超過(guo)球間(jian)隙(xi)(xi)整定值時(一般取試驗(yan)(yan)電(dian)壓的110%~120%)，球間(jian)隙(xi)(xi)放電(dian)，對被(bei)試品(pin)起到保護作用。球間(jian)隙(xi)(xi)保護電(dian)阻可按(an)1Ω/V(試驗(yan)(yan)電(dian)壓)選取。

在(zai)工(gong)(gong)頻耐壓(ya)(ya)(ya)(ya)(ya)試驗(yan)(yan)中，低電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)側(ce)(ce)測量電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(儀表(biao)(biao)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya))不是(shi)(shi)非常準(zhun)確(que)的(de)，其原(yuan)因(yin)是(shi)(shi)由于試驗(yan)(yan)變(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)存(cun)在(zai)著漏(lou)抗(kang)，在(zai)這個(ge)漏(lou)抗(kang)上必然存(cun)在(zai)著壓(ya)(ya)(ya)(ya)(ya)降或(huo)容升，使試品(pin)上的(de)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)低于或(huo)高(gao)(gao)于低壓(ya)(ya)(ya)(ya)(ya)側(ce)(ce)測量電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)(biao)上反(fan)映出(chu)來(lai)的(de)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)。工(gong)(gong)頻耐壓(ya)(ya)(ya)(ya)(ya)試驗(yan)(yan)時，被(bei)試品(pin)上的(de)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)高(gao)(gao)于試驗(yan)(yan)變(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)的(de)輸出(chu)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)，也(ye)就是(shi)(shi)所謂容升現象。感應耐壓(ya)(ya)(ya)(ya)(ya)試驗(yan)(yan)時，試驗(yan)(yan)變(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)的(de)漏(lou)抗(kang)必然存(cun)在(zai)著壓(ya)(ya)(ya)(ya)(ya)降。為(wei)了準(zhun)確(que)測量被(bei)試品(pin)上所施加的(de)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)，因(yin)此常在(zai)高(gao)(gao)壓(ya)(ya)(ya)(ya)(ya)側(ce)(ce)接入FRC阻容分壓(ya)(ya)(ya)(ya)(ya)器(qi)來(lai)測量電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(見圖5)。

工(gong)頻耐壓試驗操作注意事項(xiang)

1）試驗人員應做好(hao)分(fen)工，明(ming)確相互間聯系方法。并有專門人監護(hu)現場**及(ji)觀察(cha)試品狀態。

2）被試(shi)品應先清掃干凈，并**干燥(zao)，以(yi)免損(sun)壞被試(shi)品和試(shi)驗帶來的誤差。

3）對于大型試(shi)驗，一般都(dou)應先(xian)進行空升試(shi)驗。即(ji)不接試(shi)品時升壓至試(shi)驗電壓，校(xiao)對各(ge)種表(biao)計，調整球(qiu)間隙(xi)。

4）升(sheng)壓速度不能太快，并(bing)必須(xu)防止(zhi)突然(ran)加壓。例如調壓器不在零位(wei)時突然(ran)合閘。也不能突然(ran)切斷電(dian)源(yuan)，一般應(ying)在調壓器降至零位(wei)時拉閘。

5）當(dang)電(dian)壓升(sheng)至試(shi)驗電(dian)壓時，開始(shi)計時，到1min后(hou)，迅(xun)速(su)降壓到1/3試(shi)驗電(dian)壓以下時，才能拉開電(dian)源。

6）在升壓(ya)或耐(nai)壓(ya)試驗(yan)過程中(zhong)，如發現下列不正常情況時，應立(li)即降(jiang)壓(ya)，切斷電源。停止試驗(yan)并查明(ming)原(yuan)因：①電壓(ya)表指針擺動很(hen)大；②發現絕緣燒焦或冒(mao)煙；③被試品內有不正常的聲音。

7）耐壓試驗前后應(ying)測量絕緣(yuan)電阻，檢查絕緣(yuan)情況。

試(shi)驗變(bian)壓(ya)器在做(zuo)被(bei)試(shi)品的直流耐(nai)壓(ya)或泄(xie)露試(shi)驗時接線原(yuan)理圖(tu)如圖(tu)6。

注：此(ci)試驗應先(xian)抽出(chu)短路桿“D”，圖6中所示(shi)。

圖中：VD—高壓硅堆   R1—限(xian)流電(dian)阻 C1—高壓濾波(bo)電(dian)容(rong) FRC—阻容(rong)分(fen)壓器 CX—被試品 μA—帶保護(hu)微安表(biao)

泄露試驗中限流(liu)(liu)電(dian)(dian)阻(zu)R1選(xuan)擇(ze)在(zai)額定輸(shu)(shu)出電(dian)(dian)壓時(shi)，輸(shu)(shu)出端短路電(dian)(dian)流(liu)(liu)不超過高(gao)壓硅堆的*大(da)整(zheng)流(liu)(liu)。如電(dian)(dian)壓硅堆的*大(da)整(zheng)流(liu)(liu)電(dian)(dian)流(liu)(liu)為100mA時(shi)用于60kV的試驗裝置中，限流(liu)(liu)電(dian)(dian)阻(zu)按R1=60/0.1=600kΩ選(xuan)擇(ze)。限流(liu)(liu)電(dian)(dian)阻(zu)還應具有足(zu)夠的容量和沿面放電(dian)(dian)距離。

高壓濾(lv)波電(dian)容C1一般選(xuan)擇在0.01~0.1μF，當(dang)被(bei)試品(pin)的電(dian)容量很大時，C1可(ke)省略(lve)不(bu)用。

泄露試驗的操作(zuo)及注意事項

1）試(shi)驗(yan)前應先檢查被試(shi)品(pin)是(shi)否(fou)停電，接地放(fang)電，一切對外連線是(shi)否(fou)擦干凈。要嚴防(fang)將(jiang)試(shi)驗(yan)電壓(ya)加到有人(ren)工作的部位上去。

2）接好(hao)試驗(yan)裝置(zhi)的接線后，應復查(cha)無誤后才可加壓(ya)。應特別注意檢(jian)查(cha)高壓(ya)設備及引線與地(di)、與操作(zuo)人員的**距離，被(bei)試品的外殼是否可靠接地(di)，要(yao)按**規程中(zhong)所規定的內容進行試驗(yan)。

3）對于大電(dian)容量設(she)備應緩慢升壓，防止被試(shi)品的(de)充電(dian)電(dian)流燒壞微安表(biao)。必要時應分級加壓，分別讀取(qu)各級電(dian)壓下微安表(biao)的(de)穩定(ding)讀數(shu)。

4）試(shi)驗(yan)過程(cheng)中，應密切監視被試(shi)品(pin)、試(shi)驗(yan)裝置、微(wei)安表，一旦發生(sheng)擊穿、閃爍等異常現象應立即降壓，切斷電源，并查明原因，詳(xiang)細記錄。

5）試驗完(wan)畢，降(jiang)壓，切(qie)斷電(dian)源后應(ying)將(jiang)被試品及試驗裝置本身充(chong)分放電(dian)。

四、WBYD-75KVA/150KV試驗變壓器注意事項

1、按照您所進行的(de)試(shi)驗接好工作線路。試(shi)驗變壓(ya)器的(de)外(wai)殼以及操作系統的(de)外(wai)殼必須可靠(kao)接地。試(shi)驗變壓(ya)器高(gao)壓(ya)繞組的(de)X端(高(gao)壓(ya)尾)以及測量繞組的(de)F端必須可靠(kao)接地。

2、做(zuo)串級(ji)(ji)試(shi)驗時，**級(ji)(ji)、第(di)(di)三(san)級(ji)(ji)試(shi)驗變壓(ya)(ya)器(qi)的低壓(ya)(ya)繞(rao)組的X端，測(ce)量(liang)繞(rao)組的F端以及(ji)高壓(ya)(ya)繞(rao)組的X端(高壓(ya)(ya)尾)均接(jie)(jie)本級(ji)(ji)試(shi)驗變壓(ya)(ya)器(qi)的外(wai)(wai)殼(ke)。**級(ji)(ji)、第(di)(di)三(san)級(ji)(ji)試(shi)驗變壓(ya)(ya)器(qi)的外(wai)(wai)殼(ke)必須(xu)通過絕緣支架接(jie)(jie)地。

3、接通(tong)電源(yuan)前，操作系統的調壓(ya)器必須(xu)調到零(ling)位后(hou)方(fang)可(ke)接通(tong)電源(yuan)，合(he)閘(zha)，開始(shi)升(sheng)壓(ya)。

4、從零開(kai)始(shi)均勻(yun)旋(xuan)轉調壓(ya)(ya)(ya)器手(shou)輪升(sheng)壓(ya)(ya)(ya)。升(sheng)壓(ya)(ya)(ya)方法(fa)有：快速(su)升(sheng)壓(ya)(ya)(ya)法(fa)，即(ji)(ji)20s逐級(ji)升(sheng)壓(ya)(ya)(ya)法(fa)；慢速(su)升(sheng)壓(ya)(ya)(ya)法(fa)，即(ji)(ji)60s逐級(ji)升(sheng)壓(ya)(ya)(ya)法(fa)；極(ji)慢速(su)升(sheng)壓(ya)(ya)(ya)法(fa)供(gong)選用。電壓(ya)(ya)(ya)從零開(kai)始(shi)按一(yi)定(ding)(ding)的升(sheng)壓(ya)(ya)(ya)方式和速(su)度上升(sheng)到您(nin)所需的額定(ding)(ding)試(shi)驗電壓(ya)(ya)(ya)的75%后，在以每秒(miao)2%額定(ding)(ding)試(shi)驗電壓(ya)(ya)(ya)的速(su)度升(sheng)到您(nin)所需的額定(ding)(ding)電壓(ya)(ya)(ya)，并密切注意測量儀表的指(zhi)示(shi)以及被試(shi)品(pin)的情況(kuang)。升(sheng)壓(ya)(ya)(ya)過(guo)程中或試(shi)驗過(guo)程中如發現測量儀表的指(zhi)示(shi)及被試(shi)品(pin)情況(kuang)異常(chang)，應立(li)即(ji)(ji)降壓(ya)(ya)(ya)，切斷電源，查明情況(kuang)。

5、試驗完畢后(hou)，應在數(shu)秒(miao)內勻速的將調壓器返(fan)回至零位，然后(hou)切(qie)斷電源。

6、本(ben)產品不得超過額定(ding)參數(shu)使用。除試驗必須(xu)外(wai)，決(jue)不允許全電壓通電或斷電。

7、再升(sheng)壓(ya)或耐壓(ya)試(shi)(shi)驗(yan)過程中，如發(fa)現(xian)以下不正常情況時，應立即(ji)降壓(ya)，切斷電源，停止試(shi)(shi)驗(yan)并查明原因。

⑴電壓表指針(zhen)擺動(dong)(dong)(或數字跳動(dong)(dong))很(hen)大

⑵電(dian)流表直線(xian)上(shang)升

被試品(pin)內有不正(zheng)常(chang)的聲音

8、圖1中(zhong)第9項系壓(ya)力(li)(li)閥及壓(ya)力(li)(li)表，為長期關閉狀態。每6個月開閥一次，以檢查SF6壓(ya)力(li)(li)，應不小(xiao)于0.2MPa(檢查壓(ya)力(li)(li)后立(li)即(ji)關閉閥門)，低于0.2MPa時應加(jia)SF6氣體，以增加(jia)氣絕緣。

9、耐壓(ya)實驗前后應(ying)測量被(bei)試設(she)備的絕(jue)緣(yuan)電阻(zu)，檢(jian)查絕(jue)緣(yuan)情況。

10、當試驗變壓(ya)器長期(qi)不使用時，應放置于(yu)通風、干燥、無陽光直射(she)的地(di)方(fang)。

11、該產(chan)品不允許在高于45℃的溫度下長期(qi)存放、使用、放氣。

12、運輸搬運途(tu)中不得重力沖擊。

13、產品緊固件及壓力(li)閥、壓力(li)表不得擅自松動。

14、使用本產品做高壓(ya)試驗(yan)(yan)時(shi)，出(chu)熟悉(xi)本說明書外，還必須(xu)嚴格執行國家有(you)關標(biao)準和操(cao)作規程(cheng)。可參照(zhao)GB311-83《高壓(ya)輸變設備的絕緣配合(he)，高壓(ya)試驗(yan)(yan)技(ji)術》；《電氣(qi)設備預防性試驗(yan)(yan)規程(cheng)》等(deng)。

五、WBYD-75KVA/150KV試驗變壓器容量選擇

標稱試驗(yan)變(bian)壓器容(rong)量Pn的(de)確定公(gong)式：Pn=kVn 2ωCt×10-9

式中(zhong)：

Pn——標(biao)稱試驗(yan)變壓器容量(kVA)

Vn——試驗變壓器(qi)的(de)(de)額定(ding)輸(shu)出高壓的(de)(de)有效值(zhi)(kV)

k ——**系(xi)數。k≥1，標稱(cheng)電壓Vn≥1MV時，k=2；標稱(cheng)電壓較低時，k值可取高一些。

Ct——被試品的電容量(pF)

ω——角頻率(lv)，ω=2πf， f——試驗電(dian)源的(de)頻率(lv)

被試(shi)設備的電(dian)容量(liang)Ct可由交流電(dian)橋(qiao)測出。Ct的變化很大(da)，

可(ke)由設備的類型而(er)定。

典型數據如(ru)下：

簡單(dan)的棒式(shi)或懸(xuan)式(shi)絕緣(yuan)子幾十微(wei)法