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便攜式高壓試驗變壓器

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產品名稱: 便攜式(shi)高(gao)壓試驗變(bian)壓器

產品型號: WBYD-10KVA/100KV

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WBYD-10KVA/100KV便攜式高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。便攜式高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-10KVA/100KV便攜式高壓試驗變壓器概述

YDQ系列高(gao)(gao)壓試驗(yan)(yan)變(bian)壓器(qi)是(shi)(shi)根據(ju)《試驗(yan)(yan)變(bian)壓器(qi)》標(biao)準(zhun)，在(zai)油(you)浸式(shi)試驗(yan)(yan)變(bian)壓器(qi)的(de)(de)(de)(de)(de)(de)基礎上而設(she)計生產(chan)(chan)的(de)(de)(de)(de)(de)(de)。SF6氣體具有良好(hao)的(de)(de)(de)(de)(de)(de)電(dian)(dian)氣絕緣性(xing)(xing)能及優異的(de)(de)(de)(de)(de)(de)滅弧(hu)性(xing)(xing)能，其耐(nai)壓強(qiang)度為同一壓力(li)下(xia)氮氣的(de)(de)(de)(de)(de)(de)2.5倍(bei)，擊穿電(dian)(dian)壓的(de)(de)(de)(de)(de)(de)空氣的(de)(de)(de)(de)(de)(de)2.5倍(bei)。在(zai)0.25MPa下(xia)與油(you)的(de)(de)(de)(de)(de)(de)擊穿電(dian)(dian)壓相等，在(zai)0.45MPa壓力(li)下(xia)是(shi)(shi)油(you)的(de)(de)(de)(de)(de)(de)擊穿電(dian)(dian)壓的(de)(de)(de)(de)(de)(de)2倍(bei)，是(shi)(shi)一種(zhong)優于油(you)的(de)(de)(de)(de)(de)(de)新一代超(chao)高(gao)(gao)壓絕緣介質材料(liao)。該產(chan)(chan)品(pin)技術要求完全符合《ZBK-41006-89》標(biao)準(zhun)，它(ta)是(shi)(shi)油(you)浸式(shi)輕型試驗(yan)(yan)變(bian)壓器(qi)的(de)(de)(de)(de)(de)(de)換代產(chan)(chan)品(pin)。該產(chan)(chan)品(pin)具有體積小、重(zhong)量輕、不受氣候變(bian)化影響、電(dian)(dian)暈小、現場搬運無(wu)需靜止可使用，使用壽命長、免(mian)維修等特點(dian)。適(shi)用于電(dian)(dian)力(li)系統、工(gong)(gong)礦企業、科研部(bu)門等對各種(zhong)高(gao)(gao)壓電(dian)(dian)氣設(she)備(bei)、電(dian)(dian)氣元件、絕緣材料(liao)進行工(gong)(gong)頻或直流高(gao)(gao)壓下(xia)的(de)(de)(de)(de)(de)(de)絕緣強(qiang)度試驗(yan)(yan)。

二、WBYD-10KVA/100KV便攜式高壓試驗變壓器產品結構

YDQ系(xi)列高壓(ya)(ya)試(shi)驗(yan)變壓(ya)(ya)器(qi)采用單框芯(xin)式鐵芯(xin)結構(gou)，初級繞(rao)組(zu)繞(rao)在(zai)鐵芯(xin)上，高壓(ya)(ya)繞(rao)組(zu)在(zai)外，這(zhe)種同軸布置減少了(le)漏磁通，因而增大(da)了(le)繞(rao)組(zu)間的(de)耦合(he)。產品的(de)外殼為圓(yuan)柱(zhu)灌式容器(qi)結構(gou)，能耐(nai)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-10KVA/100KV便攜式高壓試驗變壓器工作原理

YDQ系列(lie)高(gao)壓試(shi)(shi)驗變壓器為單(dan)相(xiang)變壓器，聯結組標號Ⅰ.Ⅰ. 用(yong)(yong)工頻220V(10kVA以上為380V)電(dian)源接入 (為本公司生產(chan)的(de)試(shi)(shi)驗變壓器配套專用(yong)(yong)設(she)備(bei)，詳(xiang)細資料請見其具體使用(yong)(yong)說明(ming)書)系列(lie)操(cao)作箱(臺)，經(jing)操(cao)作箱內(nei)自偶調壓器(50kVA以上調壓器外附)調節至(zhi)0～200V(或(huo)0～400V)電(dian)壓輸出至(zhi)YDQ試(shi)(shi)驗變壓器的(de)初級繞組，根據電(dian)磁感應原理，在試(shi)(shi)驗變壓器高(gao)壓繞組可獲得(de)試(shi)(shi)驗所需的(de)高(gao)電(dian)壓。

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

單臺YDQ系列交(jiao)(jiao)直(zhi)流(liu)(liu)(liu)高壓(ya)(ya)試驗變壓(ya)(ya)器(qi)的工(gong)作原理圖(tu)(tu)見圖(tu)(tu)3，圖(tu)(tu)中(zhong)高壓(ya)(ya)套(tao)管中(zhong)裝有高壓(ya)(ya)硅(gui)(gui)堆，串接在高壓(ya)(ya)回路中(zhong)作半波整流(liu)(liu)(liu)，以(yi)獲得直(zhi)流(liu)(liu)(liu)高電壓(ya)(ya)。當用一(yi)短路桿將高壓(ya)(ya)硅(gui)(gui)堆短接時，可獲得工(gong)頻高電壓(ya)(ya)，作為交(jiao)(jiao)流(liu)(liu)(liu)輸出(chu)狀(zhuang)態；取消短路桿時，作為直(zhi)流(liu)(liu)(liu)輸出(chu)狀(zhuang)態。

試驗變壓(ya)(ya)器高壓(ya)(ya)套管(guan)中的高壓(ya)(ya)硅堆未畫出，其(qi)原理(li)與上圖(tu)相同(tong)。

三臺(tai)(tai)(tai)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)串級(ji)(ji)(ji)(ji)(ji)獲得更高電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)接(jie)(jie)線原(yuan)理見圖4。串級(ji)(ji)(ji)(ji)(ji)高壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)有很大的(de)優越(yue)性，因為整(zheng)(zheng)個試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)裝置(zhi)由幾臺(tai)(tai)(tai)單(dan)(dan)(dan)(dan)臺(tai)(tai)(tai)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)組(zu)(zu)成(cheng)，單(dan)(dan)(dan)(dan)臺(tai)(tai)(tai)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)容量小、電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)低(di)、重量輕，便于運輸(shu)(shu)和(he)安裝。它(ta)既(ji)然可串接(jie)(jie)成(cheng)高出幾倍的(de)單(dan)(dan)(dan)(dan)臺(tai)(tai)(tai)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)輸(shu)(shu)出電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)組(zu)(zu)合使(shi)用，又可分開成(cheng)幾套單(dan)(dan)(dan)(dan)臺(tai)(tai)(tai)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)單(dan)(dan)(dan)(dan)獨(du)使(shi)用。整(zheng)(zheng)套裝置(zhi)投資小，經(jing)濟實(shi)惠。圖5中，在**級(ji)(ji)(ji)(ji)(ji)和(he)**級(ji)(ji)(ji)(ji)(ji)的(de)每個單(dan)(dan)(dan)(dan)元試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)中都有一個勵磁(ci)繞組(zu)(zu)A1、C1和(he)A2、C2。在三臺(tai)(tai)(tai)串級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)基本原(yuan)理中，低(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)電(dian)(dian)源加在試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)Ⅰ的(de)初(chu)級(ji)(ji)(ji)(ji)(ji)繞組(zu)(zu)a1x1上，單(dan)(dan)(dan)(dan)臺(tai)(tai)(tai)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)Ⅰ、Ⅱ、Ⅲ的(de)輸(shu)(shu)出電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)都是V。勵磁(ci)繞組(zu)(zu)A1、C1給(gei)**級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)Ⅱ的(de)初(chu)級(ji)(ji)(ji)(ji)(ji)繞組(zu)(zu)供(gong)電(dian)(dian)；**級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)Ⅱ的(de)勵磁(ci)繞組(zu)(zu)A2、C2給(gei)第(di)三級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)Ⅲ的(de)初(chu)級(ji)(ji)(ji)(ji)(ji)繞組(zu)(zu)供(gong)電(dian)(dian)。**級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)Ⅱ和(he)第(di)三級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)Ⅲ的(de)箱(xiang)體分別處(chu)在對地為1V和(he)2V的(de)高電(dian)(dian)位上，所以(yi)箱(xiang)體對地是絕(jue)緣的(de)，試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)Ⅰ的(de)箱(xiang)體是接(jie)(jie)地的(de)。這樣**級(ji)(ji)(ji)(ji)(ji)、**級(ji)(ji)(ji)(ji)(ji)、第(di)三級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)對地的(de)額定輸(shu)(shu)出電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)分別為1V、2V、3V；其額定容量分別為3P、2P、1P。

YDQ系列高壓(ya)試(shi)(shi)驗(yan)變壓(ya)器做(zuo)被試(shi)(shi)品的(de)工頻耐壓(ya)試(shi)(shi)驗(yan)使用接線原理(li)圖見圖5。

圖中：R1—限流電阻(zu)   FRC—阻(zu)容分壓器 RF—球間(jian)隙(xi)保護(hu)電阻(zu) G—球間(jian)隙(xi)   CX—被(bei)試品

注：高壓尾(wei)必須可靠接地

工頻耐壓(ya)試(shi)(shi)驗(yan)中限流(liu)電(dian)阻(zu)(zu)R1應(ying)根據(ju)試(shi)(shi)驗(yan)變壓(ya)器的額定(ding)容量(liang)來選擇。如高(gao)壓(ya)側額定(ding)輸出(chu)電(dian)流(liu)在100～300mA時(shi)(shi)，可取(qu)0.5～1Ω/V(試(shi)(shi)驗(yan)電(dian)壓(ya))；高(gao)壓(ya)側額定(ding)輸出(chu)電(dian)流(liu)為(wei)1A以上時(shi)(shi)，可取(qu)1Ω/V(試(shi)(shi)驗(yan)電(dian)壓(ya))。常用(yong)水電(dian)阻(zu)(zu)作為(wei)限流(liu)電(dian)阻(zu)(zu)，管子(zi)長(chang)度(du)可按(an)150kV/m考慮(lv)，管子(zi)粗細應(ying)具(ju)有足(zu)夠的熱容量(liang)(水阻(zu)(zu)液配制(zhi)方法：用(yong)蒸餾水加入適量(liang)硫(liu)酸銅配制(zhi)成各種不同的阻(zu)(zu)值)。

球(qiu)間(jian)(jian)隙及保(bao)護(hu)電(dian)(dian)(dian)阻(zu)：當電(dian)(dian)(dian)壓超過球(qiu)間(jian)(jian)隙整定(ding)值時(shi)(一(yi)般取試(shi)驗電(dian)(dian)(dian)壓的110%~120%)，球(qiu)間(jian)(jian)隙放電(dian)(dian)(dian)，對被試(shi)品(pin)起到保(bao)護(hu)作用。球(qiu)間(jian)(jian)隙保(bao)護(hu)電(dian)(dian)(dian)阻(zu)可(ke)按1Ω/V(試(shi)驗電(dian)(dian)(dian)壓)選取。

在(zai)(zai)工頻耐(nai)壓(ya)(ya)(ya)試(shi)(shi)驗(yan)中(zhong)，低電(dian)(dian)壓(ya)(ya)(ya)側測量電(dian)(dian)壓(ya)(ya)(ya)(儀(yi)表(biao)(biao)電(dian)(dian)壓(ya)(ya)(ya))不是(shi)非常準確的，其原(yuan)因(yin)是(shi)由于(yu)試(shi)(shi)驗(yan)變(bian)壓(ya)(ya)(ya)器(qi)存(cun)在(zai)(zai)著(zhu)漏(lou)(lou)抗，在(zai)(zai)這個(ge)漏(lou)(lou)抗上必然(ran)存(cun)在(zai)(zai)著(zhu)壓(ya)(ya)(ya)降(jiang)或容升，使(shi)試(shi)(shi)品(pin)上的電(dian)(dian)壓(ya)(ya)(ya)低于(yu)或高(gao)(gao)于(yu)低壓(ya)(ya)(ya)側測量電(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)上反映出來(lai)的電(dian)(dian)壓(ya)(ya)(ya)。工頻耐(nai)壓(ya)(ya)(ya)試(shi)(shi)驗(yan)時，被試(shi)(shi)品(pin)上的電(dian)(dian)壓(ya)(ya)(ya)高(gao)(gao)于(yu)試(shi)(shi)驗(yan)變(bian)壓(ya)(ya)(ya)器(qi)的輸出電(dian)(dian)壓(ya)(ya)(ya)，也(ye)就(jiu)是(shi)所謂容升現象。感應耐(nai)壓(ya)(ya)(ya)試(shi)(shi)驗(yan)時，試(shi)(shi)驗(yan)變(bian)壓(ya)(ya)(ya)器(qi)的漏(lou)(lou)抗必然(ran)存(cun)在(zai)(zai)著(zhu)壓(ya)(ya)(ya)降(jiang)。為了(le)準確測量被試(shi)(shi)品(pin)上所施加的電(dian)(dian)壓(ya)(ya)(ya)，因(yin)此常在(zai)(zai)高(gao)(gao)壓(ya)(ya)(ya)側接(jie)入FRC阻容分壓(ya)(ya)(ya)器(qi)來(lai)測量電(dian)(dian)壓(ya)(ya)(ya)(見(jian)圖5)。

工頻耐壓試(shi)驗操作注意事項(xiang)

1）試驗(yan)人員(yuan)應做(zuo)好分工(gong)，明確(que)相互(hu)間聯系方(fang)法。并(bing)有專門人監護現場(chang)**及觀察試品狀態。

2）被試品(pin)應(ying)先(xian)清掃干凈，并**干燥，以免損壞被試品(pin)和試驗(yan)帶(dai)來的誤差(cha)。

3）對(dui)于大型試驗，一(yi)般都應先(xian)進行空升試驗。即(ji)不接(jie)試品時升壓至試驗電壓，校(xiao)對(dui)各種(zhong)表計，調整球間隙(xi)。

4）升壓(ya)速度不(bu)能(neng)太(tai)快，并必須防止突然(ran)加壓(ya)。例如調壓(ya)器不(bu)在零(ling)(ling)位時(shi)突然(ran)合閘。也不(bu)能(neng)突然(ran)切斷電(dian)源(yuan)，一般(ban)應在調壓(ya)器降至(zhi)零(ling)(ling)位時(shi)拉閘。

5）當電(dian)壓升至試驗電(dian)壓時，開(kai)始計時，到(dao)1min后，迅速降壓到(dao)1/3試驗電(dian)壓以下時，才能拉開(kai)電(dian)源(yuan)。

6）在升壓(ya)或耐壓(ya)試驗過(guo)程(cheng)中(zhong)，如發現下列不(bu)正(zheng)常情況時，應(ying)立即降壓(ya)，切斷電源。停止試驗并(bing)查明(ming)原因：①電壓(ya)表指針(zhen)擺動很大(da)；②發現絕(jue)緣燒焦或冒煙；③被試品內有不(bu)正(zheng)常的(de)聲音。

7）耐壓試(shi)驗前后應測(ce)量絕緣電阻，檢(jian)查絕緣情(qing)況。

試(shi)驗(yan)變壓(ya)(ya)器(qi)在做被(bei)試(shi)品的直流耐壓(ya)(ya)或泄露(lu)試(shi)驗(yan)時接(jie)線原理圖(tu)如圖(tu)6。

注：此試驗應(ying)先抽出短路桿“D”，圖(tu)6中所示。

圖中：VD—高壓(ya)(ya)(ya)硅(gui)堆(dui) R1—限流(liu)電阻(zu) C1—高壓(ya)(ya)(ya)濾波電容(rong) FRC—阻(zu)容(rong)分(fen)壓(ya)(ya)(ya)器 CX—被試品 μA—帶保護微安表

泄(xie)露試驗中限流電(dian)阻R1選擇在額定輸出電(dian)壓(ya)(ya)時(shi)，輸出端短路電(dian)流不超過高(gao)壓(ya)(ya)硅(gui)堆(dui)(dui)的(de)*大整流。如電(dian)壓(ya)(ya)硅(gui)堆(dui)(dui)的(de)*大整流電(dian)流為(wei)100mA時(shi)用于60kV的(de)試驗裝置中，限流電(dian)阻按(an)R1=60/0.1=600kΩ選擇。限流電(dian)阻還應(ying)具有足夠的(de)容量和沿面放(fang)電(dian)距離。

高(gao)壓濾波電容(rong)C1一般選擇在0.01~0.1μF，當被(bei)試(shi)品(pin)的電容(rong)量很大(da)時，C1可省(sheng)略不用。

泄露試驗(yan)的操(cao)作及注意事項

1）試驗前應先檢查被試品是否停電，接地放電，一切對外連線是否擦干凈。要嚴防將(jiang)試驗電壓加到有(you)人工作(zuo)的部位(wei)上去(qu)。

2）接好試驗(yan)裝置的接線(xian)(xian)后(hou)(hou)，應復查(cha)無(wu)誤后(hou)(hou)才可加壓(ya)。應特別注意檢查(cha)高壓(ya)設備及(ji)引(yin)線(xian)(xian)與地(di)、與操作人員的**距離，被試品的外(wai)殼是否可靠(kao)接地(di)，要按(an)**規(gui)程中所(suo)規(gui)定(ding)的內容進(jin)行(xing)試驗(yan)。

3）對于大電容量設備應緩慢升壓，防止被試品的充電電流(liu)燒壞微安表。必要時(shi)應分(fen)級加壓，分(fen)別讀取各級電壓下微安表的穩定讀數(shu)。

4）試(shi)驗(yan)過程中(zhong)，應(ying)密(mi)切(qie)監視被試(shi)品、試(shi)驗(yan)裝置、微(wei)安表，一旦發生擊穿(chuan)、閃(shan)爍等異常現象應(ying)立即(ji)降壓，切(qie)斷(duan)電源(yuan)，并查(cha)明原因，詳細記錄。

5）試(shi)驗完畢，降壓，切(qie)斷電源后(hou)應將(jiang)被試(shi)品及試(shi)驗裝(zhuang)置本身充分放電。

四、WBYD-10KVA/100KV便攜式高壓試驗變壓器注意事項

1、按照您所進行(xing)的(de)(de)(de)試驗(yan)接(jie)(jie)好工(gong)作線路(lu)。試驗(yan)變壓器的(de)(de)(de)外殼以及(ji)操作系統的(de)(de)(de)外殼必(bi)須可靠接(jie)(jie)地。試驗(yan)變壓器高(gao)壓繞(rao)組的(de)(de)(de)X端(高(gao)壓尾(wei))以及(ji)測量繞(rao)組的(de)(de)(de)F端必(bi)須可靠接(jie)(jie)地。

2、做串級(ji)試(shi)驗(yan)(yan)時，**級(ji)、第(di)三級(ji)試(shi)驗(yan)(yan)變壓(ya)(ya)器的(de)低壓(ya)(ya)繞組(zu)的(de)X端，測量(liang)繞組(zu)的(de)F端以及高壓(ya)(ya)繞組(zu)的(de)X端(高壓(ya)(ya)尾)均接本級(ji)試(shi)驗(yan)(yan)變壓(ya)(ya)器的(de)外殼(ke)。**級(ji)、第(di)三級(ji)試(shi)驗(yan)(yan)變壓(ya)(ya)器的(de)外殼(ke)必(bi)須通(tong)過絕緣支架接地。

3、接通電(dian)源前，操作系(xi)統的調(diao)壓(ya)器(qi)必(bi)須(xu)調(diao)到零位(wei)后方可接通電(dian)源，合閘，開始(shi)升壓(ya)。

4、從(cong)零開始均勻旋(xuan)轉調壓(ya)(ya)(ya)(ya)(ya)器手(shou)輪升(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)。升(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)方(fang)(fang)法(fa)有：快速(su)(su)升(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)法(fa)，即(ji)(ji)20s逐(zhu)級升(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)法(fa)；慢(man)(man)速(su)(su)升(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)法(fa)，即(ji)(ji)60s逐(zhu)級升(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)法(fa)；極慢(man)(man)速(su)(su)升(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)法(fa)供(gong)選用。電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)從(cong)零開始按一定(ding)的(de)(de)升(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)方(fang)(fang)式(shi)和速(su)(su)度上升(sheng)(sheng)到(dao)您(nin)所(suo)需(xu)的(de)(de)額定(ding)試(shi)驗(yan)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)75%后，在以(yi)每秒(miao)2%額定(ding)試(shi)驗(yan)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)速(su)(su)度升(sheng)(sheng)到(dao)您(nin)所(suo)需(xu)的(de)(de)額定(ding)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)，并密切注意測(ce)量儀(yi)表的(de)(de)指(zhi)示以(yi)及被試(shi)品的(de)(de)情況。升(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)過程(cheng)中或試(shi)驗(yan)過程(cheng)中如(ru)發現測(ce)量儀(yi)表的(de)(de)指(zhi)示及被試(shi)品情況異常，應立即(ji)(ji)降壓(ya)(ya)(ya)(ya)(ya)，切斷電(dian)(dian)源，查明情況。

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

6、本產品不得超過額定參(can)數使用。除試驗必須(xu)外，決不允許全電壓通(tong)電或(huo)斷電。

7、再升壓或耐壓試(shi)驗過程中，如發現以下不(bu)正常(chang)情(qing)況時，應(ying)立即降壓，切(qie)斷電源，停止試(shi)驗并查明原因。

⑴電(dian)壓表指針擺(bai)動(或(huo)數字跳動)很大(da)

⑵電(dian)流表直線上升

被試品內有不(bu)正常的(de)聲音

8、圖1中第(di)9項系壓力(li)(li)閥及壓力(li)(li)表，為長期關閉(bi)狀態。每6個(ge)月(yue)開閥一(yi)次，以檢(jian)查SF6壓力(li)(li)，應(ying)不小于(yu)(yu)0.2MPa(檢(jian)查壓力(li)(li)后立即(ji)關閉(bi)閥門)，低于(yu)(yu)0.2MPa時應(ying)加SF6氣體，以增加氣絕緣。

9、耐壓實驗前后應(ying)測量被試設備的絕(jue)緣(yuan)電阻，檢(jian)查(cha)絕(jue)緣(yuan)情況。

10、當(dang)試驗變壓器長期不使用時，應放置于(yu)通(tong)風(feng)、干燥、無陽光直射的地方。

11、該(gai)產品(pin)不允許(xu)在高于45℃的溫度(du)下長(chang)期存放、使用、放氣(qi)。

12、運輸(shu)搬(ban)運途中不得重力(li)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(ben)產品做高壓試驗(yan)時，出熟悉本(ben)說明書外，還必須嚴(yan)格(ge)執(zhi)行國家有(you)關標準和操作(zuo)規程(cheng)。可參照(zhao)GB311-83《高壓輸(shu)變(bian)設備(bei)的絕緣配合(he)，高壓試驗(yan)技(ji)術》；《電(dian)氣(qi)設備(bei)預防性試驗(yan)規程(cheng)》等。

五、WBYD-10KVA/100KV便攜式高壓試驗變壓器容量選擇

標(biao)稱(cheng)試(shi)驗變壓(ya)器容量Pn的確定(ding)公式：Pn=kVn 2ωCt×10-9

式(shi)中：

Pn——標稱試驗變壓器容量(kVA)

Vn——試驗變壓(ya)器的額定輸出(chu)高壓(ya)的有(you)效值(kV)

k ——**系數。k≥1，標(biao)稱(cheng)電壓(ya)Vn≥1MV時，k=2；標(biao)稱(cheng)電壓(ya)較低(di)時，k值可(ke)取(qu)高一(yi)些。

Ct——被試品的電容量(liang)(pF)

ω——角頻(pin)率，ω=2πf， f——試驗(yan)電源的(de)頻(pin)率

被試設備的(de)電容量Ct可(ke)由(you)交流電橋測出。Ct的(de)變化很大(da)，

可由設備的(de)類型而定。

典型數據如下：

簡單的棒(bang)式或懸式絕緣(yuan)子幾十(shi)微法(fa)