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產品名稱: 交直流試驗變壓(ya)器(qi)

產品型號: WBYD-350KV

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WBYD-350KV交直流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。交直流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-350KV交直流試驗變壓器概述

YDQ系(xi)列(lie)高壓(ya)(ya)(ya)(ya)(ya)試(shi)驗變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)是根據《試(shi)驗變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)》標準(zhun)，在(zai)油(you)(you)浸式(shi)試(shi)驗變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)的(de)(de)基礎(chu)上(shang)而設計生產(chan)的(de)(de)。SF6氣(qi)體具有良好的(de)(de)電(dian)(dian)(dian)氣(qi)絕緣性(xing)能及(ji)優(you)異(yi)的(de)(de)滅弧性(xing)能，其耐(nai)壓(ya)(ya)(ya)(ya)(ya)強度為同一(yi)壓(ya)(ya)(ya)(ya)(ya)力(li)下(xia)氮氣(qi)的(de)(de)2.5倍(bei)，擊(ji)穿電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)空氣(qi)的(de)(de)2.5倍(bei)。在(zai)0.25MPa下(xia)與油(you)(you)的(de)(de)擊(ji)穿電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)相(xiang)等，在(zai)0.45MPa壓(ya)(ya)(ya)(ya)(ya)力(li)下(xia)是油(you)(you)的(de)(de)擊(ji)穿電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)2倍(bei)，是一(yi)種(zhong)(zhong)優(you)于油(you)(you)的(de)(de)新一(yi)代(dai)超(chao)高壓(ya)(ya)(ya)(ya)(ya)絕緣介(jie)質材(cai)(cai)料。該(gai)產(chan)品(pin)(pin)技術(shu)要求完全符合《ZBK-41006-89》標準(zhun)，它是油(you)(you)浸式(shi)輕(qing)型(xing)試(shi)驗變(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)的(de)(de)換代(dai)產(chan)品(pin)(pin)。該(gai)產(chan)品(pin)(pin)具有體積小(xiao)(xiao)、重量輕(qing)、不受氣(qi)候變(bian)(bian)(bian)化影(ying)響、電(dian)(dian)(dian)暈小(xiao)(xiao)、現場搬運無需靜止(zhi)可使(shi)用(yong)，使(shi)用(yong)壽命長、免維修等特點。適用(yong)于電(dian)(dian)(dian)力(li)系(xi)統(tong)、工礦企業、科研部門等對各(ge)種(zhong)(zhong)高壓(ya)(ya)(ya)(ya)(ya)電(dian)(dian)(dian)氣(qi)設備、電(dian)(dian)(dian)氣(qi)元件、絕緣材(cai)(cai)料進行(xing)工頻或直流高壓(ya)(ya)(ya)(ya)(ya)下(xia)的(de)(de)絕緣強度試(shi)驗。

二、WBYD-350KV交直流試驗變壓器產品結構

YDQ系列高壓試驗變壓器采(cai)用單框芯(xin)式鐵(tie)芯(xin)結(jie)構，初級(ji)繞(rao)組(zu)繞(rao)在鐵(tie)芯(xin)上，高壓繞(rao)組(zu)在外，這種同軸布(bu)置減少了漏磁通，因而增大了繞(rao)組(zu)間(jian)的耦合。產(chan)品的外殼為圓柱灌式容器結(jie)構，能耐受0.8MPa以(yi)上壓力。其結(jie)構見圖1：

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

三、WBYD-350KV交直流試驗變壓器工作原理

YDQ系(xi)列高壓(ya)(ya)(ya)(ya)試驗(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)為單相變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)，聯結組標號Ⅰ.Ⅰ. 用(yong)工頻220V(10kVA以(yi)上為380V)電(dian)源(yuan)接(jie)入 (為本公司生產的試驗(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)配套專用(yong)設備，詳細資料請見其(qi)具體使用(yong)說明書(shu))系(xi)列操作箱(臺)，經操作箱內自偶調(diao)壓(ya)(ya)(ya)(ya)器(qi)(qi)(50kVA以(yi)上調(diao)壓(ya)(ya)(ya)(ya)器(qi)(qi)外附)調(diao)節至(zhi)(zhi)0～200V(或0～400V)電(dian)壓(ya)(ya)(ya)(ya)輸出至(zhi)(zhi)YDQ試驗(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)的初級繞(rao)組，根據電(dian)磁感應原理(li)，在(zai)試驗(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)高壓(ya)(ya)(ya)(ya)繞(rao)組可(ke)獲得試驗(yan)所需(xu)的高電(dian)壓(ya)(ya)(ya)(ya)。

單臺YDQ系(xi)列高(gao)壓試驗變壓器(qi)的工作原理圖見圖2。

單臺YDQ系(xi)列交(jiao)(jiao)直流(liu)(liu)高壓(ya)試驗變壓(ya)器的(de)工作原理(li)圖見圖3，圖中(zhong)(zhong)高壓(ya)套管中(zhong)(zhong)裝有高壓(ya)硅堆(dui)，串(chuan)接(jie)在高壓(ya)回(hui)路(lu)中(zhong)(zhong)作半波整流(liu)(liu)，以(yi)獲(huo)得(de)直流(liu)(liu)高電壓(ya)。當用一短路(lu)桿(gan)將高壓(ya)硅堆(dui)短接(jie)時，可獲(huo)得(de)工頻高電壓(ya)，作為(wei)交(jiao)(jiao)流(liu)(liu)輸出(chu)狀(zhuang)態；取消短路(lu)桿(gan)時，作為(wei)直流(liu)(liu)輸出(chu)狀(zhuang)態。

試驗變壓器高壓套(tao)管中的高壓硅堆(dui)未畫出(chu)，其原理與上(shang)圖相同。

三臺(tai)(tai)(tai)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)串級(ji)(ji)(ji)(ji)(ji)獲得更(geng)高(gao)電(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)接(jie)線原(yuan)理見圖(tu)4。串級(ji)(ji)(ji)(ji)(ji)高(gao)壓(ya)(ya)(ya)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)有很大的(de)(de)(de)優越(yue)性(xing)，因為(wei)整個(ge)試(shi)驗(yan)(yan)(yan)(yan)裝(zhuang)(zhuang)置由幾臺(tai)(tai)(tai)單(dan)臺(tai)(tai)(tai)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)組(zu)(zu)(zu)成，單(dan)臺(tai)(tai)(tai)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)容(rong)量(liang)(liang)小、電(dian)(dian)壓(ya)(ya)(ya)低、重(zhong)量(liang)(liang)輕，便于(yu)運輸(shu)和(he)(he)(he)安裝(zhuang)(zhuang)。它既然可(ke)串接(jie)成高(gao)出(chu)幾倍的(de)(de)(de)單(dan)臺(tai)(tai)(tai)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)輸(shu)出(chu)電(dian)(dian)壓(ya)(ya)(ya)組(zu)(zu)(zu)合使(shi)用，又可(ke)分開成幾套(tao)單(dan)臺(tai)(tai)(tai)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)單(dan)獨(du)使(shi)用。整套(tao)裝(zhuang)(zhuang)置投資(zi)小，經(jing)濟實惠(hui)。圖(tu)5中(zhong)，在**級(ji)(ji)(ji)(ji)(ji)和(he)(he)(he)**級(ji)(ji)(ji)(ji)(ji)的(de)(de)(de)每(mei)個(ge)單(dan)元(yuan)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)中(zhong)都(dou)有一個(ge)勵磁(ci)繞組(zu)(zu)(zu)A1、C1和(he)(he)(he)A2、C2。在三臺(tai)(tai)(tai)串級(ji)(ji)(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)基本(ben)原(yuan)理中(zhong)，低壓(ya)(ya)(ya)電(dian)(dian)源加在試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)Ⅰ的(de)(de)(de)初級(ji)(ji)(ji)(ji)(ji)繞組(zu)(zu)(zu)a1x1上，單(dan)臺(tai)(tai)(tai)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)Ⅰ、Ⅱ、Ⅲ的(de)(de)(de)輸(shu)出(chu)電(dian)(dian)壓(ya)(ya)(ya)都(dou)是V。勵磁(ci)繞組(zu)(zu)(zu)A1、C1給(gei)**級(ji)(ji)(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)Ⅱ的(de)(de)(de)初級(ji)(ji)(ji)(ji)(ji)繞組(zu)(zu)(zu)供電(dian)(dian)；**級(ji)(ji)(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)Ⅱ的(de)(de)(de)勵磁(ci)繞組(zu)(zu)(zu)A2、C2給(gei)第(di)三級(ji)(ji)(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)Ⅲ的(de)(de)(de)初級(ji)(ji)(ji)(ji)(ji)繞組(zu)(zu)(zu)供電(dian)(dian)。**級(ji)(ji)(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)Ⅱ和(he)(he)(he)第(di)三級(ji)(ji)(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)Ⅲ的(de)(de)(de)箱體分別(bie)處在對地為(wei)1V和(he)(he)(he)2V的(de)(de)(de)高(gao)電(dian)(dian)位(wei)上，所以箱體對地是絕(jue)緣的(de)(de)(de)，試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)Ⅰ的(de)(de)(de)箱體是接(jie)地的(de)(de)(de)。這樣(yang)**級(ji)(ji)(ji)(ji)(ji)、**級(ji)(ji)(ji)(ji)(ji)、第(di)三級(ji)(ji)(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)對地的(de)(de)(de)額定輸(shu)出(chu)電(dian)(dian)壓(ya)(ya)(ya)分別(bie)為(wei)1V、2V、3V；其額定容(rong)量(liang)(liang)分別(bie)為(wei)3P、2P、1P。

YDQ系(xi)列高壓(ya)試(shi)驗變壓(ya)器做(zuo)被試(shi)品的工頻耐壓(ya)試(shi)驗使用接線原理(li)圖見圖5。

圖(tu)中：R1—限(xian)流電(dian)阻(zu) FRC—阻(zu)容分壓器 RF—球間(jian)隙保(bao)護電(dian)阻(zu) G—球間(jian)隙 CX—被試品

注：高壓尾(wei)必(bi)須可(ke)靠接地

工頻耐(nai)壓試驗(yan)中限流(liu)電(dian)(dian)(dian)(dian)阻R1應根據(ju)試驗(yan)變壓器的額(e)定(ding)容量來(lai)選擇。如(ru)高(gao)壓側(ce)額(e)定(ding)輸出(chu)電(dian)(dian)(dian)(dian)流(liu)在100～300mA時，可取0.5～1Ω/V(試驗(yan)電(dian)(dian)(dian)(dian)壓)；高(gao)壓側(ce)額(e)定(ding)輸出(chu)電(dian)(dian)(dian)(dian)流(liu)為1A以(yi)上時，可取1Ω/V(試驗(yan)電(dian)(dian)(dian)(dian)壓)。常用(yong)水(shui)電(dian)(dian)(dian)(dian)阻作為限流(liu)電(dian)(dian)(dian)(dian)阻，管子(zi)長度可按150kV/m考慮，管子(zi)粗細應具有足夠的熱容量(水(shui)阻液配(pei)制(zhi)(zhi)方法：用(yong)蒸餾(liu)水(shui)加(jia)入(ru)適量硫酸銅配(pei)制(zhi)(zhi)成各種不同的阻值(zhi))。

球(qiu)間隙及(ji)保護電(dian)(dian)(dian)阻：當電(dian)(dian)(dian)壓超過球(qiu)間隙整定值時(一般取(qu)試(shi)驗電(dian)(dian)(dian)壓的110%~120%)，球(qiu)間隙放電(dian)(dian)(dian)，對被(bei)試(shi)品起到保護作用。球(qiu)間隙保護電(dian)(dian)(dian)阻可(ke)按1Ω/V(試(shi)驗電(dian)(dian)(dian)壓)選取(qu)。

在(zai)工(gong)頻(pin)耐(nai)壓(ya)(ya)(ya)(ya)(ya)(ya)試驗中，低(di)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)側測(ce)量(liang)(liang)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(儀表(biao)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya))不是非常準(zhun)(zhun)確(que)(que)的(de)(de)，其原因是由于(yu)試驗變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器存(cun)在(zai)著(zhu)漏(lou)抗，在(zai)這個漏(lou)抗上(shang)(shang)必然(ran)存(cun)在(zai)著(zhu)壓(ya)(ya)(ya)(ya)(ya)(ya)降或(huo)容升(sheng)，使(shi)試品上(shang)(shang)的(de)(de)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)低(di)于(yu)或(huo)高(gao)于(yu)低(di)壓(ya)(ya)(ya)(ya)(ya)(ya)側測(ce)量(liang)(liang)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)上(shang)(shang)反映出(chu)來的(de)(de)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)。工(gong)頻(pin)耐(nai)壓(ya)(ya)(ya)(ya)(ya)(ya)試驗時，被試品上(shang)(shang)的(de)(de)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)高(gao)于(yu)試驗變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器的(de)(de)輸(shu)出(chu)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)，也就是所(suo)謂(wei)容升(sheng)現象。感應耐(nai)壓(ya)(ya)(ya)(ya)(ya)(ya)試驗時，試驗變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器的(de)(de)漏(lou)抗必然(ran)存(cun)在(zai)著(zhu)壓(ya)(ya)(ya)(ya)(ya)(ya)降。為了(le)準(zhun)(zhun)確(que)(que)測(ce)量(liang)(liang)被試品上(shang)(shang)所(suo)施加的(de)(de)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)，因此常在(zai)高(gao)壓(ya)(ya)(ya)(ya)(ya)(ya)側接(jie)入(ru)FRC阻容分壓(ya)(ya)(ya)(ya)(ya)(ya)器來測(ce)量(liang)(liang)電(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(見圖5)。

工頻耐壓(ya)試驗操作注意事項

1）試驗人(ren)員應做好分工，明確相互間聯(lian)系方法。并有專門(men)人(ren)監護(hu)現(xian)場**及觀(guan)察(cha)試品狀態。

2）被試品(pin)應(ying)先清(qing)掃干(gan)凈，并**干(gan)燥，以免(mian)損壞被試品(pin)和試驗帶來的誤差(cha)。

3）對于大型(xing)試(shi)驗(yan)，一(yi)般都應先進行空升試(shi)驗(yan)。即不接試(shi)品時(shi)升壓(ya)至試(shi)驗(yan)電壓(ya)，校對各種表計，調整球間隙。

4）升壓(ya)(ya)速度(du)不能(neng)太快，并必須防止突然加壓(ya)(ya)。例(li)如調壓(ya)(ya)器(qi)(qi)不在零位時突然合閘。也不能(neng)突然切斷電源，一般應在調壓(ya)(ya)器(qi)(qi)降至(zhi)零位時拉(la)閘。

5）當電(dian)壓升至試驗電(dian)壓時，開始計時，到(dao)(dao)1min后(hou)，迅(xun)速降壓到(dao)(dao)1/3試驗電(dian)壓以下時，才能(neng)拉開電(dian)源。

6）在升壓(ya)(ya)或耐壓(ya)(ya)試(shi)驗過程(cheng)中，如發(fa)現下列不(bu)正(zheng)常情況時，應(ying)立(li)即降(jiang)壓(ya)(ya)，切斷電源。停(ting)止試(shi)驗并查明(ming)原因：①電壓(ya)(ya)表指針擺動(dong)很(hen)大(da)；②發(fa)現絕緣燒焦或冒煙；③被試(shi)品(pin)內(nei)有(you)不(bu)正(zheng)常的聲音。

7）耐壓試驗前后應測量絕(jue)緣電(dian)阻，檢(jian)查絕(jue)緣情況。

試(shi)(shi)驗(yan)變壓器(qi)在(zai)做被試(shi)(shi)品(pin)的直流耐壓或泄露試(shi)(shi)驗(yan)時接線原理圖如(ru)圖6。

注：此試驗(yan)應先(xian)抽出(chu)短路桿“D”，圖6中所示。

圖中：VD—高(gao)壓硅(gui)堆(dui) ; R1—限流電阻(zu) C1—高(gao)壓濾波電容(rong) FRC—阻(zu)容(rong)分(fen)壓器 CX—被試品 μA—帶保護微安表

泄(xie)露試(shi)驗(yan)中限(xian)流(liu)(liu)電(dian)阻R1選(xuan)擇(ze)在額定輸(shu)出(chu)電(dian)壓(ya)時(shi)，輸(shu)出(chu)端短(duan)路電(dian)流(liu)(liu)不超過高壓(ya)硅堆的*大整流(liu)(liu)。如電(dian)壓(ya)硅堆的*大整流(liu)(liu)電(dian)流(liu)(liu)為100mA時(shi)用于60kV的試(shi)驗(yan)裝(zhuang)置中，限(xian)流(liu)(liu)電(dian)阻按(an)R1=60/0.1=600kΩ選(xuan)擇(ze)。限(xian)流(liu)(liu)電(dian)阻還應具有足夠(gou)的容(rong)量(liang)和沿(yan)面放電(dian)距離。

高壓濾波電(dian)容(rong)C1一般選擇(ze)在(zai)0.01~0.1μF，當被試品的電(dian)容(rong)量很大時(shi)，C1可省略(lve)不用。

泄(xie)露試(shi)驗(yan)的操作(zuo)及注意(yi)事項

1）試(shi)(shi)驗前應先檢查被試(shi)(shi)品(pin)是(shi)否(fou)停電(dian)，接地(di)放電(dian)，一切(qie)對(dui)外連(lian)線是(shi)否(fou)擦(ca)干凈。要(yao)嚴防將試(shi)(shi)驗電(dian)壓(ya)加到有人工作的部位上去。

2）接(jie)好試(shi)驗(yan)(yan)裝置的(de)接(jie)線后(hou)，應(ying)復查(cha)無誤后(hou)才可(ke)加壓。應(ying)特別(bie)注意檢查(cha)高(gao)壓設備及引線與地、與操作人員的(de)**距離(li)，被(bei)試(shi)品的(de)外(wai)殼(ke)是否可(ke)靠接(jie)地，要(yao)按**規程中所規定的(de)內容(rong)進行試(shi)驗(yan)(yan)。

3）對(dui)于大電(dian)容量設備應緩慢升壓(ya)(ya)，防(fang)止被試品的(de)充電(dian)電(dian)流燒壞微安(an)表。必要時應分級(ji)加壓(ya)(ya)，分別讀取各級(ji)電(dian)壓(ya)(ya)下(xia)微安(an)表的(de)穩定讀數。

4）試(shi)驗(yan)過程(cheng)中，應(ying)密切監(jian)視被試(shi)品、試(shi)驗(yan)裝(zhuang)置(zhi)、微安表，一旦發生擊穿(chuan)、閃爍等異常現象應(ying)立即(ji)降壓(ya)，切斷(duan)電源，并查明原因，詳細(xi)記錄(lu)。

5）試驗完畢，降壓，切斷電源后應將被試品及(ji)試驗裝置本身充分(fen)放電。

四、WBYD-350KV交直流試驗變壓器注意事項

1、按照您所(suo)進行(xing)的試(shi)驗接(jie)好工作(zuo)(zuo)線路。試(shi)驗變壓器的外殼(ke)以及(ji)操作(zuo)(zuo)系(xi)統的外殼(ke)必(bi)須可靠接(jie)地(di)。試(shi)驗變壓器高壓繞組的X端(duan)(高壓尾)以及(ji)測量繞組的F端(duan)必(bi)須可靠接(jie)地(di)。

2、做串級(ji)(ji)(ji)試(shi)(shi)驗時(shi)，**級(ji)(ji)(ji)、第三級(ji)(ji)(ji)試(shi)(shi)驗變壓器(qi)的(de)低壓繞(rao)組的(de)X端，測量繞(rao)組的(de)F端以及(ji)高(gao)壓繞(rao)組的(de)X端(高(gao)壓尾)均(jun)接本級(ji)(ji)(ji)試(shi)(shi)驗變壓器(qi)的(de)外殼(ke)。**級(ji)(ji)(ji)、第三級(ji)(ji)(ji)試(shi)(shi)驗變壓器(qi)的(de)外殼(ke)必須(xu)通(tong)過(guo)絕(jue)緣支(zhi)架接地。

3、接(jie)通電源前，操作系(xi)統(tong)的(de)調壓器(qi)必須調到零(ling)位后方可(ke)接(jie)通電源，合閘，開始(shi)升壓。

4、從(cong)零(ling)(ling)開始(shi)(shi)均勻旋轉調壓(ya)(ya)(ya)器(qi)手(shou)輪升(sheng)壓(ya)(ya)(ya)。升(sheng)壓(ya)(ya)(ya)方法(fa)(fa)有：快速(su)(su)升(sheng)壓(ya)(ya)(ya)法(fa)(fa)，即20s逐級升(sheng)壓(ya)(ya)(ya)法(fa)(fa)；慢速(su)(su)升(sheng)壓(ya)(ya)(ya)法(fa)(fa)，即60s逐級升(sheng)壓(ya)(ya)(ya)法(fa)(fa)；極慢速(su)(su)升(sheng)壓(ya)(ya)(ya)法(fa)(fa)供選用(yong)。電(dian)壓(ya)(ya)(ya)從(cong)零(ling)(ling)開始(shi)(shi)按一定的(de)升(sheng)壓(ya)(ya)(ya)方式和(he)速(su)(su)度上升(sheng)到(dao)您所(suo)需的(de)額定試(shi)驗電(dian)壓(ya)(ya)(ya)的(de)75%后，在以(yi)每(mei)秒(miao)2%額定試(shi)驗電(dian)壓(ya)(ya)(ya)的(de)速(su)(su)度升(sheng)到(dao)您所(suo)需的(de)額定電(dian)壓(ya)(ya)(ya)，并密切注意測(ce)(ce)量儀表的(de)指示(shi)以(yi)及(ji)被(bei)試(shi)品的(de)情(qing)況。升(sheng)壓(ya)(ya)(ya)過程中(zhong)或試(shi)驗過程中(zhong)如(ru)發現測(ce)(ce)量儀表的(de)指示(shi)及(ji)被(bei)試(shi)品情(qing)況異常，應(ying)立即降壓(ya)(ya)(ya)，切斷電(dian)源，查明情(qing)況。

5、試驗完(wan)畢后，應在數(shu)秒內勻速的將調壓器返(fan)回至零位，然(ran)后切斷電源。

6、本(ben)產品(pin)不得超(chao)過(guo)額定參數(shu)使(shi)用。除試驗必(bi)須外，決(jue)不允(yun)許全電(dian)壓通電(dian)或(huo)斷電(dian)。

7、再升壓或耐壓試驗過程中(zhong)，如發現以下不正(zheng)常情(qing)況時，應立即(ji)降壓，切斷電源(yuan)，停止(zhi)試驗并查明原因。

⑴電(dian)壓表(biao)指針擺動(或(huo)數字跳動)很(hen)大

⑵電流(liu)表直(zhi)線上升

被試品內有(you)不正常的聲(sheng)音

8、圖1中(zhong)第9項(xiang)系壓力(li)閥(fa)及壓力(li)表(biao)，為(wei)長(chang)期關閉(bi)狀(zhuang)態(tai)。每(mei)6個月開閥(fa)一次，以檢(jian)查SF6壓力(li)，應不小于0.2MPa(檢(jian)查壓力(li)后(hou)立即關閉(bi)閥(fa)門(men))，低(di)于0.2MPa時應加(jia)(jia)SF6氣體，以增(zeng)加(jia)(jia)氣絕緣(yuan)。

9、耐(nai)壓實驗前(qian)后應(ying)測量(liang)被試設備(bei)的絕緣電阻(zu)，檢查(cha)絕緣情況。

10、當試驗變壓器長期不(bu)使用時，應放置(zhi)于通風、干燥、無陽光直射的地方。

11、該產品不允許在高于45℃的溫度下長期存放(fang)、使用、放(fang)氣。

12、運輸(shu)搬(ban)運途(tu)中不得重力沖擊。

13、產品緊固件及壓力閥、壓力表不得擅自松動。

14、使用本產(chan)品做高(gao)壓(ya)試(shi)驗時(shi)，出熟悉(xi)本說(shuo)明書外，還必須(xu)嚴格執行國家(jia)有關標準和操作規程(cheng)。可參照GB311-83《高(gao)壓(ya)輸(shu)變設備(bei)的絕緣配合，高(gao)壓(ya)試(shi)驗技術》；《電氣設備(bei)預防性試(shi)驗規程(cheng)》等。

五、WBYD-350KV交直流試驗變壓器容量選擇

標(biao)稱試驗變壓器容量Pn的確定公式(shi)：Pn=kVn 2ωCt×10-9

式中：

Pn——標稱試驗變壓器容量(kVA)

Vn——試驗變壓(ya)器的額(e)定(ding)輸(shu)出(chu)高壓(ya)的有效值(kV)

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

Ct——被試品的電容量(pF)

ω——角頻率，ω=2πf， f——試(shi)驗(yan)電源(yuan)的頻率

被試(shi)設(she)備(bei)的(de)(de)電容量(liang)Ct可由交流電橋(qiao)測出。Ct的(de)(de)變化很(hen)大，

可由(you)設備的類型而定(ding)。

典型數(shu)據如下(xia)：

簡單的棒式或懸式絕緣子(zi)   幾(ji)十微(wei)法