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高壓試驗變壓器

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產品名稱: 高(gao)壓(ya)試驗變壓(ya)器

產品型號: WBYD-10KVA/100KV

產品展商: 其(qi)它品牌(pai)

產品文檔: 無相(xiang)關(guan)文(wen)檔

產品簡介

WBYD-10KVA/100KV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。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(yi)、WBYD-10KVA/100KV高壓試驗變壓器概述(shu)

YDQ系列高壓(ya)試驗(yan)變(bian)壓(ya)器(qi)(qi)是(shi)根據(ju)《試驗(yan)變(bian)壓(ya)器(qi)(qi)》標(biao)準，在(zai)(zai)油(you)浸(jin)式試驗(yan)變(bian)壓(ya)器(qi)(qi)的(de)(de)基(ji)礎上(shang)而設計生(sheng)產的(de)(de)。SF6氣(qi)(qi)體具有(you)良好的(de)(de)電(dian)(dian)氣(qi)(qi)絕緣(yuan)(yuan)性能及優異的(de)(de)滅弧性能，其耐壓(ya)強度為同(tong)一(yi)壓(ya)力(li)下(xia)氮氣(qi)(qi)的(de)(de)2.5倍(bei)，擊(ji)(ji)穿電(dian)(dian)壓(ya)的(de)(de)空氣(qi)(qi)的(de)(de)2.5倍(bei)。在(zai)(zai)0.25MPa下(xia)與油(you)的(de)(de)擊(ji)(ji)穿電(dian)(dian)壓(ya)相等，在(zai)(zai)0.45MPa壓(ya)力(li)下(xia)是(shi)油(you)的(de)(de)擊(ji)(ji)穿電(dian)(dian)壓(ya)的(de)(de)2倍(bei)，是(shi)一(yi)種優于(yu)油(you)的(de)(de)新一(yi)代超高壓(ya)絕緣(yuan)(yuan)介質(zhi)材料。該(gai)產品(pin)技術要求完全符合《ZBK-41006-89》標(biao)準，它是(shi)油(you)浸(jin)式輕型(xing)試驗(yan)變(bian)壓(ya)器(qi)(qi)的(de)(de)換代產品(pin)。該(gai)產品(pin)具有(you)體積(ji)小、重量輕、不受氣(qi)(qi)候變(bian)化影響、電(dian)(dian)暈小、現場搬運無需靜止(zhi)可使用，使用壽(shou)命長、免維修等特點。適用于(yu)電(dian)(dian)力(li)系統(tong)、工(gong)礦企業、科(ke)研部門等對各(ge)種高壓(ya)電(dian)(dian)氣(qi)(qi)設備、電(dian)(dian)氣(qi)(qi)元件(jian)、絕緣(yuan)(yuan)材料進行工(gong)頻或直流高壓(ya)下(xia)的(de)(de)絕緣(yuan)(yuan)強度試驗(yan)。

二、WBYD-10KVA/100KV高壓試驗變壓器產品結構

YDQ系(xi)列(lie)高壓(ya)(ya)試驗(yan)變壓(ya)(ya)器(qi)采用單(dan)框芯(xin)式鐵芯(xin)結(jie)構，初(chu)級(ji)繞(rao)組(zu)繞(rao)在(zai)鐵芯(xin)上，高壓(ya)(ya)繞(rao)組(zu)在(zai)外(wai)(wai)，這種同(tong)軸(zhou)布置(zhi)減(jian)少(shao)了(le)漏磁通，因而(er)增(zeng)大(da)了(le)繞(rao)組(zu)間的(de)耦合。產品(pin)的(de)外(wai)(wai)殼為圓柱(zhu)灌式容(rong)器(qi)結(jie)構，能(neng)耐受(shou)0.8MPa以上壓(ya)(ya)力。其結(jie)構見圖1：

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

三、WBYD-10KVA/100KV高壓試驗變壓器工作原理

YDQ系列高壓(ya)(ya)試(shi)驗(yan)變(bian)壓(ya)(ya)器(qi)為單(dan)相變(bian)壓(ya)(ya)器(qi)，聯(lian)結(jie)組標(biao)號Ⅰ.Ⅰ. 用工(gong)頻220V(10kVA以上為380V)電(dian)源接入 (為本(ben)公司生產(chan)的(de)試(shi)驗(yan)變(bian)壓(ya)(ya)器(qi)配(pei)套(tao)專用設備，詳細資料請見(jian)其具體使用說明書)系列操作箱(臺)，經(jing)操作箱內自偶調壓(ya)(ya)器(qi)(50kVA以上調壓(ya)(ya)器(qi)外(wai)附(fu))調節至0～200V(或0～400V)電(dian)壓(ya)(ya)輸出(chu)至YDQ試(shi)驗(yan)變(bian)壓(ya)(ya)器(qi)的(de)初級繞組，根(gen)據(ju)電(dian)磁感應原理，在試(shi)驗(yan)變(bian)壓(ya)(ya)器(qi)高壓(ya)(ya)繞組可獲得試(shi)驗(yan)所需的(de)高電(dian)壓(ya)(ya)。

單臺YDQ系列高壓試驗變壓器的工作原理圖見圖2。

單(dan)臺YDQ系列交直(zhi)流(liu)高壓(ya)試驗變壓(ya)器(qi)的(de)工(gong)作原理(li)圖見圖3，圖中(zhong)高壓(ya)套(tao)管中(zhong)裝有高壓(ya)硅(gui)堆，串接(jie)在高壓(ya)回路(lu)中(zhong)作半波(bo)整流(liu)，以獲(huo)得直(zhi)流(liu)高電壓(ya)。當用一短路(lu)桿將(jiang)高壓(ya)硅(gui)堆短接(jie)時(shi)(shi)，可獲(huo)得工(gong)頻高電壓(ya)，作為交流(liu)輸(shu)出(chu)狀態；取(qu)消短路(lu)桿時(shi)(shi)，作為直(zhi)流(liu)輸(shu)出(chu)狀態。

試驗變壓器高壓套管中的高壓硅堆未畫出，其(qi)原理與上圖相同(tong)。

三(san)臺(tai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)串級(ji)(ji)(ji)獲(huo)得更高(gao)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)接(jie)(jie)線原理見(jian)圖(tu)4。串級(ji)(ji)(ji)高(gao)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(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，因為(wei)整個試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)裝置由幾臺(tai)單(dan)(dan)臺(tai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)組(zu)成(cheng)，單(dan)(dan)臺(tai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)容量小、電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)低(di)、重量輕(qing)，便于(yu)運(yun)輸(shu)和(he)(he)安裝。它既(ji)然可(ke)串接(jie)(jie)成(cheng)高(gao)出(chu)幾倍的(de)(de)(de)單(dan)(dan)臺(tai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)輸(shu)出(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)組(zu)合使(shi)用，又可(ke)分(fen)開成(cheng)幾套單(dan)(dan)臺(tai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)單(dan)(dan)獨(du)使(shi)用。整套裝置投資小，經濟(ji)實(shi)惠(hui)。圖(tu)5中，在**級(ji)(ji)(ji)和(he)(he)**級(ji)(ji)(ji)的(de)(de)(de)每個單(dan)(dan)元試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)中都有一個勵磁(ci)繞組(zu)A1、C1和(he)(he)A2、C2。在三(san)臺(tai)串級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)基(ji)本原理中，低(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)電(dian)(dian)(dian)源加(jia)在試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(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)(ji)繞組(zu)a1x1上(shang)，單(dan)(dan)臺(tai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(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(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)都是(shi)V。勵磁(ci)繞組(zu)A1、C1給(gei)**級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(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)(ji)繞組(zu)供電(dian)(dian)(dian)；**級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅱ的(de)(de)(de)勵磁(ci)繞組(zu)A2、C2給(gei)第三(san)級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(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)(ji)繞組(zu)供電(dian)(dian)(dian)。**級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅱ和(he)(he)第三(san)級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅲ的(de)(de)(de)箱(xiang)(xiang)體(ti)分(fen)別(bie)處在對(dui)地為(wei)1V和(he)(he)2V的(de)(de)(de)高(gao)電(dian)(dian)(dian)位上(shang)，所以(yi)箱(xiang)(xiang)體(ti)對(dui)地是(shi)絕緣的(de)(de)(de)，試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)Ⅰ的(de)(de)(de)箱(xiang)(xiang)體(ti)是(shi)接(jie)(jie)地的(de)(de)(de)。這樣**級(ji)(ji)(ji)、**級(ji)(ji)(ji)、第三(san)級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)對(dui)地的(de)(de)(de)額定輸(shu)出(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)分(fen)別(bie)為(wei)1V、2V、3V；其額定容量分(fen)別(bie)為(wei)3P、2P、1P。

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

圖(tu)中：R1—限流電(dian)阻(zu) FRC—阻(zu)容分壓器(qi)   RF—球間隙保(bao)護(hu)電(dian)阻(zu) G—球間隙   CX—被試(shi)品

注：高壓尾必須可靠接(jie)地

工頻耐壓(ya)試(shi)驗(yan)中限流電(dian)阻(zu)(zu)R1應根據(ju)試(shi)驗(yan)變壓(ya)器的額(e)定(ding)(ding)容量(liang)(liang)來選擇。如高壓(ya)側額(e)定(ding)(ding)輸出(chu)電(dian)流在100～300mA時(shi)，可取0.5～1Ω/V(試(shi)驗(yan)電(dian)壓(ya))；高壓(ya)側額(e)定(ding)(ding)輸出(chu)電(dian)流為1A以上時(shi)，可取1Ω/V(試(shi)驗(yan)電(dian)壓(ya))。常用(yong)水電(dian)阻(zu)(zu)作為限流電(dian)阻(zu)(zu)，管子長度可按150kV/m考慮(lv)，管子粗細應具有足夠的熱容量(liang)(liang)(水阻(zu)(zu)液配制方法：用(yong)蒸餾水加入適量(liang)(liang)硫酸銅(tong)配制成各種不同的阻(zu)(zu)值)。

球(qiu)間(jian)隙及保護電(dian)阻(zu)：當(dang)電(dian)壓超過球(qiu)間(jian)隙整定值時(一般取試驗(yan)電(dian)壓的(de)110%~120%)，球(qiu)間(jian)隙放電(dian)，對(dui)被試品起(qi)到保護作用。球(qiu)間(jian)隙保護電(dian)阻(zu)可按1Ω/V(試驗(yan)電(dian)壓)選取。

在(zai)(zai)工頻耐(nai)(nai)壓(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)(shi)驗中(zhong)，低(di)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)側(ce)測(ce)量(liang)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(儀(yi)表電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya))不是非(fei)常(chang)準(zhun)確(que)的(de)，其原(yuan)因是由于試(shi)(shi)(shi)驗變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器存在(zai)(zai)著(zhu)漏(lou)抗，在(zai)(zai)這個漏(lou)抗上必然(ran)存在(zai)(zai)著(zhu)壓(ya)(ya)(ya)(ya)(ya)(ya)降或容升，使(shi)試(shi)(shi)(shi)品(pin)上的(de)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)低(di)于或高(gao)于低(di)壓(ya)(ya)(ya)(ya)(ya)(ya)側(ce)測(ce)量(liang)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表上反(fan)映(ying)出來(lai)的(de)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)。工頻耐(nai)(nai)壓(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)(shi)驗時(shi)，被試(shi)(shi)(shi)品(pin)上的(de)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)高(gao)于試(shi)(shi)(shi)驗變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器的(de)輸出電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)，也就是所(suo)謂容升現象。感(gan)應耐(nai)(nai)壓(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)(shi)驗時(shi)，試(shi)(shi)(shi)驗變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器的(de)漏(lou)抗必然(ran)存在(zai)(zai)著(zhu)壓(ya)(ya)(ya)(ya)(ya)(ya)降。為了準(zhun)確(que)測(ce)量(liang)被試(shi)(shi)(shi)品(pin)上所(suo)施(shi)加的(de)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)，因此常(chang)在(zai)(zai)高(gao)壓(ya)(ya)(ya)(ya)(ya)(ya)側(ce)接入FRC阻容分壓(ya)(ya)(ya)(ya)(ya)(ya)器來(lai)測(ce)量(liang)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(見圖5)。

工(gong)頻耐壓試驗(yan)操作注意(yi)事(shi)項

1）試驗人員應做(zuo)好分工(gong)，明(ming)確相互間聯系方法。并有專(zhuan)門人監護現場**及觀(guan)察(cha)試品狀態。

2）被試品(pin)應(ying)先清掃干(gan)凈，并**干(gan)燥，以免損壞被試品(pin)和試驗(yan)帶(dai)來(lai)的誤差(cha)。

3）對(dui)于大(da)型試驗，一般都應先進行空升試驗。即(ji)不接試品時升壓(ya)(ya)至(zhi)試驗電壓(ya)(ya)，校對(dui)各種表計，調整球間隙。

4）升壓速度不(bu)能(neng)太快，并必須防止(zhi)突(tu)然加壓。例如(ru)調(diao)(diao)壓器不(bu)在零位時突(tu)然合閘(zha)。也不(bu)能(neng)突(tu)然切斷(duan)電源，一般(ban)應在調(diao)(diao)壓器降(jiang)至零位時拉閘(zha)。

5）當電(dian)壓(ya)升(sheng)至試(shi)驗(yan)電(dian)壓(ya)時(shi)，開始計時(shi)，到(dao)1min后(hou)，迅速降壓(ya)到(dao)1/3試(shi)驗(yan)電(dian)壓(ya)以下時(shi)，才(cai)能拉開電(dian)源。

6）在升(sheng)壓或耐壓試驗過程中(zhong)，如發現(xian)下(xia)列不(bu)正常情況(kuang)時，應立即降壓，切斷(duan)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(jue)緣(yuan)燒焦或冒煙(yan)；③被(bei)試品(pin)內有不(bu)正常的聲音。

7）耐(nai)壓試(shi)驗前后應測量絕緣(yuan)電(dian)阻，檢查(cha)絕緣(yuan)情況。

試(shi)(shi)驗變壓器在做被試(shi)(shi)品(pin)的(de)直流耐壓或(huo)泄露試(shi)(shi)驗時接線原理圖如圖6。

注：此(ci)試驗應先抽出短路桿“D”，圖6中所示。

圖(tu)中(zhong)：VD—高(gao)壓硅堆(dui) R1—限流電(dian)阻(zu)  C1—高(gao)壓濾波電(dian)容 FRC—阻(zu)容分壓器 CX—被試品 μA—帶保護微安(an)表

泄露(lu)試驗中(zhong)限(xian)流(liu)(liu)電(dian)阻(zu)(zu)R1選擇在(zai)額定(ding)輸出(chu)電(dian)壓時(shi)，輸出(chu)端短路電(dian)流(liu)(liu)不(bu)超過(guo)高壓硅堆的(de)*大(da)整流(liu)(liu)。如電(dian)壓硅堆的(de)*大(da)整流(liu)(liu)電(dian)流(liu)(liu)為100mA時(shi)用于(yu)60kV的(de)試驗裝置(zhi)中(zhong)，限(xian)流(liu)(liu)電(dian)阻(zu)(zu)按R1=60/0.1=600kΩ選擇。限(xian)流(liu)(liu)電(dian)阻(zu)(zu)還應具有(you)足夠的(de)容量(liang)和(he)沿(yan)面放電(dian)距(ju)離。

高(gao)壓濾波電容C1一(yi)般(ban)選擇在0.01~0.1μF，當被試品的電容量很大時，C1可(ke)省略不用。

泄(xie)露試驗的操作及注意事項(xiang)

1）試(shi)驗前應(ying)先(xian)檢查(cha)被試(shi)品是(shi)否(fou)停電，接地放電，一(yi)切(qie)對外連線是(shi)否(fou)擦干凈。要嚴防將試(shi)驗電壓加到有(you)人工作的部位上去。

2）接(jie)好試(shi)(shi)驗裝置的接(jie)線(xian)后，應(ying)復查(cha)無誤(wu)后才可加壓。應(ying)特別注意檢(jian)查(cha)高壓設(she)備及(ji)引線(xian)與地(di)(di)、與操作人員的**距離，被試(shi)(shi)品的外殼是否可靠接(jie)地(di)(di)，要按**規程中所規定的內容進行試(shi)(shi)驗。

3）對于大電容量設備應緩慢升壓，防止(zhi)被試(shi)品的充電電流燒壞微(wei)安表。必要時(shi)應分(fen)級(ji)加壓，分(fen)別讀取各級(ji)電壓下微(wei)安表的穩(wen)定讀數。

4）試驗(yan)過程中(zhong)，應(ying)密切監視(shi)被試品、試驗(yan)裝(zhuang)置、微(wei)安表，一旦(dan)發(fa)生擊穿(chuan)、閃爍等異(yi)常(chang)現象應(ying)立即(ji)降壓，切斷(duan)電源，并查明(ming)原(yuan)因，詳細記錄。

5）試(shi)驗(yan)完畢，降(jiang)壓，切斷電源后應(ying)將被試(shi)品及試(shi)驗(yan)裝置本(ben)身充分(fen)放電。

四、WBYD-10KVA/100KV高壓試驗變壓器注意事項

1、按(an)照您所進行的試驗接好(hao)工作線路。試驗變壓器的外殼以(yi)及(ji)操作系統的外殼必(bi)(bi)須(xu)可(ke)靠接地(di)。試驗變壓器高壓繞組的X端(高壓尾)以(yi)及(ji)測(ce)量繞組的F端必(bi)(bi)須(xu)可(ke)靠接地(di)。

2、做串級(ji)(ji)試驗時，**級(ji)(ji)、第三級(ji)(ji)試驗變(bian)壓(ya)(ya)器(qi)的(de)(de)低(di)壓(ya)(ya)繞組(zu)(zu)的(de)(de)X端(duan)，測量繞組(zu)(zu)的(de)(de)F端(duan)以及高(gao)壓(ya)(ya)繞組(zu)(zu)的(de)(de)X端(duan)(高(gao)壓(ya)(ya)尾)均接(jie)本級(ji)(ji)試驗變(bian)壓(ya)(ya)器(qi)的(de)(de)外殼。**級(ji)(ji)、第三級(ji)(ji)試驗變(bian)壓(ya)(ya)器(qi)的(de)(de)外殼必須通過絕緣支架接(jie)地(di)。

3、接通電(dian)源(yuan)前，操作系(xi)統(tong)的調壓器必須調到(dao)零位(wei)后方可接通電(dian)源(yuan)，合(he)閘，開始(shi)升壓。

4、從零開始均(jun)勻旋轉調壓(ya)(ya)(ya)(ya)(ya)器(qi)手輪升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)。升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)方(fang)法(fa)(fa)有：快速升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)法(fa)(fa)，即(ji)20s逐(zhu)級升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)法(fa)(fa)；慢速升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)法(fa)(fa)，即(ji)60s逐(zhu)級升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)法(fa)(fa)；極慢速升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)法(fa)(fa)供選用。電(dian)壓(ya)(ya)(ya)(ya)(ya)從零開始按一定(ding)(ding)的(de)(de)升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)方(fang)式和速度上升(sheng)(sheng)(sheng)到您所需的(de)(de)額(e)定(ding)(ding)試(shi)(shi)驗電(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)75%后(hou)，在以(yi)每秒2%額(e)定(ding)(ding)試(shi)(shi)驗電(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)速度升(sheng)(sheng)(sheng)到您所需的(de)(de)額(e)定(ding)(ding)電(dian)壓(ya)(ya)(ya)(ya)(ya)，并密切注意測量(liang)儀(yi)表(biao)的(de)(de)指(zhi)示以(yi)及被試(shi)(shi)品(pin)的(de)(de)情況。升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)(ya)過(guo)程中或試(shi)(shi)驗過(guo)程中如發現(xian)測量(liang)儀(yi)表(biao)的(de)(de)指(zhi)示及被試(shi)(shi)品(pin)情況異常，應立即(ji)降壓(ya)(ya)(ya)(ya)(ya)，切斷電(dian)源，查明情況。

5、試驗完畢后，應在數秒內勻速的將調(diao)壓器返(fan)回(hui)至零位(wei)，然后切(qie)斷電源(yuan)。

6、本產品不得超過額定參數使用。除(chu)試驗必須外，決不允許全電(dian)(dian)壓通電(dian)(dian)或(huo)斷電(dian)(dian)。

7、再升壓(ya)或耐壓(ya)試(shi)驗過程中(zhong)，如發現以下不正常情(qing)況時，應(ying)立即降(jiang)壓(ya)，切斷(duan)電源，停止試(shi)驗并(bing)查明(ming)原因。

⑴電(dian)壓(ya)表指針(zhen)擺(bai)動(或(huo)數字跳(tiao)動)很大

⑵電流(liu)表直(zhi)線上(shang)升

被(bei)試品內有不(bu)正常的聲音

8、圖1中(zhong)第9項系壓力閥(fa)及(ji)壓力表(biao)，為長(chang)期(qi)關閉狀態。每6個月(yue)開(kai)閥(fa)一(yi)次，以檢查SF6壓力，應不小于0.2MPa(檢查壓力后立即關閉閥(fa)門)，低于0.2MPa時(shi)應加SF6氣體，以增加氣絕緣(yuan)。

9、耐壓實驗前(qian)后應測量被試設備(bei)的絕(jue)緣電阻，檢查絕(jue)緣情(qing)況。

10、當試驗變壓(ya)器長期不使用時，應放置于通風、干燥(zao)、無陽光(guang)直射的(de)地方。

11、該產(chan)品(pin)不(bu)允許在高于45℃的溫度下長期存(cun)放、使用、放氣。

12、運輸搬運途(tu)中不得重力沖擊。

13、產(chan)品(pin)緊(jin)固件及壓力閥(fa)、壓力表(biao)不得(de)擅自松動。

14、使用(yong)本(ben)產(chan)品做高(gao)壓試驗時，出熟悉本(ben)說明書外(wai)，還必須嚴(yan)格執行國家有關(guan)標準和操作規程。可(ke)參照GB311-83《高(gao)壓輸變設備的絕(jue)緣配合，高(gao)壓試驗技術》；《電氣設備預防性試驗規程》等(deng)。

五、WBYD-10KVA/100KV高壓試驗變壓器容量選擇

標稱試(shi)驗變(bian)壓器容量Pn的確定公(gong)式：Pn=kVn 2ωCt×10-9

式(shi)中：

Pn——標稱試驗變壓器容(rong)量(kVA)

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

k ——**系(xi)數。k≥1，標稱(cheng)電壓(ya)Vn≥1MV時，k=2；標稱(cheng)電壓(ya)較低(di)時，k值(zhi)可取高(gao)一些。

Ct——被試品的電容量(pF)

ω——角頻(pin)率，ω=2πf， f——試驗電源的頻(pin)率

被試設備(bei)的電(dian)容量(liang)Ct可由交流(liu)電(dian)橋測出。Ct的變化很大，

可由設備的類型而定。

典型數據如下：

簡單的棒式(shi)或懸式(shi)絕緣子   幾十微法