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高壓試驗變壓器

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產品名稱: 高壓(ya)(ya)試驗變(bian)壓(ya)(ya)器

產品型號: WBTQSB-3KVA/50KV

產品展商: 其(qi)它品牌(pai)

產品文檔: 無(wu)相(xiang)關文檔(dang)

產品簡介

WBTQSB-3KVA/50KV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)、WBTQSB-3KVA/50KV高壓試驗變壓器概述

YDQ系列高(gao)壓(ya)(ya)(ya)試(shi)驗(yan)變(bian)壓(ya)(ya)(ya)器是根據《試(shi)驗(yan)變(bian)壓(ya)(ya)(ya)器》標準(zhun)，在(zai)油浸式試(shi)驗(yan)變(bian)壓(ya)(ya)(ya)器的(de)基(ji)礎上而設(she)計(ji)生產(chan)的(de)。SF6氣(qi)(qi)(qi)體具有良好的(de)電(dian)(dian)(dian)氣(qi)(qi)(qi)絕(jue)緣性能(neng)及(ji)優異(yi)的(de)滅(mie)弧性能(neng)，其耐壓(ya)(ya)(ya)強度(du)為同一壓(ya)(ya)(ya)力下氮氣(qi)(qi)(qi)的(de)2.5倍(bei)(bei)，擊(ji)穿電(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)空氣(qi)(qi)(qi)的(de)2.5倍(bei)(bei)。在(zai)0.25MPa下與油的(de)擊(ji)穿電(dian)(dian)(dian)壓(ya)(ya)(ya)相等，在(zai)0.45MPa壓(ya)(ya)(ya)力下是油的(de)擊(ji)穿電(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)2倍(bei)(bei)，是一種優于(yu)油的(de)新一代超高(gao)壓(ya)(ya)(ya)絕(jue)緣介質(zhi)材(cai)料。該產(chan)品技術要求(qiu)完全符合《ZBK-41006-89》標準(zhun)，它是油浸式輕型試(shi)驗(yan)變(bian)壓(ya)(ya)(ya)器的(de)換代產(chan)品。該產(chan)品具有體積小、重量輕、不受(shou)氣(qi)(qi)(qi)候變(bian)化(hua)影響、電(dian)(dian)(dian)暈(yun)小、現場搬運(yun)無需靜止可使(shi)用(yong)，使(shi)用(yong)壽(shou)命長、免維修等特點。適用(yong)于(yu)電(dian)(dian)(dian)力系統、工(gong)礦企業、科研部(bu)門等對各種高(gao)壓(ya)(ya)(ya)電(dian)(dian)(dian)氣(qi)(qi)(qi)設(she)備、電(dian)(dian)(dian)氣(qi)(qi)(qi)元件、絕(jue)緣材(cai)料進行工(gong)頻或(huo)直流高(gao)壓(ya)(ya)(ya)下的(de)絕(jue)緣強度(du)試(shi)驗(yan)。

二、WBTQSB-3KVA/50KV高壓試驗變壓器產品結構

YDQ系列高壓(ya)試驗變(bian)壓(ya)器采用(yong)單框(kuang)芯(xin)(xin)式(shi)鐵芯(xin)(xin)結(jie)構(gou)，初級繞(rao)(rao)組(zu)繞(rao)(rao)在(zai)鐵芯(xin)(xin)上，高壓(ya)繞(rao)(rao)組(zu)在(zai)外(wai)，這種同軸布置減少了(le)漏磁(ci)通，因而(er)增(zeng)大了(le)繞(rao)(rao)組(zu)間(jian)的耦合。產品的外(wai)殼(ke)為(wei)圓柱灌式(shi)容器結(jie)構(gou)，能耐受0.8MPa以上壓(ya)力。其結(jie)構(gou)見圖(tu)1：

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

三、WBTQSB-3KVA/50KV高壓試驗變壓器工作原理

YDQ系列高(gao)(gao)壓(ya)(ya)試驗(yan)變壓(ya)(ya)器為(wei)單相變壓(ya)(ya)器，聯結組標(biao)號Ⅰ.Ⅰ. 用(yong)工頻(pin)220V(10kVA以上為(wei)380V)電(dian)源接入 (為(wei)本公司生產的(de)試驗(yan)變壓(ya)(ya)器配(pei)套專用(yong)設備，詳細資料請(qing)見其(qi)具體使用(yong)說明書)系列操(cao)作箱(臺)，經(jing)操(cao)作箱內自偶調(diao)壓(ya)(ya)器(50kVA以上調(diao)壓(ya)(ya)器外附)調(diao)節(jie)至(zhi)0～200V(或0～400V)電(dian)壓(ya)(ya)輸出至(zhi)YDQ試驗(yan)變壓(ya)(ya)器的(de)初級(ji)繞組，根(gen)據電(dian)磁感應原(yuan)理，在(zai)試驗(yan)變壓(ya)(ya)器高(gao)(gao)壓(ya)(ya)繞組可獲得試驗(yan)所需(xu)的(de)高(gao)(gao)電(dian)壓(ya)(ya)。

單臺YDQ系列高壓試驗變壓器的(de)工作原理圖(tu)見圖(tu)2。

單臺(tai)YDQ系列交(jiao)直(zhi)流(liu)(liu)高(gao)(gao)(gao)(gao)壓試驗變(bian)壓器的(de)工作(zuo)原理圖(tu)見圖(tu)3，圖(tu)中高(gao)(gao)(gao)(gao)壓套管中裝有高(gao)(gao)(gao)(gao)壓硅堆，串接(jie)在高(gao)(gao)(gao)(gao)壓回(hui)路中作(zuo)半波整流(liu)(liu)，以獲得(de)直(zhi)流(liu)(liu)高(gao)(gao)(gao)(gao)電壓。當用一短路桿將高(gao)(gao)(gao)(gao)壓硅堆短接(jie)時(shi)，可獲得(de)工頻高(gao)(gao)(gao)(gao)電壓，作(zuo)為交(jiao)流(liu)(liu)輸出狀態；取(qu)消短路桿時(shi)，作(zuo)為直(zhi)流(liu)(liu)輸出狀態。

試(shi)驗變壓(ya)器高(gao)壓(ya)套管中的高(gao)壓(ya)硅堆(dui)未畫出(chu)，其原理與上圖相(xiang)同。

三(san)(san)臺(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)串(chuan)級(ji)(ji)(ji)獲(huo)得更高(gao)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)接(jie)線原理見(jian)圖4。串(chuan)級(ji)(ji)(ji)高(gao)壓(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)有很大的(de)(de)(de)(de)(de)(de)(de)優越性，因為(wei)(wei)整個試(shi)(shi)(shi)驗(yan)(yan)裝置由幾臺(tai)(tai)單臺(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)組(zu)成(cheng)，單臺(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)容(rong)量(liang)小(xiao)、電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)低、重(zhong)量(liang)輕，便(bian)于(yu)運輸和安裝。它既(ji)然(ran)可串(chuan)接(jie)成(cheng)高(gao)出(chu)(chu)幾倍(bei)的(de)(de)(de)(de)(de)(de)(de)單臺(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)輸出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)組(zu)合使(shi)用，又可分開成(cheng)幾套(tao)單臺(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)單獨(du)使(shi)用。整套(tao)裝置投資(zi)小(xiao)，經濟實惠。圖5中(zhong)(zhong)(zhong)，在(zai)**級(ji)(ji)(ji)和**級(ji)(ji)(ji)的(de)(de)(de)(de)(de)(de)(de)每個單元試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)中(zhong)(zhong)(zhong)都(dou)有一個勵(li)磁(ci)繞(rao)(rao)組(zu)A1、C1和A2、C2。在(zai)三(san)(san)臺(tai)(tai)串(chuan)級(ji)(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)基本原理中(zhong)(zhong)(zhong)，低壓(ya)(ya)(ya)(ya)(ya)(ya)電(dian)(dian)(dian)(dian)源加在(zai)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)Ⅰ的(de)(de)(de)(de)(de)(de)(de)初級(ji)(ji)(ji)繞(rao)(rao)組(zu)a1x1上，單臺(tai)(tai)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)Ⅰ、Ⅱ、Ⅲ的(de)(de)(de)(de)(de)(de)(de)輸出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)都(dou)是V。勵(li)磁(ci)繞(rao)(rao)組(zu)A1、C1給(gei)**級(ji)(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)Ⅱ的(de)(de)(de)(de)(de)(de)(de)初級(ji)(ji)(ji)繞(rao)(rao)組(zu)供(gong)(gong)電(dian)(dian)(dian)(dian)；**級(ji)(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)Ⅱ的(de)(de)(de)(de)(de)(de)(de)勵(li)磁(ci)繞(rao)(rao)組(zu)A2、C2給(gei)第三(san)(san)級(ji)(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)Ⅲ的(de)(de)(de)(de)(de)(de)(de)初級(ji)(ji)(ji)繞(rao)(rao)組(zu)供(gong)(gong)電(dian)(dian)(dian)(dian)。**級(ji)(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)Ⅱ和第三(san)(san)級(ji)(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)Ⅲ的(de)(de)(de)(de)(de)(de)(de)箱體(ti)分別(bie)處在(zai)對地(di)為(wei)(wei)1V和2V的(de)(de)(de)(de)(de)(de)(de)高(gao)電(dian)(dian)(dian)(dian)位上，所以箱體(ti)對地(di)是絕緣的(de)(de)(de)(de)(de)(de)(de)，試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)Ⅰ的(de)(de)(de)(de)(de)(de)(de)箱體(ti)是接(jie)地(di)的(de)(de)(de)(de)(de)(de)(de)。這樣(yang)**級(ji)(ji)(ji)、**級(ji)(ji)(ji)、第三(san)(san)級(ji)(ji)(ji)試(shi)(shi)(shi)驗(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)對地(di)的(de)(de)(de)(de)(de)(de)(de)額定輸出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)分別(bie)為(wei)(wei)1V、2V、3V；其額定容(rong)量(liang)分別(bie)為(wei)(wei)3P、2P、1P。

YDQ系列高壓(ya)試(shi)驗變(bian)壓(ya)器做被試(shi)品的工(gong)頻(pin)耐壓(ya)試(shi)驗使用接(jie)線原理(li)圖見圖5。

圖(tu)中：R1—限流電(dian)阻 ; FRC—阻容分壓器 RF—球間隙(xi)保護電(dian)阻 G—球間隙(xi) CX—被試(shi)品

注：高壓尾必(bi)須(xu)可靠接(jie)地(di)

工頻耐(nai)壓(ya)試(shi)驗(yan)中限(xian)流(liu)電(dian)(dian)阻R1應(ying)根(gen)據試(shi)驗(yan)變壓(ya)器的(de)額定容量(liang)來選擇。如(ru)高壓(ya)側額定輸出(chu)電(dian)(dian)流(liu)在100～300mA時，可(ke)(ke)取0.5～1Ω/V(試(shi)驗(yan)電(dian)(dian)壓(ya))；高壓(ya)側額定輸出(chu)電(dian)(dian)流(liu)為(wei)1A以上時，可(ke)(ke)取1Ω/V(試(shi)驗(yan)電(dian)(dian)壓(ya))。常用水(shui)(shui)電(dian)(dian)阻作為(wei)限(xian)流(liu)電(dian)(dian)阻，管(guan)(guan)子長度可(ke)(ke)按(an)150kV/m考(kao)慮(lv)，管(guan)(guan)子粗(cu)細應(ying)具有足夠的(de)熱容量(liang)(水(shui)(shui)阻液(ye)配制方法：用蒸餾水(shui)(shui)加(jia)入適量(liang)硫酸銅(tong)配制成(cheng)各種不(bu)同的(de)阻值)。

球間(jian)隙及(ji)保護(hu)(hu)電阻：當電壓(ya)超過球間(jian)隙整定值時(一般取試驗(yan)電壓(ya)的110%~120%)，球間(jian)隙放電，對被試品(pin)起到保護(hu)(hu)作用。球間(jian)隙保護(hu)(hu)電阻可按1Ω/V(試驗(yan)電壓(ya))選(xuan)取。

在工(gong)頻耐壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)驗(yan)(yan)中(zhong)，低電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)側(ce)測量(liang)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(儀(yi)表(biao)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya))不是(shi)(shi)非常(chang)準確的(de)，其原因(yin)是(shi)(shi)由于(yu)(yu)試(shi)(shi)驗(yan)(yan)變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)存在著漏抗(kang)，在這個漏抗(kang)上必(bi)(bi)然存在著壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)降(jiang)或(huo)容(rong)升(sheng)，使試(shi)(shi)品(pin)(pin)上的(de)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)低于(yu)(yu)或(huo)高于(yu)(yu)低壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)側(ce)測量(liang)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)表(biao)上反映出來的(de)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)。工(gong)頻耐壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)驗(yan)(yan)時(shi)，被(bei)試(shi)(shi)品(pin)(pin)上的(de)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)高于(yu)(yu)試(shi)(shi)驗(yan)(yan)變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)的(de)輸出電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)，也(ye)就是(shi)(shi)所(suo)謂(wei)容(rong)升(sheng)現象(xiang)。感應耐壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)驗(yan)(yan)時(shi)，試(shi)(shi)驗(yan)(yan)變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)的(de)漏抗(kang)必(bi)(bi)然存在著壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)降(jiang)。為了(le)準確測量(liang)被(bei)試(shi)(shi)品(pin)(pin)上所(suo)施加的(de)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)，因(yin)此常(chang)在高壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)側(ce)接入FRC阻(zu)容(rong)分壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)來測量(liang)電(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(見圖5)。

工頻耐(nai)壓試驗操作(zuo)注意事項

1）試(shi)驗人員應(ying)做(zuo)好分工，明確相互間聯(lian)系方法。并有專門人監護現場**及觀察試(shi)品狀(zhuang)態。

2）被試品(pin)應先(xian)清掃干(gan)凈(jing)，并**干(gan)燥，以(yi)免損壞被試品(pin)和試驗帶來的誤差。

3）對于大型試(shi)(shi)驗，一(yi)般(ban)都應先(xian)進行空升(sheng)試(shi)(shi)驗。即不接試(shi)(shi)品時升(sheng)壓(ya)至試(shi)(shi)驗電壓(ya)，校對各種表(biao)計(ji)，調整球間(jian)隙。

4）升壓速度不(bu)能(neng)太快，并必須防止(zhi)突(tu)然(ran)加壓。例如調壓器不(bu)在(zai)零(ling)位時突(tu)然(ran)合閘(zha)。也不(bu)能(neng)突(tu)然(ran)切(qie)斷(duan)電源，一(yi)般應在(zai)調壓器降至零(ling)位時拉閘(zha)。

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

6）在升(sheng)壓或耐壓試(shi)驗(yan)過程(cheng)中，如發(fa)現(xian)下列(lie)不正常情況時，應立(li)即(ji)降壓，切(qie)斷電(dian)源。停止試(shi)驗(yan)并(bing)查明原因：①電(dian)壓表指針擺動很大(da)；②發(fa)現(xian)絕緣燒焦或冒煙；③被試(shi)品內有不正常的聲(sheng)音。

7）耐(nai)壓試(shi)驗前后應測量絕(jue)緣電阻，檢(jian)查絕(jue)緣情況(kuang)。

試(shi)(shi)驗變壓器(qi)在做被(bei)試(shi)(shi)品的直流(liu)耐(nai)壓或泄(xie)露(lu)試(shi)(shi)驗時接線原理圖如圖6。

注：此試驗應先抽出(chu)短(duan)路桿“D”，圖6中(zhong)所示。

圖中：VD—高壓(ya)硅堆 R1—限流電(dian)阻 C1—高壓(ya)濾波電(dian)容 FRC—阻容分壓(ya)器 CX—被(bei)試(shi)品 μA—帶保(bao)護微安表

泄露試(shi)驗中限流(liu)(liu)電(dian)(dian)(dian)(dian)阻(zu)(zu)R1選擇(ze)在額定輸出電(dian)(dian)(dian)(dian)壓(ya)時，輸出端短路電(dian)(dian)(dian)(dian)流(liu)(liu)不超過高壓(ya)硅堆(dui)的*大(da)整流(liu)(liu)。如電(dian)(dian)(dian)(dian)壓(ya)硅堆(dui)的*大(da)整流(liu)(liu)電(dian)(dian)(dian)(dian)流(liu)(liu)為100mA時用于60kV的試(shi)驗裝(zhuang)置中，限流(liu)(liu)電(dian)(dian)(dian)(dian)阻(zu)(zu)按R1=60/0.1=600kΩ選擇(ze)。限流(liu)(liu)電(dian)(dian)(dian)(dian)阻(zu)(zu)還應具有足夠的容量和沿面放電(dian)(dian)(dian)(dian)距(ju)離。

高壓濾波(bo)電容C1一(yi)般選擇在(zai)0.01~0.1μF，當被試品的電容量很(hen)大(da)時，C1可省略(lve)不用。

泄露試(shi)驗的操作及注意(yi)事項

1）試(shi)驗(yan)前應先檢查被試(shi)品(pin)是否停電(dian)，接地放電(dian)，一切對外(wai)連線(xian)是否擦干(gan)凈。要嚴防將試(shi)驗(yan)電(dian)壓加到有人工作的部位上去。

2）接好(hao)試(shi)驗(yan)裝置的接線(xian)后(hou)，應(ying)(ying)復查無誤后(hou)才(cai)可(ke)加壓。應(ying)(ying)特別注意檢查高壓設備及引線(xian)與地(di)、與操作(zuo)人員的**距離，被試(shi)品的外殼是否可(ke)靠接地(di)，要按(an)**規(gui)程中所(suo)規(gui)定的內(nei)容進(jin)行(xing)試(shi)驗(yan)。

3）對于大電(dian)容量設備應緩慢(man)升(sheng)壓(ya)(ya)，防(fang)止(zhi)被試品的充電(dian)電(dian)流燒壞微(wei)(wei)安表(biao)。必要時應分(fen)級加(jia)壓(ya)(ya)，分(fen)別(bie)讀取各級電(dian)壓(ya)(ya)下微(wei)(wei)安表(biao)的穩(wen)定(ding)讀數。

4）試驗(yan)過程中，應(ying)密切(qie)(qie)監視(shi)被(bei)試品、試驗(yan)裝置(zhi)、微(wei)安表，一旦發生擊穿(chuan)、閃爍等異常現象應(ying)立即降(jiang)壓，切(qie)(qie)斷電源，并(bing)查明原因，詳(xiang)細記(ji)錄。

5）試(shi)驗完畢，降壓，切(qie)斷電(dian)源后應將被試(shi)品及試(shi)驗裝置本身(shen)充分放電(dian)。

四、WBTQSB-3KVA/50KV高壓試驗變壓器注意事項

1、按(an)照您所進行的試(shi)驗(yan)(yan)接(jie)好工作線(xian)路。試(shi)驗(yan)(yan)變(bian)壓(ya)器(qi)的外殼以及操作系統的外殼必須(xu)可靠(kao)(kao)接(jie)地(di)(di)。試(shi)驗(yan)(yan)變(bian)壓(ya)器(qi)高(gao)壓(ya)繞(rao)組(zu)的X端(高(gao)壓(ya)尾)以及測量繞(rao)組(zu)的F端必須(xu)可靠(kao)(kao)接(jie)地(di)(di)。

2、做串級(ji)試驗時，**級(ji)、第(di)三級(ji)試驗變壓器的低壓繞組的X端，測量(liang)繞組的F端以及高(gao)壓繞組的X端(高(gao)壓尾)均接本級(ji)試驗變壓器的外殼(ke)。**級(ji)、第(di)三級(ji)試驗變壓器的外殼(ke)必須通過絕(jue)緣(yuan)支架接地。

3、接通電源(yuan)前，操作系統(tong)的調(diao)壓器必須調(diao)到零位后方可接通電源(yuan)，合閘，開始升壓。

4、從零(ling)開(kai)始均勻旋轉調壓(ya)(ya)(ya)器手輪升(sheng)(sheng)壓(ya)(ya)(ya)。升(sheng)(sheng)壓(ya)(ya)(ya)方法(fa)有：快速升(sheng)(sheng)壓(ya)(ya)(ya)法(fa)，即(ji)20s逐級升(sheng)(sheng)壓(ya)(ya)(ya)法(fa)；慢(man)速升(sheng)(sheng)壓(ya)(ya)(ya)法(fa)，即(ji)60s逐級升(sheng)(sheng)壓(ya)(ya)(ya)法(fa)；極慢(man)速升(sheng)(sheng)壓(ya)(ya)(ya)法(fa)供(gong)選用。電壓(ya)(ya)(ya)從零(ling)開(kai)始按一定的(de)(de)升(sheng)(sheng)壓(ya)(ya)(ya)方式和速度(du)上升(sheng)(sheng)到您所需(xu)的(de)(de)額定試(shi)驗電壓(ya)(ya)(ya)的(de)(de)75%后，在以每(mei)秒2%額定試(shi)驗電壓(ya)(ya)(ya)的(de)(de)速度(du)升(sheng)(sheng)到您所需(xu)的(de)(de)額定電壓(ya)(ya)(ya)，并(bing)密(mi)切注意測量儀表的(de)(de)指示以及被(bei)試(shi)品(pin)的(de)(de)情(qing)況。升(sheng)(sheng)壓(ya)(ya)(ya)過程中或試(shi)驗過程中如發現測量儀表的(de)(de)指示及被(bei)試(shi)品(pin)情(qing)況異(yi)常，應立(li)即(ji)降壓(ya)(ya)(ya)，切斷電源，查明(ming)情(qing)況。

5、試驗完(wan)畢后，應(ying)在數秒(miao)內勻速的將調壓器返回至零位，然后切(qie)斷電(dian)源。

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

7、再升壓(ya)或耐壓(ya)試驗(yan)過程中(zhong)，如發(fa)現以下不正常(chang)情況時，應立即降壓(ya)，切斷(duan)電源，停止試驗(yan)并查(cha)明原(yuan)因。

⑴電壓表指針擺動(dong)(或數字跳動(dong))很(hen)大

⑵電流表直(zhi)線上升

被(bei)試品內有不正常(chang)的聲音

8、圖1中第(di)9項系壓力(li)閥(fa)及壓力(li)表，為(wei)長期關閉狀態。每6個(ge)月開閥(fa)一次，以檢查SF6壓力(li)，應(ying)不小于0.2MPa(檢查壓力(li)后立即關閉閥(fa)門)，低于0.2MPa時應(ying)加(jia)SF6氣體，以增(zeng)加(jia)氣絕緣。

9、耐(nai)壓實(shi)驗前(qian)后應測(ce)量被(bei)試設備的絕緣(yuan)(yuan)電阻，檢查絕緣(yuan)(yuan)情(qing)況。

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

11、該(gai)產品不(bu)允許在高(gao)于45℃的溫度下長期(qi)存放(fang)、使用、放(fang)氣。

12、運輸搬運途中不(bu)得重力沖擊。

13、產品(pin)緊固件及壓力閥、壓力表不得擅自松動。

14、使用本產品(pin)做高(gao)壓試(shi)驗(yan)(yan)時(shi)，出熟(shu)悉本說(shuo)明書外，還必須嚴格執行國家有關標準和(he)操作規程。可參照GB311-83《高(gao)壓輸變設備(bei)的絕(jue)緣配合，高(gao)壓試(shi)驗(yan)(yan)技(ji)術》；《電氣設備(bei)預防性試(shi)驗(yan)(yan)規程》等。

五、WBTQSB-3KVA/50KV高壓試驗變壓器容量選擇

標稱試驗變(bian)壓器容(rong)量Pn的確定公式：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(de)額定輸(shu)出(chu)高壓(ya)的(de)有(you)效值(kV)

k ——**系(xi)數。k≥1，標稱電壓Vn≥1MV時，k=2；標稱電壓較(jiao)低(di)時，k值(zhi)可取高一些(xie)。

Ct——被試品(pin)的電容量(pF)

ω——角頻率(lv)，ω=2πf， f——試驗(yan)電源的(de)頻率(lv)

被試設備的(de)(de)電容量Ct可由交流電橋測出(chu)。Ct的(de)(de)變化很大，

可由設(she)備的(de)類型(xing)而定。

典型數據如下：

簡(jian)單的棒式或懸式絕(jue)緣子   幾十微法