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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)高壓(ya)試驗變壓(ya)器(qi)

產品型號: WBTQSB-20KVA/100KV

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產品簡介

WBTQSB-20KVA/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、WBTQSB-20KVA/100KV便攜式高壓試驗變壓器概(gai)述

YDQ系(xi)(xi)列(lie)高壓(ya)試(shi)(shi)驗(yan)變(bian)壓(ya)器是根據《試(shi)(shi)驗(yan)變(bian)壓(ya)器》標準(zhun)，在(zai)(zai)油(you)浸式(shi)試(shi)(shi)驗(yan)變(bian)壓(ya)器的(de)(de)(de)(de)基礎上而設計(ji)生(sheng)產(chan)的(de)(de)(de)(de)。SF6氣(qi)體具有良好的(de)(de)(de)(de)電(dian)(dian)氣(qi)絕(jue)(jue)緣性能(neng)及優異的(de)(de)(de)(de)滅(mie)弧性能(neng)，其耐壓(ya)強度為(wei)同一壓(ya)力(li)下氮(dan)氣(qi)的(de)(de)(de)(de)2.5倍，擊穿(chuan)電(dian)(dian)壓(ya)的(de)(de)(de)(de)空(kong)氣(qi)的(de)(de)(de)(de)2.5倍。在(zai)(zai)0.25MPa下與油(you)的(de)(de)(de)(de)擊穿(chuan)電(dian)(dian)壓(ya)相等(deng)，在(zai)(zai)0.45MPa壓(ya)力(li)下是油(you)的(de)(de)(de)(de)擊穿(chuan)電(dian)(dian)壓(ya)的(de)(de)(de)(de)2倍，是一種優于(yu)油(you)的(de)(de)(de)(de)新一代超(chao)高壓(ya)絕(jue)(jue)緣介質(zhi)材料(liao)。該產(chan)品(pin)技(ji)術要求完全符合《ZBK-41006-89》標準(zhun)，它是油(you)浸式(shi)輕(qing)(qing)型試(shi)(shi)驗(yan)變(bian)壓(ya)器的(de)(de)(de)(de)換代產(chan)品(pin)。該產(chan)品(pin)具有體積小(xiao)、重量(liang)輕(qing)(qing)、不受(shou)氣(qi)候(hou)變(bian)化影響、電(dian)(dian)暈(yun)小(xiao)、現場(chang)搬運無需靜止可使用，使用壽命長、免(mian)維修等(deng)特點。適(shi)用于(yu)電(dian)(dian)力(li)系(xi)(xi)統、工礦企(qi)業、科研部(bu)門等(deng)對各種高壓(ya)電(dian)(dian)氣(qi)設備(bei)、電(dian)(dian)氣(qi)元件(jian)、絕(jue)(jue)緣材料(liao)進(jin)行工頻或直流高壓(ya)下的(de)(de)(de)(de)絕(jue)(jue)緣強度試(shi)(shi)驗(yan)。

二、WBTQSB-20KVA/100KV便攜式高壓試驗變壓器產品結構

YDQ系列高壓(ya)試驗變壓(ya)器采(cai)用(yong)單框芯(xin)式鐵芯(xin)結構，初級繞(rao)(rao)組繞(rao)(rao)在鐵芯(xin)上(shang)，高壓(ya)繞(rao)(rao)組在外，這種(zhong)同軸(zhou)布置(zhi)減少(shao)了漏磁(ci)通，因而增大了繞(rao)(rao)組間的耦(ou)合。產品的外殼為圓(yuan)柱灌式容器結構，能耐(nai)受0.8MPa以上(shang)壓(ya)力(li)。其結構見圖1：

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

三、WBTQSB-20KVA/100KV便攜式高壓試驗變壓器工作原理

YDQ系(xi)列高壓(ya)(ya)試(shi)(shi)驗(yan)變(bian)壓(ya)(ya)器(qi)(qi)為(wei)(wei)單相變(bian)壓(ya)(ya)器(qi)(qi)，聯結(jie)組標號Ⅰ.Ⅰ. 用工頻(pin)220V(10kVA以上為(wei)(wei)380V)電(dian)源接入(ru) (為(wei)(wei)本(ben)公司生產的試(shi)(shi)驗(yan)變(bian)壓(ya)(ya)器(qi)(qi)配套專用設備(bei)，詳細(xi)資料請見其具(ju)體使用說明書)系(xi)列操(cao)作(zuo)箱(臺)，經(jing)操(cao)作(zuo)箱內自(zi)偶調(diao)(diao)壓(ya)(ya)器(qi)(qi)(50kVA以上調(diao)(diao)壓(ya)(ya)器(qi)(qi)外(wai)附)調(diao)(diao)節至0～200V(或0～400V)電(dian)壓(ya)(ya)輸(shu)出(chu)至YDQ試(shi)(shi)驗(yan)變(bian)壓(ya)(ya)器(qi)(qi)的初(chu)級繞組，根據(ju)電(dian)磁感(gan)應原理(li)，在試(shi)(shi)驗(yan)變(bian)壓(ya)(ya)器(qi)(qi)高壓(ya)(ya)繞組可獲得試(shi)(shi)驗(yan)所需的高電(dian)壓(ya)(ya)。

單臺(tai)YDQ系(xi)列(lie)高壓試驗變壓器的工作(zuo)原理圖見圖2。

單臺YDQ系列交直(zhi)流(liu)高(gao)壓試驗(yan)變壓器(qi)的工作(zuo)原理圖見圖3，圖中(zhong)高(gao)壓套管中(zhong)裝有高(gao)壓硅(gui)堆，串接在高(gao)壓回路(lu)中(zhong)作(zuo)半(ban)波整流(liu)，以獲(huo)得(de)直(zhi)流(liu)高(gao)電(dian)壓。當用一短(duan)路(lu)桿(gan)將高(gao)壓硅(gui)堆短(duan)接時(shi)，可獲(huo)得(de)工頻高(gao)電(dian)壓，作(zuo)為交流(liu)輸(shu)(shu)出(chu)狀(zhuang)態(tai)(tai)；取(qu)消短(duan)路(lu)桿(gan)時(shi)，作(zuo)為直(zhi)流(liu)輸(shu)(shu)出(chu)狀(zhuang)態(tai)(tai)。

試驗(yan)變壓器(qi)高壓套(tao)管中的高壓硅堆未畫(hua)出，其原理與(yu)上圖相同。

三臺(tai)(tai)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)串級(ji)(ji)(ji)獲得更高(gao)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)接(jie)線原(yuan)理見圖(tu)4。串級(ji)(ji)(ji)高(gao)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)有很大(da)的(de)優越性(xing)，因為(wei)整個試(shi)驗(yan)(yan)(yan)裝(zhuang)置由幾(ji)臺(tai)(tai)單(dan)臺(tai)(tai)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)組(zu)(zu)成，單(dan)臺(tai)(tai)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)容(rong)量小、電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)低、重量輕，便(bian)于(yu)運輸(shu)和安裝(zhuang)。它既(ji)然(ran)可(ke)串接(jie)成高(gao)出(chu)(chu)幾(ji)倍的(de)單(dan)臺(tai)(tai)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)組(zu)(zu)合使用(yong)，又可(ke)分(fen)(fen)開成幾(ji)套單(dan)臺(tai)(tai)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)單(dan)獨(du)使用(yong)。整套裝(zhuang)置投(tou)資(zi)小，經濟(ji)實惠。圖(tu)5中，在(zai)**級(ji)(ji)(ji)和**級(ji)(ji)(ji)的(de)每個單(dan)元(yuan)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)中都有一個勵(li)(li)磁繞(rao)(rao)組(zu)(zu)A1、C1和A2、C2。在(zai)三臺(tai)(tai)串級(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)基(ji)本原(yuan)理中，低壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)電(dian)(dian)(dian)(dian)源加在(zai)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)Ⅰ的(de)初級(ji)(ji)(ji)繞(rao)(rao)組(zu)(zu)a1x1上，單(dan)臺(tai)(tai)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)Ⅰ、Ⅱ、Ⅲ的(de)輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)都是V。勵(li)(li)磁繞(rao)(rao)組(zu)(zu)A1、C1給**級(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)Ⅱ的(de)初級(ji)(ji)(ji)繞(rao)(rao)組(zu)(zu)供電(dian)(dian)(dian)(dian)；**級(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)Ⅱ的(de)勵(li)(li)磁繞(rao)(rao)組(zu)(zu)A2、C2給第三級(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)Ⅲ的(de)初級(ji)(ji)(ji)繞(rao)(rao)組(zu)(zu)供電(dian)(dian)(dian)(dian)。**級(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)Ⅱ和第三級(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)Ⅲ的(de)箱體(ti)分(fen)(fen)別(bie)(bie)處在(zai)對地為(wei)1V和2V的(de)高(gao)電(dian)(dian)(dian)(dian)位上，所以箱體(ti)對地是絕(jue)緣(yuan)的(de)，試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)Ⅰ的(de)箱體(ti)是接(jie)地的(de)。這(zhe)樣**級(ji)(ji)(ji)、**級(ji)(ji)(ji)、第三級(ji)(ji)(ji)試(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)對地的(de)額定(ding)輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)分(fen)(fen)別(bie)(bie)為(wei)1V、2V、3V；其額定(ding)容(rong)量分(fen)(fen)別(bie)(bie)為(wei)3P、2P、1P。

YDQ系列高壓試驗變壓器做被(bei)試品的工頻耐(nai)壓試驗使用接(jie)線原理(li)圖見(jian)圖5。

圖中：R1—限流(liu)電阻 FRC—阻容(rong)分壓器 RF—球(qiu)間(jian)隙(xi)保護(hu)電阻 G—球(qiu)間(jian)隙(xi) CX—被試(shi)品

注：高(gao)壓尾必須可靠(kao)接地(di)

工頻耐(nai)壓(ya)試(shi)(shi)驗中限流(liu)電(dian)阻(zu)(zu)R1應根據試(shi)(shi)驗變壓(ya)器的(de)額定容(rong)量來選擇(ze)。如(ru)高壓(ya)側(ce)額定輸(shu)出電(dian)流(liu)在(zai)100～300mA時，可取0.5～1Ω/V(試(shi)(shi)驗電(dian)壓(ya))；高壓(ya)側(ce)額定輸(shu)出電(dian)流(liu)為1A以上時，可取1Ω/V(試(shi)(shi)驗電(dian)壓(ya))。常用(yong)水電(dian)阻(zu)(zu)作為限流(liu)電(dian)阻(zu)(zu)，管子(zi)長(chang)度(du)可按150kV/m考慮，管子(zi)粗(cu)細應具(ju)有足夠的(de)熱(re)容(rong)量(水阻(zu)(zu)液配(pei)(pei)制方法：用(yong)蒸餾(liu)水加入適量硫酸銅配(pei)(pei)制成各種不同的(de)阻(zu)(zu)值)。

球(qiu)間(jian)(jian)隙及(ji)保(bao)護電(dian)阻：當電(dian)壓超過球(qiu)間(jian)(jian)隙整定值時(shi)(一(yi)般取(qu)試驗電(dian)壓的110%~120%)，球(qiu)間(jian)(jian)隙放電(dian)，對被試品起到保(bao)護作用。球(qiu)間(jian)(jian)隙保(bao)護電(dian)阻可按1Ω/V(試驗電(dian)壓)選取(qu)。

在(zai)(zai)(zai)工頻耐(nai)壓(ya)(ya)(ya)(ya)(ya)試(shi)(shi)驗(yan)中，低電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)側測(ce)(ce)量電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(儀表(biao)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya))不(bu)是(shi)非常(chang)準(zhun)確的，其原(yuan)因是(shi)由于(yu)試(shi)(shi)驗(yan)變壓(ya)(ya)(ya)(ya)(ya)器(qi)存在(zai)(zai)(zai)著漏抗(kang)，在(zai)(zai)(zai)這(zhe)個漏抗(kang)上必然(ran)存在(zai)(zai)(zai)著壓(ya)(ya)(ya)(ya)(ya)降(jiang)(jiang)或(huo)容(rong)升，使(shi)試(shi)(shi)品(pin)上的電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)低于(yu)或(huo)高(gao)(gao)于(yu)低壓(ya)(ya)(ya)(ya)(ya)側測(ce)(ce)量電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)表(biao)上反映(ying)出來的電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)。工頻耐(nai)壓(ya)(ya)(ya)(ya)(ya)試(shi)(shi)驗(yan)時，被試(shi)(shi)品(pin)上的電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)高(gao)(gao)于(yu)試(shi)(shi)驗(yan)變壓(ya)(ya)(ya)(ya)(ya)器(qi)的輸出電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)，也就(jiu)是(shi)所(suo)謂容(rong)升現(xian)象。感(gan)應耐(nai)壓(ya)(ya)(ya)(ya)(ya)試(shi)(shi)驗(yan)時，試(shi)(shi)驗(yan)變壓(ya)(ya)(ya)(ya)(ya)器(qi)的漏抗(kang)必然(ran)存在(zai)(zai)(zai)著壓(ya)(ya)(ya)(ya)(ya)降(jiang)(jiang)。為了準(zhun)確測(ce)(ce)量被試(shi)(shi)品(pin)上所(suo)施加的電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)，因此常(chang)在(zai)(zai)(zai)高(gao)(gao)壓(ya)(ya)(ya)(ya)(ya)側接入FRC阻容(rong)分壓(ya)(ya)(ya)(ya)(ya)器(qi)來測(ce)(ce)量電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(見圖(tu)5)。

工頻耐壓試驗操作注意事(shi)項

1）試驗人員應做好分工，明確相互間聯系方(fang)法。并有專(zhuan)門人監護現場**及觀察試品狀態(tai)。

2）被(bei)試品(pin)應先清掃干凈，并**干燥，以(yi)免損(sun)壞被(bei)試品(pin)和試驗帶來的誤(wu)差。

3）對于大型試驗(yan)(yan)，一般都(dou)應先進行空升試驗(yan)(yan)。即不(bu)接試品時升壓至試驗(yan)(yan)電壓，校對各(ge)種表計，調整球間隙。

4）升壓速度(du)不能太快，并(bing)必須防止突(tu)然加壓。例如(ru)調壓器(qi)不在零位時(shi)突(tu)然合閘(zha)。也(ye)不能突(tu)然切(qie)斷電(dian)源，一般應在調壓器(qi)降至零位時(shi)拉閘(zha)。

5）當(dang)電(dian)壓(ya)升至(zhi)試(shi)驗(yan)電(dian)壓(ya)時(shi)，開(kai)始計時(shi)，到1min后，迅速降(jiang)壓(ya)到1/3試(shi)驗(yan)電(dian)壓(ya)以下時(shi)，才能拉開(kai)電(dian)源(yuan)。

6）在升壓或(huo)耐壓試驗(yan)過程中(zhong)，如發現下列不(bu)正(zheng)常情況時，應立即降壓，切斷電源。停止試驗(yan)并查明(ming)原因：①電壓表(biao)指針擺動很(hen)大；②發現絕緣燒焦(jiao)或(huo)冒煙；③被試品內(nei)有不(bu)正(zheng)常的聲音。

7）耐(nai)壓試驗前后(hou)應測量絕(jue)緣(yuan)電阻，檢查絕(jue)緣(yuan)情況。

試(shi)驗(yan)變壓器在(zai)做(zuo)被試(shi)品(pin)的(de)直流耐壓或泄(xie)露試(shi)驗(yan)時接線原理圖如(ru)圖6。

注(zhu)：此試驗應先抽出短路桿“D”，圖6中所(suo)示。

圖中(zhong)：VD—高壓硅堆 R1—限流電(dian)阻(zu) C1—高壓濾波電(dian)容(rong) FRC—阻(zu)容(rong)分壓器 ; CX—被試品 μA—帶保護微安表

泄(xie)露試驗(yan)中(zhong)限流電阻(zu)R1選擇(ze)在額定輸出電壓時，輸出端短路電流不超過高壓硅(gui)堆(dui)的*大(da)整(zheng)流。如電壓硅(gui)堆(dui)的*大(da)整(zheng)流電流為100mA時用于60kV的試驗(yan)裝置中(zhong)，限流電阻(zu)按(an)R1=60/0.1=600kΩ選擇(ze)。限流電阻(zu)還應具有(you)足夠(gou)的容量和沿(yan)面放(fang)電距(ju)離。

高壓濾波電容(rong)(rong)C1一般選擇在0.01~0.1μF，當被試品的電容(rong)(rong)量很大(da)時，C1可省略不用。

泄露試驗的操作(zuo)及注意(yi)事項

1）試(shi)(shi)驗前應先檢查被試(shi)(shi)品是否停電(dian)，接地放電(dian)，一(yi)切對外連線是否擦干凈。要嚴防(fang)將試(shi)(shi)驗電(dian)壓加到有人工(gong)作的(de)部位上去。

2）接(jie)好(hao)試(shi)驗裝置的(de)接(jie)線后(hou)，應復查(cha)無誤后(hou)才可(ke)加壓。應特別注(zhu)意檢查(cha)高壓設(she)備及引線與(yu)地(di)、與(yu)操作人員的(de)**距離(li)，被試(shi)品的(de)外殼是否可(ke)靠(kao)接(jie)地(di)，要(yao)按**規(gui)程中所(suo)規(gui)定的(de)內容進行(xing)試(shi)驗。

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

4）試驗過程中(zhong)，應(ying)密切監視(shi)被試品、試驗裝(zhuang)置、微安表，一旦發(fa)生擊穿、閃爍(shuo)等(deng)異常現象應(ying)立即(ji)降(jiang)壓，切斷電源，并查明原因(yin)，詳細記錄。

5）試驗(yan)完畢，降(jiang)壓，切斷電源后(hou)應將被試品及試驗(yan)裝置本身充分(fen)放電。

四、WBTQSB-20KVA/100KV便攜式高壓試驗變壓器注意事項

1、按(an)照您所進行(xing)的試(shi)(shi)驗(yan)接好工作(zuo)線(xian)路。試(shi)(shi)驗(yan)變壓(ya)器(qi)(qi)的外殼以(yi)(yi)及(ji)操作(zuo)系統的外殼必須可(ke)(ke)靠(kao)(kao)接地(di)。試(shi)(shi)驗(yan)變壓(ya)器(qi)(qi)高(gao)壓(ya)繞組的X端(高(gao)壓(ya)尾)以(yi)(yi)及(ji)測量繞組的F端必須可(ke)(ke)靠(kao)(kao)接地(di)。

2、做串級試(shi)(shi)驗(yan)時(shi)，**級、第(di)三(san)級試(shi)(shi)驗(yan)變(bian)壓(ya)器(qi)的低壓(ya)繞(rao)組的X端(duan)(duan)，測量(liang)繞(rao)組的F端(duan)(duan)以(yi)及高壓(ya)繞(rao)組的X端(duan)(duan)(高壓(ya)尾)均接本級試(shi)(shi)驗(yan)變(bian)壓(ya)器(qi)的外殼(ke)。**級、第(di)三(san)級試(shi)(shi)驗(yan)變(bian)壓(ya)器(qi)的外殼(ke)必須通過絕(jue)緣支(zhi)架接地。

3、接通電源前，操作(zuo)系統的(de)調壓(ya)器必須調到零位后方可接通電源，合閘，開始升(sheng)壓(ya)。

4、從零開始均(jun)勻旋轉調壓(ya)(ya)(ya)(ya)器手輪升壓(ya)(ya)(ya)(ya)。升壓(ya)(ya)(ya)(ya)方法有：快速升壓(ya)(ya)(ya)(ya)法，即(ji)20s逐(zhu)級升壓(ya)(ya)(ya)(ya)法；慢(man)速升壓(ya)(ya)(ya)(ya)法，即(ji)60s逐(zhu)級升壓(ya)(ya)(ya)(ya)法；極(ji)慢(man)速升壓(ya)(ya)(ya)(ya)法供選用。電(dian)(dian)壓(ya)(ya)(ya)(ya)從零開始按一(yi)定的(de)升壓(ya)(ya)(ya)(ya)方式(shi)和速度(du)上升到(dao)您所(suo)需的(de)額(e)(e)定試(shi)驗電(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)75%后，在以每秒2%額(e)(e)定試(shi)驗電(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)速度(du)升到(dao)您所(suo)需的(de)額(e)(e)定電(dian)(dian)壓(ya)(ya)(ya)(ya)，并(bing)密切(qie)注意測量儀(yi)表(biao)的(de)指(zhi)示(shi)以及(ji)被試(shi)品(pin)的(de)情(qing)(qing)況。升壓(ya)(ya)(ya)(ya)過程中(zhong)或試(shi)驗過程中(zhong)如發現測量儀(yi)表(biao)的(de)指(zhi)示(shi)及(ji)被試(shi)品(pin)情(qing)(qing)況異常，應立即(ji)降壓(ya)(ya)(ya)(ya)，切(qie)斷(duan)電(dian)(dian)源，查明情(qing)(qing)況。

5、試驗(yan)完畢后(hou)，應在數秒(miao)內勻速的將調壓器返回(hui)至零位，然后(hou)切斷電源。

6、本產品不(bu)得超(chao)過(guo)額定參(can)數使用。除(chu)試驗必(bi)須外，決不(bu)允許全(quan)電(dian)壓通電(dian)或(huo)斷電(dian)。

7、再升(sheng)壓或耐(nai)壓試(shi)驗過程中，如發現以下不正常情(qing)況(kuang)時(shi)，應立即降壓，切斷電源，停止試(shi)驗并(bing)查明原因。

⑴電壓(ya)表指針擺動(或數字跳動)很大

⑵電(dian)流表直(zhi)線上(shang)升

被試品內(nei)有不正常(chang)的聲音(yin)

8、圖(tu)1中第9項(xiang)系(xi)壓力(li)閥及壓力(li)表，為長期關閉(bi)狀態。每6個月(yue)開閥一次，以(yi)檢查SF6壓力(li)，應不小于(yu)0.2MPa(檢查壓力(li)后(hou)立即(ji)關閉(bi)閥門)，低于(yu)0.2MPa時應加SF6氣體，以(yi)增加氣絕緣。

9、耐壓實驗前后應測量(liang)被(bei)試設備(bei)的絕緣(yuan)電阻，檢(jian)查(cha)絕緣(yuan)情況。

10、當試驗變壓器長期不使用時，應放(fang)置于通風、干燥、無陽(yang)光(guang)直射(she)的地方。

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

12、運輸(shu)搬運途中不得重力沖擊(ji)。

13、產品緊固件及壓力(li)閥、壓力(li)表不得擅(shan)自(zi)松動。

14、使用本產品(pin)做高(gao)(gao)壓(ya)試(shi)(shi)驗(yan)(yan)(yan)時(shi)，出熟悉本說(shuo)明書外，還必須嚴(yan)格(ge)執行國家有關標準(zhun)和操(cao)作規程。可參照(zhao)GB311-83《高(gao)(gao)壓(ya)輸變設備的絕緣配合，高(gao)(gao)壓(ya)試(shi)(shi)驗(yan)(yan)(yan)技術(shu)》；《電氣(qi)設備預防性試(shi)(shi)驗(yan)(yan)(yan)規程》等。

五、WBTQSB-20KVA/100KV便攜式高壓試驗變壓器容量選擇

標稱(cheng)試(shi)驗變壓器容(rong)量Pn的確定公式：Pn=kVn 2ωCt×10-9

式中：

Pn——標稱試驗變壓器容(rong)量(kVA)

Vn——試驗變壓器(qi)的額(e)定輸出高壓的有效值(kV)

k ——**系數。k≥1，標稱電(dian)壓(ya)Vn≥1MV時，k=2；標稱電(dian)壓(ya)較低時，k值可取高一些。

Ct——被試品(pin)的電容量(pF)

ω——角頻率，ω=2πf， f——試驗電源(yuan)的頻率

被試設(she)備的電容量Ct可(ke)由交流電橋測出。Ct的變化很大，

可由設備的類型(xing)而(er)定。

典型數據如下：

簡(jian)單的棒式(shi)或(huo)懸式(shi)絕緣子 ;   幾十微(wei)法