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高壓試驗變壓器

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產品名稱: 高(gao)壓試(shi)驗變壓器

產品型號: WBYD-150KV

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WBYD-150KV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、WBYD-150KV高壓試驗變壓器概述

YDQ系列高(gao)(gao)壓(ya)(ya)(ya)(ya)試驗(yan)變(bian)壓(ya)(ya)(ya)(ya)器(qi)是(shi)根據(ju)《試驗(yan)變(bian)壓(ya)(ya)(ya)(ya)器(qi)》標準，在(zai)(zai)油(you)(you)浸式試驗(yan)變(bian)壓(ya)(ya)(ya)(ya)器(qi)的(de)(de)(de)(de)基礎上而(er)設計生產(chan)(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)緣性(xing)能(neng)(neng)及優異(yi)的(de)(de)(de)(de)滅弧性(xing)能(neng)(neng)，其耐壓(ya)(ya)(ya)(ya)強度為同一壓(ya)(ya)(ya)(ya)力(li)下氮氣(qi)的(de)(de)(de)(de)2.5倍，擊(ji)穿電(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)空氣(qi)的(de)(de)(de)(de)2.5倍。在(zai)(zai)0.25MPa下與(yu)油(you)(you)的(de)(de)(de)(de)擊(ji)穿電(dian)(dian)壓(ya)(ya)(ya)(ya)相等，在(zai)(zai)0.45MPa壓(ya)(ya)(ya)(ya)力(li)下是(shi)油(you)(you)的(de)(de)(de)(de)擊(ji)穿電(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)2倍，是(shi)一種(zhong)(zhong)優于(yu)油(you)(you)的(de)(de)(de)(de)新(xin)一代超高(gao)(gao)壓(ya)(ya)(ya)(ya)絕(jue)緣介(jie)質(zhi)材料。該產(chan)(chan)品(pin)(pin)技(ji)術要求完全符合(he)《ZBK-41006-89》標準，它是(shi)油(you)(you)浸式輕(qing)型試驗(yan)變(bian)壓(ya)(ya)(ya)(ya)器(qi)的(de)(de)(de)(de)換代產(chan)(chan)品(pin)(pin)。該產(chan)(chan)品(pin)(pin)具有體積小(xiao)、重(zhong)量輕(qing)、不(bu)受(shou)氣(qi)候變(bian)化(hua)影響、電(dian)(dian)暈(yun)小(xiao)、現場搬運無需靜止可使(shi)用，使(shi)用壽命長、免維修(xiu)等特點。適用于(yu)電(dian)(dian)力(li)系統(tong)、工(gong)礦企業(ye)、科研部門等對各種(zhong)(zhong)高(gao)(gao)壓(ya)(ya)(ya)(ya)電(dian)(dian)氣(qi)設備、電(dian)(dian)氣(qi)元件、絕(jue)緣材料進(jin)行(xing)工(gong)頻或直(zhi)流高(gao)(gao)壓(ya)(ya)(ya)(ya)下的(de)(de)(de)(de)絕(jue)緣強度試驗(yan)。

二、WBYD-150KV高壓試驗變壓器產品結構

YDQ系列高壓試驗變壓器(qi)采用單框(kuang)芯(xin)式鐵芯(xin)結構(gou)(gou)，初級繞組繞在鐵芯(xin)上，高壓繞組在外，這種同軸布置減少了漏磁(ci)通，因(yin)而(er)增大了繞組間(jian)的耦(ou)合。產(chan)品的外殼為圓(yuan)柱灌式容(rong)器(qi)結構(gou)(gou)，能耐受0.8MPa以(yi)上壓力。其(qi)結構(gou)(gou)見圖1：

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

三、WBYD-150KV高壓試驗變壓器工作原理

YDQ系列高(gao)(gao)壓(ya)(ya)(ya)試(shi)驗變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)為單相變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)，聯結組標號Ⅰ.Ⅰ. 用(yong)工頻220V(10kVA以上為380V)電(dian)源接入 (為本公司生產的(de)試(shi)驗變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)配套專用(yong)設備(bei)，詳細資料請(qing)見其(qi)具體(ti)使用(yong)說明書)系列操作箱(xiang)(xiang)(臺)，經(jing)操作箱(xiang)(xiang)內自偶調壓(ya)(ya)(ya)器(qi)(qi)(qi)(50kVA以上調壓(ya)(ya)(ya)器(qi)(qi)(qi)外附)調節至0～200V(或0～400V)電(dian)壓(ya)(ya)(ya)輸(shu)出至YDQ試(shi)驗變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)的(de)初(chu)級繞組，根據(ju)電(dian)磁感應原理，在試(shi)驗變(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)高(gao)(gao)壓(ya)(ya)(ya)繞組可獲得(de)試(shi)驗所需的(de)高(gao)(gao)電(dian)壓(ya)(ya)(ya)。

單臺(tai)YDQ系列高壓試驗變壓器的工作原理(li)圖見圖2。

單臺(tai)YDQ系列(lie)交直(zhi)流(liu)高(gao)(gao)(gao)壓(ya)(ya)試(shi)驗變壓(ya)(ya)器的工(gong)作原(yuan)理圖見圖3，圖中(zhong)高(gao)(gao)(gao)壓(ya)(ya)套管中(zhong)裝有(you)高(gao)(gao)(gao)壓(ya)(ya)硅堆(dui)，串接在高(gao)(gao)(gao)壓(ya)(ya)回路中(zhong)作半波整流(liu)，以獲得直(zhi)流(liu)高(gao)(gao)(gao)電(dian)壓(ya)(ya)。當用(yong)一短路桿將(jiang)高(gao)(gao)(gao)壓(ya)(ya)硅堆(dui)短接時，可獲得工(gong)頻高(gao)(gao)(gao)電(dian)壓(ya)(ya)，作為交流(liu)輸出狀(zhuang)態；取消短路桿時，作為直(zhi)流(liu)輸出狀(zhuang)態。

試驗變壓器高壓套管中的(de)高壓硅堆未(wei)畫(hua)出，其(qi)原理與上圖相(xiang)同(tong)。

三(san)(san)(san)臺(tai)(tai)(tai)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)串級(ji)(ji)(ji)獲得更高(gao)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)接線原理(li)見圖4。串級(ji)(ji)(ji)高(gao)壓(ya)(ya)(ya)(ya)(ya)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)有(you)很大的(de)優(you)越性，因(yin)為整(zheng)個(ge)(ge)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)裝(zhuang)置由幾臺(tai)(tai)(tai)單臺(tai)(tai)(tai)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)組(zu)(zu)成，單臺(tai)(tai)(tai)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)容量小、電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)低、重量輕，便于運輸和(he)(he)安裝(zhuang)。它既然(ran)可(ke)串接成高(gao)出(chu)幾倍的(de)單臺(tai)(tai)(tai)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)輸出(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)組(zu)(zu)合使(shi)用，又(you)可(ke)分(fen)開成幾套(tao)單臺(tai)(tai)(tai)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)單獨使(shi)用。整(zheng)套(tao)裝(zhuang)置投資小，經濟(ji)實惠。圖5中，在**級(ji)(ji)(ji)和(he)(he)**級(ji)(ji)(ji)的(de)每(mei)個(ge)(ge)單元試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)中都(dou)有(you)一個(ge)(ge)勵磁繞(rao)(rao)組(zu)(zu)A1、C1和(he)(he)A2、C2。在三(san)(san)(san)臺(tai)(tai)(tai)串級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)基本原理(li)中，低壓(ya)(ya)(ya)(ya)(ya)電(dian)(dian)(dian)(dian)源(yuan)加在試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅰ的(de)初(chu)(chu)級(ji)(ji)(ji)繞(rao)(rao)組(zu)(zu)a1x1上(shang)(shang)，單臺(tai)(tai)(tai)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅰ、Ⅱ、Ⅲ的(de)輸出(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)都(dou)是(shi)V。勵磁繞(rao)(rao)組(zu)(zu)A1、C1給(gei)**級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅱ的(de)初(chu)(chu)級(ji)(ji)(ji)繞(rao)(rao)組(zu)(zu)供(gong)電(dian)(dian)(dian)(dian)；**級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅱ的(de)勵磁繞(rao)(rao)組(zu)(zu)A2、C2給(gei)第(di)三(san)(san)(san)級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅲ的(de)初(chu)(chu)級(ji)(ji)(ji)繞(rao)(rao)組(zu)(zu)供(gong)電(dian)(dian)(dian)(dian)。**級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅱ和(he)(he)第(di)三(san)(san)(san)級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅲ的(de)箱體(ti)分(fen)別處(chu)在對(dui)地為1V和(he)(he)2V的(de)高(gao)電(dian)(dian)(dian)(dian)位上(shang)(shang)，所以箱體(ti)對(dui)地是(shi)絕(jue)緣的(de)，試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅰ的(de)箱體(ti)是(shi)接地的(de)。這樣**級(ji)(ji)(ji)、**級(ji)(ji)(ji)、第(di)三(san)(san)(san)級(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)(qi)對(dui)地的(de)額定輸出(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)分(fen)別為1V、2V、3V；其(qi)額定容量分(fen)別為3P、2P、1P。

YDQ系列高(gao)壓試驗變壓器做被試品的工頻(pin)耐(nai)壓試驗使用接線原(yuan)理圖(tu)見(jian)圖(tu)5。

圖中(zhong)：R1—限流電阻(zu) FRC—阻(zu)容分(fen)壓(ya)器 RF—球間(jian)隙保護電阻(zu) G—球間(jian)隙 CX—被試品

注(zhu)：高壓尾(wei)必(bi)須可靠接地

工頻耐壓(ya)試驗(yan)(yan)(yan)中限流電阻(zu)(zu)(zu)R1應根據(ju)試驗(yan)(yan)(yan)變壓(ya)器的額定(ding)容量來選擇。如高(gao)(gao)壓(ya)側(ce)額定(ding)輸出電流在100～300mA時(shi)，可(ke)取0.5～1Ω/V(試驗(yan)(yan)(yan)電壓(ya))；高(gao)(gao)壓(ya)側(ce)額定(ding)輸出電流為(wei)1A以上時(shi)，可(ke)取1Ω/V(試驗(yan)(yan)(yan)電壓(ya))。常用水(shui)電阻(zu)(zu)(zu)作為(wei)限流電阻(zu)(zu)(zu)，管子(zi)長度可(ke)按(an)150kV/m考慮，管子(zi)粗細應具有足夠的熱容量(水(shui)阻(zu)(zu)(zu)液配(pei)制(zhi)方法：用蒸(zheng)餾(liu)水(shui)加入適量硫(liu)酸銅配(pei)制(zhi)成(cheng)各種不同(tong)的阻(zu)(zu)(zu)值)。

球間(jian)隙(xi)及保護電(dian)阻：當電(dian)壓超過球間(jian)隙(xi)整(zheng)定值時(一般取試(shi)驗(yan)電(dian)壓的(de)110%~120%)，球間(jian)隙(xi)放電(dian)，對被(bei)試(shi)品起到保護作用(yong)。球間(jian)隙(xi)保護電(dian)阻可按(an)1Ω/V(試(shi)驗(yan)電(dian)壓)選(xuan)取。

在工(gong)(gong)頻耐(nai)壓(ya)(ya)(ya)(ya)(ya)(ya)試(shi)驗(yan)(yan)中，低電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)側測量(liang)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(儀表(biao)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya))不是(shi)非(fei)常(chang)準(zhun)(zhun)確的(de)(de)，其(qi)原因是(shi)由(you)于試(shi)驗(yan)(yan)變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)存(cun)(cun)在著(zhu)漏(lou)抗(kang)，在這個漏(lou)抗(kang)上(shang)必(bi)然存(cun)(cun)在著(zhu)壓(ya)(ya)(ya)(ya)(ya)(ya)降或容(rong)升，使試(shi)品(pin)(pin)上(shang)的(de)(de)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)低于或高于低壓(ya)(ya)(ya)(ya)(ya)(ya)側測量(liang)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)上(shang)反映出(chu)來的(de)(de)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)。工(gong)(gong)頻耐(nai)壓(ya)(ya)(ya)(ya)(ya)(ya)試(shi)驗(yan)(yan)時(shi)，被試(shi)品(pin)(pin)上(shang)的(de)(de)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)高于試(shi)驗(yan)(yan)變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)的(de)(de)輸出(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)，也(ye)就是(shi)所(suo)謂容(rong)升現象。感應耐(nai)壓(ya)(ya)(ya)(ya)(ya)(ya)試(shi)驗(yan)(yan)時(shi)，試(shi)驗(yan)(yan)變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)的(de)(de)漏(lou)抗(kang)必(bi)然存(cun)(cun)在著(zhu)壓(ya)(ya)(ya)(ya)(ya)(ya)降。為了準(zhun)(zhun)確測量(liang)被試(shi)品(pin)(pin)上(shang)所(suo)施加(jia)的(de)(de)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)，因此常(chang)在高壓(ya)(ya)(ya)(ya)(ya)(ya)側接(jie)入FRC阻容(rong)分壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)來測量(liang)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(見圖5)。

工頻耐壓試驗操作注意事項(xiang)

1）試驗人員應做(zuo)好分工，明確(que)相互間聯系方法。并有專門人監護現(xian)場**及觀(guan)察試品(pin)狀態。

2）被試品(pin)應先清(qing)掃(sao)干(gan)(gan)凈，并**干(gan)(gan)燥，以免損壞(huai)被試品(pin)和試驗(yan)帶來的誤差。

3）對于大型(xing)試(shi)驗，一般(ban)都應先進行空(kong)升試(shi)驗。即不接(jie)試(shi)品時(shi)升壓至試(shi)驗電壓，校對各種表(biao)計，調整球間隙(xi)。

4）升壓(ya)速度不能(neng)(neng)太快，并必(bi)須防止突然加壓(ya)。例(li)如調(diao)壓(ya)器(qi)不在零(ling)位時(shi)突然合閘。也不能(neng)(neng)突然切(qie)斷電(dian)源，一般(ban)應在調(diao)壓(ya)器(qi)降至(zhi)零(ling)位時(shi)拉閘。

5）當電壓(ya)升至試驗(yan)(yan)電壓(ya)時，開(kai)始計時，到1min后(hou)，迅速降壓(ya)到1/3試驗(yan)(yan)電壓(ya)以下時，才能拉開(kai)電源。

6）在(zai)升壓(ya)或耐壓(ya)試驗過程中，如發(fa)現下列不正常情況(kuang)時，應立即降壓(ya)，切斷電源。停止試驗并查明原因(yin)：①電壓(ya)表指針擺動很(hen)大(da)；②發(fa)現絕緣燒(shao)焦或冒煙(yan)；③被試品內有不正常的聲音(yin)。

7）耐壓(ya)試驗前后應測量絕(jue)緣(yuan)電阻，檢查絕(jue)緣(yuan)情況(kuang)。

試驗(yan)變壓(ya)(ya)器在做被試品的直流(liu)耐壓(ya)(ya)或泄露試驗(yan)時接線原(yuan)理(li)圖如圖6。

注：此試驗應先抽出(chu)短路桿“D”，圖6中所示(shi)。

圖中：VD—高(gao)壓(ya)硅堆 R1—限流電阻  C1—高(gao)壓(ya)濾(lv)波電容(rong) FRC—阻容(rong)分(fen)壓(ya)器 CX—被試品 μA—帶保(bao)護微安(an)表

泄露(lu)試驗中(zhong)限流(liu)電阻R1選擇在額定輸出電壓(ya)時，輸出端短路電流(liu)不超過(guo)高壓(ya)硅(gui)堆的*大(da)整流(liu)。如電壓(ya)硅(gui)堆的*大(da)整流(liu)電流(liu)為(wei)100mA時用于60kV的試驗裝置中(zhong)，限流(liu)電阻按(an)R1=60/0.1=600kΩ選擇。限流(liu)電阻還應(ying)具有足夠的容量和沿面(mian)放電距離。

高壓濾波電(dian)容C1一般選擇在0.01~0.1μF，當被(bei)試品的電(dian)容量很(hen)大時，C1可省(sheng)略(lve)不用。

泄露試驗的操作及注意事項

1）試(shi)驗前應(ying)先檢查被試(shi)品是(shi)否停電(dian)，接地放電(dian)，一(yi)切對外連線是(shi)否擦(ca)干凈。要嚴防將試(shi)驗電(dian)壓(ya)加(jia)到有人工(gong)作的部位上去。

2）接好試驗裝置的接線后，應(ying)復查無誤后才可加壓。應(ying)特別(bie)注意(yi)檢查高壓設備(bei)及引線與地、與操(cao)作人員的**距離，被試品的外(wai)殼是否可靠接地，要(yao)按(an)**規(gui)程中(zhong)所規(gui)定的內容(rong)進行試驗。

3）對于大電(dian)容量設備應緩慢升(sheng)壓(ya)(ya)，防止被試品的(de)充電(dian)電(dian)流燒壞微安表。必要時應分(fen)(fen)級(ji)加(jia)壓(ya)(ya)，分(fen)(fen)別讀(du)取各級(ji)電(dian)壓(ya)(ya)下(xia)微安表的(de)穩定讀(du)數。

4）試(shi)驗(yan)過程中，應密切監視被試(shi)品、試(shi)驗(yan)裝(zhuang)置、微安表(biao)，一旦(dan)發生擊穿、閃爍等異常(chang)現象應立即降壓，切斷電源(yuan)，并查明(ming)原因，詳(xiang)細(xi)記錄。

5）試(shi)(shi)驗完畢，降(jiang)壓，切斷(duan)電源后應將被(bei)試(shi)(shi)品及試(shi)(shi)驗裝置本身(shen)充分(fen)放(fang)電。

四、WBYD-150KV高壓試驗變壓器注意事項

1、按(an)照您所進行的(de)試(shi)(shi)驗接(jie)好工作線路。試(shi)(shi)驗變壓(ya)(ya)器的(de)外殼(ke)以及操作系(xi)統的(de)外殼(ke)必須可靠接(jie)地。試(shi)(shi)驗變壓(ya)(ya)器高(gao)壓(ya)(ya)繞組(zu)的(de)X端(高(gao)壓(ya)(ya)尾)以及測量繞組(zu)的(de)F端必須可靠接(jie)地。

2、做串(chuan)級(ji)試驗(yan)時(shi)，**級(ji)、第(di)(di)三級(ji)試驗(yan)變(bian)壓(ya)器(qi)的(de)低壓(ya)繞組的(de)X端(duan)，測量繞組的(de)F端(duan)以及高壓(ya)繞組的(de)X端(duan)(高壓(ya)尾(wei))均接本級(ji)試驗(yan)變(bian)壓(ya)器(qi)的(de)外(wai)殼。**級(ji)、第(di)(di)三級(ji)試驗(yan)變(bian)壓(ya)器(qi)的(de)外(wai)殼必須通過絕緣支架接地。

3、接通電(dian)源前，操作(zuo)系統的調(diao)壓器必須調(diao)到零位(wei)后方可接通電(dian)源，合閘(zha)，開始升壓。

4、從(cong)零開始(shi)(shi)均勻旋轉調壓(ya)器手輪升(sheng)(sheng)壓(ya)。升(sheng)(sheng)壓(ya)方(fang)法(fa)有：快速(su)升(sheng)(sheng)壓(ya)法(fa)，即(ji)20s逐級(ji)升(sheng)(sheng)壓(ya)法(fa)；慢速(su)升(sheng)(sheng)壓(ya)法(fa)，即(ji)60s逐級(ji)升(sheng)(sheng)壓(ya)法(fa)；極慢速(su)升(sheng)(sheng)壓(ya)法(fa)供選用。電(dian)壓(ya)從(cong)零開始(shi)(shi)按一定的升(sheng)(sheng)壓(ya)方(fang)式和速(su)度上升(sheng)(sheng)到您(nin)所需的額(e)定試驗(yan)電(dian)壓(ya)的75%后，在以每(mei)秒2%額(e)定試驗(yan)電(dian)壓(ya)的速(su)度升(sheng)(sheng)到您(nin)所需的額(e)定電(dian)壓(ya)，并密(mi)切注意測量(liang)儀表的指示以及被試品(pin)(pin)的情(qing)況。升(sheng)(sheng)壓(ya)過程中或試驗(yan)過程中如發(fa)現(xian)測量(liang)儀表的指示及被試品(pin)(pin)情(qing)況異常，應立即(ji)降壓(ya)，切斷電(dian)源，查明情(qing)況。

5、試驗完畢后(hou)，應(ying)在數秒內勻速的(de)將調壓器返(fan)回至零位，然后(hou)切斷電源。

6、本(ben)產品不得超過額定參數使用。除試(shi)驗必須外，決(jue)不允許全電壓通電或斷電。

7、再升壓(ya)或耐壓(ya)試(shi)(shi)驗過程中(zhong)，如發現以下不(bu)正常情況時，應(ying)立即降壓(ya)，切斷電源，停止(zhi)試(shi)(shi)驗并查明原(yuan)因。

⑴電(dian)壓表指針擺動(或數字跳(tiao)動)很大(da)

⑵電(dian)流表直線上升

被試品(pin)內(nei)有不正常的聲音

8、圖1中第9項系(xi)壓力(li)(li)閥及壓力(li)(li)表，為長期關閉狀態。每6個(ge)月開閥一次(ci)，以檢查SF6壓力(li)(li)，應不(bu)小于(yu)0.2MPa(檢查壓力(li)(li)后(hou)立即關閉閥門)，低于(yu)0.2MPa時應加SF6氣體(ti)，以增加氣絕緣。

9、耐(nai)壓實(shi)驗前后應(ying)測量被試(shi)設(she)備的絕(jue)緣電阻，檢查(cha)絕(jue)緣情況。

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

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

12、運(yun)(yun)輸搬運(yun)(yun)途中不得重(zhong)力沖擊。

13、產(chan)品緊固件及壓(ya)力(li)(li)閥、壓(ya)力(li)(li)表不得(de)擅自松動。

14、使用本產(chan)品做(zuo)高壓試(shi)驗(yan)時，出熟悉本說明(ming)書外，還必須嚴格(ge)執行國(guo)家(jia)有(you)關標準和操作規(gui)(gui)程。可參(can)照GB311-83《高壓輸變設備的絕(jue)緣配(pei)合，高壓試(shi)驗(yan)技術》；《電氣設備預防性試(shi)驗(yan)規(gui)(gui)程》等。

五、WBYD-150KV高壓試驗變壓器容量選擇

標稱試驗變壓器容量Pn的(de)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(yan)變壓(ya)器的額(e)定輸(shu)出高壓(ya)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(ke)取高一些。

Ct——被試品的電容量(pF)

ω——角頻率，ω=2πf， f——試驗電(dian)源的頻率

被試設備的電(dian)容(rong)量Ct可由交流(liu)電(dian)橋測出。Ct的變(bian)化(hua)很(hen)大，

可由設備的類型(xing)而定。

典型數據如下(xia)：

簡(jian)單(dan)的棒式或(huo)懸(xuan)式絕緣(yuan)子   幾(ji)十微法