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產品名稱: 高壓成套試驗變(bian)壓器

產品型號: WBYD-300KVA/100KV

產品展商: 其(qi)它品牌

產品文檔: 無(wu)相關文檔

產品簡介

WBYD-300KVA/100KV高壓成套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。高壓成套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-300KVA/100KV高壓成套試驗變壓器概述(shu)

YDQ系(xi)列(lie)高(gao)(gao)壓(ya)(ya)(ya)(ya)試(shi)驗(yan)變(bian)壓(ya)(ya)(ya)(ya)器(qi)是(shi)(shi)根據《試(shi)驗(yan)變(bian)壓(ya)(ya)(ya)(ya)器(qi)》標(biao)準(zhun)，在(zai)油浸(jin)式(shi)試(shi)驗(yan)變(bian)壓(ya)(ya)(ya)(ya)器(qi)的基礎(chu)上而(er)設計生產(chan)(chan)(chan)的。SF6氣(qi)體具有(you)良好的電(dian)氣(qi)絕緣(yuan)性(xing)能(neng)及優異(yi)的滅弧性(xing)能(neng)，其耐(nai)壓(ya)(ya)(ya)(ya)強(qiang)度(du)為同(tong)一壓(ya)(ya)(ya)(ya)力下氮氣(qi)的2.5倍，擊(ji)穿(chuan)(chuan)電(dian)壓(ya)(ya)(ya)(ya)的空(kong)氣(qi)的2.5倍。在(zai)0.25MPa下與油的擊(ji)穿(chuan)(chuan)電(dian)壓(ya)(ya)(ya)(ya)相(xiang)等(deng)，在(zai)0.45MPa壓(ya)(ya)(ya)(ya)力下是(shi)(shi)油的擊(ji)穿(chuan)(chuan)電(dian)壓(ya)(ya)(ya)(ya)的2倍，是(shi)(shi)一種優于油的新一代超高(gao)(gao)壓(ya)(ya)(ya)(ya)絕緣(yuan)介(jie)質材(cai)料。該(gai)產(chan)(chan)(chan)品技(ji)術要求(qiu)完全(quan)符合(he)《ZBK-41006-89》標(biao)準(zhun)，它(ta)是(shi)(shi)油浸(jin)式(shi)輕(qing)型試(shi)驗(yan)變(bian)壓(ya)(ya)(ya)(ya)器(qi)的換代產(chan)(chan)(chan)品。該(gai)產(chan)(chan)(chan)品具有(you)體積(ji)小(xiao)、重(zhong)量輕(qing)、不受(shou)氣(qi)候(hou)變(bian)化影響(xiang)、電(dian)暈小(xiao)、現場搬運無(wu)需靜止可使(shi)用(yong)，使(shi)用(yong)壽命長(chang)、免(mian)維修(xiu)等(deng)特(te)點。適用(yong)于電(dian)力系(xi)統、工礦企(qi)業(ye)、科研部門等(deng)對(dui)各種高(gao)(gao)壓(ya)(ya)(ya)(ya)電(dian)氣(qi)設備、電(dian)氣(qi)元(yuan)件、絕緣(yuan)材(cai)料進行(xing)工頻或直流(liu)高(gao)(gao)壓(ya)(ya)(ya)(ya)下的絕緣(yuan)強(qiang)度(du)試(shi)驗(yan)。

二、WBYD-300KVA/100KV高壓成套試驗變壓器產品結構

YDQ系列高壓(ya)(ya)試驗變壓(ya)(ya)器采(cai)用單框(kuang)芯(xin)式(shi)(shi)鐵芯(xin)結(jie)構(gou)，初級繞組繞在(zai)鐵芯(xin)上，高壓(ya)(ya)繞組在(zai)外(wai)，這種(zhong)同軸布置減少了(le)漏磁通，因而增大了(le)繞組間(jian)的耦合。產品的外(wai)殼為圓柱灌式(shi)(shi)容器結(jie)構(gou)，能耐(nai)受0.8MPa以上壓(ya)(ya)力。其結(jie)構(gou)見(jian)圖1：

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

三、WBYD-300KVA/100KV高壓成套試驗變壓器工作原理

YDQ系(xi)列(lie)高(gao)壓(ya)(ya)(ya)(ya)(ya)試(shi)驗變(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)為(wei)單相變(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)，聯結組標號(hao)Ⅰ.Ⅰ. 用工頻220V(10kVA以上為(wei)380V)電(dian)(dian)(dian)源(yuan)接入 (為(wei)本公司(si)生產的試(shi)驗變(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)配套專用設備，詳(xiang)細資料請見其具體使用說明書)系(xi)列(lie)操作(zuo)箱(臺)，經(jing)操作(zuo)箱內自偶(ou)調(diao)壓(ya)(ya)(ya)(ya)(ya)器(qi)(50kVA以上調(diao)壓(ya)(ya)(ya)(ya)(ya)器(qi)外附)調(diao)節至(zhi)0～200V(或0～400V)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)輸出至(zhi)YDQ試(shi)驗變(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)的初級繞(rao)組，根(gen)據(ju)電(dian)(dian)(dian)磁感應原理，在試(shi)驗變(bian)壓(ya)(ya)(ya)(ya)(ya)器(qi)高(gao)壓(ya)(ya)(ya)(ya)(ya)繞(rao)組可獲得(de)試(shi)驗所(suo)需的高(gao)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)。

單臺YDQ系列高壓(ya)試驗變壓(ya)器的工作(zuo)原理圖(tu)見(jian)圖(tu)2。

單(dan)臺YDQ系列交直(zhi)流(liu)(liu)高(gao)壓(ya)(ya)試驗變壓(ya)(ya)器的工作原理圖見圖3，圖中(zhong)(zhong)高(gao)壓(ya)(ya)套管中(zhong)(zhong)裝有高(gao)壓(ya)(ya)硅(gui)堆(dui)，串(chuan)接在高(gao)壓(ya)(ya)回路中(zhong)(zhong)作半波整流(liu)(liu)，以(yi)獲得直(zhi)流(liu)(liu)高(gao)電壓(ya)(ya)。當用一短(duan)路桿將高(gao)壓(ya)(ya)硅(gui)堆(dui)短(duan)接時，可獲得工頻高(gao)電壓(ya)(ya)，作為交流(liu)(liu)輸出狀態(tai)；取消短(duan)路桿時，作為直(zhi)流(liu)(liu)輸出狀態(tai)。

試驗(yan)變壓器高(gao)壓套管中的(de)高(gao)壓硅堆未畫出，其原理與上圖(tu)相同(tong)。

三(san)臺(tai)(tai)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)串級(ji)(ji)(ji)(ji)(ji)獲得更高(gao)(gao)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)接(jie)線原(yuan)(yuan)理見(jian)圖4。串級(ji)(ji)(ji)(ji)(ji)高(gao)(gao)壓(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)有很大的(de)(de)優越性，因(yin)為(wei)整個試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)裝(zhuang)置(zhi)由幾(ji)臺(tai)(tai)單(dan)(dan)臺(tai)(tai)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)組(zu)(zu)(zu)成，單(dan)(dan)臺(tai)(tai)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)容(rong)量(liang)小(xiao)、電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)低(di)、重量(liang)輕，便于(yu)運輸和安裝(zhuang)。它既(ji)然可(ke)串接(jie)成高(gao)(gao)出(chu)(chu)幾(ji)倍的(de)(de)單(dan)(dan)臺(tai)(tai)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)輸出(chu)(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)組(zu)(zu)(zu)合使用(yong)，又可(ke)分開成幾(ji)套單(dan)(dan)臺(tai)(tai)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)單(dan)(dan)獨使用(yong)。整套裝(zhuang)置(zhi)投資(zi)小(xiao)，經濟實惠。圖5中(zhong)，在(zai)**級(ji)(ji)(ji)(ji)(ji)和**級(ji)(ji)(ji)(ji)(ji)的(de)(de)每(mei)個單(dan)(dan)元試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)中(zhong)都有一個勵磁繞組(zu)(zu)(zu)A1、C1和A2、C2。在(zai)三(san)臺(tai)(tai)串級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)基本(ben)原(yuan)(yuan)理中(zhong)，低(di)壓(ya)(ya)(ya)(ya)(ya)(ya)電(dian)(dian)(dian)源加在(zai)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅰ的(de)(de)初(chu)級(ji)(ji)(ji)(ji)(ji)繞組(zu)(zu)(zu)a1x1上(shang)，單(dan)(dan)臺(tai)(tai)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅰ、Ⅱ、Ⅲ的(de)(de)輸出(chu)(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)都是V。勵磁繞組(zu)(zu)(zu)A1、C1給(gei)**級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅱ的(de)(de)初(chu)級(ji)(ji)(ji)(ji)(ji)繞組(zu)(zu)(zu)供電(dian)(dian)(dian)；**級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅱ的(de)(de)勵磁繞組(zu)(zu)(zu)A2、C2給(gei)第(di)三(san)級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅲ的(de)(de)初(chu)級(ji)(ji)(ji)(ji)(ji)繞組(zu)(zu)(zu)供電(dian)(dian)(dian)。**級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅱ和第(di)三(san)級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅲ的(de)(de)箱(xiang)體(ti)(ti)分別處在(zai)對(dui)地為(wei)1V和2V的(de)(de)高(gao)(gao)電(dian)(dian)(dian)位上(shang)，所以箱(xiang)體(ti)(ti)對(dui)地是絕緣的(de)(de)，試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)Ⅰ的(de)(de)箱(xiang)體(ti)(ti)是接(jie)地的(de)(de)。這(zhe)樣**級(ji)(ji)(ji)(ji)(ji)、**級(ji)(ji)(ji)(ji)(ji)、第(di)三(san)級(ji)(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)對(dui)地的(de)(de)額(e)(e)定輸出(chu)(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)分別為(wei)1V、2V、3V；其額(e)(e)定容(rong)量(liang)分別為(wei)3P、2P、1P。

YDQ系列(lie)高壓試(shi)驗變壓器做被(bei)試(shi)品的工(gong)頻耐壓試(shi)驗使用接線原(yuan)理圖(tu)見圖(tu)5。

圖中：R1—限(xian)流電阻 FRC—阻容分壓器   RF—球(qiu)間隙保護電阻 G—球(qiu)間隙 CX—被試品

注：高(gao)壓(ya)尾必須可(ke)靠接地

工頻耐(nai)壓試驗(yan)中限流(liu)電(dian)(dian)(dian)阻(zu)(zu)R1應(ying)根據試驗(yan)變壓器的(de)(de)額(e)定(ding)容(rong)量來選(xuan)擇。如高(gao)壓側額(e)定(ding)輸(shu)出電(dian)(dian)(dian)流(liu)在(zai)100～300mA時，可(ke)取(qu)0.5～1Ω/V(試驗(yan)電(dian)(dian)(dian)壓)；高(gao)壓側額(e)定(ding)輸(shu)出電(dian)(dian)(dian)流(liu)為1A以上時，可(ke)取(qu)1Ω/V(試驗(yan)電(dian)(dian)(dian)壓)。常用水電(dian)(dian)(dian)阻(zu)(zu)作為限流(liu)電(dian)(dian)(dian)阻(zu)(zu)，管子長(chang)度(du)可(ke)按(an)150kV/m考慮，管子粗細應(ying)具有足夠的(de)(de)熱(re)容(rong)量(水阻(zu)(zu)液(ye)配制(zhi)方(fang)法(fa)：用蒸餾(liu)水加入適量硫酸銅配制(zhi)成各種不同的(de)(de)阻(zu)(zu)值)。

球間(jian)隙及保護電(dian)(dian)(dian)阻：當電(dian)(dian)(dian)壓(ya)(ya)超過球間(jian)隙整定值時(一般取試驗電(dian)(dian)(dian)壓(ya)(ya)的(de)110%~120%)，球間(jian)隙放電(dian)(dian)(dian)，對被試品起(qi)到保護作(zuo)用。球間(jian)隙保護電(dian)(dian)(dian)阻可(ke)按1Ω/V(試驗電(dian)(dian)(dian)壓(ya)(ya))選取。

在(zai)(zai)工(gong)頻耐壓(ya)試(shi)(shi)(shi)驗(yan)中(zhong)，低(di)電(dian)(dian)(dian)(dian)(dian)壓(ya)側(ce)(ce)測(ce)(ce)量電(dian)(dian)(dian)(dian)(dian)壓(ya)(儀表電(dian)(dian)(dian)(dian)(dian)壓(ya))不是(shi)(shi)(shi)非常(chang)準確(que)的，其(qi)原因是(shi)(shi)(shi)由于(yu)試(shi)(shi)(shi)驗(yan)變(bian)(bian)壓(ya)器(qi)(qi)存在(zai)(zai)著漏(lou)(lou)抗，在(zai)(zai)這個漏(lou)(lou)抗上必(bi)(bi)然存在(zai)(zai)著壓(ya)降或容(rong)升，使試(shi)(shi)(shi)品(pin)上的電(dian)(dian)(dian)(dian)(dian)壓(ya)低(di)于(yu)或高(gao)于(yu)低(di)壓(ya)側(ce)(ce)測(ce)(ce)量電(dian)(dian)(dian)(dian)(dian)壓(ya)表上反(fan)映出來的電(dian)(dian)(dian)(dian)(dian)壓(ya)。工(gong)頻耐壓(ya)試(shi)(shi)(shi)驗(yan)時，被(bei)試(shi)(shi)(shi)品(pin)上的電(dian)(dian)(dian)(dian)(dian)壓(ya)高(gao)于(yu)試(shi)(shi)(shi)驗(yan)變(bian)(bian)壓(ya)器(qi)(qi)的輸出電(dian)(dian)(dian)(dian)(dian)壓(ya)，也就是(shi)(shi)(shi)所謂(wei)容(rong)升現象。感(gan)應(ying)耐壓(ya)試(shi)(shi)(shi)驗(yan)時，試(shi)(shi)(shi)驗(yan)變(bian)(bian)壓(ya)器(qi)(qi)的漏(lou)(lou)抗必(bi)(bi)然存在(zai)(zai)著壓(ya)降。為(wei)了準確(que)測(ce)(ce)量被(bei)試(shi)(shi)(shi)品(pin)上所施(shi)加的電(dian)(dian)(dian)(dian)(dian)壓(ya)，因此常(chang)在(zai)(zai)高(gao)壓(ya)側(ce)(ce)接入FRC阻(zu)容(rong)分壓(ya)器(qi)(qi)來測(ce)(ce)量電(dian)(dian)(dian)(dian)(dian)壓(ya)(見圖5)。

工頻(pin)耐壓(ya)試驗操作注意事(shi)項

1）試(shi)驗人(ren)員應做(zuo)好分工，明確(que)相(xiang)互間聯系方法(fa)。并(bing)有專門人(ren)監護現場**及(ji)觀察試(shi)品狀態(tai)。

2）被試品應先清(qing)掃干凈，并**干燥，以免損壞被試品和試驗(yan)帶來的(de)誤差。

3）對于(yu)大(da)型試(shi)(shi)驗，一般都應先進行空(kong)升試(shi)(shi)驗。即不接試(shi)(shi)品時升壓至試(shi)(shi)驗電(dian)壓，校對各(ge)種表計，調整球間隙。

4）升壓速度(du)不(bu)(bu)能(neng)太快(kuai)，并必須防止突(tu)(tu)然加壓。例如調壓器(qi)不(bu)(bu)在(zai)零位時突(tu)(tu)然合閘。也不(bu)(bu)能(neng)突(tu)(tu)然切斷(duan)電源，一般應在(zai)調壓器(qi)降至零位時拉閘。

5）當電(dian)壓(ya)升至(zhi)試驗電(dian)壓(ya)時，開始計時，到(dao)1min后，迅速降壓(ya)到(dao)1/3試驗電(dian)壓(ya)以下時，才(cai)能拉開電(dian)源。

6）在升壓(ya)或(huo)(huo)耐壓(ya)試驗過程中(zhong)，如發現(xian)下列不正(zheng)常(chang)情況時，應立即降壓(ya)，切斷(duan)電源(yuan)。停止(zhi)試驗并查明原因：①電壓(ya)表(biao)指(zhi)針(zhen)擺動(dong)很大(da)；②發現(xian)絕(jue)緣燒(shao)焦或(huo)(huo)冒煙；③被試品內(nei)有不正(zheng)常(chang)的聲(sheng)音(yin)。

7）耐壓試驗前(qian)后應(ying)測量絕緣(yuan)電阻(zu)，檢查(cha)絕緣(yuan)情(qing)況(kuang)。

試(shi)驗變壓器在做被試(shi)品(pin)的直(zhi)流耐(nai)壓或(huo)泄露試(shi)驗時接線(xian)原理圖如圖6。

注：此試驗應先(xian)抽出短路桿“D”，圖6中所示。

圖(tu)中：VD—高(gao)壓(ya)硅堆(dui)   R1—限流電阻(zu) C1—高(gao)壓(ya)濾波電容(rong) FRC—阻(zu)容(rong)分壓(ya)器 CX—被試品 μA—帶保護微(wei)安表

泄露試(shi)驗(yan)中限(xian)流(liu)電(dian)(dian)(dian)阻R1選擇在額定輸出電(dian)(dian)(dian)壓時，輸出端短(duan)路電(dian)(dian)(dian)流(liu)不(bu)超過(guo)高壓硅堆的(de)(de)*大(da)整流(liu)。如電(dian)(dian)(dian)壓硅堆的(de)(de)*大(da)整流(liu)電(dian)(dian)(dian)流(liu)為(wei)100mA時用于(yu)60kV的(de)(de)試(shi)驗(yan)裝(zhuang)置中，限(xian)流(liu)電(dian)(dian)(dian)阻按R1=60/0.1=600kΩ選擇。限(xian)流(liu)電(dian)(dian)(dian)阻還(huan)應具有足夠的(de)(de)容量和沿面放電(dian)(dian)(dian)距離。

高壓(ya)濾波電容C1一般選擇在0.01~0.1μF，當被試(shi)品的電容量很(hen)大時，C1可省略不(bu)用。

泄露試驗的操作及(ji)注意事(shi)項

1）試驗(yan)前應先檢查(cha)被試品(pin)是否停電，接地放(fang)電，一切(qie)對(dui)外連線是否擦干凈(jing)。要嚴防將試驗(yan)電壓加到有人工作的(de)部位上去。

2）接好試驗裝(zhuang)置的(de)(de)(de)(de)接線后，應復查無誤后才(cai)可(ke)加壓。應特別(bie)注意(yi)檢查高壓設備及引線與(yu)地、與(yu)操作人(ren)員的(de)(de)(de)(de)**距離，被試品的(de)(de)(de)(de)外殼是否可(ke)靠接地，要(yao)按**規程中所規定(ding)的(de)(de)(de)(de)內容進行試驗。

3）對(dui)于大電容(rong)量設(she)備應(ying)緩慢升壓，防止被試品的充電電流燒壞微安表。必(bi)要時應(ying)分級加壓，分別讀(du)取各(ge)級電壓下微安表的穩定讀(du)數。

4）試驗過程中，應密切監視被(bei)試品(pin)、試驗裝置、微安表，一旦發生擊穿、閃爍等異常現象應立即降壓，切斷電源，并查明原(yuan)因，詳細記錄(lu)。

5）試驗完畢，降壓，切(qie)斷(duan)電(dian)源(yuan)后(hou)應將被(bei)試品及試驗裝置本身充(chong)分(fen)放電(dian)。

四、WBYD-300KVA/100KV高壓成套試驗變壓器注意事項

1、按照您所進行的(de)(de)試驗(yan)(yan)接(jie)(jie)好工作線路(lu)。試驗(yan)(yan)變壓(ya)(ya)器的(de)(de)外殼以及操(cao)作系統的(de)(de)外殼必(bi)須(xu)可靠(kao)(kao)接(jie)(jie)地(di)(di)。試驗(yan)(yan)變壓(ya)(ya)器高壓(ya)(ya)繞組(zu)的(de)(de)X端(高壓(ya)(ya)尾(wei))以及測量繞組(zu)的(de)(de)F端必(bi)須(xu)可靠(kao)(kao)接(jie)(jie)地(di)(di)。

2、做串級(ji)試(shi)驗時，**級(ji)、第三(san)級(ji)試(shi)驗變(bian)壓(ya)(ya)(ya)器(qi)的低壓(ya)(ya)(ya)繞組(zu)(zu)的X端(duan)，測量繞組(zu)(zu)的F端(duan)以及高壓(ya)(ya)(ya)繞組(zu)(zu)的X端(duan)(高壓(ya)(ya)(ya)尾)均接本級(ji)試(shi)驗變(bian)壓(ya)(ya)(ya)器(qi)的外(wai)殼(ke)。**級(ji)、第三(san)級(ji)試(shi)驗變(bian)壓(ya)(ya)(ya)器(qi)的外(wai)殼(ke)必須通過絕(jue)緣支架(jia)接地。

3、接通(tong)電源(yuan)前，操作系統的調壓器必須(xu)調到零位后方可接通(tong)電源(yuan)，合閘，開始(shi)升壓。

4、從零開始(shi)(shi)均勻旋轉調壓(ya)(ya)(ya)(ya)器手輪升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)。升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)方法有：快速(su)升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)法，即(ji)(ji)20s逐級(ji)升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)法；慢速(su)升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)法，即(ji)(ji)60s逐級(ji)升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)法；極慢速(su)升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)法供選用。電(dian)壓(ya)(ya)(ya)(ya)從零開始(shi)(shi)按一定的(de)升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)方式(shi)和速(su)度上升(sheng)(sheng)(sheng)到您(nin)所需(xu)的(de)額(e)定試(shi)驗(yan)電(dian)壓(ya)(ya)(ya)(ya)的(de)75%后，在以(yi)(yi)每秒2%額(e)定試(shi)驗(yan)電(dian)壓(ya)(ya)(ya)(ya)的(de)速(su)度升(sheng)(sheng)(sheng)到您(nin)所需(xu)的(de)額(e)定電(dian)壓(ya)(ya)(ya)(ya)，并密切(qie)注意測(ce)量儀(yi)(yi)表的(de)指示(shi)以(yi)(yi)及(ji)被試(shi)品(pin)的(de)情況(kuang)(kuang)。升(sheng)(sheng)(sheng)壓(ya)(ya)(ya)(ya)過程中(zhong)或試(shi)驗(yan)過程中(zhong)如(ru)發現測(ce)量儀(yi)(yi)表的(de)指示(shi)及(ji)被試(shi)品(pin)情況(kuang)(kuang)異(yi)常，應立即(ji)(ji)降壓(ya)(ya)(ya)(ya)，切(qie)斷電(dian)源，查明(ming)情況(kuang)(kuang)。

5、試(shi)驗完(wan)畢后，應(ying)在數(shu)秒內勻速的(de)將調壓(ya)器返(fan)回(hui)至零位，然后切(qie)斷電(dian)源。

6、本產品不(bu)得超過額定參數使(shi)用。除試驗必須外，決不(bu)允許全電(dian)壓通電(dian)或斷電(dian)。

7、再(zai)升壓(ya)或耐壓(ya)試(shi)驗過程中，如(ru)發現以(yi)下不正(zheng)常情況時，應立即降壓(ya)，切(qie)斷電(dian)源，停止(zhi)試(shi)驗并查明(ming)原因。

⑴電壓表(biao)指針(zhen)擺動(或(huo)數字跳(tiao)動)很大

⑵電流表直線上升(sheng)

被試品內有不正常的聲音

8、圖(tu)1中第(di)9項系壓力(li)閥(fa)(fa)及壓力(li)表，為長期關(guan)閉狀態(tai)。每6個月開閥(fa)(fa)一次，以檢查SF6壓力(li)，應不小(xiao)于0.2MPa(檢查壓力(li)后立即關(guan)閉閥(fa)(fa)門)，低(di)于0.2MPa時應加SF6氣體，以增加氣絕緣。

9、耐壓(ya)實驗(yan)前后應測量被試設備的絕(jue)緣(yuan)電(dian)阻，檢(jian)查絕(jue)緣(yuan)情況。

10、當試驗變壓器長期不使(shi)用時，應放置于(yu)通風(feng)、干燥、無陽光(guang)直射的(de)地方。

11、該(gai)產品(pin)不允許在(zai)高于45℃的溫度下長期存放、使用、放氣。

12、運輸搬(ban)運途(tu)中不(bu)得重力沖擊。

13、產品緊固件及壓力閥(fa)、壓力表不得擅(shan)自松(song)動。

14、使用本產品做高壓試(shi)驗時(shi)，出(chu)熟(shu)悉本說明書外，還必須嚴格執行國家有(you)關標準和操作規程(cheng)。可參照GB311-83《高壓輸(shu)變設備(bei)的(de)絕緣配(pei)合，高壓試(shi)驗技術(shu)》；《電(dian)氣設備(bei)預防性試(shi)驗規程(cheng)》等。

五、WBYD-300KVA/100KV高壓成套試驗變壓器容量選擇

標稱試驗變(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(bian)壓器容量(kVA)

Vn——試驗變壓器的額定輸出(chu)高壓的有效值(kV)

k ——**系(xi)數。k≥1，標稱(cheng)電壓(ya)Vn≥1MV時(shi)，k=2；標稱(cheng)電壓(ya)較低時(shi)，k值可(ke)取高(gao)一(yi)些。

Ct——被試品的(de)電(dian)容(rong)量(pF)

ω——角(jiao)頻率，ω=2πf， f——試驗電源的頻率

被試設備的電容量Ct可由(you)交流電橋測出。Ct的變化很大(da)，

可由設(she)備的類型而定。

典(dian)型(xing)數據如下：

簡單的棒式或懸(xuan)式絕緣子幾十微法