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交流耐壓機

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產品名稱: 交流(liu)耐壓機

產品型號: WBYD-350KV

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WBYD-350KV交流耐壓機具有體積小、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。交流耐壓機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-350KV交流耐壓機概述

YDQ系列(lie)高壓(ya)(ya)試(shi)(shi)(shi)驗(yan)(yan)變(bian)壓(ya)(ya)器(qi)(qi)是根據(ju)《試(shi)(shi)(shi)驗(yan)(yan)變(bian)壓(ya)(ya)器(qi)(qi)》標準，在(zai)(zai)油(you)浸式試(shi)(shi)(shi)驗(yan)(yan)變(bian)壓(ya)(ya)器(qi)(qi)的(de)(de)基礎上而(er)設計生產(chan)的(de)(de)。SF6氣(qi)(qi)體(ti)具有(you)良(liang)好(hao)的(de)(de)電(dian)(dian)(dian)氣(qi)(qi)絕(jue)緣(yuan)性能及優(you)異的(de)(de)滅弧性能，其(qi)耐(nai)壓(ya)(ya)強(qiang)度為同(tong)一(yi)壓(ya)(ya)力下氮氣(qi)(qi)的(de)(de)2.5倍，擊(ji)穿(chuan)電(dian)(dian)(dian)壓(ya)(ya)的(de)(de)空氣(qi)(qi)的(de)(de)2.5倍。在(zai)(zai)0.25MPa下與油(you)的(de)(de)擊(ji)穿(chuan)電(dian)(dian)(dian)壓(ya)(ya)相(xiang)等(deng)，在(zai)(zai)0.45MPa壓(ya)(ya)力下是油(you)的(de)(de)擊(ji)穿(chuan)電(dian)(dian)(dian)壓(ya)(ya)的(de)(de)2倍，是一(yi)種(zhong)優(you)于油(you)的(de)(de)新一(yi)代超高壓(ya)(ya)絕(jue)緣(yuan)介質材料(liao)。該產(chan)品技術要(yao)求完(wan)全符合《ZBK-41006-89》標準，它(ta)是油(you)浸式輕型試(shi)(shi)(shi)驗(yan)(yan)變(bian)壓(ya)(ya)器(qi)(qi)的(de)(de)換(huan)代產(chan)品。該產(chan)品具有(you)體(ti)積小(xiao)、重量輕、不受氣(qi)(qi)候變(bian)化影響、電(dian)(dian)(dian)暈小(xiao)、現場搬運無需(xu)靜止可使(shi)用，使(shi)用壽命長(chang)、免維修等(deng)特點。適用于電(dian)(dian)(dian)力系統、工礦企(qi)業、科研部門等(deng)對各種(zhong)高壓(ya)(ya)電(dian)(dian)(dian)氣(qi)(qi)設備、電(dian)(dian)(dian)氣(qi)(qi)元件、絕(jue)緣(yuan)材料(liao)進(jin)行工頻(pin)或直流(liu)高壓(ya)(ya)下的(de)(de)絕(jue)緣(yuan)強(qiang)度試(shi)(shi)(shi)驗(yan)(yan)。

二、WBYD-350KV交流耐壓機產品結構

YDQ系列高壓(ya)試驗變壓(ya)器采用單框芯(xin)式(shi)鐵芯(xin)結構(gou)，初級繞組(zu)繞在鐵芯(xin)上，高壓(ya)繞組(zu)在外，這種同軸布(bu)置減少了漏磁通，因而(er)增大了繞組(zu)間的耦(ou)合。產品的外殼(ke)為圓柱灌式(shi)容器結構(gou)，能(neng)耐受0.8MPa以上壓(ya)力。其結構(gou)見圖(tu)1：

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

三、WBYD-350KV交流耐壓機工作原理

YDQ系列高壓(ya)(ya)(ya)試驗(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)器為(wei)單相變(bian)(bian)壓(ya)(ya)(ya)器，聯結(jie)組(zu)標號Ⅰ.Ⅰ. 用工(gong)頻220V(10kVA以(yi)(yi)上(shang)(shang)為(wei)380V)電源(yuan)接入 (為(wei)本公司(si)生產(chan)的試驗(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)器配套專(zhuan)用設備，詳細資料請見其具(ju)體使用說明書)系列操作箱(xiang)(臺)，經操作箱(xiang)內自(zi)偶調壓(ya)(ya)(ya)器(50kVA以(yi)(yi)上(shang)(shang)調壓(ya)(ya)(ya)器外(wai)附(fu))調節至(zhi)0～200V(或0～400V)電壓(ya)(ya)(ya)輸出至(zhi)YDQ試驗(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)器的初(chu)級繞組(zu)，根據電磁感應原理，在試驗(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)器高壓(ya)(ya)(ya)繞組(zu)可獲得(de)試驗(yan)(yan)所需(xu)的高電壓(ya)(ya)(ya)。

單臺YDQ系列(lie)高(gao)壓試(shi)驗變壓器的工(gong)作原理圖見圖2。

單臺YDQ系列(lie)交直流(liu)高(gao)(gao)壓(ya)(ya)試驗變壓(ya)(ya)器的工(gong)(gong)作(zuo)原理圖見圖3，圖中高(gao)(gao)壓(ya)(ya)套管中裝有(you)高(gao)(gao)壓(ya)(ya)硅堆(dui)，串接在高(gao)(gao)壓(ya)(ya)回路(lu)(lu)中作(zuo)半波整流(liu)，以獲得直流(liu)高(gao)(gao)電(dian)壓(ya)(ya)。當(dang)用一短(duan)(duan)路(lu)(lu)桿將(jiang)高(gao)(gao)壓(ya)(ya)硅堆(dui)短(duan)(duan)接時，可獲得工(gong)(gong)頻(pin)高(gao)(gao)電(dian)壓(ya)(ya)，作(zuo)為交流(liu)輸出狀態(tai)；取消短(duan)(duan)路(lu)(lu)桿時，作(zuo)為直流(liu)輸出狀態(tai)。

試驗變壓器高壓套管中的高壓硅堆未畫出，其原理與上圖相(xiang)同。

三(san)臺(tai)(tai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)串(chuan)級(ji)(ji)(ji)(ji)獲得更高(gao)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)接線原理(li)見圖4。串(chuan)級(ji)(ji)(ji)(ji)高(gao)壓(ya)(ya)(ya)(ya)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)有(you)很大的(de)(de)(de)(de)優越性，因為整個(ge)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)裝置由幾臺(tai)(tai)單(dan)臺(tai)(tai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)組(zu)(zu)(zu)成，單(dan)臺(tai)(tai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)容量(liang)(liang)小(xiao)、電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)低、重量(liang)(liang)輕，便于運輸(shu)和(he)(he)(he)(he)安裝。它既然可串(chuan)接成高(gao)出(chu)(chu)幾倍的(de)(de)(de)(de)單(dan)臺(tai)(tai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)輸(shu)出(chu)(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)組(zu)(zu)(zu)合(he)使用，又可分開成幾套單(dan)臺(tai)(tai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)單(dan)獨使用。整套裝置投資小(xiao)，經濟實惠。圖5中(zhong)，在(zai)**級(ji)(ji)(ji)(ji)和(he)(he)(he)(he)**級(ji)(ji)(ji)(ji)的(de)(de)(de)(de)每個(ge)單(dan)元試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)中(zhong)都(dou)有(you)一個(ge)勵(li)磁繞(rao)(rao)組(zu)(zu)(zu)A1、C1和(he)(he)(he)(he)A2、C2。在(zai)三(san)臺(tai)(tai)串(chuan)級(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)基(ji)本原理(li)中(zhong)，低壓(ya)(ya)(ya)(ya)電(dian)(dian)(dian)源(yuan)加在(zai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)Ⅰ的(de)(de)(de)(de)初(chu)級(ji)(ji)(ji)(ji)繞(rao)(rao)組(zu)(zu)(zu)a1x1上，單(dan)臺(tai)(tai)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)Ⅰ、Ⅱ、Ⅲ的(de)(de)(de)(de)輸(shu)出(chu)(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)都(dou)是(shi)V。勵(li)磁繞(rao)(rao)組(zu)(zu)(zu)A1、C1給(gei)**級(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)Ⅱ的(de)(de)(de)(de)初(chu)級(ji)(ji)(ji)(ji)繞(rao)(rao)組(zu)(zu)(zu)供電(dian)(dian)(dian)；**級(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)Ⅱ的(de)(de)(de)(de)勵(li)磁繞(rao)(rao)組(zu)(zu)(zu)A2、C2給(gei)第三(san)級(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)Ⅲ的(de)(de)(de)(de)初(chu)級(ji)(ji)(ji)(ji)繞(rao)(rao)組(zu)(zu)(zu)供電(dian)(dian)(dian)。**級(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)Ⅱ和(he)(he)(he)(he)第三(san)級(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)Ⅲ的(de)(de)(de)(de)箱(xiang)體(ti)分別(bie)(bie)處在(zai)對(dui)地為1V和(he)(he)(he)(he)2V的(de)(de)(de)(de)高(gao)電(dian)(dian)(dian)位上，所以箱(xiang)體(ti)對(dui)地是(shi)絕緣(yuan)的(de)(de)(de)(de)，試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)Ⅰ的(de)(de)(de)(de)箱(xiang)體(ti)是(shi)接地的(de)(de)(de)(de)。這(zhe)樣**級(ji)(ji)(ji)(ji)、**級(ji)(ji)(ji)(ji)、第三(san)級(ji)(ji)(ji)(ji)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)對(dui)地的(de)(de)(de)(de)額定(ding)輸(shu)出(chu)(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)分別(bie)(bie)為1V、2V、3V；其額定(ding)容量(liang)(liang)分別(bie)(bie)為3P、2P、1P。

YDQ系(xi)列高壓試(shi)驗變壓器做(zuo)被(bei)試(shi)品的工頻(pin)耐壓試(shi)驗使(shi)用接線(xian)原理圖見圖5。

圖(tu)中(zhong)：R1—限(xian)流電阻 FRC—阻容(rong)分(fen)壓器 RF—球間(jian)隙(xi)保護電阻 G—球間(jian)隙(xi) ; CX—被試品

注：高壓尾必須可靠接地

工頻耐(nai)壓(ya)(ya)試(shi)驗中限流(liu)(liu)電(dian)(dian)(dian)阻R1應(ying)根據試(shi)驗變壓(ya)(ya)器的額定容量(liang)來選擇。如高壓(ya)(ya)側額定輸(shu)出(chu)電(dian)(dian)(dian)流(liu)(liu)在100～300mA時，可取(qu)0.5～1Ω/V(試(shi)驗電(dian)(dian)(dian)壓(ya)(ya))；高壓(ya)(ya)側額定輸(shu)出(chu)電(dian)(dian)(dian)流(liu)(liu)為(wei)1A以上時，可取(qu)1Ω/V(試(shi)驗電(dian)(dian)(dian)壓(ya)(ya))。常用水電(dian)(dian)(dian)阻作(zuo)為(wei)限流(liu)(liu)電(dian)(dian)(dian)阻，管子長(chang)度可按150kV/m考慮，管子粗細應(ying)具有(you)足夠的熱容量(liang)(水阻液(ye)配(pei)制方法：用蒸(zheng)餾(liu)水加(jia)入(ru)適量(liang)硫(liu)酸(suan)銅(tong)配(pei)制成(cheng)各(ge)種不同的阻值(zhi))。

球(qiu)間(jian)(jian)隙(xi)及保(bao)護電(dian)(dian)(dian)阻：當電(dian)(dian)(dian)壓超過球(qiu)間(jian)(jian)隙(xi)整定(ding)值時(一般取試驗(yan)電(dian)(dian)(dian)壓的(de)110%~120%)，球(qiu)間(jian)(jian)隙(xi)放電(dian)(dian)(dian)，對(dui)被試品起到保(bao)護作用。球(qiu)間(jian)(jian)隙(xi)保(bao)護電(dian)(dian)(dian)阻可按1Ω/V(試驗(yan)電(dian)(dian)(dian)壓)選(xuan)取。

在(zai)(zai)工頻耐(nai)(nai)壓(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)(shi)驗(yan)中，低電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)側測量電(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)(chang)準確的(de)，其原因是(shi)由于(yu)試(shi)(shi)(shi)驗(yan)變壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)存在(zai)(zai)著(zhu)漏抗，在(zai)(zai)這個漏抗上(shang)(shang)必(bi)然(ran)存在(zai)(zai)著(zhu)壓(ya)(ya)(ya)(ya)(ya)(ya)降或(huo)容升，使試(shi)(shi)(shi)品上(shang)(shang)的(de)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)低于(yu)或(huo)高(gao)(gao)于(yu)低壓(ya)(ya)(ya)(ya)(ya)(ya)側測量電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)表(biao)上(shang)(shang)反映出(chu)來(lai)(lai)的(de)電(dian)(dian)(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(yan)時(shi)(shi)，被(bei)試(shi)(shi)(shi)品上(shang)(shang)的(de)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)高(gao)(gao)于(yu)試(shi)(shi)(shi)驗(yan)變壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)的(de)輸(shu)出(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)，也就是(shi)所謂容升現象。感應耐(nai)(nai)壓(ya)(ya)(ya)(ya)(ya)(ya)試(shi)(shi)(shi)驗(yan)時(shi)(shi)，試(shi)(shi)(shi)驗(yan)變壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)的(de)漏抗必(bi)然(ran)存在(zai)(zai)著(zhu)壓(ya)(ya)(ya)(ya)(ya)(ya)降。為了準確測量被(bei)試(shi)(shi)(shi)品上(shang)(shang)所施(shi)加的(de)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)，因此常(chang)(chang)在(zai)(zai)高(gao)(gao)壓(ya)(ya)(ya)(ya)(ya)(ya)側接(jie)入FRC阻(zu)容分壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)來(lai)(lai)測量電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(見圖5)。

工頻(pin)耐壓試驗操作(zuo)注意(yi)事項

1）試驗人員應(ying)做好(hao)分工(gong)，明確相互(hu)間聯(lian)系方法。并有專(zhuan)門人監護現場(chang)**及觀(guan)察試品狀態。

2）被試品(pin)應(ying)先(xian)清掃干(gan)凈，并**干(gan)燥，以免損壞被試品(pin)和試驗帶來的(de)誤差。

3）對于大型(xing)試(shi)驗(yan)，一般(ban)都(dou)應先進行空(kong)升試(shi)驗(yan)。即不接試(shi)品時升壓(ya)至試(shi)驗(yan)電壓(ya)，校對各種表計(ji)，調整(zheng)球(qiu)間隙(xi)。

4）升壓速度不(bu)能太快，并必須(xu)防(fang)止突(tu)然(ran)加(jia)壓。例如調壓器不(bu)在(zai)零(ling)位時突(tu)然(ran)合(he)閘。也不(bu)能突(tu)然(ran)切斷電源，一般應在(zai)調壓器降至零(ling)位時拉閘。

5）當電(dian)(dian)壓升至試驗(yan)電(dian)(dian)壓時(shi)，開始(shi)計時(shi)，到(dao)1min后，迅速降(jiang)壓到(dao)1/3試驗(yan)電(dian)(dian)壓以(yi)下時(shi)，才能拉開電(dian)(dian)源。

6）在升壓(ya)(ya)或耐壓(ya)(ya)試(shi)驗(yan)過(guo)程中(zhong)，如發現(xian)下列不(bu)正(zheng)常情況時，應立即降壓(ya)(ya)，切斷電源。停(ting)止試(shi)驗(yan)并查(cha)明原因：①電壓(ya)(ya)表指針擺動很大(da)；②發現(xian)絕緣燒焦或冒煙；③被試(shi)品內有不(bu)正(zheng)常的(de)聲音(yin)。

7）耐(nai)壓試驗前后應測量絕(jue)緣電阻，檢查絕(jue)緣情況。

試驗變壓器在做被試品的直流耐(nai)壓或泄露試驗時(shi)接(jie)線原理(li)圖如圖6。

注：此試(shi)驗應先(xian)抽(chou)出短(duan)路桿“D”，圖6中所示。

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

泄(xie)露試驗中限流電(dian)(dian)(dian)(dian)阻R1選(xuan)擇在額(e)定輸出(chu)電(dian)(dian)(dian)(dian)壓(ya)時，輸出(chu)端短路電(dian)(dian)(dian)(dian)流不超過高壓(ya)硅堆的(de)*大整流。如電(dian)(dian)(dian)(dian)壓(ya)硅堆的(de)*大整流電(dian)(dian)(dian)(dian)流為(wei)100mA時用于60kV的(de)試驗裝置中，限流電(dian)(dian)(dian)(dian)阻按R1=60/0.1=600kΩ選(xuan)擇。限流電(dian)(dian)(dian)(dian)阻還應具有足夠的(de)容量和沿面放電(dian)(dian)(dian)(dian)距離(li)。

高壓濾波電容C1一般(ban)選擇在0.01~0.1μF，當被試品(pin)的電容量(liang)很大時(shi)，C1可省略(lve)不用。

泄(xie)露試驗的(de)操作及注(zhu)意事(shi)項

1）試驗前應(ying)先檢查(cha)被試品是(shi)否停電(dian)，接地放電(dian)，一(yi)切對(dui)外(wai)連線是(shi)否擦干凈。要嚴防將試驗電(dian)壓加到有人工作的部位上去。

2）接好試(shi)(shi)驗(yan)裝置(zhi)的接線后，應(ying)復查無誤后才可加壓。應(ying)特別注(zhu)意檢查高壓設(she)備及引線與(yu)地(di)(di)、與(yu)操作人員的**距(ju)離(li)，被試(shi)(shi)品的外殼是否可靠接地(di)(di)，要按(an)**規程中所規定(ding)的內(nei)容(rong)進行試(shi)(shi)驗(yan)。

3）對于(yu)大電容量(liang)設備應緩慢升壓，防(fang)止被試品的(de)充(chong)電電流燒(shao)壞微安表。必要時應分(fen)級加壓，分(fen)別(bie)讀取各(ge)級電壓下微安表的(de)穩(wen)定讀數。

4）試(shi)驗過程中，應密切監視(shi)被試(shi)品、試(shi)驗裝置、微(wei)安表，一旦發(fa)生擊穿、閃爍等異常現(xian)象應立即(ji)降壓(ya)，切斷電源，并查明(ming)原因，詳細記錄(lu)。

5）試(shi)驗完畢(bi)，降壓，切斷電源后應(ying)將被試(shi)品及試(shi)驗裝(zhuang)置本(ben)身充分放(fang)電。

四、WBYD-350KV交流耐壓機注意事項

1、按照您所進行的(de)試驗(yan)接(jie)好工作(zuo)線路。試驗(yan)變(bian)壓(ya)器的(de)外(wai)殼以(yi)及操作(zuo)系(xi)統的(de)外(wai)殼必須可靠接(jie)地(di)。試驗(yan)變(bian)壓(ya)器高壓(ya)繞組(zu)的(de)X端(duan)(高壓(ya)尾)以(yi)及測(ce)量繞組(zu)的(de)F端(duan)必須可靠接(jie)地(di)。

2、做串級(ji)(ji)試驗時，**級(ji)(ji)、第三級(ji)(ji)試驗變壓(ya)器(qi)的低壓(ya)繞(rao)組(zu)的X端，測量繞(rao)組(zu)的F端以(yi)及高(gao)壓(ya)繞(rao)組(zu)的X端(高(gao)壓(ya)尾)均(jun)接(jie)本級(ji)(ji)試驗變壓(ya)器(qi)的外(wai)殼。**級(ji)(ji)、第三級(ji)(ji)試驗變壓(ya)器(qi)的外(wai)殼必須通過絕緣支架接(jie)地(di)。

3、接通(tong)電源前，操作系統的(de)調壓器必(bi)須調到零位后方可接通(tong)電源，合閘，開始升壓。

4、從零開始(shi)均勻旋(xuan)轉調(diao)壓(ya)(ya)器手輪升(sheng)(sheng)(sheng)壓(ya)(ya)。升(sheng)(sheng)(sheng)壓(ya)(ya)方(fang)法有：快速(su)升(sheng)(sheng)(sheng)壓(ya)(ya)法，即(ji)20s逐級升(sheng)(sheng)(sheng)壓(ya)(ya)法；慢速(su)升(sheng)(sheng)(sheng)壓(ya)(ya)法，即(ji)60s逐級升(sheng)(sheng)(sheng)壓(ya)(ya)法；極慢速(su)升(sheng)(sheng)(sheng)壓(ya)(ya)法供選(xuan)用。電(dian)壓(ya)(ya)從零開始(shi)按一定的(de)升(sheng)(sheng)(sheng)壓(ya)(ya)方(fang)式和(he)速(su)度(du)(du)上(shang)升(sheng)(sheng)(sheng)到您(nin)所需的(de)額定試(shi)(shi)驗(yan)電(dian)壓(ya)(ya)的(de)75%后，在以每秒2%額定試(shi)(shi)驗(yan)電(dian)壓(ya)(ya)的(de)速(su)度(du)(du)升(sheng)(sheng)(sheng)到您(nin)所需的(de)額定電(dian)壓(ya)(ya)，并密切(qie)注意測量儀表(biao)的(de)指示以及被試(shi)(shi)品的(de)情況(kuang)。升(sheng)(sheng)(sheng)壓(ya)(ya)過(guo)程中或試(shi)(shi)驗(yan)過(guo)程中如發現測量儀表(biao)的(de)指示及被試(shi)(shi)品情況(kuang)異(yi)常，應(ying)立即(ji)降壓(ya)(ya)，切(qie)斷電(dian)源，查明情況(kuang)。

5、試驗完畢后，應在數秒(miao)內勻速的(de)將調(diao)壓(ya)器返(fan)回(hui)至零位(wei)，然后切斷(duan)電源。

6、本(ben)產品不(bu)得超(chao)過額定參數使用。除試驗必須外(wai)，決不(bu)允(yun)許(xu)全電壓通電或斷(duan)電。

7、再升壓(ya)或耐壓(ya)試驗(yan)過程中(zhong)，如發現以下(xia)不正常(chang)情況時，應(ying)立即降(jiang)壓(ya)，切斷電(dian)源，停止試驗(yan)并查(cha)明原因。

⑴電壓表指針擺(bai)動(dong)(或數字(zi)跳動(dong))很大

⑵電流(liu)表(biao)直線上升

被試品內有不(bu)正常的聲(sheng)音(yin)

8、圖(tu)1中第(di)9項系壓力閥及壓力表，為(wei)長(chang)期關(guan)閉(bi)(bi)狀態。每6個(ge)月開閥一(yi)次，以檢查SF6壓力，應不小(xiao)于(yu)0.2MPa(檢查壓力后立即關(guan)閉(bi)(bi)閥門)，低(di)于(yu)0.2MPa時應加(jia)SF6氣(qi)體，以增(zeng)加(jia)氣(qi)絕緣(yuan)。

9、耐壓(ya)實(shi)驗前后應(ying)測量(liang)被(bei)試設備的絕緣電阻，檢查絕緣情況。

10、當試(shi)驗變壓器長期(qi)不使用時(shi)，應(ying)放置(zhi)于通風(feng)、干燥、無陽(yang)光直(zhi)射的地方。

11、該產品不允許在(zai)高于45℃的(de)溫度下長期(qi)存放、使用、放氣。

12、運輸搬運途中(zhong)不(bu)得重力沖(chong)擊。

13、產品緊固件及壓力(li)閥、壓力(li)表不(bu)得(de)擅自松(song)動(dong)。

14、使用本產品做高壓(ya)試(shi)(shi)(shi)驗時，出熟悉(xi)本說明(ming)書外，還必須嚴格執行國家有關標準和操作規(gui)程。可(ke)參照GB311-83《高壓(ya)輸變設備的絕(jue)緣配合，高壓(ya)試(shi)(shi)(shi)驗技術》；《電氣設備預防性(xing)試(shi)(shi)(shi)驗規(gui)程》等。

五、WBYD-350KV交流耐壓機容量選擇

標稱試驗變壓器容量Pn的確定公式：Pn=kVn 2ωCt×10-9

式(shi)中：

Pn——標(biao)稱試(shi)驗變壓器容量(kVA)

Vn——試驗變壓(ya)器的額定輸出高壓(ya)的有效值(kV)

k ——**系數。k≥1，標(biao)稱電(dian)(dian)壓Vn≥1MV時，k=2；標(biao)稱電(dian)(dian)壓較低時，k值可取高(gao)一些。

Ct——被試品的電容量(pF)

ω——角頻(pin)率(lv)，ω=2πf， f——試驗(yan)電源的頻(pin)率(lv)

被試(shi)設備的(de)電容(rong)量Ct可由交(jiao)流電橋(qiao)測(ce)出(chu)。Ct的(de)變化很(hen)大(da)，

可由設備(bei)的類型而定(ding)。

典型數據如下：

簡單的(de)棒式(shi)(shi)或懸式(shi)(shi)絕緣子幾十微法