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TFD-18發(fa)(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)定(ding)子(zi)端部(bu)絕緣(yuan)測(ce)試(shi)(shi)儀(yi)電(dian)(dian)(dian)位(wei)(wei)差(cha)計,發(fa)(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)電(dian)(dian)(dian)位(wei)(wei)差(cha)計,發(fa)(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)表(biao)(biao)面電(dian)(dian)(dian)位(wei)(wei)測(ce)試(shi)(shi)儀(yi),發(fa)(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)電(dian)(dian)(dian)位(wei)(wei)外(wai)(wai)移(yi)測(ce)試(shi)(shi)儀(yi),發(fa)(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)定(ding)子(zi)手(shou)包絕緣(yuan)測(ce)試(shi)(shi)儀(yi),發(fa)(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)表(biao)(biao)面電(dian)(dian)(dian)位(wei)(wei)測(ce)量桿,發(fa)(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)定(ding)子(zi)線圈(quan)端部(bu)表(biao)(biao)面電(dian)(dian)(dian)位(wei)(wei)測(ce)量儀(yi). 發(fa)(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)電(dian)(dian)(dian)位(wei)(wei)外(wai)(wai)移(yi)檢(jian)測(ce)儀(yi),發(fa)(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)定(ding)子(zi)端部(bu)絕緣(yuan)測(ce)試(shi)(shi)儀(yi),發(fa)(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)手(shou)包絕緣(yuan)測(ce)量桿
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更新時間:2023-11-02
在線留言品牌 | 其他品牌 | 產地類別 | 國產 |
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應用領域 | 環保,石油,地礦,電子,交通 |
TFD-18發電機定子端部絕緣測試儀常規的(de)預防性試驗(yan)一般很難發(fa)(fa)(fa)現汽輪(lun)發(fa)(fa)(fa)電(dian)機內冷定(ding)子(zi)線端(duan)部(bu)(bu)絕緣(yuan)的(de)缺陷。直流(liu)加(jia)壓表面電(dian)位(wei)法試驗(yan)能有效(xiao)地找(zhao)出定(ding)子(zi)線圈(quan)端(duan)部(bu)(bu)的(de)絕緣(yuan)缺陷。定(ding)子(zi)端(duan)部(bu)(bu)相間短路故障,造(zao)成很大的(de)經濟損失,為此,電(dian)力(li)工(gong)業部(bu)(bu)和(he)機械工(gong)業部(bu)(bu)下達了(le)安(an)生技(1994)86號文(wen)件(jian),規定(ding)了(le)發(fa)(fa)(fa)電(dian)機端(duan)部(bu)(bu)手包絕緣(yuan)測量試驗(yan)為發(fa)(fa)(fa)電(dian)機的(de)重(zhong)要試驗(yan)項(xiang)目之一,TFD-18發(fa)(fa)(fa)電(dian)機定(ding)子(zi)端(duan)部(bu)(bu)表面電(dian)位(wei)測量桿是(shi)*86號文(wen)件(jian)精神的(de)高(gao)科技產品,它的(de)投入使用,極大地提高(gao)了(le)發(fa)(fa)(fa)電(dian)機的(de)檢修效(xiao)率。
別稱:電(dian)(dian)(dian)位(wei)差(cha)計,發(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)電(dian)(dian)(dian)位(wei)差(cha)計,發(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)表面(mian)電(dian)(dian)(dian)位(wei)測試(shi)儀,發(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)電(dian)(dian)(dian)位(wei)外移測試(shi)儀,發(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)定子(zi)手包絕緣測試(shi)儀,發(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)表面(mian)電(dian)(dian)(dian)位(wei)測量桿,發(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)定子(zi)線圈端部表面(mian)電(dian)(dian)(dian)位(wei)測量儀. 發(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)電(dian)(dian)(dian)位(wei)外移檢(jian)測儀,發(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)定子(zi)端部絕緣測試(shi)儀,發(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)手包絕緣測量桿
發電機定子端部絕緣測試儀,是利用表面電位法(又稱電位外移法)檢測發電機定子線棒絕緣缺陷的絕緣測試方法。通過檢測定子端部手包絕緣的密實性及相對絕緣強度。它可以彌補發電機定子繞組交、直流耐壓試驗所發現不了的端部絕緣缺陷的不足。可以發現引線包絕緣不良,線圈鼻端絕緣包扎缺陷,絕緣盒填充泥填充不滿,綁扎滌玻繩固化不良及端部接頭處定子空心銅線焊接質量不良造成的滲透等缺陷。發電機定子線圈端部表面電位測量是一項新的試驗項目,線圈端部起到了監督作用,進一步提高了發電機安全運行的可靠性。
TFD-18發電機定子端部絕緣測試儀技術參數:
1.輸(shu)入(ru)電阻100M
2.測試電壓:DC0-30KV
3.電(dian)壓精度:1.0%
試驗方法:
1 試(shi)驗標(biao)準(zhun)發(fa)電機定子(zi)線(xian)圈端(duan)部(bu)絕緣判(pan)斷標(biao)準(zhun),是加2 倍的額定電壓,漏泄電流不大于1微安(an)
2 試驗儀器直流高壓發(fa)生(sheng)裝置
3 測試原理將直流電壓加在定子線棒正常時由于線棒絕緣的體積電阻Ρρ 遠遠大于表面電阻ρσ , 對地電壓很低, 若某一線棒絕緣存在缺陷,它
的電(dian)壓(ya)分(fen)布將(jiang)發生明顯的變化,絕(jue)緣(yuan)存在(zai)缺陷時, Ρρ 減小,絕(jue)緣(yuan)壓(ya)降(jiang)(jiang)也降(jiang)(jiang)低,致(zhi)使缺陷部位對地電(dian)壓(ya)增高。
4 測試方法將繞組三相引出線用導線短路連接,直流高壓發生器加2倍電壓
,用發(fa)電(dian)(dian)機電(dian)(dian)位外移試驗儀測試電(dian)(dian)壓和電(dian)(dian)流
5.發(fa)電機電位(wei)外移(yi)試驗儀接線圖
6.尾棒的地線(xian)一(yi)定與高壓發生裝(zhuang)置的地線(xian)接在一(yi)起。
注意事項:
1、錫(xi)箔(bo)紙纏包(bao)端部時,一定要包(bao)裹緊密,否則錫(xi)箔(bo)紙和絕緣表面會(hui)(hui)構(gou)成電容,測(ce)量桿接觸時會(hui)(hui)有較大的(de)放(fang)電電流,造成誤判斷。
2、端部(bu)包裹時分(fen)為(wei)線棒(bang)側和引水管側,間(jian)隔大于(yu)3厘米(mi),電(dian)位(wei)高時便于(yu)查(cha)找(zhao)是哪(na)一(yi)側的問(wen)題(ti),其(qi)實zui主要的點是根部(bu)和錐部(bu),中間(jian)部(bu)位(wei)測量意義不大。
3、測量桿(gan)串接的(de)微安表(biao)用數(shu)字式微安表(biao),即便(bian)于(yu)讀數(shu)又可電流(liu)大時(shi)保(bao)護表(biao)記。
4、端部(bu)接頭因為在在機(ji)殼下部(bu),不易測量,提前用引線引出。
5、zui重要(yao)的是記正確異常槽號,避免張冠李(li)戴(dai),切記切記!
6、發電(dian)機不通水(shui)(shui)的情況(kuang)下進行(xing)試(shi)驗(yan),要求先(xian)將定子冷卻(que)水(shui)(shui)*吹凈(jing)。
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