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發電機定子手包絕緣測試儀

簡要描述:

別(bie)稱:電(dian)(dian)位(wei)差計(ji)(ji),發(fa)電(dian)(dian)機(ji)電(dian)(dian)位(wei)差計(ji)(ji),發(fa)電(dian)(dian)機(ji)表面(mian)電(dian)(dian)位(wei)測(ce)(ce)(ce)試(shi)儀(yi)(yi),發(fa)電(dian)(dian)機(ji)電(dian)(dian)位(wei)外(wai)移測(ce)(ce)(ce)試(shi)儀(yi)(yi),發(fa)電(dian)(dian)機(ji)定(ding)子手包絕(jue)(jue)緣測(ce)(ce)(ce)試(shi)儀(yi)(yi),發(fa)電(dian)(dian)機(ji)表面(mian)電(dian)(dian)位(wei)測(ce)(ce)(ce)量(liang)桿,發(fa)電(dian)(dian)機(ji)定(ding)子線(xian)圈端部表面(mian)電(dian)(dian)位(wei)測(ce)(ce)(ce)量(liang)儀(yi)(yi). 發(fa)電(dian)(dian)機(ji)電(dian)(dian)位(wei)外(wai)移檢測(ce)(ce)(ce)儀(yi)(yi),發(fa)電(dian)(dian)機(ji)定(ding)子端部絕(jue)(jue)緣測(ce)(ce)(ce)試(shi)儀(yi)(yi),發(fa)電(dian)(dian)機(ji)手包絕(jue)(jue)緣測(ce)(ce)(ce)量(liang)桿

在線留言

TFD-18發電機定子手包絕緣(yuan)測量桿

 常規的(de)(de)預(yu)防性試(shi)驗一般很難發(fa)現汽輪發(fa)電(dian)(dian)(dian)機(ji)內冷定子線端部(bu)絕(jue)緣(yuan)的(de)(de)缺(que)陷。直流加(jia)壓表(biao)面電(dian)(dian)(dian)位(wei)(wei)法(fa)試(shi)驗能有效地(di)(di)找出定子線圈端部(bu)的(de)(de)絕(jue)緣(yuan)缺(que)陷。定子端部(bu)相間短路故障,造成很大(da)的(de)(de)經濟損失,為此(ci),電(dian)(dian)(dian)力工業部(bu)和機(ji)械工業部(bu)下達了安生技(1994)86號文(wen)件,規定了發(fa)電(dian)(dian)(dian)機(ji)端部(bu)手包絕(jue)緣(yuan)測(ce)量試(shi)驗為發(fa)電(dian)(dian)(dian)機(ji)的(de)(de)重要試(shi)驗項目(mu)之一,TFD-18發(fa)電(dian)(dian)(dian)機(ji)定子端部(bu)表(biao)面電(dian)(dian)(dian)位(wei)(wei)測(ce)量桿是*86號文(wen)件精神(shen)的(de)(de)高(gao)科技產品(pin),它的(de)(de)投入使用(yong),極大(da)地(di)(di)提(ti)高(gao)了發(fa)電(dian)(dian)(dian)機(ji)的(de)(de)檢修效率。

別稱:電(dian)(dian)(dian)(dian)(dian)位差計,發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)電(dian)(dian)(dian)(dian)(dian)位差計,發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)表(biao)面(mian)電(dian)(dian)(dian)(dian)(dian)位測(ce)(ce)試(shi)儀(yi),發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)電(dian)(dian)(dian)(dian)(dian)位外(wai)移測(ce)(ce)試(shi)儀(yi),發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)定子手包(bao)絕緣(yuan)測(ce)(ce)試(shi)儀(yi),發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)表(biao)面(mian)電(dian)(dian)(dian)(dian)(dian)位測(ce)(ce)量(liang)桿,發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)定子線(xian)圈端部(bu)表(biao)面(mian)電(dian)(dian)(dian)(dian)(dian)位測(ce)(ce)量(liang)儀(yi). 發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)電(dian)(dian)(dian)(dian)(dian)位外(wai)移檢(jian)測(ce)(ce)儀(yi),發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)定子端部(bu)絕緣(yuan)測(ce)(ce)試(shi)儀(yi),發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)手包(bao)絕緣(yuan)測(ce)(ce)量(liang)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。
 

技術參數:

 1.輸入電阻100M

 2.測(ce)試電壓:DC0-30KV

 3.電(dian)壓精度(du):1.0%

試驗方法:

1 試驗標(biao)準(zhun)發(fa)電機定子(zi)線(xian)圈端部絕緣判斷標(biao)準(zhun),是加2 倍的額定電壓,漏泄電流不大(da)于1微安

2 試驗(yan)儀(yi)器直流高壓(ya)發生(sheng)裝(zhuang)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(de)電壓(ya)分布(bu)將發生明顯的(de)變(bian)化,絕緣存在缺陷時, Ρρ 減小,絕緣壓(ya)降也(ye)降低(di),致使缺陷部位對地電壓(ya)增(zeng)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(yong)發(fa)電(dian)(dian)機電(dian)(dian)位外移(yi)試驗儀測(ce)試電(dian)(dian)壓和電(dian)(dian)流

5.發電機電位外移試驗(yan)儀接線圖(tu)

6.尾棒的(de)地線(xian)一定與(yu)高壓發(fa)生(sheng)裝置的(de)地線(xian)接在一起。

注意事項:

1、錫(xi)箔紙(zhi)纏包端部(bu)時,一(yi)定要包裹(guo)緊密,否則錫(xi)箔紙(zhi)和(he)絕(jue)緣表面會構(gou)成電容,測量桿(gan)接觸時會有較大(da)的放(fang)電電流,造成誤判斷。

2、端部包裹時分(fen)為線棒(bang)側和引水管側,間隔(ge)大(da)(da)于(yu)(yu)3厘米(mi),電位高時便(bian)于(yu)(yu)查(cha)找是哪一側的問題,其(qi)實zui主要的點是根部和錐(zhui)部,中間部位測量意義不大(da)(da)。

3、測量桿串接的微(wei)(wei)安表(biao)用數字式微(wei)(wei)安表(biao),即便于讀數又可電流大時保護表(biao)記。

4、端(duan)部接(jie)頭因為在(zai)在(zai)機殼下部,不易測(ce)量,提(ti)前用(yong)引線引出(chu)。

5、zui重要(yao)的是(shi)記(ji)正確(que)異常槽號,避免張(zhang)冠李戴,切記(ji)切記(ji)!

6、發電機(ji)不通(tong)水的(de)情(qing)況下進行試驗(yan),要求先將定子冷卻(que)水*吹凈。

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