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首頁>產品中心>接地電阻測試系列>發電機電位外移測試儀>發電機定子線圈端部表面電位測量儀

發電機定子線圈端部表面電位測量儀

簡要描述:

別稱:電(dian)(dian)位差計,發(fa)電(dian)(dian)機(ji)(ji)電(dian)(dian)位差計,發(fa)電(dian)(dian)機(ji)(ji)表面電(dian)(dian)位測(ce)試(shi)(shi)儀(yi),發(fa)電(dian)(dian)機(ji)(ji)電(dian)(dian)位外(wai)移測(ce)試(shi)(shi)儀(yi),發(fa)電(dian)(dian)機(ji)(ji)定(ding)子手包(bao)絕緣測(ce)試(shi)(shi)儀(yi),發(fa)電(dian)(dian)機(ji)(ji)表面電(dian)(dian)位測(ce)量(liang)桿,發(fa)電(dian)(dian)機(ji)(ji)定(ding)子線圈端部(bu)表面電(dian)(dian)位測(ce)量(liang)儀(yi). 發(fa)電(dian)(dian)機(ji)(ji)電(dian)(dian)位外(wai)移檢測(ce)儀(yi),發(fa)電(dian)(dian)機(ji)(ji)定(ding)子端部(bu)絕緣測(ce)試(shi)(shi)儀(yi),發(fa)電(dian)(dian)機(ji)(ji)手包(bao)絕緣測(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(gui)的(de)(de)(de)預(yu)防性試(shi)(shi)驗(yan)一(yi)般(ban)很難發現汽輪發電(dian)(dian)(dian)(dian)機(ji)(ji)內冷(leng)定(ding)子(zi)線端(duan)部(bu)(bu)(bu)絕緣的(de)(de)(de)缺陷(xian)(xian)。直(zhi)流加壓表(biao)面電(dian)(dian)(dian)(dian)位(wei)法(fa)試(shi)(shi)驗(yan)能有效(xiao)(xiao)地找出定(ding)子(zi)線圈(quan)端(duan)部(bu)(bu)(bu)的(de)(de)(de)絕緣缺陷(xian)(xian)。定(ding)子(zi)端(duan)部(bu)(bu)(bu)相(xiang)間短路故障,造成很大的(de)(de)(de)經濟損失(shi),為(wei)此,電(dian)(dian)(dian)(dian)力(li)工(gong)業(ye)(ye)部(bu)(bu)(bu)和機(ji)(ji)械工(gong)業(ye)(ye)部(bu)(bu)(bu)下達了安生技(ji)(1994)86號(hao)文(wen)件(jian),規(gui)定(ding)了發電(dian)(dian)(dian)(dian)機(ji)(ji)端(duan)部(bu)(bu)(bu)手包絕緣測(ce)量試(shi)(shi)驗(yan)為(wei)發電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)(de)重要(yao)試(shi)(shi)驗(yan)項目之一(yi),TFD-18發電(dian)(dian)(dian)(dian)機(ji)(ji)定(ding)子(zi)端(duan)部(bu)(bu)(bu)表(biao)面電(dian)(dian)(dian)(dian)位(wei)測(ce)量桿是(shi)*86號(hao)文(wen)件(jian)精神的(de)(de)(de)高(gao)科技(ji)產品,它的(de)(de)(de)投入使用,極大地提高(gao)了發電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)(de)檢(jian)修效(xiao)(xiao)率。

別(bie)稱:電(dian)(dian)(dian)位(wei)(wei)差計,發(fa)(fa)(fa)電(dian)(dian)(dian)機電(dian)(dian)(dian)位(wei)(wei)差計,發(fa)(fa)(fa)電(dian)(dian)(dian)機表(biao)面電(dian)(dian)(dian)位(wei)(wei)測(ce)(ce)試(shi)儀(yi),發(fa)(fa)(fa)電(dian)(dian)(dian)機電(dian)(dian)(dian)位(wei)(wei)外(wai)移(yi)測(ce)(ce)試(shi)儀(yi),發(fa)(fa)(fa)電(dian)(dian)(dian)機定(ding)(ding)子(zi)手包(bao)絕(jue)緣測(ce)(ce)試(shi)儀(yi),發(fa)(fa)(fa)電(dian)(dian)(dian)機表(biao)面電(dian)(dian)(dian)位(wei)(wei)測(ce)(ce)量桿,發(fa)(fa)(fa)電(dian)(dian)(dian)機定(ding)(ding)子(zi)線圈端(duan)部表(biao)面電(dian)(dian)(dian)位(wei)(wei)測(ce)(ce)量儀(yi). 發(fa)(fa)(fa)電(dian)(dian)(dian)機電(dian)(dian)(dian)位(wei)(wei)外(wai)移(yi)檢測(ce)(ce)儀(yi),發(fa)(fa)(fa)電(dian)(dian)(dian)機定(ding)(ding)子(zi)端(duan)部絕(jue)緣測(ce)(ce)試(shi)儀(yi),發(fa)(fa)(fa)電(dian)(dian)(dian)機手包(bao)絕(jue)緣測(ce)(ce)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。
 

技術參數:

 1.輸入電阻100M

 2.測試電壓:DC0-30KV

 3.電壓(ya)精度:1.0%

試驗方法:

1 試驗(yan)標(biao)準發電(dian)機定(ding)子線圈端部(bu)絕緣判斷(duan)標(biao)準,是加2 倍的額定(ding)電(dian)壓,漏泄電(dian)流(liu)不大于1微安

2 試(shi)驗儀(yi)器直(zhi)流高壓發(fa)生(sheng)裝置(zhi)

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
的電壓(ya)分布將發生明顯的變化,絕(jue)緣(yuan)存在缺陷時, Ρρ 減(jian)小,絕(jue)緣(yuan)壓(ya)降(jiang)也降(jiang)低,致(zhi)使缺陷部(bu)位對地電壓(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
,用發電機電位外移試(shi)驗儀測(ce)試(shi)電壓和電流

5.發電機電位(wei)外(wai)移試(shi)驗儀接線圖

6.尾棒的地(di)線一(yi)定與高(gao)壓發生裝置的地(di)線接在一(yi)起。

注意事項:

1、錫箔紙(zhi)纏包(bao)端部時(shi),一定要包(bao)裹緊密,否(fou)則錫箔紙(zhi)和絕緣表面(mian)會(hui)(hui)構(gou)成(cheng)電容(rong),測量桿接觸時(shi)會(hui)(hui)有較大的放(fang)電電流(liu),造成(cheng)誤(wu)判(pan)斷。

2、端部包(bao)裹時分為線棒側和引水管側,間隔大于3厘米,電位高時便于查找(zhao)是(shi)哪(na)一(yi)側的問(wen)題,其實(shi)zui主要的點是(shi)根部和錐部,中間部位測量意(yi)義不大。

3、測量桿串接的(de)微安表用數字式微安表,即便于讀數又可電流大時保護表記。

4、端部接頭因為在(zai)在(zai)機殼下(xia)部,不(bu)易測量,提前用引線引出。

5、zui重要的(de)是記正確(que)異常槽(cao)號,避免張冠李戴,切記切記!

6、發電機不(bu)通水的情況下(xia)進行(xing)試驗,要求先將定子(zi)冷卻水*吹(chui)凈。

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