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發電機定子端部絕緣測試儀

簡要描述:

別稱:電(dian)(dian)(dian)(dian)(dian)位(wei)差計,發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)電(dian)(dian)(dian)(dian)(dian)位(wei)差計,發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)表(biao)面(mian)電(dian)(dian)(dian)(dian)(dian)位(wei)測(ce)試(shi)儀(yi),發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)電(dian)(dian)(dian)(dian)(dian)位(wei)外移測(ce)試(shi)儀(yi),發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)定子手包絕緣測(ce)試(shi)儀(yi),發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)表(biao)面(mian)電(dian)(dian)(dian)(dian)(dian)位(wei)測(ce)量(liang)(liang)桿,發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)定子線圈端(duan)部表(biao)面(mian)電(dian)(dian)(dian)(dian)(dian)位(wei)測(ce)量(liang)(liang)儀(yi). 發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)電(dian)(dian)(dian)(dian)(dian)位(wei)外移檢測(ce)儀(yi),發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)定子端(duan)部絕緣測(ce)試(shi)儀(yi),發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)手包絕緣測(ce)量(liang)(liang)桿

在線留言

TFD-18發電機定子手包(bao)絕緣測量桿

 常規的(de)(de)預防性試驗(yan)一般很(hen)難發(fa)(fa)現汽輪發(fa)(fa)電(dian)(dian)機內(nei)冷定子(zi)線端部(bu)(bu)絕緣(yuan)(yuan)的(de)(de)缺陷。直(zhi)流加(jia)壓表面電(dian)(dian)位法試驗(yan)能有(you)效(xiao)地找出定子(zi)線圈端部(bu)(bu)的(de)(de)絕緣(yuan)(yuan)缺陷。定子(zi)端部(bu)(bu)相間短(duan)路故(gu)障,造成很(hen)大(da)的(de)(de)經(jing)濟損失,為(wei)(wei)此,電(dian)(dian)力(li)工業(ye)部(bu)(bu)和(he)機械(xie)工業(ye)部(bu)(bu)下達了(le)安(an)生技(1994)86號文件,規定了(le)發(fa)(fa)電(dian)(dian)機端部(bu)(bu)手包(bao)絕緣(yuan)(yuan)測量試驗(yan)為(wei)(wei)發(fa)(fa)電(dian)(dian)機的(de)(de)重要試驗(yan)項目之一,TFD-18發(fa)(fa)電(dian)(dian)機定子(zi)端部(bu)(bu)表面電(dian)(dian)位測量桿(gan)是*86號文件精神的(de)(de)高科技產品,它(ta)的(de)(de)投(tou)入使用(yong),極大(da)地提高了(le)發(fa)(fa)電(dian)(dian)機的(de)(de)檢修效(xiao)率。

別稱:電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)差計,發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)差計,發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)表面(mian)電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)測(ce)(ce)(ce)(ce)試儀(yi)(yi)(yi),發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)外(wai)移測(ce)(ce)(ce)(ce)試儀(yi)(yi)(yi),發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)定子(zi)(zi)手包絕(jue)緣(yuan)(yuan)測(ce)(ce)(ce)(ce)試儀(yi)(yi)(yi),發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)表面(mian)電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)測(ce)(ce)(ce)(ce)量(liang)桿,發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)定子(zi)(zi)線圈(quan)端(duan)部表面(mian)電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)測(ce)(ce)(ce)(ce)量(liang)儀(yi)(yi)(yi). 發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)外(wai)移檢測(ce)(ce)(ce)(ce)儀(yi)(yi)(yi),發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)定子(zi)(zi)端(duan)部絕(jue)緣(yuan)(yuan)測(ce)(ce)(ce)(ce)試儀(yi)(yi)(yi),發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)手包絕(jue)緣(yuan)(yuan)測(ce)(ce)(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(dian)阻100M

 2.測試電壓:DC0-30KV

 3.電壓精度(du):1.0%

試驗方法:

1 試驗標(biao)準發電(dian)(dian)機定子線圈(quan)端部(bu)絕緣判斷(duan)標(biao)準,是加2 倍(bei)的額定電(dian)(dian)壓,漏泄電(dian)(dian)流(liu)不大于(yu)1微(wei)安

2 試驗(yan)儀器直流(liu)高壓發生裝置

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(de)(de)電(dian)壓(ya)分布將(jiang)發生明顯的(de)(de)變化,絕(jue)緣存在缺陷(xian)時, Ρρ 減小(xiao),絕(jue)緣壓(ya)降也降低,致(zhi)使缺陷(xian)部位對地電(dian)壓(ya)增高(gao)。

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(ji)電位外(wai)移試驗儀測試電壓和電流(liu)

5.發電機(ji)電位外(wai)移試驗儀(yi)接(jie)線(xian)圖

6.尾棒(bang)的地線一定(ding)與高壓(ya)發(fa)生裝置的地線接在一起。

注意事項:

1、錫箔紙纏(chan)包端部時,一定要包裹(guo)緊密,否則錫箔紙和絕緣表面會構成電容(rong),測量桿接觸時會有(you)較大的放電電流,造成誤判(pan)斷。

2、端部包(bao)裹時(shi)分為線(xian)棒側和(he)(he)引水管側,間(jian)隔大于3厘米(mi),電(dian)位高時(shi)便于查(cha)找(zhao)是哪一(yi)側的(de)問題(ti),其(qi)實zui主(zhu)要的(de)點是根部和(he)(he)錐(zhui)部,中間(jian)部位測量意(yi)義不大。

3、測量(liang)桿串接的微(wei)安表用數字(zi)式微(wei)安表,即便于讀數又(you)可電流大時(shi)保護表記(ji)。

4、端(duan)部接頭(tou)因(yin)為在在機殼下部,不易測量,提前(qian)用(yong)引(yin)線引(yin)出。

5、zui重要的是記正確異常槽(cao)號,避免張冠李戴,切記切記!

6、發電(dian)機不通水的情況下(xia)進行(xing)試驗,要求先將(jiang)定子冷(leng)卻水*吹凈(jing)。

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