別稱：電(dian)(dian)(dian)(dian)位(wei)差(cha)計(ji)，發(fa)(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)電(dian)(dian)(dian)(dian)位(wei)差(cha)計(ji)，，發(fa)(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)電(dian)(dian)(dian)(dian)位(wei)外移測(ce)(ce)試(shi)儀(yi)，發(fa)(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)定子(zi)(zi)手(shou)包絕(jue)緣(yuan)(yuan)測(ce)(ce)試(shi)儀(yi)，發(fa)(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)表面電(dian)(dian)(dian)(dian)位(wei)測(ce)(ce)量桿(gan)，發(fa)(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)定子(zi)(zi)線(xian)圈端(duan)(duan)部表面電(dian)(dian)(dian)(dian)位(wei)測(ce)(ce)量儀(yi). 發(fa)(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)電(dian)(dian)(dian)(dian)位(wei)外移檢(jian)測(ce)(ce)儀(yi)，發(fa)(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)表面電(dian)(dian)(dian)(dian)位(wei)測(ce)(ce)量儀(yi)，發(fa)(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)定子(zi)(zi)端(duan)(duan)部絕(jue)緣(yuan)(yuan)測(ce)(ce)試(shi)儀(yi)，發(fa)(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)手(shou)包絕(jue)緣(yuan)(yuan)測(ce)(ce)量桿(gan)

發(fa)電(dian)(dian)機(ji)定(ding)(ding)子(zi)(zi)端部(bu)(bu)(bu)絕(jue)緣(yuan)測試(shi)(shi)(shi)儀，是利(li)用表(biao)面電(dian)(dian)位(wei)法（又稱電(dian)(dian)位(wei)外移法）檢(jian)測發(fa)電(dian)(dian)機(ji)定(ding)(ding)子(zi)(zi)線棒絕(jue)緣(yuan)缺陷(xian)(xian)的(de)絕(jue)緣(yuan)測試(shi)(shi)(shi)方法。通過檢(jian)測定(ding)(ding)子(zi)(zi)端部(bu)(bu)(bu)手包絕(jue)緣(yuan)的(de)密實性及相對絕(jue)緣(yuan)強度。它可以彌補發(fa)電(dian)(dian)機(ji)定(ding)(ding)子(zi)(zi)繞組交、直流耐壓試(shi)(shi)(shi)驗所發(fa)現不了(le)的(de)端部(bu)(bu)(bu)絕(jue)緣(yuan)缺陷(xian)(xian)的(de)不足。可以發(fa)現引線包絕(jue)緣(yuan)不良(liang)，線圈(quan)鼻端絕(jue)緣(yuan)包扎缺陷(xian)(xian)，絕(jue)緣(yuan)盒填充(chong)泥填充(chong)不滿(man)，綁扎滌玻(bo)繩(sheng)固化不良(liang)及端部(bu)(bu)(bu)接(jie)頭處定(ding)(ding)子(zi)(zi)空心銅線焊接(jie)質量(liang)不良(liang)造(zao)成(cheng)的(de)滲(shen)透等缺陷(xian)(xian)。發(fa)電(dian)(dian)機(ji)定(ding)(ding)子(zi)(zi)線圈(quan)端部(bu)(bu)(bu)表(biao)面電(dian)(dian)位(wei)測量(liang)是一項新的(de)試(shi)(shi)(shi)驗項目，線圈(quan)端部(bu)(bu)(bu)起到了(le)監督作用，進一步(bu)提高了(le)發(fa)電(dian)(dian)機(ji)安(an)全運行的(de)可靠性。

發電機表面電位測試儀技術參數：

 1．輸入(ru)電(dian)(dian)(dian)(dian)阻(zu)100M 2．測(ce)試(shi)(shi)電(dian)(dian)(dian)(dian)壓(ya)：DC0-30KV 3．電(dian)(dian)(dian)(dian)壓(ya)精度：1。0% 試(shi)(shi)驗方法： 1 試(shi)(shi)驗標準(zhun)發(fa)電(dian)(dian)(dian)(dian)機定(ding)子線(xian)(xian)圈端部絕緣(yuan)判斷(duan)標準(zhun)，是加2 倍的(de)額(e)定(ding)電(dian)(dian)(dian)(dian)壓(ya)，漏泄電(dian)(dian)(dian)(dian)流不大(da)于(yu)1微(wei)安 2 試(shi)(shi)驗儀器直(zhi)流高壓(ya)發(fa)生(sheng)裝置 3 測(ce)試(shi)(shi)原理將直(zhi)流電(dian)(dian)(dian)(dian)壓(ya)加在(zai)(zai)定(ding)子線(xian)(xian)棒正常時(shi)由(you)于(yu)線(xian)(xian)棒絕緣(yuan)的(de)體積電(dian)(dian)(dian)(dian)阻(zu)Ρρ 遠遠大(da)于(yu)表面電(dian)(dian)(dian)(dian)阻(zu)ρσ , 對地(di)電(dian)(dian)(dian)(dian)壓(ya)很低，若某一(yi)(yi)線(xian)(xian)棒絕緣(yuan)存在(zai)(zai)缺(que)陷,它的(de)電(dian)(dian)(dian)(dian)壓(ya)分布將發(fa)生(sheng)明顯(xian)的(de)變(bian)化(hua),絕緣(yuan)存在(zai)(zai)缺(que)陷時(shi), Ρρ 減小(xiao),絕緣(yuan)壓(ya)降(jiang)也降(jiang)低,致使缺(que)陷部位(wei)對地(di)電(dian)(dian)(dian)(dian)壓(ya)增高。 4 測(ce)試(shi)(shi)方法將繞組(zu)三相引(yin)出(chu)線(xian)(xian)用(yong)導線(xian)(xian)短路(lu)連接(jie)(jie)，直(zhi)流高壓(ya)發(fa)生(sheng)器加2倍電(dian)(dian)(dian)(dian)壓(ya)，用(yong)發(fa)電(dian)(dian)(dian)(dian)機電(dian)(dian)(dian)(dian)位(wei)外移試(shi)(shi)驗儀測(ce)試(shi)(shi)電(dian)(dian)(dian)(dian)壓(ya)和(he)電(dian)(dian)(dian)(dian)流 5．發(fa)電(dian)(dian)(dian)(dian)機電(dian)(dian)(dian)(dian)位(wei)外移試(shi)(shi)驗儀接(jie)(jie)線(xian)(xian)圖 6．尾棒的(de)地(di)線(xian)(xian)一(yi)(yi)定(ding)與高壓(ya)發(fa)生(sheng)裝置的(de)地(di)線(xian)(xian)接(jie)(jie)在(zai)(zai)一(yi)(yi)起。

注意事項：

1、錫箔(bo)(bo)紙(zhi)纏包(bao)端部時，一定要包(bao)裹緊密(mi)，否(fou)則錫箔(bo)(bo)紙(zhi)和(he)絕(jue)緣表面會(hui)構成(cheng)(cheng)電(dian)容，測量桿接觸時會(hui)有較大(da)的放(fang)電(dian)電(dian)流,造成(cheng)(cheng)誤判斷。

2、端部包(bao)裹時最好分為線棒側和引水管側，間隔(ge)大(da)于(yu)3厘米，電位高時便于(yu)查找是(shi)哪一側的問題(ti)，其(qi)實最主(zhu)要的點是(shi)根(gen)部和錐部，中間部位測量意(yi)義不大(da)。

3、測量(liang)桿(gan)串接的微安表最好(hao)用數字(zi)式微安表，即便于讀數又(you)可電流(liu)大(da)時保護表記。

4、端(duan)部接(jie)頭因(yin)為在在機殼下部，不易測量，最(zui)好提前用引(yin)線引(yin)出(chu)。

5、最重要的是(shi)記正(zheng)確異常槽號，避免張(zhang)冠李戴，切記切記！

6、發電機不通水(shui)的情況下進行試驗，要求先將定子冷(leng)卻水(shui)吹凈。