別(bie)稱：電(dian)(dian)位差(cha)計(ji)，發(fa)(fa)(fa)(fa)電(dian)(dian)機(ji)電(dian)(dian)位差(cha)計(ji)，，發(fa)(fa)(fa)(fa)電(dian)(dian)機(ji)電(dian)(dian)位外移(yi)測(ce)(ce)試儀(yi)，發(fa)(fa)(fa)(fa)電(dian)(dian)機(ji)定子(zi)手(shou)包絕緣(yuan)測(ce)(ce)試儀(yi)，發(fa)(fa)(fa)(fa)電(dian)(dian)機(ji)表(biao)面(mian)電(dian)(dian)位測(ce)(ce)量(liang)桿(gan)，發(fa)(fa)(fa)(fa)電(dian)(dian)機(ji)定子(zi)線圈(quan)端(duan)部(bu)(bu)表(biao)面(mian)電(dian)(dian)位測(ce)(ce)量(liang)儀(yi). 發(fa)(fa)(fa)(fa)電(dian)(dian)機(ji)電(dian)(dian)位外移(yi)檢測(ce)(ce)儀(yi)，發(fa)(fa)(fa)(fa)電(dian)(dian)機(ji)表(biao)面(mian)電(dian)(dian)位測(ce)(ce)量(liang)儀(yi)，發(fa)(fa)(fa)(fa)電(dian)(dian)機(ji)定子(zi)端(duan)部(bu)(bu)絕緣(yuan)測(ce)(ce)試儀(yi)，發(fa)(fa)(fa)(fa)電(dian)(dian)機(ji)手(shou)包絕緣(yuan)測(ce)(ce)量(liang)桿(gan)
發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)定(ding)子(zi)(zi)端(duan)(duan)部(bu)絕緣測(ce)試(shi)儀，是利用表(biao)面(mian)(mian)電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)法（又稱電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)外(wai)移(yi)法）檢測(ce)發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)定(ding)子(zi)(zi)線(xian)(xian)棒絕緣缺陷(xian)的(de)絕緣測(ce)試(shi)方法。通(tong)過檢測(ce)定(ding)子(zi)(zi)端(duan)(duan)部(bu)手包(bao)絕緣的(de)密實(shi)性及相(xiang)對(dui)絕緣強度。它可以彌補發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)定(ding)子(zi)(zi)繞組交(jiao)、直流(liu)耐壓(ya)試(shi)驗(yan)所發(fa)現(xian)不(bu)了(le)的(de)端(duan)(duan)部(bu)絕緣缺陷(xian)的(de)不(bu)足(zu)。可以發(fa)現(xian)引線(xian)(xian)包(bao)絕緣不(bu)良，線(xian)(xian)圈(quan)(quan)鼻(bi)端(duan)(duan)絕緣包(bao)扎(zha)缺陷(xian)，絕緣盒填充泥填充不(bu)滿(man)，綁(bang)扎(zha)滌玻(bo)繩固化不(bu)良及端(duan)(duan)部(bu)接頭處(chu)定(ding)子(zi)(zi)空心銅線(xian)(xian)焊(han)接質(zhi)量不(bu)良造成的(de)滲透等缺陷(xian)。發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)定(ding)子(zi)(zi)線(xian)(xian)圈(quan)(quan)端(duan)(duan)部(bu)表(biao)面(mian)(mian)電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)測(ce)量是一(yi)項(xiang)新的(de)試(shi)驗(yan)項(xiang)目，線(xian)(xian)圈(quan)(quan)端(duan)(duan)部(bu)起(qi)到了(le)監(jian)督作(zuo)用，進一(yi)步(bu)提高了(le)發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)安(an)全運(yun)行的(de)可靠性。
發電機表面電位測試儀技術參數：
1．輸(shu)入電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻100M 2．測(ce)試(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)：DC0-30KV 3．電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)精度：1。0% 試(shi)(shi)驗方法(fa)： 1 試(shi)(shi)驗標準(zhun)發電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)定(ding)子線(xian)圈端部(bu)絕緣(yuan)(yuan)判斷標準(zhun)，是加2 倍(bei)的額定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)，漏泄(xie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流不大(da)于(yu)1微安 2 試(shi)(shi)驗儀(yi)(yi)器(qi)直流高壓(ya)(ya)(ya)(ya)發生裝(zhuang)置 3 測(ce)試(shi)(shi)原理將直流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)加在定(ding)子線(xian)棒(bang)正(zheng)常(chang)時由于(yu)線(xian)棒(bang)絕緣(yuan)(yuan)的體積(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻Ρρ 遠遠大(da)于(yu)表面電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻ρσ , 對地(di)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)很(hen)低，若某一(yi)線(xian)棒(bang)絕緣(yuan)(yuan)存在缺陷(xian)(xian),它的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)分布將發生明顯的變化(hua),絕緣(yuan)(yuan)存在缺陷(xian)(xian)時, Ρρ 減小,絕緣(yuan)(yuan)壓(ya)(ya)(ya)(ya)降也降低,致使缺陷(xian)(xian)部(bu)位對地(di)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)增高。 4 測(ce)試(shi)(shi)方法(fa)將繞組三相引出線(xian)用導(dao)線(xian)短路(lu)連接，直流高壓(ya)(ya)(ya)(ya)發生器(qi)加2倍(bei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)，用發電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位外(wai)(wai)移試(shi)(shi)驗儀(yi)(yi)測(ce)試(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)和電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流 5．發電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位外(wai)(wai)移試(shi)(shi)驗儀(yi)(yi)接線(xian)圖(tu) 6．尾棒(bang)的地(di)線(xian)一(yi)定(ding)與(yu)高壓(ya)(ya)(ya)(ya)發生裝(zhuang)置的地(di)線(xian)接在一(yi)起(qi)。
注意事項：
1、錫(xi)箔紙纏包(bao)端部時，一(yi)定要(yao)包(bao)裹緊密，否(fou)則錫(xi)箔紙和絕緣表面會(hui)構成電容，測量桿接觸時會(hui)有較大的放(fang)電電流,造成誤(wu)判斷(duan)。
2、端部(bu)(bu)包裹時最好分為(wei)線棒側和(he)引水(shui)管側，間(jian)隔大于(yu)3厘米，電位(wei)高時便于(yu)查找是哪一側的問題，其實(shi)最主要的點(dian)是根(gen)部(bu)(bu)和(he)錐(zhui)部(bu)(bu)，中間(jian)部(bu)(bu)位(wei)測量(liang)意義不大。
3、測量桿串(chuan)接的微安表最好用數(shu)字(zi)式微安表，即便于讀(du)數(shu)又可電流(liu)大時保護(hu)表記(ji)。
4、端部接頭(tou)因為在在機殼下部，不易測量，最好(hao)提前用引線引出。
5、最重要的是記(ji)(ji)正確異常槽號，避免張(zhang)冠李戴，切記(ji)(ji)切記(ji)(ji)！
6、發電機(ji)不(bu)通水的情(qing)況下(xia)進行試驗，要(yao)求先將定(ding)子冷(leng)卻水吹(chui)凈(jing)。
