電(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)障(zhang)(zhang)測(ce)試(shi)儀(yi)是(shi)一套綜合性的電(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)障(zhang)(zhang)探測(ce)儀(yi)器，適(shi)用于測(ce)量各(ge)種(zhong)(zhong)各(ge)種(zhong)(zhong)型號、不同(tong)等級電(dian)(dian)壓的電(dian)(dian)力電(dian)(dian)纜(lan)(lan)(lan)(lan)、高(gao)頻同(tong)軸電(dian)(dian)纜(lan)(lan)(lan)(lan)、市話(hua)電(dian)(dian)纜(lan)(lan)(lan)(lan)、路(lu)(lu)燈電(dian)(dian)纜(lan)(lan)(lan)(lan)、地埋電(dian)(dian)線(xian)的低阻、短路(lu)(lu)、開路(lu)(lu)斷(duan)線(xian)故(gu)障(zhang)(zhang)，以及高(gao)阻泄漏和高(gao)阻閃絡(luo)性故(gu)障(zhang)(zhang)。接下來，國電(dian)(dian)中星總結了電(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)障(zhang)(zhang)測(ce)試(shi)儀(yi)使用注意事項，希(xi)望能夠對大(da)家使用電(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)障(zhang)(zhang)測(ce)試(shi)儀(yi)能夠提供幫助(zhu)。

一、測試前的準備

1、測試正常狀態(tai)的(de)檢(jian)查

使用電纜故障測試(shi)儀(yi)之(zhi)前(qian)，可按以下(xia)步驟(zou)，檢查儀(yi)器是否正(zheng)常工作。

2、故障(zhang)種類的初步判斷

測(ce)試前(qian)對故障(zhang)原因和(he)種(zhong)類(lei)的分析是很(hen)有(you)必要的，可選(xuan)用(yong)通(tong)用(yong)儀表如歐姆(mu)表、兆歐表等結合現(xian)場(chang)情況和(he)實際經驗作初步(bu)分析判斷。

3、選擇觸發工作方式

如果是斷線、接觸不(bu)良、低阻接地與短路故(gu)障，應采用(yong)脈沖法(fa)。若為(wei)電力電纜的高阻閃絡(luo)故(gu)障則應采用(yong)閃絡(luo)法(fa)。并將觸發(fa)工作(zuo)方(fang)式選擇(ze)開關置于相應的位(wei)置。

二、使用注意事(shi)項(xiang) 

1、脈沖(chong)法測(ce)(ce)試時(shi)，注意要甩掉局內所有設備，在(zai)外線上進行測(ce)(ce)量(liang)

2、使(shi)用閃絡(luo)法(fa)測試時(shi)，必須將(jiang)觸發工作方式開關(guan)置于“閃絡(luo)”位(wei)置。

3、在(zai)使用(yong)直(zhi)閃法活沖閃法測試(shi)時，要注(zhu)意人身安(an)全及(ji)設備安(an)全，必須接(jie)好地線。地線連(lian)接(jie)如圖所示正確(que)連(lian)接(jie)好

4、在閃絡(luo)法測試結束(shu)后，切(qie)斷電(dian)(dian)(dian)源(yuan)，拆除(chu)電(dian)(dian)(dian)纜故障(zhang)測試儀(yi)與高壓測試裝置(zhi)的連接(jie)線，再(zai)對高壓電(dian)(dian)(dian)容(rong)器和(he)電(dian)(dian)(dian)纜的所貯(zhu)電(dian)(dian)(dian)荷進(jin)行放電(dian)(dian)(dian)。放電(dian)(dian)(dian)時(shi)，應先加限(xian)(xian)流(liu)(liu)電(dian)(dian)(dian)阻R限(xian)(xian)制放電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)以使電(dian)(dian)(dian)流(liu)(liu)緩慢(man)放電(dian)(dian)(dian)，待電(dian)(dian)(dian)容(rong)器上電(dian)(dian)(dian)壓降低(di)后，再(zai)直接(jie)對地放電(dian)(dian)(dian)電(dian)(dian)(dian)路中電(dian)(dian)(dian)阻為零，瞬(shun)間放電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)可(ke)高達幾百安培，將發(fa)生嚴(yan)重的設備(bei)或人身(shen)事故。

5、直閃(shan)法(fa)測(ce)試過程中(zhong)，必須注(zhu)意(yi)監視(shi)故(gu)障(zhang)的泄漏電(dian)(dian)流若電(dian)(dian)流突然增大，故(gu)障(zhang)閃(shan)絡現(xian)象未(wei)曾出現(xian)，應立即降低(di)試驗電(dian)(dian)壓，改用沖閃(shan)法(fa)測(ce)試。