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電(dian)力電(dian)纜(lan)(lan)外(wai)護套測(ce)量儀(yi)性能(neng):地埋電(dian)纜(lan)(lan)外(wai)護套故(gu)障的測(ce)尋,同電(dian)力電(dian)纜(lan)(lan)故(gu)障探測(ce)一(yi)樣,一(yi)般要經過“初測(ce)"和(he)“定點"二個(ge)步(bu)驟,有時甚至還需要查找電(dian)纜(lan)(lan)路徑。
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電力電纜外護套測量儀性能(neng):地埋電(dian)(dian)(dian)纜(lan)(lan)外(wai)(wai)護(hu)(hu)套故(gu)(gu)(gu)障(zhang)的(de)(de)測(ce)(ce)尋,同(tong)電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)(lan)故(gu)(gu)(gu)障(zhang)探測(ce)(ce)一樣,一般要(yao)經過(guo)“初(chu)測(ce)(ce)”和“定點(dian)”二個步驟,有時甚(shen)至還需要(yao)查找(zhao)電(dian)(dian)(dian)纜(lan)(lan)路徑。外(wai)(wai)護(hu)(hu)套接地故(gu)(gu)(gu)障(zhang)的(de)(de)初(chu)測(ce)(ce)(測(ce)(ce)距)一般采用壓(ya)降法和電(dian)(dian)(dian)橋法測(ce)(ce)試。由于(yu)(yu)電(dian)(dian)(dian)橋法測(ce)(ce)試有局限性,不能(neng)測(ce)(ce)試多點(dian)接地故(gu)(gu)(gu)障(zhang),也(ye)不能(neng)測(ce)(ce)試三相電(dian)(dian)(dian)纜(lan)(lan)鏈式接地連線(xian)的(de)(de)故(gu)(gu)(gu)障(zhang)。本(ben)儀(yi)(yi)器(qi)是(shi)針(zhen)對外(wai)(wai)護(hu)(hu)套故(gu)(gu)(gu)障(zhang)的(de)(de)特點(dian),采用壓(ya)降法初(chu)測(ce)(ce)電(dian)(dian)(dian)纜(lan)(lan)外(wai)(wai)護(hu)(hu)套的(de)(de)接地故(gu)(gu)(gu)障(zhang),再用跨步電(dian)(dian)(dian)壓(ya)法精(jing)確查找(zhao)故(gu)(gu)(gu)障(zhang)點(dian)。儀(yi)(yi)器(qi)用于(yu)(yu)交聯電(dian)(dian)(dian)纜(lan)(lan)的(de)(de)外(wai)(wai)護(hu)(hu)套故(gu)(gu)(gu)障(zhang)探測(ce)(ce);也(ye)可用于(yu)(yu)地埋線(xian)和全塑線(xian)(無金(jin)屬護(hu)(hu)層電(dian)(dian)(dian)纜(lan)(lan))故(gu)(gu)(gu)障(zhang)的(de)(de)探測(ce)(ce);還可用作電(dian)(dian)(dian)纜(lan)(lan)外(wai)(wai)護(hu)(hu)套直流泄漏(lou)試驗(yan)。
電力電纜外護套測量儀電壓調節(jie)及工作(zuo)方(fang)式切(qie)換注意(yi)事項:
1、根據將(jiang)要進行的測試類型選擇正確的工(gong)作方式。
進行泄漏(lou)測試將工作方式(shi)撥到“泄漏(lou)測試”;
進(jin)行(xing)外護套故障距離(li)初測將工作方(fang)式撥到(dao)“DC1或DC2、DC3等”;
進行外(wai)護套故障(zhang)定點測(ce)試將工作方(fang)式撥到“AC1或AC2、AC3等”
2、工作(zuo)方式切(qie)換(huan)時,先(xian)斷開(kai)電源(yuan)30秒以上;
3、電壓(ya)(ya)調節可以(yi)控制輸(shu)出電壓(ya)(ya)和輸(shu)出電流的大小幅度,當(dang)升高電壓(ya)(ya)時,在負載一定(ding)的情況(kuang)下,輸(shu)出的電流也會(hui)隨之增大;
4、開機順序:
①按照將要進行(xing)的試驗(yan)進行(xing)連線(xian);
②選擇工作方式;
③將電(dian)壓調節幅度旋鈕逆時針旋到小;
④打(da)開電(dian)源;
⑤逐步升高試驗(yan)電壓。
三(san)、主要技術參數
主 機 電 源(yuan):AC220V±10% 5A;
泄漏試(shi)驗輸出電壓:DC 0∽10KV負極性;
定點(dian)和故障距(ju)離初測輸出電(dian)流:連續、斷續 0∽200mA
體(ti) 積(ji):340×320×260
重 量:10kg
定點儀 靈(ling)敏度(du):0.14V(未(wei)放大)
0.10mV(放(fang)大)
電 源(yuan):3×1.5V
重(zhong) 量:0.5公斤
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