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電力(li)電纜外護套檢(jian)測儀性能:地埋電纜外護套故障(zhang)(zhang)的測尋,同(tong)電力(li)電纜故障(zhang)(zhang)探測一樣,一般要(yao)經(jing)過“初測"和“定點"二(er)個步驟,有時甚至還需要(yao)查找電纜路徑。
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電力電纜外護套檢測儀性能(neng):地(di)埋電(dian)(dian)(dian)纜(lan)外(wai)護(hu)(hu)(hu)套(tao)(tao)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)的測尋,同電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)探測一樣,一般要經過(guo)“初(chu)測”和“定(ding)點”二個步(bu)(bu)驟(zou),有時甚至(zhi)還需要查(cha)找電(dian)(dian)(dian)纜(lan)路徑。外(wai)護(hu)(hu)(hu)套(tao)(tao)接(jie)地(di)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)的初(chu)測(測距(ju))一般采用(yong)(yong)壓降(jiang)法(fa)和電(dian)(dian)(dian)橋法(fa)測試(shi)。由于電(dian)(dian)(dian)橋法(fa)測試(shi)有局限(xian)性,不(bu)能(neng)測試(shi)多點接(jie)地(di)故(gu)(gu)(gu)障(zhang)(zhang)(zhang),也不(bu)能(neng)測試(shi)三(san)相電(dian)(dian)(dian)纜(lan)鏈式接(jie)地(di)連線的故(gu)(gu)(gu)障(zhang)(zhang)(zhang)。本(ben)儀(yi)(yi)器是針對外(wai)護(hu)(hu)(hu)套(tao)(tao)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)的特點,采用(yong)(yong)壓降(jiang)法(fa)初(chu)測電(dian)(dian)(dian)纜(lan)外(wai)護(hu)(hu)(hu)套(tao)(tao)的接(jie)地(di)故(gu)(gu)(gu)障(zhang)(zhang)(zhang),再用(yong)(yong)跨步(bu)(bu)電(dian)(dian)(dian)壓法(fa)精確查(cha)找故(gu)(gu)(gu)障(zhang)(zhang)(zhang)點。儀(yi)(yi)器用(yong)(yong)于交聯(lian)電(dian)(dian)(dian)纜(lan)的外(wai)護(hu)(hu)(hu)套(tao)(tao)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)探測;也可用(yong)(yong)于地(di)埋線和全塑(su)線(無金屬護(hu)(hu)(hu)層(ceng)電(dian)(dian)(dian)纜(lan))故(gu)(gu)(gu)障(zhang)(zhang)(zhang)的探測;還可用(yong)(yong)作(zuo)電(dian)(dian)(dian)纜(lan)外(wai)護(hu)(hu)(hu)套(tao)(tao)直流(liu)泄漏試(shi)驗。
電力電纜外護套檢測儀電壓調節及工作方式切(qie)換注(zhu)意事項:
1、根據將要進行的測(ce)試類型選(xuan)擇正(zheng)確的工作(zuo)方(fang)式。
進行泄(xie)(xie)漏(lou)測試將(jiang)工作方式(shi)撥到“泄(xie)(xie)漏(lou)測試”;
進行(xing)外護套故障距離初測將工作方(fang)式(shi)撥到“DC1或DC2、DC3等(deng)”;
進(jin)行外(wai)護(hu)套故障定點測試將工(gong)作方式撥到(dao)“AC1或AC2、AC3等”
2、工作方(fang)式切換時,先(xian)斷開電(dian)源(yuan)30秒以上;
3、電(dian)(dian)壓(ya)調節可以控制輸(shu)出電(dian)(dian)壓(ya)和輸(shu)出電(dian)(dian)流(liu)的(de)大小幅度(du),當升高電(dian)(dian)壓(ya)時,在(zai)負(fu)載一定的(de)情(qing)況(kuang)下(xia),輸(shu)出的(de)電(dian)(dian)流(liu)也會隨(sui)之(zhi)增大;
4、開機順序:
①按照將要進行的試驗進行連線(xian);
②選(xuan)擇工作方式;
③將電壓調節幅度(du)旋(xuan)鈕逆時針旋(xuan)到(dao)小(xiao);
④打開電源;
⑤逐步升高(gao)試驗電壓(ya)。
三、主要(yao)技術參(can)數
主 機(ji) 電 源:AC220V±10% 5A;
泄(xie)漏試驗輸(shu)出電壓:DC 0∽10KV負極性;
定點和(he)故(gu)障距離(li)初測(ce)輸出電流:連續、斷(duan)續 0∽200mA
體 積(ji):340×320×260
重 量:10kg
定點儀 靈敏(min)度:0.14V(未(wei)放(fang)大)
0.10mV(放大)
電 源:3×1.5V
重 量:0.5公斤
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