HDQ-15 高壓電橋電纜故障測試儀

HDQ-15 高壓電橋電纜故障測試儀

HDQ-15高壓電橋電纜故障測試儀

HDQ-15高(gao)(gao)(gao)壓(ya)(ya)電(dian)(dian)(dian)橋(qiao)電(dian)(dian)(dian)纜(lan)故(gu)障測試(shi)儀(yi)基(ji)于(yu)(yu)MURRAY電(dian)(dian)(dian)橋(qiao)原理而設(she)計(ji)，適用(yong)于(yu)(yu)敷設(she)后各種電(dian)(dian)(dian)線電(dian)(dian)(dian)纜(lan)的(de)(de)(de)擊(ji)穿點(dian)（低(di)(di)阻(zu)(zu)、高(gao)(gao)(gao)阻(zu)(zu)及閃絡型(xing)擊(ji)穿）及沒有擊(ji)穿但絕(jue)緣(yuan)電(dian)(dian)(dian)阻(zu)(zu)偏低(di)(di)點(dian)的(de)(de)(de)定(ding)(ding)(ding)(ding)位(wei)(wei)(wei)(wei)(wei)：如(ru)用(yong)兆歐表發現電(dian)(dian)(dian)纜(lan)阻(zu)(zu)值較低(di)(di)，但運行電(dian)(dian)(dian)壓(ya)(ya)下不擊(ji)穿的(de)(de)(de)絕(jue)緣(yuan)缺陷(xian)點(dian)。當然，也可用(yong)于(yu)(yu)電(dian)(dian)(dian)纜(lan)廠內(nei)各種線纜(lan)的(de)(de)(de)缺陷(xian)點(dian)定(ding)(ding)(ding)(ding)位(wei)(wei)(wei)(wei)(wei)。粗測電(dian)(dian)(dian)纜(lan)故(gu)障定(ding)(ding)(ding)(ding)位(wei)(wei)(wei)(wei)(wei)方法(fa)(fa)(fa)有電(dian)(dian)(dian)橋(qiao)法(fa)(fa)(fa)及波反(fan)射(she)法(fa)(fa)(fa)二種。目(mu)前(qian)波反(fan)射(she)法(fa)(fa)(fa)定(ding)(ding)(ding)(ding)位(wei)(wei)(wei)(wei)(wei)儀(yi)較普及。其缺點(dian)為：部分(fen)儀(yi)器現場(chang)連線復雜，有定(ding)(ding)(ding)(ding)位(wei)(wei)(wei)(wei)(wei)盲(mang)區。波形(xing)不典型(xing)時，要求定(ding)(ding)(ding)(ding)位(wei)(wei)(wei)(wei)(wei)人員熟練(lian)掌握儀(yi)器，并富有經驗才能分(fen)辯脈沖波形(xing)。有幾種電(dian)(dian)(dian)纜(lan)故(gu)障很難(nan)用(yong)波反(fan)射(she)法(fa)(fa)(fa)查找：如(ru)，高(gao)(gao)(gao)壓(ya)(ya)電(dian)(dian)(dian)纜(lan)護套絕(jue)緣(yuan)缺陷(xian)點(dian)，鋼帶鎧(kai)裝低(di)(di)壓(ya)(ya)力纜(lan)，PVC 電(dian)(dian)(dian)纜(lan)，沒有反(fan)射(she)波，無(wu)法(fa)(fa)(fa)定(ding)(ding)(ding)(ding)位(wei)(wei)(wei)(wei)(wei)。短電(dian)(dian)(dian)纜(lan)，無(wu)法(fa)(fa)(fa)定(ding)(ding)(ding)(ding)位(wei)(wei)(wei)(wei)(wei)。一些(xie)高(gao)(gao)(gao)阻(zu)(zu)擊(ji)穿點(dian)，在沖擊(ji)電(dian)(dian)(dian)壓(ya)(ya)下無(wu)法(fa)(fa)(fa)擊(ji)穿，也難(nan)以定(ding)(ding)(ding)(ding)位(wei)(wei)(wei)(wei)(wei)。HDQ-15高(gao)(gao)(gao)壓(ya)(ya)電(dian)(dian)(dian)橋(qiao)電(dian)(dian)(dian)纜(lan)故(gu)障測試(shi)儀(yi)內(nei)含高(gao)(gao)(gao)頻(pin)高(gao)(gao)(gao)壓(ya)(ya)恒(heng)流源(yuan)，解決了(le)電(dian)(dian)(dian)源(yuan)對電(dian)(dian)(dian)橋(qiao)高(gao)(gao)(gao)靈敏放(fang)大的(de)(de)(de)干擾難(nan)題，電(dian)(dian)(dian)源(yuan)與電(dian)(dian)(dian)橋(qiao)合為一體。測量(liang)電(dian)(dian)(dian)纜(lan)為的(de)(de)(de)高(gao)(gao)(gao)壓(ya)(ya)電(dian)(dian)(dian)纜(lan)，采用(yong)四端法(fa)(fa)(fa)電(dian)(dian)(dian)阻(zu)(zu)測量(liang)原理，定(ding)(ding)(ding)(ding)位(wei)(wei)(wei)(wei)(wei)精度高(gao)(gao)(gao)。電(dian)(dian)(dian)橋(qiao)置于(yu)(yu)高(gao)(gao)(gao)壓(ya)(ya)側，而操作鈕安(an)全接(jie)地。*解決了(le)電(dian)(dian)(dian)橋(qiao)法(fa)(fa)(fa)用(yong)于(yu)(yu)高(gao)(gao)(gao)阻(zu)(zu)定(ding)(ding)(ding)(ding)位(wei)(wei)(wei)(wei)(wei)的(de)(de)(de)局限性，使電(dian)(dian)(dian)橋(qiao)法(fa)(fa)(fa)無(wu)盲(mang)區、、方便(bian)的(de)(de)(de)特點(dian)得以發揮。
與波反射法相比，HDQ-15高(gao)壓(ya)電(dian)橋電(dian)纜(lan)故障測試儀(yi)特(te)別適用于：
1．敷(fu)設后電(dian)纜的(de)高阻(zu)擊(ji)穿點，特別是(shi)難以燒成低阻(zu)的(de)線(xian)性高阻(zu)擊(ji)穿點，如(ru)電(dian)纜中間(jian)接頭的(de)線(xian)性高阻(zu)擊(ji)穿（這(zhe)種主要是(shi)由于電(dian)纜接頭制作工藝不過關造成的(de)。施加(jia)高壓時只泄露(lu)爬弧(hu)不擊(ji)穿放電(dian)）。
2． 高壓電(dian)(dian)橋平衡法沒有(you)測試盲區，用于判斷短電(dian)(dian)纜(lan)(lan)及靠近電(dian)(dian)纜(lan)(lan)端頭的擊穿點。
3． 高(gao)壓電(dian)橋法僅僅要(yao)求電(dian)纜(lan)相線電(dian)阻的均勻性即可(ke)進行(xing)測量。而行(xing)波(bo)傳輸特(te)性不好(hao)的電(dian)纜(lan)，如介質(zhi)損耗很大(da)的PVC低壓電(dian)纜(lan)；


HDQ-15高壓電橋電纜故障測試儀　產品(pin)特點

◎設備采用(yong)高(gao)(gao)頻高(gao)(gao)壓(ya)開關電源構成高(gao)(gao)壓(ya)恒流(liu)源，電壓(ya)高(gao)(gao)，電流(liu)穩定(ding)，體積小(xiao)，重量輕。
◎采用高靈敏度放大(da)器(qi)及檢(jian)流計指示平(ping)(ping)衡，與比例電(dian)位(wei)器(qi)構(gou)成平(ping)(ping)衡電(dian)橋，整(zheng)體(ti)置于高電(dian)位(wei)。面板上的操(cao)作鈕處于低電(dian)位(wei)，通(tong)過絕緣桿操(cao)作電(dian)橋。
◎特別設計的雙(shuang)芯高壓橡皮測量(liang)電纜，銅(tong)網(wang)編織屏蔽(bi)層可靠(kao)接地, 使用安全。四端(duan)電阻(zu)測量(liang)法避免了引線電阻(zu)引入的誤差。 
◎高(gao)壓恒流源和電(dian)橋集(ji)成在一個(ge)便(bian)攜式(shi)鋁合金箱內。設備(bei)電(dian)壓高(gao)、重量輕、操作(zuo)方便(bian)。
◎與波反射法相比，電橋平衡(heng)法沒有(you)盲區，特別適用于判(pan)斷(duan)短(duan)電纜及靠近端頭(tou)的擊(ji)穿點，操作容易(yi)。
技(ji)術指(zhi)標(biao)
空載電壓：15kV
短路電流：30mA
燒穿功(gong)率(lv)：250W
定位比例精度： ±（0.2%·L+1）m
重量：10kg
體積(ji)：48 cm×46 cm×37 cm
工作電(dian)源：工頻(pin)220V±10%