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XHGG521高(gao)壓(ya)電(dian)(dian)纜(lan)外護套故障測(ce)試儀是基于MURRAY電(dian)(dian)橋原理而設(she)計的，可用于敷設(she)后(hou)各種(zhong)電(dian)(dian)線電(dian)(dian)纜(lan)的擊穿(chuan)點(dian)及沒有擊穿(chuan)但絕緣電(dian)(dian)阻值偏低的缺陷點(dian)的定(ding)位。

XHGG521高(gao)壓電(dian)(dian)(dian)(dian)纜(lan)外(wai)護套故障(zhang)測試儀，采(cai)(cai)用(yong)開關電(dian)(dian)(dian)(dian)源(yuan)構成(cheng)高(gao)壓恒流源(yuan)，空(kong)載電(dian)(dian)(dian)(dian)壓7500V，短路電(dian)(dian)(dian)(dian)流40mA，采(cai)(cai)用(yong)高(gao)靈敏度(du)放大器(qi)及(ji)檢(jian)流計指示平(ping)衡(heng)，與比例電(dian)(dian)(dian)(dian)位器(qi)構成(cheng)平(ping)衡(heng)電(dian)(dian)(dian)(dian)橋(qiao)(qiao)，整體(ti)置于(yu)高(gao)電(dian)(dian)(dian)(dian)位，測量(liang)電(dian)(dian)(dian)(dian)纜(lan)為(wei)雙芯高(gao)壓橡皮電(dian)(dian)(dian)(dian)纜(lan)，用(yong)四端電(dian)(dian)(dian)(dian)阻測量(liang)法避免(mian)了引線電(dian)(dian)(dian)(dian)阻引入的(de)誤差，電(dian)(dian)(dian)(dian)纜(lan)通過編織屏蔽層(ceng)可靠接(jie)地,面板上的(de)操(cao)作鈕(niu)處于(yu)低電(dian)(dian)(dian)(dian)位，通過絕緣(yuan)桿操(cao)作電(dian)(dian)(dian)(dian)橋(qiao)(qiao)。高(gao)壓恒流源(yuan)和電(dian)(dian)(dian)(dian)橋(qiao)(qiao)集成(cheng)在一個便(bian)(bian)攜式鋁(lv)合金箱內。因此，該設備電(dian)(dian)(dian)(dian)壓高(gao)、重量(liang)輕、操(cao)作方(fang)便(bian)(bian)。

1．空載電壓    ≥7500V
2．短路電流    ≥40mA
3．定位比例精度±（0.2%?L±1）米
4．重量         3.5kg
5．工作(zuo)電源(yuan)：   220V

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