高压电缆故障测试仪在使用时一定要注意这些事
浏览次数：620发布日期：2021-10-23
高压电缆故障测试仪的(de)注意事项如下(xia)：
1）首先需要列(lie)清楚(chu)故障(zhang)(zhang)(zhang)可能(neng)产(chan)生(sheng)(sheng)的原因及(ji)电(dian)(dian)缆(lan)(lan)(lan)的基本情况(kuang)，例如是(shi)(shi)运行产(chan)生(sheng)(sheng)故障(zhang)(zhang)(zhang)还是(shi)(shi)预(yu)试产(chan)生(sheng)(sheng)故障(zhang)(zhang)(zhang)，是(shi)(shi)新电(dian)(dian)缆(lan)(lan)(lan)还是(shi)(shi)运行时间(jian)很长的电(dian)(dian)缆(lan)(lan)(lan)，电(dian)(dian)缆(lan)(lan)(lan)的大概长度，电(dian)(dian)缆(lan)(lan)(lan)中间(jian)有(you)(you)(you)没有(you)(you)(you)接头，电(dian)(dian)缆(lan)(lan)(lan)以前(qian)有(you)(you)(you)没有(you)(you)(you)出现过(guo)故障(zhang)(zhang)(zhang)，电(dian)(dian)缆(lan)(lan)(lan)是(shi)(shi)直埋还是(shi)(shi)在电(dian)(dian)缆(lan)(lan)(lan)沟铺设，以及(ji)电(dian)(dian)缆(lan)(lan)(lan)类型等等。
2）一定要(yao)确保电(dian)(dian)缆在无电(dian)(dian)的状态下(xia)才进(jin)行检测(ce)，电(dian)(dian)缆故障(zhang)测(ce)试(shi)仪(yi)电(dian)(dian)缆两(liang)端必须与其它(ta)线路断开，确保电(dian)(dian)缆无电(dian)(dian)，电(dian)(dian)缆周围环境处于(yu)安全(quan)状态。
3）测试(shi)人员必须(xu)注(zhu)意(yi)操作安全，每次与电(dian)缆(lan)(lan)接(jie)(jie)(jie)线(xian)(xian)(xian)前(qian)，将电(dian)缆(lan)(lan)各(ge)相(xiang)线(xian)(xian)(xian)与地用短(duan)路线(xian)(xian)(xian)连接(jie)(jie)(jie)放电(dian)，放电(dian)时必须(xu)先将短(duan)路线(xian)(xian)(xian)一端接(jie)(jie)(jie)地，另(ling)一端分别(bie)接(jie)(jie)(jie)电(dian)缆(lan)(lan)各(ge)相(xiang)线(xian)(xian)(xian)放电(dian)。对于其它电(dian)器，例如电(dian)容(rong)器，试(shi)验变压器等，接(jie)(jie)(jie)线(xian)(xian)(xian)及去掉连接(jie)(jie)(jie)线(xian)(xian)(xian)前(qian)也要注(zhu)意(yi)先放电(dian)，后接(jie)(jie)(jie)线(xian)(xian)(xian)。总之，要形成操作习(xi)惯，不怕麻烦，每次操作前(qian)，先注(zhu)意(yi)操作电(dian)器有无与电(dian)路连接(jie)(jie)(jie)，先放电(dian)再操作。
4）电(dian)(dian)缆(lan)(lan)故(gu)(gu)障(zhang)(zhang)测(ce)(ce)(ce)(ce)(ce)试仪(yi)在(zai)测(ce)(ce)(ce)(ce)(ce)试时，先用(yong)闪测(ce)(ce)(ce)(ce)(ce)仪(yi)低压脉冲功能，对(dui)电(dian)(dian)缆(lan)(lan)各(ge)相(xiang)分别进(jin)行全长测(ce)(ce)(ce)(ce)(ce)试，看三相(xiang)对(dui)测(ce)(ce)(ce)(ce)(ce)试时，测(ce)(ce)(ce)(ce)(ce)试波形(xing)(xing)是否一致(zhi)。对(dui)大(da)部分高(gao)阻故(gu)(gu)障(zhang)(zhang)，各(ge)相(xiang)测(ce)(ce)(ce)(ce)(ce)试波形(xing)(xing)是一致(zhi)的(de)(de)。对(dui)低阻故(gu)(gu)障(zhang)(zhang)以及存在(zai)断相(xiang)故(gu)(gu)障(zhang)(zhang)的(de)(de)高(gao)阻故(gu)(gu)障(zhang)(zhang)，故(gu)(gu)障(zhang)(zhang)相(xiang)测(ce)(ce)(ce)(ce)(ce)试波形(xing)(xing)与测(ce)(ce)(ce)(ce)(ce)试的(de)(de)电(dian)(dian)缆(lan)(lan)全长就不一致(zhi)，这样(yang)就可以直(zhi)接用(yong)低压脉冲测(ce)(ce)(ce)(ce)(ce)试出故(gu)(gu)障(zhang)(zhang)距离(li)。
5）用(yong)(yong)高(gao)压(ya)闪络法测试(shi)时(shi)，不管(guan)电缆(lan)故(gu)障(zhang)(zhang)是(shi)高(gao)阻(zu)故(gu)障(zhang)(zhang)，还是(shi)低阻(zu)故(gu)障(zhang)(zhang)，均可用(yong)(yong)高(gao)压(ya)冲(chong)闪法进行测试(shi)。对于(yu)用(yong)(yong)低压(ya)脉冲(chong)能(neng)够直(zhi)接(jie)测试(shi)出故(gu)障(zhang)(zhang)距(ju)离(li)的低阻(zu)或(huo)断线故(gu)障(zhang)(zhang)，一般(ban)也要用(yong)(yong)高(gao)压(ya)冲(chong)闪进行验证测试(shi)及故(gu)障(zhang)(zhang)点(dian)的精(jing)确定点(dian)。
电(dian)缆(lan)故障测(ce)试(shi)仪(yi)高(gao)压闪络法(fa)测(ce)试(shi)时，要注意(yi)，不(bu)管(guan)电(dian)缆(lan)是单相故障还(hai)是多相有(you)故障，对一(yi)根故障相测(ce)试(shi)时，其(qi)它(ta)的电(dian)缆(lan)相线要与(yu)电(dian)缆(lan)短路，以(yi)减少其(qi)它(ta)电(dian)缆(lan)的干扰，提(ti)高(gao)测(ce)试(shi)精度。
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