電纜(lan)在耐壓測驗中，咱(zan)們(men)都是以為漏電流越(yue)(yue)小(xiao)越(yue)(yue)好，因而許(xu)多的(de)操作者都沒有對下限電流進行設定(ding)(ding)（一般出廠值(zhi)設定(ding)(ding)為零），假如呈現(xian)上(shang)述(shu)的(de)狀況，就(jiu)存在誤(wu)判的(de)也許(xu)，這時合(he)理地設定(ding)(ding)下限就(jiu)能處理此種狀況的(de)發作。在耐壓測試(shi)儀不連接被測物的(de)狀況下進行空測，此刻有一個很小(xiao)的(de)虛電流，咱(zan)們(men)只需將下限電流設定(ding)(ding)為較空測電流值(zhi)稍高就(jiu)可以了。
當測驗回路呈現開路（如操作人員未能連接好被測物或是測驗線短裂等狀況），因為漏電流值小于下限設定，此刻耐壓測試儀就會呈現聲音的提示。那么咱們就要檢查一下是不是測驗線或是連接上呈現開路的狀況，然后保證測驗的有效性。
電纜工頻交流耐壓試驗裝置在作絕緣阻抗測驗中，也相同存在這么的疑問。關于一般而言，總是以為絕緣電阻越大越符合要求，但假如相同呈現耐壓測試儀與被測物之間開路的景象，那么也會存在相同的誤判景象。這時咱們就可以通過設定絕緣阻抗上限值來防止這種狀況的發作。
由電動(dong)調(diao)壓(ya)器(qi)和(he)高(gao)壓(ya)試驗變壓(ya)器(qi)產生(sheng)的(de)0～30KV的(de)高(gao)壓(ya)作(zuo)為(wei)正極施加于試件上，根據預(yu)先設(she)定的(de)測試電壓(ya)對實際電壓(ya)進行調(diao)節(jie)，使測試電壓(ya)和(he)實際電壓(ya)相同。
這時(shi)(shi)將一(yi)路(lu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)信號(hao)和多(duo)達6路(lu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)信號(hao)通(tong)過遠程通(tong)訊電(dian)(dian)(dian)(dian)(dian)(dian)纜傳(chuan)送至(zhi)數據(ju)處理(li)裝(zhuang)置(zhi)，數據(ju)處理(li)裝(zhuang)置(zhi)對(dui)信號(hao)進行采集，放大(da)及轉換，并對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)信號(hao)與額定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)進行比較，根據(ju)不(bu)同(tong)情(qing)況(kuang)，電(dian)(dian)(dian)(dian)(dian)(dian)纜工頻交(jiao)流(liu)耐壓(ya)(ya)(ya)(ya)試(shi)(shi)驗裝(zhuang)置(zhi)啟動降壓(ya)(ya)(ya)(ya)與升壓(ya)(ya)(ya)(ya)繼電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)，同(tong)時(shi)(shi)它(ta)還監(jian)測(ce)(ce)六(liu)路(lu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的大(da)小，如果六(liu)路(lu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)中(zhong)任一(yi)路(lu)的泄漏電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)超過額定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，則微電(dian)(dian)(dian)(dian)(dian)(dian)腦(nao)啟動故障繼電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)對(dui)應(ying)回路(lu)的指示燈亮，高壓(ya)(ya)(ya)(ya)測(ce)(ce)量(liang)裝(zhuang)置(zhi)也發出聲。如果六(liu)路(lu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)都(dou)正常，則試(shi)(shi)驗時(shi)(shi)間結束后(hou)，測(ce)(ce)試(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)降至(zhi)零，可能要求打印出測(ce)(ce)試(shi)(shi)報告。絕緣靴(xue)手套耐壓(ya)(ya)(ya)(ya)測(ce)(ce)試(shi)(shi)儀可同(tong)時(shi)(shi)測(ce)(ce)量(liang)6個(ge)被試(shi)(shi)品(pin)技(ji)術！
