HLY-II回路電阻測試儀說明書

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一、概述

目(mu)前，電(dian)(dian)(dian)(dian)力系統中普遍彩(cai)常(chang)規(gui)的(de)(de)(de)QJ44型(xing)雙(shuang)臂直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)橋測(ce)(ce)量(liang)高壓(ya)斷(duan)路器的(de)(de)(de)接觸電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)，而這類(lei)電(dian)(dian)(dian)(dian)橋的(de)(de)(de)測(ce)(ce)試(shi)電(dian)(dian)(dian)(dian)流(liu)僅為毫安級(ji)，在(zai)測(ce)(ce)量(liang)高壓(ya)開頭(tou)導電(dian)(dian)(dian)(dian)回路接觸電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)時(shi)，由于(yu)受到油膜和(he)動(dong)靜觸頭(tou)間氧(yang)化(hua)層的(de)(de)(de)影響，測(ce)(ce)量(liang)值(zhi)偏大(da)(da)若干倍，掩蓋了(le)真實(shi)的(de)(de)(de)接觸電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)值(zhi)。例(li)如，1993年(nian)2月(yue)8日(ri)，河北邯鄲(dan)電(dian)(dian)(dian)(dian)業局(ju)，在(zai)220KV變(bian)電(dian)(dian)(dian)(dian)站測(ce)(ce)試(shi)220KV開關接觸電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)時(shi)，先使用(yong)了(le)QJ44型(xing)雙(shuang)臂電(dian)(dian)(dian)(dian)橋測(ce)(ce)量(liang)，其中相接觸電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)為1370μΩ,而國家標(biao)準規(gui)定不大(da)(da)于(yu)800μΩ,用(yong)電(dian)(dian)(dian)(dian)容器對(dui)(dui)其充(chong)放電(dian)(dian)(dian)(dian),數值(zhi)忽大(da)(da)忽小(xiao)(xiao),無(wu)法判斷(duan),經使用(yong)100A直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)測(ce)(ce)試(shi)儀(yi),測(ce)(ce)試(shi)結(jie)果為450μΩ.用(yong)該儀(yi)器測(ce)(ce)量(liang)時(shi),由于(yu)大(da)(da)電(dian)(dian)(dian)(dian)流(liu)將觸頭(tou)的(de)(de)(de)油膜及氧(yang)化(hua)層燒掉(diao)而反映出真實(shi)的(de)(de)(de)結(jie)果。因(yin)此(ci)電(dian)(dian)(dian)(dian)力部標(biao)準SD301-88《交流(liu)500KV電(dian)(dian)(dian)(dian)器設備交接和(he)預防性(xing)試(shi)驗(yan)(yan)規(gui)程》和(he)新版《電(dian)(dian)(dian)(dian)器設備預防性(xing)試(shi)驗(yan)(yan)規(gui)程》對(dui)(dui)斷(duan)路器、隔(ge)離開關接觸電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)的(de)(de)(de)測(ce)(ce)量(liang)電(dian)(dian)(dian)(dian)流(liu)做出不小(xiao)(xiao)于(yu)直(zhi)(zhi)流(liu)100A的(de)(de)(de)規(gui)定，以保證(zheng)準確度(du)。

HLY型回(hui)路(lu)電(dian)阻(zu)(zu)測(ce)(ce)試(shi)(shi)儀是采(cai)用(yong)數字電(dian)路(lu)技(ji)術和(he)(he)開關電(dian)路(lu)技(ji)術制(zhi)作，它是用(yong)于(yu)開關控制(zhi)設(she)備的(de)(de)接(jie)觸電(dian)阻(zu)(zu)、回(hui)路(lu)電(dian)阻(zu)(zu)測(ce)(ce)量的(de)(de)專用(yong)設(she)備，其測(ce)(ce)試(shi)(shi)電(dian)流采(cai)用(yong)國家標準GB736推薦的(de)(de)100A直流，可在100A電(dian)流的(de)(de)情況下直接(jie)測(ce)(ce)得(de)回(hui)路(lu)電(dian)阻(zu)(zu)或者接(jie)觸電(dian)阻(zu)(zu)，并用(yong)數字顯示。該儀器(qi)測(ce)(ce)量準確、性能(neng)穩定，適合(he)電(dian)力、供電(dian)部門現(xian)聲高壓(ya)開關試(shi)(shi)驗維修(xiu)和(he)(he)高壓(ya)開關廠回(hui)路(lu)電(dian)阻(zu)(zu)測(ce)(ce)試(shi)(shi)的(de)(de)要求(qiu)。