電(dian)(dian)(dian)力(li)系(xi)統(tong)(tong)許(xu)多大電(dian)(dian)(dian)流(liu)電(dian)(dian)(dian)氣(qi)設備在預防性(xing)試驗(yan)(yan)和交接試驗(yan)(yan)中(zhong)需(xu)要(yao)準確測(ce)量(liang)回路(lu)(lu)(lu)的(de)電(dian)(dian)(dian)阻(zu)值。斷路(lu)(lu)(lu)器(qi)是電(dian)(dian)(dian)力(li)系(xi)統(tong)(tong)重要(yao)的(de)電(dian)(dian)(dian)氣(qi)設備，國標GB763、GB50150和電(dian)(dian)(dian)力(li)行業標準DL/T596對(dui)斷路(lu)(lu)(lu)器(qi)導電(dian)(dian)(dian)回路(lu)(lu)(lu)電(dian)(dian)(dian)阻(zu)的(de)測(ce)量(liang)均作(zuo)了規(gui)定：應(ying)采用直流(liu)壓降法測(ce)量(liang)，電(dian)(dian)(dian)流(liu)不小于100A。試驗(yan)(yan)變壓器(qi)，直流(liu)高壓發(fa)生器(qi)，工頻(pin)耐壓試驗(yan)(yan)裝置廣泛應(ying)用于電(dian)(dian)(dian)力(li)系(xi)統(tong)(tong)及電(dian)(dian)(dian)氣(qi)、電(dian)(dian)(dian)子設備制造部門。 上海勝緒電(dian)(dian)(dian)氣(qi)有(you)限公司(si)專(zhuan)業生產(chan)銷(xiao)售試驗(yan)(yan)變壓器(qi)，直流(liu)高壓發(fa)生器(qi)，工頻(pin)耐壓試驗(yan)(yan)裝置等(deng)產(chan)品(pin),公司(si)具有(you)良好的(de)市場信(xin)譽,專(zhuan)業的(de)銷(xiao)售和技術服務團隊。  

        斷路(lu)器(qi)導電(dian)回(hui)路(lu)的(de)(de)電(dian)阻(zu)主要(yao)(yao)取決(jue)于斷路(lu)器(qi)的(de)(de)動、靜(jing)觸頭間(jian)的(de)(de)接觸電(dian)阻(zu)。接觸電(dian)阻(zu)的(de)(de)存在(zai)，增加(jia)了導體(ti)在(zai)通電(dian)時(shi)(shi)的(de)(de)損耗(hao)，使接觸處的(de)(de)溫度升高，其值(zhi)的(de)(de)大小直接影響(xiang)(xiang)正 常工作時(shi)(shi)的(de)(de)載(zai)流(liu)(liu)能力，在(zai)一定程度上影響(xiang)(xiang)短路(lu)電(dian)流(liu)(liu)的(de)(de)切(qie)斷能力。因此，斷路(lu)器(qi)每(mei)相導電(dian)回(hui)路(lu)電(dian)阻(zu)值(zhi)是斷路(lu)器(qi)安裝、檢修(xiu)和質量驗收的(de)(de)一項(xiang)重(zhong)要(yao)(yao)數據。

      接(jie)觸電(dian)(dian)(dian)阻的(de)(de)測量(liang)(liang)有許多(duo)種方(fang)法(fa)。日本學者Isao   Minowa提出用(yong)(yong)超(chao)導量(liang)(liang)子器(qi)件測量(liang)(liang)接(jie)觸電(dian)(dian)(dian)阻，H.Archi提出利用(yong)(yong)電(dian)(dian)(dian)解(jie)槽法(fa)測量(liang)(liang)接(jie)觸電(dian)(dian)(dian)阻，波蘭學者Jerzy   Kaczarek提出用(yong)(yong)三(san)次諧波法(fa)測量(liang)(liang)接(jie)觸電(dian)(dian)(dian)阻，這些方(fang)法(fa)一(yi)般(ban)是在(zai)實驗(yan)室(shi)條(tiao)件下(xia)進行電(dian)(dian)(dian)接(jie)觸研究所采用(yong)(yong)的(de)(de)方(fang)法(fa)。工程中，通(tong)常采用(yong)(yong)四端子法(fa)來測量(liang)(liang)實際(ji)觸點的(de)(de)接(jie) 觸電(dian)(dian)(dian)阻。

        以前，通常采用直(zhi)流(liu)雙臂(bei)(bei)電(dian)(dian)(dian)(dian)(dian)(dian)橋測量(liang)斷(duan)(duan)路器(qi)的(de)(de)接觸電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)。但(dan)是，當使用雙臂(bei)(bei)電(dian)(dian)(dian)(dian)(dian)(dian)橋進(jin)行斷(duan)(duan)路器(qi)導電(dian)(dian)(dian)(dian)(dian)(dian)回路電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)的(de)(de)測量(liang)時，由于雙臂(bei)(bei)電(dian)(dian)(dian)(dian)(dian)(dian)橋測量(liang)回路通過(guo)的(de)(de)是微弱的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，難以 消除(chu)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)較大(da)的(de)(de)氧化膜，測出的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)示(shi)值(zhi)偏大(da)，但(dan)氧化膜在大(da)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)下很(hen)容易被擊穿(chuan)，不妨(fang)礙正常電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)通過(guo)。因此，測試采用直(zhi)流(liu)壓降法(fa)測試時，電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)不得太小。

 
       上海勝緒電氣(qi)有(you)限(xian)公司自(zi)產自(zi)銷的HL回路電阻(zu)(zu)測試(shi)儀(yi)具有(you)體積小、重量(liang)輕(qing)、抗干擾能(neng)(neng)力(li)強、精度高(gao)、操作方便、保護功能(neng)(neng)完(wan)善等特點。測量(liang)準確、性能(neng)(neng)穩定，符合電力(li)、供電部門現場(chang)高(gao)壓(ya)開關維修和(he)高(gao)壓(ya)開關廠回路電阻(zu)(zu)測試(shi)的要求。