GD6300B是(shi)高(gao)、低開關(guan)(guan)、電(dian)(dian)(dian)(dian)纜電(dian)(dian)(dian)(dian)線(xian)(xian)及(ji)焊縫接觸電(dian)(dian)(dian)(dian)阻的(de)(de)專用(yong)測(ce)試(shi)儀器(qi)。其(qi)電(dian)(dian)(dian)(dian)流采用(yong)標(biao)準GB736所(suo)推薦的(de)(de)標(biao)準直流，可(ke)在(zai)標(biao)準電(dian)(dian)(dian)(dian)流的(de)(de)情況下測(ce)得被試(shi)品的(de)(de)電(dian)(dian)(dian)(dian)阻值高(gao)壓(ya)開關(guan)(guan)設(she)備(bei)(bei)主要是(shi)用(yong)于關(guan)(guan)合及(ji)開斷(duan)電(dian)(dian)(dian)(dian)力線(xian)(xian)路(lu)(lu),以(yi)切(qie)(qie)(qie)換(huan)電(dian)(dian)(dian)(dian)力負荷,以(yi)及(ji)從(cong)電(dian)(dian)(dian)(dian)力系(xi)統(tong)中退出(chu)故(gu)(gu)障(zhang)線(xian)(xian)段,以(yi)保(bao)證系(xi)統(tong)安(an)全運(yun)行的(de)(de)重要設(she)備(bei)(bei)。在(zai)電(dian)(dian)(dian)(dian)網正常發(fa)送(song)電(dian)(dian)(dian)(dian)時(shi),高(gao)壓(ya)開關(guan)(guan)是(shi)一個(ge)固定的(de)(de)靜(jing)止設(she)備(bei)(bei),而(er)在(zai)電(dian)(dian)(dian)(dian)網需要改變送(song)電(dian)(dian)(dian)(dian)路(lu)(lu)徑或出(chu)現(xian)故(gu)(gu)障(zhang)時(shi),它將作為切(qie)(qie)(qie)斷(duan)線(xian)(xian)路(lu)(lu)及(ji)切(qie)(qie)(qie)除故(gu)(gu)障(zhang)點的(de)(de)設(she)備(bei)(bei),所(suo)以(yi)它是(shi)一種長期靜(jing)態(tai)運(yun)行而(er)需要動作時(shi)快速(su)響應的(de)(de)保(bao)護性設(she)備(bei)(bei)。它若出(chu)現(xian)故(gu)(gu)障(zhang)就不(bu)能完成(cheng)其(qi)切(qie)(qie)(qie)換(huan)線(xian)(xian)路(lu)(lu)和保(bao)護系(xi)統(tong)的(de)(de)功能。

因此,對高壓開關(guan)機械特性(xing)(xing)測試儀設備(bei)(bei)進行狀(zhuang)態檢測和(he)故(gu)(gu)障(zhang)(zhang)診斷十分重要。及時的(de)狀(zhuang)態檢測、故(gu)(gu)障(zhang)(zhang)分析、性(xing)(xing)能評估將(jiang)保(bao)證高壓開關(guan)設備(bei)(bei)發揮(hui)最大的(de)設計(ji)能力,制(zhi)定(ding)合理(li)的(de)檢測維(wei)修制(zhi)度,以在允許的(de)條件下充分挖掘(jue)開關(guan)設備(bei)(bei)潛(qian)力,延長使用壽(shou)命,降低開關(guan)設備(bei)(bei)全壽(shou)命周期費用,提高開關(guan)設備(bei)(bei)運(yun)行的(de)可靠性(xing)(xing)、安全性(xing)(xing)和(he)有效性(xing)(xing),把(ba)故(gu)(gu)障(zhang)(zhang)損失(shi)降低到(dao)水平。

斷(duan)(duan)路(lu)(lu)器是一種典(dian)型的(de)(de)高壓開關設備(bei)。斷(duan)(duan)路(lu)(lu)器導電(dian)(dian)回路(lu)(lu)的(de)(de)電(dian)(dian)阻主(zhu)要取決于斷(duan)(duan)路(lu)(lu)器動、靜觸頭(tou)間(jian)的(de)(de)接觸電(dian)(dian)阻,接觸電(dian)(dian)阻的(de)(de)大小與(yu)斷(duan)(duan)路(lu)(lu)器觸頭(tou)表面(mian)氧化(hua)程度、觸頭(tou)間(jian)殘(can)存機(ji)械雜物(wu)或碳化(hua)物(wu)的(de)(de)多少,觸頭(tou)接觸壓力的(de)(de)大小等有(you)關。接觸電(dian)(dian)阻的(de)(de)大小直接影響到斷(duan)(duan)路(lu)(lu)器通載額定工作電(dian)(dian)流的(de)(de)溫升以(yi)及短(duan)路(lu)(lu)狀(zhuang)態下的(de)(de)開斷(duan)(duan)能力。

長期工(gong)(gong)(gong)作的(de)(de)開關觸頭(tou)表面受到化(hua)學的(de)(de)或電(dian)(dian)(dian)化(hua)學的(de)(de)腐蝕,接(jie)觸電(dian)(dian)(dian)阻(zu)會逐(zhu)漸(jian)變大,通以較(jiao)大工(gong)(gong)(gong)作電(dian)(dian)(dian)流時(shi)(shi),觸頭(tou)部位(wei)的(de)(de)發熱量增加(jia),造成溫升過高,嚴重時(shi)(shi)波(bo)及觸頭(tou)彈簧變形(xing),造成觸頭(tou)壓力減少(shao),接(jie)觸電(dian)(dian)(dian)阻(zu)進一步變大的(de)(de)惡性(xing)循環,以致燒壞觸頭(tou)或短路(lu)條件下的(de)(de)工(gong)(gong)(gong)作不正常。

開(kai)關(guan)(guan)導電(dian)(dian)(dian)(dian)(dian)回(hui)(hui)路(lu)(lu)電(dian)(dian)(dian)(dian)(dian)阻是反(fan)映(ying)其質量(liang)的(de)主(zhu)要(yao)(yao)參數(shu),因(yin)此(ci),對(dui)開(kai)關(guan)(guan)導電(dian)(dian)(dian)(dian)(dian)回(hui)(hui)路(lu)(lu)電(dian)(dian)(dian)(dian)(dian)阻進(jin)行測(ce)量(liang)是非常必要(yao)(yao)的(de),是開(kai)關(guan)(guan)檢修和(he)交接試(shi)驗的(de)必作項目(mu)(mu)。目(mu)(mu)前的(de)開(kai)關(guan)(guan)機(ji)械特性測(ce)試(shi)儀測(ce)量(liang)采(cai)用(yong)(yong)的(de)是直(zhi)流電(dian)(dian)(dian)(dian)(dian)壓降法,通(tong)入looA左右的(de)大(da)(da)電(dian)(dian)(dian)(dian)(dian)流,測(ce)量(liang)回(hui)(hui)路(lu)(lu)的(de)壓降。然而,在(zai)大(da)(da)電(dian)(dian)(dian)(dian)(dian)流通(tong)過(guo)時,容易引起觸頭的(de)過(guo)度發熱和(he)加速氧化,回(hui)(hui)路(lu)(lu)電(dian)(dian)(dian)(dian)(dian)阻測(ce)量(liang)值可能引起附加誤差(cha)。常規的(de)大(da)(da)電(dian)(dian)(dian)(dian)(dian)流發生(sheng)器體積較大(da)(da),也(ye)不利于便攜(xie)式(shi)測(ce)量(liang)。因(yin)此(ci),引入智能化技術,采(cai)用(yong)(yong)新的(de)電(dian)(dian)(dian)(dian)(dian)源(yuan)方式(shi)對(dui)改進(jin)開(kai)關(guan)(guan)回(hui)(hui)路(lu)(lu)電(dian)(dian)(dian)(dian)(dian)阻的(de)測(ce)量(liang)有著重(zhong)要(yao)(yao)的(de)現實意(yi)(yi)義。華意(yi)(yi)電(dian)(dian)(dian)(dian)(dian)力的(de)工作旨在(zai)提(ti)出一(yi)(yi)種(zhong)脈沖電(dian)(dian)(dian)(dian)(dian)源(yuan)方式(shi),通(tong)過(guo)智能化的(de)數(shu)據處理,設計一(yi)(yi)種(zhong)實用(yong)(yong)的(de)開(kai)關(guan)(guan)回(hui)(hui)路(lu)(lu)電(dian)(dian)(dian)(dian)(dian)阻測(ce)試(shi)儀。

電(dian)(dian)力是維(wei)系(xi)(xi)社(she)會生存和發展的(de)(de)(de)(de)(de)根本能(neng)源之一,現(xian)代(dai)社(she)會對電(dian)(dian)能(neng)的(de)(de)(de)(de)(de)依賴(lai)日趨增加。電(dian)(dian)力系(xi)(xi)統(tong)的(de)(de)(de)(de)(de)硬件包括(kuo)變壓(ya)器、輸電(dian)(dian)線路(lu)(lu)(lu)和開(kai)關(guan)等(deng)設備。作(zuo)為典型(xing)的(de)(de)(de)(de)(de)開(kai)關(guan)設備,高(gao)壓(ya)斷路(lu)(lu)(lu)器通(tong)常使用(yong)在(zai)3kV及以(yi)上電(dian)(dian)力系(xi)(xi)統(tong)中(zhong),是電(dian)(dian)力系(xi)(xi)統(tong)中(zhong)最重要(yao)的(de)(de)(de)(de)(de)控制(zhi)和保護設備l[]。無論電(dian)(dian)力線路(lu)(lu)(lu)處在(zai)什么狀態,例如(ru)空載(zai)(zai)、負(fu)載(zai)(zai)或短(duan)路(lu)(lu)(lu)故障,當要(yao)求斷路(lu)(lu)(lu)器動作(zuo)時,它都(dou)應該可靠地(di)動作(zuo),關(guan)合(he)(he)或者開(kai)斷電(dian)(dian)路(lu)(lu)(lu)。高(gao)壓(ya)斷路(lu)(lu)(lu)器在(zai)電(dian)(dian)網中(zhong)起著兩方(fang)面的(de)(de)(de)(de)(de)作(zuo)用(yong):第一,控制(zhi)作(zuo)用(yong)。根據(ju)電(dian)(dian)網運(yun)(yun)(yun)(yun)行(xing)需要(yao),用(yong)高(gao)壓(ya)斷路(lu)(lu)(lu)器把一部分(fen)電(dian)(dian)力設備或線路(lu)(lu)(lu)投(tou)入(ru)或退(tui)出運(yun)(yun)(yun)(yun)行(xing)。第二(er),保護作(zuo)用(yong)。高(gao)壓(ya)斷路(lu)(lu)(lu)器可以(yi)在(zai)電(dian)(dian)力線路(lu)(lu)(lu)或設備發生故障時將(jiang)故障部分(fen)從電(dian)(dian)網快速(su)切(qie)除,保證電(dian)(dian)網中(zhong)的(de)(de)(de)(de)(de)*部分(fen)正常運(yun)(yun)(yun)(yun)行(xing)。總之,高(gao)壓(ya)斷路(lu)(lu)(lu)器能(neng)夠開(kai)斷、關(guan)合(he)(he)及承載(zai)(zai)運(yun)(yun)(yun)(yun)行(xing)線路(lu)(lu)(lu)的(de)(de)(de)(de)(de)正常電(dian)(dian)流(liu),也能(neng)在(zai)規(gui)(gui)定時間(jian)內開(kai)斷、關(guan)合(he)(he)及承載(zai)(zai)規(gui)(gui)定的(de)(de)(de)(de)(de)異常電(dian)(dian)流(liu),如(ru)過載(zai)(zai)電(dian)(dian)流(liu)和短(duan)路(lu)(lu)(lu)電(dian)(dian)流(liu)。

由于高壓斷(duan)路(lu)器(qi)在(zai)電(dian)(dian)(dian)網(wang)(wang)中(zhong)是起控制和保(bao)護作用的(de),高壓斷(duan)路(lu)器(qi)發(fa)生故障時(shi)會引起電(dian)(dian)(dian)網(wang)(wang)事故或(huo)擴大事故,造成相當大的(de)經濟及其它方面的(de)損失(shi)。目前,電(dian)(dian)(dian)力系統還在(zai)快速發(fa)展,電(dian)(dian)(dian)能供應的(de)安全可(ke)靠(kao)性(xing)、電(dian)(dian)(dian)能質(zhi)量、經濟性(xing),包括目前電(dian)(dian)(dian)力部門正在(zai)大力推行的(de)變(bian)電(dian)(dian)(dian)站綜合自動(dong)化,都對高壓斷(duan)路(lu)器(qi)的(de)可(ke)靠(kao)性(xing)提(ti)出(chu)了(le)更高的(de)要求(qiu)。

作為電力系(xi)統的(de)(de)(de)核(he)心硬(ying)件之(zhi)一(yi),開(kai)關電器的(de)(de)(de)各(ge)參(can)(can)數指標都將影響其工(gong)作性能(neng)或(huo)運行(xing)可(ke)靠性。高壓開(kai)關機(ji)械特性測試(shi)儀是這(zhe)些電器參(can)(can)數中(zhong)最(zui)重(zhong)要的(de)(de)(de)參(can)(can)數之(zhi)一(yi)。回(hui)路(lu)電阻(zu)如果因某種原因變大的(de)(de)(de)話(hua),將加(jia)大電接(jie)觸部位的(de)(de)(de)溫升,打破原來(lai)的(de)(de)(de)熱平衡。由于導(dao)體溫度的(de)(de)(de)增(zeng)(zeng)加(jia)將帶來(lai)導(dao)電體電阻(zu)率的(de)(de)(de)增(zeng)(zeng)加(jia),將進一(yi)步增(zeng)(zeng)加(jia)發熱,長時間發熱還會引(yin)起(qi)接(jie)觸表面的(de)(de)(de)氧化,引(yin)起(qi)支撐(cheng)絕緣件的(de)(de)(de)軟化或(huo)老化。因此,回(hui)路(lu)電阻(zu)的(de)(de)(de)增(zeng)(zeng)加(jia)可(ke)能(neng)引(yin)起(qi)惡性循環,甚至引(yin)起(qi)接(jie)點(dian)熔焊或(huo)火災。檢(jian)測開(kai)關的(de)(de)(de)回(hui)路(lu)電阻(zu)是開(kai)關入廠檢(jian)驗必檢(jian)項(xiang)目(mu)和日常檢(jian)修的(de)(de)(de)必測項(xiang)目(mu)。