使用直流高壓發生器請用戶(hu)必須按《電力安規(gui)》168條規(gui)定，并在(zai)工作電源(yuan)進(jin)入試驗器前加裝兩個明顯(xian)斷(duan)開點(dian)。當更換試品和(he)接線時，應(ying)先將(jiang)兩個電源(yuan)斷(duan)開點(dian)明顯(xian)斷(duan)開。

試(shi)驗前請(qing)檢查(cha)所有(you)試(shi)驗接線(xian)、控制箱、倍壓筒和試(shi)品的接地線(xian)是否接好。試(shi)驗回路(lu)接地線(xian)應按(an)TPZGF系列直流高壓發生器(qi)說明(ming)書所示，一點(dian)安(an)全接地。

對大電(dian)(dian)(dian)(dian)(dian)容試(shi)品(pin)(pin)(pin)的放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)應(ying)用(yong)ZS放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)阻(zu)棒對試(shi)品(pin)(pin)(pin)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)。放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)時不能(neng)將放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)棒立即接觸試(shi)品(pin)(pin)(pin)，應(ying)先(xian)將放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)棒逐漸接近試(shi)品(pin)(pin)(pin)，到一定距(ju)離空氣間隙開始游離放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)，有嘶嘶聲，當無聲音(yin)時可(ke)用(yong)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)棒放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)，后(hou)直(zhi)接接上地線放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)。

直流高(gao)(gao)壓(ya)在200kV及以上時，盡管試(shi)驗人(ren)員(yuan)穿(chuan)絕緣鞋(xie)，且(qie)處在安全距離以外區域，但由于高(gao)(gao)壓(ya)直流離子空間電(dian)(dian)場分布的影響，會使(shi)幾個鄰近站立的人(ren)體(ti)上帶有不(bu)同的直流電(dian)(dian)位。試(shi)驗人(ren)員(yuan)不(bu)要互相握手或用手接(jie)觸(chu)接(jie)地(di)體(ti)等(deng)，否則會有輕(qing)微電(dian)(dian)擊現象(xiang)，此現象(xiang)在干(gan)燥地(di)區和冬季(ji)較為(wei)(wei)明(ming)顯，但由于能量較小，一般不(bu)會對人(ren)體(ti)造(zao)成傷害。ZGF系列直流高(gao)(gao)壓(ya)發生(sheng)器控制箱(xiang)電(dian)(dian)源為(wei)(wei)交流AC220V±10%，50Hz。如果電(dian)(dian)源經(jing)1/1隔離變或現場用自發電(dian)(dian)源，則必須(xu)人(ren)為(wei)(wei)將(jiang)電(dian)(dian)源有一點與大(da)地(di)聯接(jie)。

如何更好(hao)的使用直流(liu)高壓發生器

儀器使用前準備工作

直流高壓(ya)發生器在使用前應檢查其完好(hao)性(xing),聯接(jie)(jie)(jie)(jie)電(dian)(dian)纜(lan)線(xian)不應有斷路(lu)和短路(lu),設(she)備無破(po)裂(lie)等損壞。將機箱、倍(bei)壓(ya)筒放(fang)置(zhi)到合(he)適(shi)的(de)安全的(de)位(wei)置(zhi),分別聯接(jie)(jie)(jie)(jie)好(hao)電(dian)(dian)源線(xian)、電(dian)(dian)纜(lan)線(xian)和接(jie)(jie)(jie)(jie)地(di)(di)線(xian)。保護(hu)接(jie)(jie)(jie)(jie)地(di)(di)線(xian)與工作接(jie)(jie)(jie)(jie)地(di)(di)線(xian)以及放(fang)電(dian)(dian)棒的(de)接(jie)(jie)(jie)(jie)地(di)(di)線(xian)均應單(dan)獨接(jie)(jie)(jie)(jie)到試品的(de)地(di)(di)線(xian)上(即一(yi)(yi)點接(jie)(jie)(jie)(jie)地(di)(di))。嚴(yan)禁各接(jie)(jie)(jie)(jie)地(di)(di)線(xian)相互串聯使用,以免擊(ji)穿(chuan)時地(di)(di)電(dian)(dian)位(wei)抬高形(xing)成反擊(ji),損壞儀器。檢查電(dian)(dian)源開(kai)關是否在關斷的(de)位(wei)置(zhi)上,并檢查調壓(ya)電(dian)(dian)位(wei)器應在零位(wei)上,過(guo)電(dian)(dian)壓(ya)保護(hu)整(zheng)定撥盤開(kai)關設(she)置(zhi)在適(shi)當的(de)位(wei)置(zhi)上,一(yi)(yi)般為1.10～1.20倍(bei)測(ce)試電(dian)(dian)壓(ya)值。

空載升壓(ya)驗證(zheng)過(guo)電壓(ya)保護整定(ding)值(zhi)

請認準電(dian)源是單相交流(liu)(liu)220V,50Hz.接通(tong)電(dian)源開(kai)關(guan)(guan),此時(shi)綠燈亮(liang),表示(shi)電(dian)源接通(tong)。按(an)紅(hong)色(se)按(an)鈕(niu),則紅(hong)燈亮(liang),表示(shi)高壓(ya)接通(tong)。順時(shi)針方向平緩(huan)調(diao)(diao)節調(diao)(diao)壓(ya)電(dian)位器(qi)粗調(diao)(diao)和細(xi)調(diao)(diao),輸(shu)出端即從零開(kai)始升壓(ya)。升到所需的電(dian)壓(ya)后,按(an)規定時(shi)間記錄電(dian)流(liu)(liu)表讀數,并(bing)檢(jian)查控制箱及輸(shu)出電(dian)纜有無異常現象(xiang)及聲(sheng)響。必要時(shi)用外(wai)接高壓(ya)分壓(ya)器(qi)校準控制箱上的直流(liu)(liu)高壓(ya)指示(shi)。降壓(ya),將調(diao)(diao)壓(ya)電(dian)位器(qi)回(hui)零后,隨后按(an)綠色(se)按(an)鈕(niu),切斷高壓(ya)并(bing)關(guan)(guan)閉電(dian)源開(kai)關(guan)(guan)。

對試品進行泄漏及直流耐壓試驗

在做負載試(shi)(shi)驗前,將(jiang)高(gao)(gao)壓(ya)(ya)(ya)(ya)屏蔽(bi)微安表安裝到高(gao)(gao)壓(ya)(ya)(ya)(ya)倍(bei)壓(ya)(ya)(ya)(ya)筒(tong)上的高(gao)(gao)壓(ya)(ya)(ya)(ya)輸出端上,并將(jiang)配(pei)套的屏蔽(bi)線分(fen)別接(jie)到微安表上和被試(shi)(shi)品(pin)上(詳細請見高(gao)(gao)壓(ya)(ya)(ya)(ya)屏蔽(bi)微安表使用說(shuo)明書)。檢查儀器、放電棒、倍(bei)壓(ya)(ya)(ya)(ya)筒(tong)、試(shi)(shi)品(pin)聯接(jie)線、接(jie)地(di)(di)線是否(fou)正確,接(jie)地(di)(di)線聯接(jie)是否(fou)可(ke)靠(kao),檢查高(gao)(gao)壓(ya)(ya)(ya)(ya)安全距離是否(fou)符合要求,方可(ke)開始進行試(shi)(shi)品(pin)的高(gao)(gao)壓(ya)(ya)(ya)(ya)試(shi)(shi)驗。

檢查(cha)確認儀器(qi)等無異常情況后(hou),接(jie)通(tong)單(dan)相交流(liu)(liu)220V電(dian)(dian)源開(kai)(kai)關,此時綠(lv)燈亮,表(biao)(biao)示(shi)電(dian)(dian)源接(jie)通(tong)。可開(kai)(kai)始(shi)進行試(shi)品的(de)直流(liu)(liu)泄漏和直流(liu)(liu)耐壓(ya)(ya)(ya)試(shi)驗。按(an)紅色按(an)鈕(niu),則紅燈亮,表(biao)(biao)示(shi)高壓(ya)(ya)(ya)接(jie)通(tong),待升(sheng)高壓(ya)(ya)(ya)。順時針(zhen)方向平緩(huan)調節(jie)調壓(ya)(ya)(ya)電(dian)(dian)位(wei)器(qi)粗(cu)調和細調,輸出端即從零開(kai)(kai)始(shi)升(sheng)壓(ya)(ya)(ya)。升(sheng)壓(ya)(ya)(ya)速度以(yi)每秒3-5kV上升(sheng)試(shi)驗電(dian)(dian)壓(ya)(ya)(ya)為(wei)宜。對于大電(dian)(dian)容試(shi)品升(sheng)壓(ya)(ya)(ya)時更要緩(huan)慢升(sheng)壓(ya)(ya)(ya),否則可能(neng)導致電(dian)(dian)壓(ya)(ya)(ya)過(guo)沖(chong),還需監視(shi)電(dian)(dian)流(liu)(liu)表(biao)(biao)充(chong)電(dian)(dian)電(dian)(dian)流(liu)(liu)不超過(guo)直流(liu)(liu)發生器(qi)的(de)大充(chong)電(dian)(dian)電(dian)(dian)流(liu)(liu)。當(dang)升(sheng)到所需的(de)電(dian)(dian)壓(ya)(ya)(ya)或電(dian)(dian)流(liu)(liu)后(hou),按(an)規定時間記錄電(dian)(dian)流(liu)(liu)表(biao)(biao)及電(dian)(dian)壓(ya)(ya)(ya)表(biao)(biao)的(de)讀數。