直流高壓發生器你知道如何使用嗎?

如做容性負載試驗時，一定要接上限流電阻。

1.試驗(yan)器在(zai)使用前應檢(jian)查(cha)其完好性，聯(lian)接電纜不應有斷路(lu)和短路(lu)，設備無破裂(lie)等損(sun)壞。

2.將(jiang)機箱、倍壓筒(tong)放(fang)置(zhi)到(dao)合(he)適位(wei)置(zhi)分別聯接(jie)(jie)(jie)好(hao)電(dian)(dian)源線(xian)(xian)、電(dian)(dian)纜線(xian)(xian)和(he)接(jie)(jie)(jie)地(di)(di)線(xian)(xian)，保(bao)護(hu)接(jie)(jie)(jie)地(di)(di)線(xian)(xian)與(yu)工作(zuo)接(jie)(jie)(jie)地(di)(di)線(xian)(xian)以及放(fang)電(dian)(dian)棒的接(jie)(jie)(jie)地(di)(di)線(xian)(xian)均應(ying)單獨(du)接(jie)(jie)(jie)到(dao)試(shi)品(pin)的地(di)(di)線(xian)(xian)上(shang)(即一點接(jie)(jie)(jie)地(di)(di))。嚴禁各接(jie)(jie)(jie)地(di)(di)線(xian)(xian)相互(hu)串(chuan)聯。為此，應(ying)使用DHV接(jie)(jie)(jie)地(di)(di)線(xian)(xian)。

3.電(dian)源開關(guan)放在(zai)關(guan)斷位置并(bing)檢查調(diao)壓(ya)電(dian)位器(qi)應在(zai)零(ling)位。過電(dian)壓(ya)保(bao)護整定值一般為(wei)試驗(yan)電(dian)壓(ya)的1．1倍。

4.空載升(sheng)壓驗證過電壓保(bao)護整定(ding)是(shi)否靈(ling)敏。

5.接(jie)通(tong)電(dian)源開關，此時紅燈(deng)亮，表示電(dian)源接(jie)通(tong)。

6.按綠色按鈕，則綠燈亮，表(biao)示高壓接(jie)通。

7.順(shun)時針方向平(ping)緩(huan)調(diao)節調(diao)壓電(dian)位器，輸(shu)出(chu)端即從(cong)零開始升壓，升至所(suo)需電(dian)壓后，按規(gui)定時間記錄電(dian)流表讀數，并(bing)檢查(cha)控制箱及高壓輸(shu)出(chu)線有無異常現象及聲響。

8.降壓，將調壓電(dian)位器回零后，隨即按紅(hong)色按鈕，切斷高壓并關閉電(dian)源開關。

9.對試(shi)品進行(xing)泄(xie)漏(lou)(lou)及直流耐壓(ya)試(shi)驗(yan)。在進行(xing)檢(jian)查試(shi)驗(yan)確(que)認(ren)試(shi)驗(yan)器無異(yi)常情況后(hou)，即(ji)(ji)可開始(shi)進行(xing)試(shi)品的泄(xie)漏(lou)(lou)及直流耐壓(ya)試(shi)驗(yan)。將試(shi)品、地(di)線等(deng)聯接(jie)好，檢(jian)查無誤(wu)后(hou)即(ji)(ji)打(da)開電源。

10.升(sheng)(sheng)壓(ya)(ya)(ya)至所需(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)或電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)。升(sheng)(sheng)壓(ya)(ya)(ya)速(su)度以每秒3—5kV試驗(yan)(yan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)為宜。對于大電(dian)(dian)(dian)(dian)(dian)(dian)容試品升(sheng)(sheng)壓(ya)(ya)(ya)時(shi)還需(xu)(xu)監視電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)表充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)不(bu)超過(guo)試驗(yan)(yan)器(qi)的大充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)。對小電(dian)(dian)(dian)(dian)(dian)(dian)容試品如氧(yang)化鋅避雷器(qi)、磁吹(chui)避雷器(qi)等先(xian)升(sheng)(sheng)至所需(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu))的95％，再緩慢仔(zi)細升(sheng)(sheng)至所需(xu)(xu)的電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu))。然(ran)后(hou)從(cong)數顯表上讀出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu))值。如需(xu)(xu)對氧(yang)化鋅避雷器(qi)進行0.75UDC—1mA測量時(shi)，先(xian)升(sheng)(sheng)至UDC1mA電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值，然(ran)后(hou)按(an)(an)下(xia)黃色(se)(se)按(an)(an)鈕，此(ci)(ci)時(shi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)即(ji)降至原來的75％，并保持此(ci)(ci)狀態(tai)。此(ci)(ci)時(shi)可讀取電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)。測量完畢后(hou)，調壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)(dian)(dian)位器(qi)逆時(shi)針(zhen)回到(dao)零，按(an)(an)下(xia)綠(lv)色(se)(se)按(an)(an)鈕。需(xu)(xu)再次(ci)升(sheng)(sheng)壓(ya)(ya)(ya)時(shi)按(an)(an)紅色(se)(se)按(an)(an)鈕即(ji)可。

必要時用外接高壓分(fen)壓器比對控制箱上的(de)電壓。

11.試驗完畢，降(jiang)壓，關閉電(dian)源。

12.直流高壓發生器幾種測量方法

1)一般測量時(shi)，當接(jie)好線(xian)后(hou)(hou)，先把聯(lian)接(jie)試(shi)品的線(xian)懸(xuan)空，升到試(shi)驗電(dian)壓(ya)后(hou)(hou)讀取空試(shi)時(shi)的電(dian)暈和雜(za)散電(dian)流I，然后(hou)(hou)接(jie)上試(shi)品升到試(shi)驗電(dian)壓(ya)讀取總電(dian)流Ⅰ1；試(shi)品泄漏電(dian)流：Io =Ⅰ1—I’

2)當需(xu)要(yao)測量(liang)被試品(pin)泄(xie)漏電流時，則應在高(gao)壓側串入高(gao)壓微安表(見下圖)

微安表(biao)(biao)(biao)必須有金屬(shu)屏蔽(bi)，應采用屏蔽(bi)線(xian)與(yu)試(shi)(shi)(shi)品(pin)聯接。高(gao)壓(ya)引線(xian)的(de)(de)屏蔽(bi)引出應與(yu)儀表(biao)(biao)(biao)端的(de)(de)屏蔽(bi)緊密(mi)聯接。如果(guo)試(shi)(shi)(shi)品(pin)表(biao)(biao)(biao)面污穢要排除試(shi)(shi)(shi)品(pin)表(biao)(biao)(biao)面泄(xie)漏電流(liu)的(de)(de)影響可在試(shi)(shi)(shi)品(pin)高(gao)電位端用裸(luo)金屬(shu)軟線(xian)緊密(mi)繞(rao)幾圈后與(yu)高(gao)壓(ya)引線(xian)的(de)(de)屏蔽(bi)相聯接(見下圖(tu))。

3)對氧化(hua)鋅、磁吹避(bi)雷器等(deng)試品接地(di)(di)端可(ke)拆開(kai)的(de)(de)情(qing)況下，也可(ke)采用在(zai)試品的(de)(de)底部(地(di)(di)電位側)串入電流(liu)表進(jin)行(xing)測量(liang)的(de)(de)方式。 當(dang)要排除試品表面泄漏(lou)電流(liu)的(de)(de)影(ying)響，可(ke)用軟的(de)(de)裸(luo)銅線在(zai)試品地(di)(di)電位端繞上幾圈并與屏蔽線的(de)(de)屏蔽相聯接(見(jian)下圖)

13.對于氧化鋅避(bi)雷器(qi)等小電(dian)(dian)容試(shi)(shi)品(pin)一(yi)般通過測(ce)壓電(dian)(dian)阻放電(dian)(dian)時(shi)間(jian)很快(kuai)。而對電(dian)(dian)纜等大電(dian)(dian)容試(shi)(shi)品(pin)一(yi)般要待試(shi)(shi)品(pin)電(dian)(dian)壓自放電(dian)(dian)至試(shi)(shi)驗(yan)電(dian)(dian)壓的(de)(de)(de)20％以下，再通過配套(tao)的(de)(de)(de)放電(dian)(dian)棒進行(xing)放電(dian)(dian)。待試(shi)(shi)品(pin)充分放電(dian)(dian)后掛(gua)好接地線(xian)，才允許進行(xing)高壓引線(xian)的(de)(de)(de)拆除和更換接線(xian)工(gong)作。

14.保護動作后的操作

在使用過(guo)程中(zhong)發現綠燈(deng)(deng)滅(mie)，紅燈(deng)(deng)亮，電(dian)(dian)壓(ya)下(xia)降，即(ji)為有關保護(hu)動作(zuo)。此時應關閉電(dian)(dian)源開(kai)(kai)關，面(mian)板指示燈(deng)(deng)均(jun)不亮。將調壓(ya)電(dian)(dian)位器退回(hui)零位，一分鐘后待機內(nei)低壓(ya)電(dian)(dian)容器充分放電(dian)(dian)后才允許再(zai)次(ci)打開(kai)(kai)電(dian)(dian)源開(kai)(kai)關。重新(xin)進行空載試(shi)驗并查明情(qing)況后可再(zai)次(ci)升(sheng)壓(ya)試(shi)驗。