產品搜(sou)索
直流高壓(ya)發生器(qi)采用(yong)(yong)智能倍壓(ya)電路(lu)，使控制箱和倍壓(ya)缸的體積和重(zhong)量大(da)大(da)減小，調整了(le)PWM技術的不準(zhun)確線性(xing)度(du)，大(da)大(da)提高了(le)儀器(qi)的精度(du)，更便于現場使用(yong)(yong)。
1、使用前準備
⑴直流高壓發生器(qi)在使用前應檢查(cha)其完好(hao)性，聯接電(dian)纜線不應有(you)斷路和短路，設(she)備無破裂等(deng)損壞(huai)。
⑵將機箱、倍壓筒放置到合適(shi)的(de)(de)安全的(de)(de)位置，分別聯(lian)接好電(dian)源(yuan)線(xian)、電(dian)纜線(xian)和接地(di)線(xian)。保護(hu)接地(di)線(xian)與工作接地(di)線(xian)以(yi)及放電(dian)棒的(de)(de)接地(di)線(xian)均應單獨(du)接到試品的(de)(de)地(di)線(xian)上（即(ji)一點接地(di)）并(bing)確保接地(di)良好。嚴禁各接地(di)線(xian)相互串聯(lian)使用，以(yi)免擊穿時地(di)電(dian)位抬高形成反擊，損壞儀器(qi)。
⑶檢查(cha)電源開關(guan)是否在(zai)(zai)關(guan)斷的位置(zhi)上(shang)，并檢查(cha)調壓(ya)電位器應在(zai)(zai)零位上(shang)，過電壓(ya)保護整定撥(bo)盤開關(guan)設置(zhi)在(zai)(zai)適當(dang)的位置(zhi)上(shang)，一般為1。10～1。20倍測試電壓(ya)值。
2、空載升(sheng)壓驗(yan)證過(guo)電壓保護整定(ding)值
⑴請認(ren)準電源(yuan)是單(dan)相交流220V，50Hz。接通(tong)電源(yuan)開關，此時綠燈亮(liang)，表(biao)示電源(yuan)接通(tong)。
⑵按(an)紅(hong)色按(an)鈕，則紅(hong)燈亮，表示高壓接通。
⑶直流(liu)高壓發生器順時針方(fang)向平(ping)緩(huan)調節調壓電位(wei)器，輸出端即從零開始升(sheng)壓。電壓表顯示為(wei)負載試品上的電壓（KV）值，電流(liu)表則顯示試品上流(liu)過的電流(liu)與(yu)所有泄漏電流(liu)之(zhi)和(he)，電流(liu)以(yi)微(wei)安（uA）為(wei)單位(wei)。升(sheng)到所需(xu)的電壓后，按規定時間記錄電流(liu)表讀數，并檢查控制箱及輸出電纜有無異常(chang)現象及聲響(xiang)。
⑷降壓(ya)，將調壓(ya)電位(wei)器回零(ling)后，隨后按綠色按鈕(niu)，切斷(duan)高(gao)壓(ya)并(bing)關閉電源開關。
3、對試(shi)品進行(xing)泄漏及直流耐壓試(shi)驗
⑴在做(zuo)負載試驗前，將(jiang)高壓屏(ping)蔽微安(an)表安(an)裝到倍壓筒(tong)上(shang)的(de)高壓輸出端(duan)上(shang)，并將(jiang)配套(tao)的(de)專用高壓線(xian)分(fen)別接到微安(an)表上(shang)和(he)被(bei)試品上(shang)。
⑵直流(liu)高壓發(fa)生(sheng)器檢(jian)查儀器、放電棒、倍壓筒、試品聯接線(xian)、接地線(xian)是(shi)(shi)否(fou)(fou)正確，接地線(xian)聯接是(shi)(shi)否(fou)(fou)可(ke)靠(kao)，檢(jian)查高壓安全距離是(shi)(shi)否(fou)(fou)符合要求，方可(ke)開始(shi)進行試品的高壓試驗。
⑶檢(jian)查(cha)確認儀(yi)器等(deng)無異(yi)常情(qing)況后，接(jie)通(tong)單相交流(liu)220V電源(yuan)開(kai)關，此時綠燈亮，表(biao)示(shi)電源(yuan)接(jie)通(tong)。可開(kai)始進行試(shi)品(pin)的(de)直流(liu)泄(xie)漏和(he)直流(liu)耐壓試(shi)驗(yan)。
⑷按(an)(an)紅(hong)色按(an)(an)鈕，則紅(hong)燈亮，表(biao)示(shi)高壓(ya)接通(tong)，待升高壓(ya)。
⑸順(shun)時針方向(xiang)平緩調(diao)(diao)節調(diao)(diao)壓(ya)(ya)(ya)電(dian)(dian)(dian)位器(qi)(qi)，輸(shu)出端(duan)即(ji)從零開始升壓(ya)(ya)(ya)。升壓(ya)(ya)(ya)速度以(yi)每秒3-5kV上升試(shi)驗電(dian)(dian)(dian)壓(ya)(ya)(ya)為宜。對于(yu)大電(dian)(dian)(dian)容試(shi)品升壓(ya)(ya)(ya)時則(ze)需要緩慢(man)升壓(ya)(ya)(ya)，否則(ze)可能導致電(dian)(dian)(dian)壓(ya)(ya)(ya)過(guo)沖，還(huan)需監視電(dian)(dian)(dian)流(liu)(liu)表(biao)充電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)不超過(guo)直流(liu)(liu)發生器(qi)(qi)的(de)zui大充電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)。當升到所需的(de)電(dian)(dian)(dian)壓(ya)(ya)(ya)或電(dian)(dian)(dian)流(liu)(liu)后，按規定(ding)時間記(ji)錄電(dian)(dian)(dian)流(liu)(liu)表(biao)及電(dian)(dian)(dian)壓(ya)(ya)(ya)表(biao)的(de)讀數。
⑹直流高(gao)壓(ya)發(fa)生器試驗完畢(bi)后(hou)(hou)，降壓(ya)，將調壓(ya)電位器回零后(hou)(hou)，隨后(hou)(hou)按綠色按鈕，切斷高(gao)壓(ya)并關閉電源開(kai)關。
⑺試(shi)驗(yan)完畢后，應(ying)用放電(dian)(dian)(dian)(dian)(dian)(dian)棒對(dui)試(shi)品(pin)(pin)進行多次(ci)放電(dian)(dian)(dian)(dian)(dian)(dian)，放電(dian)(dian)(dian)(dian)(dian)(dian)后方可(ke)靠近(jin)試(shi)品(pin)(pin)和拆線工作。對(dui)小電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)試(shi)品(pin)(pin)如(ru)(ru)氧(yang)化鋅(xin)避雷器(qi)、磁吹避雷器(qi)等緩緩調(diao)節調(diao)壓電(dian)(dian)(dian)(dian)(dian)(dian)位器(qi)升(sheng)壓到(dao)所(suo)需(xu)(xu)的電(dian)(dian)(dian)(dian)(dian)(dian)壓（電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)）值(zhi)(zhi)(zhi)，然后從數顯表上讀(du)出電(dian)(dian)(dian)(dian)(dian)(dian)壓（電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)）數值(zhi)(zhi)(zhi)。如(ru)(ru)需(xu)(xu)對(dui)氧(yang)化鋅(xin)避雷器(qi)進行75%UDC-1mA的測量時，應(ying)先升(sheng)到(dao)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)到(dao)1000uA時電(dian)(dian)(dian)(dian)(dian)(dian)壓值(zhi)(zhi)(zhi)停(ting)止（這時可(ke)記錄電(dian)(dian)(dian)(dian)(dian)(dian)壓、電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)值(zhi)(zhi)(zhi)），然后按下黃色按鈕，電(dian)(dian)(dian)(dian)(dian)(dian)壓即降到(dao)原來的75%，并(bing)保持此(ci)狀態。此(ci)時可(ke)讀(du)取微安表數值(zhi)(zhi)(zhi)及電(dian)(dian)(dian)(dian)(dian)(dian)壓值(zhi)(zhi)(zhi)。
測(ce)量完(wan)畢(bi)后，調(diao)壓(ya)(ya)電(dian)(dian)(dian)位器(qi)逆時(shi)(shi)針回到(dao)零(ling)(ling)位，按(an)下綠(lv)色按(an)鈕(niu)，需(xu)再次(ci)(ci)升壓(ya)(ya)時(shi)(shi)按(an)紅色按(an)鈕(niu)即可(ke)(ke)。對大(da)電(dian)(dian)(dian)容試品(pin)時(shi)(shi)，升壓(ya)(ya)應更(geng)要(yao)緩慢(man)，并需(xu)要(yao)監視電(dian)(dian)(dian)流(liu)表充(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)不超(chao)過發生器(qi)的最大(da)充(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)，一定要(yao)放慢(man)升壓(ya)(ya)速度(du)，避免充(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)過大(da)。試驗(yan)完(wan)畢(bi)后，將電(dian)(dian)(dian)壓(ya)(ya)調(diao)節電(dian)(dian)(dian)位器(qi)逆時(shi)(shi)針回到(dao)零(ling)(ling)位上，隨后按(an)綠(lv)色按(an)鈕(niu)，切斷高壓(ya)(ya)，此時(shi)(shi)先不要(yao)關閉電(dian)(dian)(dian)源，電(dian)(dian)(dian)壓(ya)(ya)表顯示還(huan)有(you)電(dian)(dian)(dian)壓(ya)(ya)值，此為(wei)存電(dian)(dian)(dian)電(dian)(dian)(dian)壓(ya)(ya)，等電(dian)(dian)(dian)壓(ya)(ya)降到(dao)2000V左右，方可(ke)(ke)用(yong)放電(dian)(dian)(dian)棒進行多次(ci)(ci)放電(dian)(dian)(dian)，確保安(an)全。
4、直流高壓(ya)發生器(qi)在使用過程中發現紅燈滅，綠(lv)燈亮，直流高壓(ya)下(xia)降，即(ji)為有(you)關(guan)保護動作(zuo)。此時應按下(xia)列(lie)步(bu)驟操(cao)作(zuo)：
⑴將調(diao)壓電(dian)位器退回零(ling)位。
⑵關閉電(dian)源(yuan)開關，面板(ban)指示燈均不亮(liang)。
⑶一分鐘后，待機內低(di)壓(ya)電容器充分放(fang)電后，才(cai)允許再次(ci)打(da)開電源(yuan)開關。重新(xin)進行(xing)空載試驗，并查明情況(kuang)后，可再次(ci)升(sheng)壓(ya)試驗。
5、注意：直(zhi)流(liu)(liu)高壓發(fa)生器(qi)做電纜試驗時，要安裝限(xian)流(liu)(liu)電阻(zu)使用。（做其它試驗時，不能使用限(xian)流(liu)(liu)電阻(zu)）
