試驗完畢后(hou),降壓(ya),將調壓(ya)電位器回零(ling)后(hou),隨后(hou)按綠色按鈕,切斷高壓(ya)并關閉電源開關。

120KV直流高壓試驗器|200kv直流泄漏測試儀 試(shi)驗完(wan)畢后(hou)(hou),應用(yong)(yong)放電(dian)(dian)棒對(dui)試(shi)品(pin)進(jin)行多次放電(dian)(dian),放電(dian)(dian)后(hou)(hou)方(fang)可(ke)(ke)靠近(jin)試(shi)品(pin)和(he)拆線工(放電(dian)(dian)請詳細見放電(dian)(dian)棒使用(yong)(yong)說明(ming)書)。對(dui)小電(dian)(dian)容試(shi)品(pin)如氧(yang)(yang)化(hua)鋅(xin)避(bi)雷(lei)(lei)器(qi)、磁吹避(bi)雷(lei)(lei)器(qi)等先用(yong)(yong)粗(cu)調(diao)(diao)升(sheng)到(dao)所需電(dian)(dian)壓(ya)(電(dian)(dian)流).從(cong)數(shu)顯表(biao)上讀出電(dian)(dian)壓(ya)(電(dian)(dian)流)數(shu)值(zhi)(zhi)。如需對(dui)氧(yang)(yang)化(hua)鋅(xin)避(bi)雷(lei)(lei)器(qi)進(jin)行75%VDC-1mA的測量時,應先升(sheng)到(dao)電(dian)(dian)流到(dao)1mA時電(dian)(dian)壓(ya)值(zhi)(zhi)停止(zhi)(這時可(ke)(ke)記錄電(dian)(dian)壓(ya)、電(dian)(dian)流值(zhi)(zhi)),然后(hou)(hou)按下黃色按鈕,電(dian)(dian)壓(ya)即降到(dao)原來的75%,并保(bao)持此狀(zhuang)態。此時可(ke)(ke)讀取微(wei)安表(biao)數(shu)值(zhi)(zhi)及電(dian)(dian)壓(ya)值(zhi)(zhi)。測量完(wan)畢后(hou)(hou),調(diao)(diao)壓(ya)電(dian)(dian)位器(qi)逆(ni)時針回到(dao)零位,按下綠色按鈕,需再次升(sheng)壓(ya)時按紅色按鈕即可(ke)(ke)。

120KV直流高壓試驗器|200kv直流泄漏測試儀對大電(dian)(dian)(dian)(dian)(dian)容試品時(shi),升壓應(ying)更(geng)要(yao)(yao)緩(huan)慢,并(bing)需(xu)要(yao)(yao)監視電(dian)(dian)(dian)(dian)(dian)流(liu)表(biao)充電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)不超過發生(sheng)器的大充電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu),一定(ding)要(yao)(yao)放(fang)慢升壓速度,避免(mian)充電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)過大。試驗(yan)完(wan)畢后,將電(dian)(dian)(dian)(dian)(dian)壓調節(jie)電(dian)(dian)(dian)(dian)(dian)位(wei)器逆時(shi)針回到(dao)零位(wei)上,隨后按(an)(an)綠色(se)按(an)(an)鈕,切斷高壓。此時(shi)注意電(dian)(dian)(dian)(dian)(dian)壓表(biao)上的電(dian)(dian)(dian)(dian)(dian)壓降到(dao)15kV左右,方可用放(fang)電(dian)(dian)(dian)(dian)(dian)棒進行多次放(fang)電(dian)(dian)(dian)(dian)(dian),確(que)保(bao)安全。

4、幾種測量方法

◆ 一(yi)般測量時,當接(jie)好線(xian)(xian)后(hou)(hou),先把聯接(jie)試品的線(xian)(xian)懸空,升(sheng)到試驗電(dian)(dian)(dian)(dian)壓后(hou)(hou),讀(du)取空試時的電(dian)(dian)(dian)(dian)暈和(he)雜散(san)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)I′,然后(hou)(hou)接(jie)上(shang)試品升(sheng)到試驗電(dian)(dian)(dian)(dian)壓,讀(du)取總(zong)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)I1。試品泄(xie)漏電(dian)(dian)(dian)(dian)流(liu)(liu)(liu):I0=I1- I′

◆ 當(dang)需(xu)要精密測(ce)量被試品的泄(xie)漏電流時(shi),應(ying)在(zai)高壓回(hui)路中(zhong)串接(jie)高壓屏蔽(bi)微安表。

◆ 對氧化鋅避(bi)雷器、磁吹避(bi)雷器等試品接地端可(ke)分開的(de)情況下(xia),也(ye)可(ke)采用在試品的(de)底部(地電位側)串(chuan)入電流表進行(xing)測量的(de)方(fang)式,但也(ye)必須使用屏蔽(bi)線。

◆ 試驗(yan)完畢,降壓,將調壓電位器回零后(hou),隨后(hou)按(an)綠色按(an)鈕(niu),

切斷高壓并關閉電源開關。

◆對于(yu)氧(yang)化(hua)鋅避雷器等小電(dian)(dian)容試(shi)(shi)品(pin)(pin),一(yi)般(ban)通過(guo)測(ce)壓電(dian)(dian)阻(zu)放電(dian)(dian),時(shi)間很快(kuai)。而(er)對電(dian)(dian)纜(lan)、電(dian)(dian)機等大電(dian)(dian)容試(shi)(shi)品(pin)(pin),一(yi)般(ban)要(yao)等待(dai)試(shi)(shi)品(pin)(pin)電(dian)(dian)壓自(zi)放電(dian)(dian)到試(shi)(shi)驗電(dian)(dian)壓的20%以下,再(zai)通過(guo)放電(dian)(dian)棒進(jin)行放電(dian)(dian)。待(dai)試(shi)(shi)品(pin)(pin)充分放電(dian)(dian)后并掛好接地(di)線(xian)(xian)(xian),才允許進(jin)行高壓引線(xian)(xian)(xian)的拆除和更換(huan)接線(xian)(xian)(xian)工作。做(zuo)電(dian)(dian)纜(lan)泄(xie)漏試(shi)(shi)驗時(shi)必需(xu)接好保(bao)護電(dian)(dian)阻(zu)。以防電(dian)(dian)流回放。燒壞儀器。

◆ 保護動作(zuo)后(hou)的操作(zuo)

在使(shi)用過程中(zhong)發現紅燈滅,綠燈亮,直流高(gao)壓下降,即為有關保護(hu)動作。此(ci)時(shi)應按下列步(bu)驟(zou)操作:

⑴ 將調壓電位器退回零位。

⑵ 關閉電源(yuan)開關,面板指示燈均不亮(liang)。

⑶ 一分鐘后,待機內低(di)壓電容器充分放電后,才(cai)允許再(zai)次(ci)打開電源開關。重新進(jin)行空載試驗,并查明情(qing)況(kuang)后,可(ke)再(zai)次(ci)升壓試驗。

⑴ 將機箱和倍(bei)壓器連(lian)接(jie)到適當的(de)位置，連(lian)接(jie)電(dian)(dian)源(yuan)電(dian)(dian)纜(lan)，電(dian)(dian)纜(lan)和接(jie)地電(dian)(dian)纜(lan)，并保護接(jie)地電(dian)(dian)纜(lan)和工作連(lian)接(jie)；

⑵ 檢查儀器(qi)、放電棒、倍壓(ya)(ya)筒(tong)、試品聯(lian)接線、接地線是否(fou)正確，接地線聯(lian)接是否(fou)可靠(kao)，檢查高(gao)壓(ya)(ya)安(an)全距離是否(fou)符(fu)合要求(qiu)，方可開始(shi)進行試品的高(gao)壓(ya)(ya)試驗；

(3) 過電(dian)壓保護設(she)定值通常為測(ce)試電(dian)壓的1.1倍；

(4)順(shun)時針方(fang)向平穩(wen)調節壓力電位計，輸出從零升(sheng)壓，升(sheng)至(zhi)所需(xu)電壓后，根據時間記錄電流(liu)(liu)表讀數(shu)，并檢查控(kong)制箱以及(ji)高壓輸出線是否有異常和聲音。在試件上進行泄漏和直流(liu)(liu)耐壓測試；

(5)進行(xing)檢查測(ce)試(shi)以確認(ren)測(ce)試(shi)儀中沒(mei)有異常后，啟動測(ce)試(shi)樣品。泄漏(lou)和直流耐壓測(ce)試(shi)；

(6)連接(jie)測試樣品，地線等(deng)，檢查后打開電(dian)源。升至所需的電(dian)壓或電(dian)流。提升速度(du)優選地是每秒3-5kV的測試電(dian)壓；

(7)對(dui)于大電容測(ce)試，需要監(jian)控電流表的充(chong)電電流不(bu)超過測(ce)試儀的大充(chong)電電流；

(8)首(shou)先(xian)將(jiang)其(qi)升(sheng)高到(dao)所(suo)需電壓(電流(liu))的95%，然后將(jiang)其(qi)緩慢升(sheng)高至所(suo)需電壓(電流(liu))。然后從數字顯(xian)示器讀取電壓當前值(zhi)；

(9)如果要為氧(yang)化鋅(xin)避雷器測量(liang)(liang)0.75UDC-1mA，請先增加到UDC1mA電(dian)壓(ya)值，然后按黃色，彩色按鈕，電(dian)壓(ya)降低到75%，并(bing)保持此狀態(tai)。此時，可以讀取電(dian)流測量(liang)(liang)值。

特點

1、體(ti)積更(geng)小、重(zhong)量更(geng)輕(qing)、更(geng)美觀、更(geng)可靠、操作簡便、功能齊全(quan)，便于野外使用，是新世紀理(li)想的可靠產品(pin)。

2、采(cai)用*技術(shu)、工(gong)藝(yi)制造(zao)，應(ying)用新(xin)的PWM高(gao)(gao)(gao)(gao)頻(pin)脈寬調制技術(shu)、脈沖串邏輯陣列調制，采(cai)用大功率(lv)IGBT器件，利(li)用高(gao)(gao)(gao)(gao)頻(pin)技術(shu)提高(gao)(gao)(gao)(gao)頻(pin)率(lv)，頻(pin)率(lv)高(gao)(gao)(gao)(gao)達100kHz，從(cong)而使(shi)輸出(chu)高(gao)(gao)(gao)(gao)壓(ya)穩定度更高(gao)(gao)(gao)(gao)，波紋系(xi)數(shu)更小。

3、按(an)免(mian)維修設計，主要部件均選用美、德、日等國進口*技術的元器件，經久耐用，不怕(pa)連(lian)續對(dui)地直(zhi)接短(duan)路放電。

4、精度高、測量準(zhun)確。電(dian)(dian)(dian)壓(ya)(ya)、電(dian)(dian)(dian)流(liu)(liu)表均(jun)為數字顯示(shi)，電(dian)(dian)(dian)壓(ya)(ya)分(fen)辨率(lv)為0.1kV，電(dian)(dian)(dian)流(liu)(liu)分(fen)辨率(lv)為0.1uA，控制箱(xiang)上電(dian)(dian)(dian)壓(ya)(ya)表直接(jie)顯示(shi)加在負載(zai)試品上的電(dian)(dian)(dian)壓(ya)(ya)值，使用時無需(xu)外加分(fen)壓(ya)(ya)器，接(jie)線(xian)簡單。儀器具有高、低壓(ya)(ya)端測量泄漏電(dian)(dian)(dian)流(liu)(liu)，高壓(ya)(ya)端采用圓(yuan)形屏(ping)蔽數字表顯示(shi)，不怕放電(dian)(dian)(dian)沖擊(ji)，抗干擾(rao)性能好，適合現場(chang)使用。

5、電(dian)壓(ya)調(diao)(diao)(diao)(diao)節(jie)穩(wen)定度高，全量程平滑調(diao)(diao)(diao)(diao)壓(ya)，輸出電(dian)壓(ya)調(diao)(diao)(diao)(diao)節(jie)采用進口單個多圈電(dian)位器，升壓(ya)過程平穩(wen)，調(diao)(diao)(diao)(diao)節(jie)精(jing)度高，并設(she)計有(you)粗調(diao)(diao)(diao)(diao)和細(xi)調(diao)(diao)(diao)(diao)功能。電(dian)壓(ya)調(diao)(diao)(diao)(diao)節(jie)精(jing)度優于(yu)0.1%，電(dian)壓(ya)、電(dian)流測量誤差(cha)小(xiao)于(yu)1.0%，脈動因(yin)數優于(yu)0.5%。

6、負(fu)極性輸出(chu)、零啟動、連續可調、有過電壓、過電流、回零、接地保(bao)(bao)(bao)護(hu)(hu)(hu)、*斷線保(bao)(bao)(bao)護(hu)(hu)(hu)等各種保(bao)(bao)(bao)護(hu)(hu)(hu)功(gong)能。自動保(bao)(bao)(bao)護(hu)(hu)(hu)電路功(gong)能強(qiang)，保(bao)(bao)(bao)護(hu)(hu)(hu)完善可靠(kao)，使操作安全，各種技(ji)術指標(biao)均優(you)于行(xing)業標(biao)準及優(you)于同類產品。

7、增設了高精(jing)度75%VDC-1mA的(de)(de)功能，做氧化鋅(xin)避雷器測量帶來極大(da)的(de)(de)方便。輕輕一按(an)(an)無須(xu)計算(suan)。本儀器控制箱(xiang)上有75%的(de)(de)電壓功能鍵，在做避雷器試(shi)驗(yan)時(shi)，當電流升(sheng)到1000uA時(shi)、就打開(kai)(kai)0.75的(de)(de)按(an)(an)鈕，這時(shi)電壓表(biao)、電流表(biao)所(suo)顯示的(de)(de)值就是(shi)75%的(de)(de)數據(ju)，做完后應(ying)立即將升(sheng)壓的(de)(de)旋鈕回到零位上，同時(shi)將細調電壓旋鈕回到零位上，并應(ying)立即按(an)(an)綠色(se)按(an)(an)鈕，切斷高壓并關(guan)閉(bi)電源開(kai)(kai)關(guan)。再(zai)做其它的(de)(de)試(shi)驗(yan)。

8、方便的過電壓整定設(she)置功能，采用(yong)了數字撥(bo)盤開(kai)關，能將整定電壓值(zhi)直觀顯示，使你操(cao)作更(geng)隨意，顯示數值(zhi)單位為kV。

9、倍壓筒可分節(jie)結構(gou)，現(xian)場使用(yong)，靈活方(fang)便，一機多用(yong)，經(jing)濟實惠。