三相多功能電容電感測試儀技術特點
一、概述: 電(dian)容電(dian)感測(ce)試(shi)儀主要是對無功補償裝置的(de)高(gao)壓并(bing)聯電(dian)容組,以及電(dian)抗器(qi)的(de)測(ce)量(liang),其測(ce)量(liang)依(yi)據(ju),符合SJ-255-10300電(dian)容測(ce)量(liang)儀(yi)國(guo)家(jia)標準。針對變電(dian)站現場(chang)高(gao)壓并(bing)聯電(dian)容器(qi)組測(ce)量(liang)時存在(zai)的(de)問(wen)題(ti)而專門研制,它主要解決了以下(xia)問(wen)題(ti):
△ 現場測量電(dian)容器不需拆(chai)除(chu)連接線,減化試驗過程、有(you)效(xiao)提高工作效(xiao)率、避免損害電(dian)力設備(bei);
△ 完(wan)整參數測量,極易判別電(dian)容(rong)器的(de)品質變(bian)化,及器件(jian)間(jian)連接導體故障;
△ 大容量數(shu)(shu)據(ju)(ju)存儲和(he)USB通信,不需現場抄寫數(shu)(shu)據(ju)(ju),確保了測量數(shu)(shu)據(ju)(ju)完整;
二、測量儀器特點:
△ 本儀(yi)器(qi)采用了(le)先(xian)進的(de)測(ce)(ce)量原理(li)與(yu)四端(duan)測(ce)(ce)量技術(shu),可以測(ce)(ce)量、測(ce)(ce)試重復性(xing)能(neng)好;
△ 大屏幕液晶顯(xian)示屏(320X240點陣),漢字菜單提示操(cao)作(zuo);
△ 液晶屏幕自帶觸屏按(an)鍵(jian),使(shi)操作直觀、簡單;
△ 電流自動分段補償(chang),使(shi)全量(liang)程電流線(xian)性化,提高了儀器測量(liang)精度(du);
△ 環(huan)境溫度(du)監測,便于(yu)電(dian)容器在不(bu)同(tong)溫度(du)下對(dui)容值的影響;
△ 新一代USB通信(xin)功(gong)能簡化與PC機連接,方便(bian)于測量(liang)數(shu)據傳輸和管理;
三、檢測參數項目:
電容器
1. 電容值C |
2.電壓值U |
3.電流值I |
4.頻率值F |
5.有功功率量P |
7. 電抗值XC |
8.電阻值R |
9.相位角φ |
6.無功功率值Q |
電感器
1. 電感值L |
2.電壓值U |
3.電流值I |
4.頻率值F |
5.有功功率量P |
7. 電抗值XL |
8.電阻值R |
9.相位角φ |
6.無功功率值Q |
四、等效方式:
RC內部(bu)串(chuan)、并等(deng)效電路圖
,Cx 為(wei)實(shi)際(ji)電(dian)(dian)(dian)(dian)(dian)容量,Rs 為(wei)引(yin)線(xian)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu),Lo 為(wei)引(yin)線(xian)電(dian)(dian)(dian)(dian)(dian)感,Rp 為(wei)極間(jian)絕緣電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu),Co 為(wei)極間(jian)分布電(dian)(dian)(dian)(dian)(dian)容,實(shi)際(ji)電(dian)(dian)(dian)(dian)(dian)感、電(dian)(dian)(dian)(dian)(dian)容、電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)并非理想(xiang)的電(dian)(dian)(dian)(dian)(dian)抗或電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)元(yuan)(yuan)件(jian),而是(shi)以串聯(lian)或并聯(lian)形(xing)式(shi)(shi)呈現為(wei)一(yi)個(ge)復阻(zu)(zu)(zu)(zu)抗元(yuan)(yuan)件(jian),本(ben)儀(yi)器根(gen)據(ju)(ju)串聯(lian)或并聯(lian)等(deng)效(xiao)(xiao)(xiao)電(dian)(dian)(dian)(dian)(dian)路(lu)來計算其所需值(zhi),不(bu)(bu)(bu)同等(deng)效(xiao)(xiao)(xiao)電(dian)(dian)(dian)(dian)(dian)路(lu)將得(de)到不(bu)(bu)(bu)同的結果,其不(bu)(bu)(bu)同性取(qu)決(jue)于(yu)不(bu)(bu)(bu)同的元(yuan)(yuan)件(jian)。一(yi)般對于(yu)低值(zhi)阻(zu)(zu)(zu)(zu)抗元(yuan)(yuan)件(jian)(基(ji)本(ben)是(shi)高(gao)(gao)值(zhi)電(dian)(dian)(dian)(dian)(dian)容和(he)低值(zhi)電(dian)(dian)(dian)(dian)(dian)感)用串聯(lian)等(deng)效(xiao)(xiao)(xiao)電(dian)(dian)(dian)(dian)(dian)路(lu)。反之,對于(yu)高(gao)(gao)值(zhi)阻(zu)(zu)(zu)(zu)抗元(yuan)(yuan)件(jian)(基(ji)本(ben)是(shi)低值(zhi)電(dian)(dian)(dian)(dian)(dian)容和(he)高(gao)(gao)值(zhi)電(dian)(dian)(dian)(dian)(dian)感)使用并聯(lian)等(deng)效(xiao)(xiao)(xiao)電(dian)(dian)(dian)(dian)(dian)路(lu)。根(gen)據(ju)(ju)現場實(shi)際(ji)使用情況只有兩(liang)種,(1)測試器件(jian)內部品質(zhi)變化(hua),選擇等(deng)效(xiao)(xiao)(xiao)方式(shi)(shi)為(wei)“并聯(lian)等(deng)效(xiao)(xiao)(xiao)”; (2) 測試器件(jian)外部連接(jie)導線(xian)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)變化(hua),選擇等(deng)效(xiao)(xiao)(xiao)方式(shi)(shi)為(wei)“串聯(lian)等(deng)效(xiao)(xiao)(xiao)”。
五、儀器技術參數:
◆儀器正常工作條件
△ 環(huan)境溫度:-10℃ ~ +40℃;
△ 相對濕度(du):≤90%;
△ 工作電源(yuan):220V±10%工頻;
△ 額定頻率:50Hz;
△ 額定輸出:22V/2/500VA;
△ 儀器體(ti)積:420×170×340mm(寬×高×深);
△ 重量(liang):約(yue)10kg;
六、測量(liang)范圍、分辨率及(ji)誤(wu)差值:
電容測量檔位: |
誤差值: |
(1) 0.010μF ~ 0.200μF; |
±0.5%; |
(2) 0.200μF ~ 2.000μF; |
±0.5%; |
(3) 2.000μF ~ 20.00μF; |
±0.5%; |
(4) 20.00μF ~ 200.0μF; |
±0.5%; |
(5) 200.0μF ~ 3300.μF; |
±0.5%; |