一、什么是三相多功能電力儀表
三相多功(gong)能(neng)(neng)電力儀表是一種具有可(ke)編程測(ce)量(liang)(liang)、顯(xian)示、數字通訊和(he)電能(neng)(neng)脈沖變送(song)輸(shu)出(chu)等多功(gong)能(neng)(neng)智能(neng)(neng)儀表,能(neng)(neng)夠完成電量(liang)(liang)測(ce)量(liang)(liang)、電能(neng)(neng)計量(liang)(liang)、數據顯(xian)示、采集及(ji)傳輸(shu),可(ke)廣泛應用變電站自(zi)動(dong)化、配電自(zi)動(dong)化、智能(neng)(neng)建(jian)筑、企業(ye)內部的電能(neng)(neng)測(ce)量(liang)(liang)、管理、考核(he)。
二、三相多功能電力儀表怎么使用
三相多(duo)功(gong)能電(dian)(dian)力(li)儀表是一(yi)種用(yong)于(yu)測(ce)量(liang)電(dian)(dian)力(li)參(can)數的(de)設備,它(ta)可以測(ce)量(liang)電(dian)(dian)壓、電(dian)(dian)流、功(gong)率、功(gong)率因數、電(dian)(dian)能等(deng)多(duo)種參(can)數,使(shi)用(yong)三項多(duo)功(gong)能電(dian)(dian)力(li)儀表的(de)方法如下:
1、安裝方法
(1)在固定(ding)的配電柜(ju)上(shang),選(xuan)擇(ze)合(he)適的地方開一個開孔尺寸的安(an)裝孔。
(2)取出儀表,松(song)開定位螺絲,取下(xia)固定夾。
(3)將儀表(biao)安(an)裝插入配電柜的(de)儀表(biao)孔中。
(4)插入(ru)儀表的固(gu)(gu)定(ding)夾,固(gu)(gu)定(ding)定(ding)位(wei)螺絲。
2、接線方法
三相多功(gong)能電(dian)(dian)(dian)(dian)力儀(yi)表的(de)接(jie)線(xian)(xian)方法一般分為兩種:直接(jie)接(jie)線(xian)(xian)和(he)互(hu)感(gan)器接(jie)線(xian)(xian)。直接(jie)接(jie)線(xian)(xian)是將電(dian)(dian)(dian)(dian)力儀(yi)表的(de)電(dian)(dian)(dian)(dian)源(yuan)線(xian)(xian)、電(dian)(dian)(dian)(dian)流(liu)線(xian)(xian)、電(dian)(dian)(dian)(dian)壓線(xian)(xian)直接(jie)接(jie)入電(dian)(dian)(dian)(dian)源(yuan)、負載等電(dian)(dian)(dian)(dian)路中(zhong),適(shi)用(yong)于(yu)小功(gong)率電(dian)(dian)(dian)(dian)路。互(hu)感(gan)器接(jie)線(xian)(xian)是將電(dian)(dian)(dian)(dian)力儀(yi)表的(de)電(dian)(dian)(dian)(dian)源(yuan)線(xian)(xian)、電(dian)(dian)(dian)(dian)流(liu)線(xian)(xian)、電(dian)(dian)(dian)(dian)壓線(xian)(xian)分別接(jie)入互(hu)感(gan)器中(zhong),再將互(hu)感(gan)器接(jie)入電(dian)(dian)(dian)(dian)源(yuan)、負載等電(dian)(dian)(dian)(dian)路中(zhong),適(shi)用(yong)于(yu)大功(gong)率電(dian)(dian)(dian)(dian)路。
3、參數設置
在使(shi)用三相多(duo)功(gong)能(neng)電(dian)(dian)力(li)儀表之(zhi)前,需要對其進行參數(shu)設(she)置。參數(shu)設(she)置包括電(dian)(dian)壓、電(dian)(dian)流、功(gong)率因數(shu)、電(dian)(dian)能(neng)等(deng)參數(shu)的設(she)定。一般情況下,電(dian)(dian)力(li)儀表會有(you)一個(ge)菜單(dan)界面,用戶(hu)可以通過(guo)菜單(dan)界面進行參數(shu)設(she)置。
4、數據讀取
三相多功(gong)(gong)能(neng)電(dian)(dian)(dian)力儀表可(ke)以通過(guo)顯示(shi)(shi)屏顯示(shi)(shi)電(dian)(dian)(dian)壓、電(dian)(dian)(dian)流、功(gong)(gong)率、功(gong)(gong)率因數、電(dian)(dian)(dian)能(neng)等參數的數值(zhi)。此(ci)外(wai),電(dian)(dian)(dian)力儀表還可(ke)以通過(guo)通訊接口將數據傳輸到計(ji)算(suan)機等設備(bei)中,以便進行數據分析和(he)處理。
三、多功能電力儀表使用說明及注意事項
多功能電力儀表使用要(yao)注意(yi)的事項(xiang)有很多,包括:
1、使(shi)用前,儀(yi)表(biao)需通電15分鐘。
2、注意防止(zhi)震動和沖擊,不要(yao)在有(you)(you)超(chao)量灰(hui)塵和超(chao)量有(you)(you)害(hai)氣體的地方使用。
3、輸(shu)入導(dao)線(xian)(xian)不(bu)宜過(guo)長,如被測(ce)信號輸(shu)入端較長時請試用雙絞屏(ping)蔽(bi)線(xian)(xian)。
4、若信號伴隨高頻(pin)干擾,應(ying)在(zai)線里(li)試(shi)用低(di)頻(pin)過(guo)濾器。
5、長(chang)時(shi)(shi)間(jian)存放未使用時(shi)(shi),請每三(san)個月通電一(yi)次不少于4小時(shi)(shi)。
6、長期保存應避開直(zhi)射光線,宜(yi)存放在環(huan)境溫度-25°C~55°C.
7、如儀(yi)表無顯(xian)示,應先(xian)檢(jian)查(cha)輔助電(dian)源,電(dian)壓是否在范圍(wei)內。
8、如顯示不正常,檢查輸入信(xin)號是(shi)(shi)否(fou)正常及信(xin)號接線端(duan)是(shi)(shi)否(fou)擰緊。
9、除非(fei)PT有(you)足夠功率,否則不(bu)能使用PT信號(hao)同時作為輔(fu)助電源,以保證儀表正常(chang)工作。
10、CT回路中的電流接線端子(zi)螺絲務必擰(ning)緊,保證(zheng)進/出線接觸(chu)可(ke)靠(kao),以免產(chan)生(sheng)故(gu)障(zhang)。
11、若要校驗儀(yi)表(biao),校驗儀(yi)器應優于0.1級,才能(neng)保證校驗精度。