一、什么是三相多功能電力儀表
三相多(duo)功(gong)能(neng)電(dian)(dian)力儀表是一(yi)種具有可(ke)(ke)編程(cheng)測量(liang)、顯(xian)示(shi)、數(shu)字(zi)通訊和電(dian)(dian)能(neng)脈沖變(bian)送輸出等多(duo)功(gong)能(neng)智能(neng)儀表,能(neng)夠完成電(dian)(dian)量(liang)測量(liang)、電(dian)(dian)能(neng)計量(liang)、數(shu)據顯(xian)示(shi)、采集及傳輸,可(ke)(ke)廣泛(fan)應用(yong)變(bian)電(dian)(dian)站自動(dong)化、配電(dian)(dian)自動(dong)化、智能(neng)建筑、企業內部的電(dian)(dian)能(neng)測量(liang)、管理、考核。
二、三相多功能電力儀表怎么使用
三相多功能電(dian)(dian)力儀表是一種用于測(ce)量電(dian)(dian)力參(can)(can)數(shu)(shu)的設(she)備,它(ta)可以測(ce)量電(dian)(dian)壓、電(dian)(dian)流、功率、功率因數(shu)(shu)、電(dian)(dian)能等(deng)多種參(can)(can)數(shu)(shu),使(shi)用三項多功能電(dian)(dian)力儀表的方法如下:
1、安裝方法
(1)在固定的配電(dian)柜上,選(xuan)擇(ze)合適的地(di)方開一個開孔尺寸的安(an)裝孔。
(2)取出儀(yi)表,松開定(ding)位螺(luo)絲,取下固(gu)定(ding)夾。
(3)將儀表安裝插入配電(dian)柜的儀表孔中(zhong)。
(4)插入儀(yi)表(biao)的固定夾,固定定位螺絲。
2、接線方法
三相多功(gong)能電(dian)(dian)(dian)(dian)力(li)(li)儀(yi)表的接(jie)線(xian)(xian)(xian)(xian)(xian)方法(fa)一般分為兩種:直接(jie)接(jie)線(xian)(xian)(xian)(xian)(xian)和互(hu)(hu)感(gan)器(qi)接(jie)線(xian)(xian)(xian)(xian)(xian)。直接(jie)接(jie)線(xian)(xian)(xian)(xian)(xian)是將(jiang)(jiang)電(dian)(dian)(dian)(dian)力(li)(li)儀(yi)表的電(dian)(dian)(dian)(dian)源(yuan)線(xian)(xian)(xian)(xian)(xian)、電(dian)(dian)(dian)(dian)流(liu)線(xian)(xian)(xian)(xian)(xian)、電(dian)(dian)(dian)(dian)壓(ya)線(xian)(xian)(xian)(xian)(xian)直接(jie)接(jie)入(ru)(ru)電(dian)(dian)(dian)(dian)源(yuan)、負載(zai)等電(dian)(dian)(dian)(dian)路中(zhong),適用(yong)于小(xiao)功(gong)率電(dian)(dian)(dian)(dian)路。互(hu)(hu)感(gan)器(qi)接(jie)線(xian)(xian)(xian)(xian)(xian)是將(jiang)(jiang)電(dian)(dian)(dian)(dian)力(li)(li)儀(yi)表的電(dian)(dian)(dian)(dian)源(yuan)線(xian)(xian)(xian)(xian)(xian)、電(dian)(dian)(dian)(dian)流(liu)線(xian)(xian)(xian)(xian)(xian)、電(dian)(dian)(dian)(dian)壓(ya)線(xian)(xian)(xian)(xian)(xian)分別接(jie)入(ru)(ru)互(hu)(hu)感(gan)器(qi)中(zhong),再將(jiang)(jiang)互(hu)(hu)感(gan)器(qi)接(jie)入(ru)(ru)電(dian)(dian)(dian)(dian)源(yuan)、負載(zai)等電(dian)(dian)(dian)(dian)路中(zhong),適用(yong)于大功(gong)率電(dian)(dian)(dian)(dian)路。
3、參數設置
在(zai)使用(yong)(yong)三相多功能電(dian)力儀(yi)(yi)表之前,需要對其進行參(can)(can)數(shu)(shu)設(she)置(zhi)。參(can)(can)數(shu)(shu)設(she)置(zhi)包括電(dian)壓、電(dian)流、功率(lv)因數(shu)(shu)、電(dian)能等參(can)(can)數(shu)(shu)的設(she)定。一般情況下(xia),電(dian)力儀(yi)(yi)表會有(you)一個(ge)菜單(dan)界面,用(yong)(yong)戶可以通過(guo)菜單(dan)界面進行參(can)(can)數(shu)(shu)設(she)置(zhi)。
4、數據讀取
三相多功能(neng)電(dian)力(li)儀(yi)表可以通過顯示(shi)(shi)屏顯示(shi)(shi)電(dian)壓、電(dian)流、功率、功率因數(shu)、電(dian)能(neng)等(deng)參數(shu)的數(shu)值。此外(wai),電(dian)力(li)儀(yi)表還可以通過通訊(xun)接(jie)口將數(shu)據傳輸到計算機等(deng)設(she)備中,以便進行數(shu)據分析和處理。
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注意(yi)的事(shi)項有很多,包括:
1、使用(yong)前,儀表(biao)需通電15分鐘(zhong)。
2、注意(yi)防(fang)止震動(dong)和沖擊,不(bu)要在(zai)有(you)超(chao)量灰塵和超(chao)量有(you)害(hai)氣體(ti)的地方使用。
3、輸(shu)入導線不宜過長,如被測信號輸(shu)入端較長時(shi)請試用雙絞屏蔽線。
4、若信號(hao)伴隨高頻干擾,應在線里(li)試用低頻過濾(lv)器。
5、長時間存放(fang)未(wei)使用(yong)時,請每三個月通電一次不少于4小時。
6、長(chang)期(qi)保(bao)存應避開(kai)直射(she)光線,宜存放在環境溫度-25°C~55°C.
7、如儀表無顯示,應先(xian)檢查輔助電(dian)源,電(dian)壓是否在范圍內。
8、如顯示不正常(chang)(chang),檢查輸入(ru)信號(hao)是否(fou)正常(chang)(chang)及(ji)信號(hao)接線端是否(fou)擰緊。
9、除非PT有足夠功(gong)率,否(fou)則不能使用PT信號同(tong)時作為輔助電(dian)源,以(yi)保證儀表正(zheng)常工作。
10、CT回路(lu)中的電(dian)流接線端子螺絲務(wu)必擰緊(jin),保證進(jin)/出(chu)線接觸可靠,以免(mian)產(chan)生故障(zhang)。
11、若要校驗(yan)儀表,校驗(yan)儀器應優于0.1級,才能(neng)保(bao)證(zheng)校驗(yan)精度。