變(bian)(bian)壓(ya)(ya)器(qi)(qi)分(fen)接（抽頭）的(de)(de)(de)概念：為適合電(dian)(dian)(dian)(dian)(dian)(dian)網運行需要，三(san)相(xiang)交流穩(wen)壓(ya)(ya)器(qi)(qi)價(jia)格一般的(de)(de)(de)變(bian)(bian)壓(ya)(ya)器(qi)(qi)高(gao)壓(ya)(ya)側(ce)都有(you)抽頭，三(san)相(xiang)交流電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)價(jia)格這些抽頭的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)值都是(shi)(shi)用額定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)(de)(de)百分(fen)比(bi)表示(shi)的(de)(de)(de)，即所謂(wei)的(de)(de)(de)分(fen)接電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)。額定(ding)容(rong)量是(shi)(shi)一個表現功率的(de)(de)(de)慣(guan)用值，它(ta)是(shi)(shi)表征傳輸(shu)電(dian)(dian)(dian)(dian)(dian)(dian)能的(de)(de)(de)大小，以kVA或MVA表示(shi)，當對變(bian)(bian)壓(ya)(ya)器(qi)(qi)施加(jia)額定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)時，根據它(ta)來確定(ding)在(zai)規定(ding)條(tiao)件下不超(chao)過溫(wen)升限(xian)值的(de)(de)(de)額定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)流。一般常(chang)用電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)變(bian)(bian)壓(ya)(ya)器(qi)(qi)按相(xiang)數分(fen)：(1)單相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)變(bian)(bian)壓(ya)(ya)器(qi)(qi)：用于單相(xiang)負荷和三(san)相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)變(bian)(bian)壓(ya)(ya)器(qi)(qi)組。(2)三(san)相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)變(bian)(bian)壓(ya)(ya)器(qi)(qi)：用于三(san)相(xiang)系統的(de)(de)(de)升、降電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)。

電(dian)力(li)變壓器是常見的(de)變壓器之一(yi)，它的(de)冷(leng)卻方式并不(bu)單一(yi)。它常用(yong)的(de)冷(leng)卻方式一(yi)般分為三種(zhong)：油(you)浸自(zi)冷(leng)式、油(you)浸風冷(leng)式、強(qiang)迫油(you)循環(huan)。盡管我國(guo)配電(dian)變壓器行(xing)業競爭激烈，但對具有(you)新技(ji)術、新材(cai)料、新工(gong)藝的(de)生產企業來(lai)說(shuo)機遇大于挑戰。未來(lai)將逐步被(bei)節(jie)(jie)能(neng)、節(jie)(jie)材(cai)、環(huan)保、低(di)噪(zao)音的(de)變壓器所取代(dai)(dai)。目前在(zai)網運行(xing)的(de)部分高能(neng)耗配電(dian)變壓器已不(bu)符(fu)合行(xing)業發展趨勢(shi)，面(mian)臨著技(ji)術升(sheng)級、更新換(huan)代(dai)(dai)的(de)需(xu)求，未來(lai)將逐步被(bei)節(jie)(jie)能(neng)、節(jie)(jie)材(cai)、環(huan)保、低(di)噪(zao)音的(de)變壓器所取代(dai)(dai)。

未來(lai)幾年(nian)，大(da)型(xing)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)，電(dian)網(wang)(wang)建(jian)設和(he)城鄉配電(dian)網(wang)(wang)改造仍是(shi)我國電(dian)力工(gong)業的首要任務，配電(dian)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)的市(shi)場需求量(liang)有(you)望保持較(jiao)強(qiang)勁的增(zeng)漲。額定容量(liang)是(shi)一個表現功率的慣(guan)用值，它(ta)是(shi)表征傳(chuan)輸電(dian)能的大(da)小，以kVA或MVA表示，當對變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)施加(jia)額定電(dian)壓(ya)(ya)(ya)時(shi)，根據它(ta)來(lai)確定在規定條件下不超(chao)過(guo)溫升(sheng)限(xian)值的額定電(dian)流。盡管我國配電(dian)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)行業競爭(zheng)激(ji)烈(lie)，但對具(ju)有(you)新技術、新材料(liao)、新工(gong)藝的生產企業來(lai)說機遇大(da)于挑(tiao)戰。未來(lai)將逐步被節(jie)能、節(jie)材、環(huan)保、低噪音的變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)所取代(dai)。