變(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)：簡單(dan)的(de)說，變(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)就是利用交變(bian)(bian)電(dian)(dian)(dian)(dian)磁場來實現(xian)(xian)不(bu)同(tong)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)等(deng)級轉換(huan)的(de)設備（實際上(shang)是電(dian)(dian)(dian)(dian)能(neng)的(de)轉換(huan)），其(qi)變(bian)(bian)換(huan)前后的(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)不(bu)發生頻率上(shang)的(de)變(bian)(bian)化(hua)。按照其(qi)用途變(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)可以分很(hen)多種，如電(dian)(dian)(dian)(dian)力變(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)、整(zheng)流(liu)變(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)、調壓(ya)(ya)(ya)器(qi)(qi)(qi)、隔離變(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)，以及CT、PT等(deng)。我(wo)們(men)在工程現(xian)(xian)場經(jing)常遇到(dao)的(de)是電(dian)(dian)(dian)(dian)力三相隔離變(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)。隨著我(wo)國經(jing)濟(ji)經(jing)濟(ji)水平(ping)的(de)提(ti)升和市(shi)場開放(fang)程度及市(shi)場化(hua)進程的(de)日益(yi)深化(hua)，變(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)(qi)作為輸變(bian)(bian)電(dian)(dian)(dian)(dian)系統中的(de)主要(yao)設備得到(dao)了長足發展。

按(an)照(zhao)其(qi)用(yong)途變壓器(qi)可以(yi)分很(hen)多種，如(ru)電(dian)力(li)變壓器(qi)、整流變壓器(qi)、調壓器(qi)、隔(ge)離(li)(li)變壓器(qi)，以(yi)及CT、PT等。我們在(zai)工程現場(chang)經常遇到的(de)是電(dian)力(li)三相隔(ge)離(li)(li)變壓器(qi)。中國(guo)變壓器(qi)行(xing)業走向“節能低噪智能”：隨著我國(guo)“節能降耗(hao)”政策的(de)不斷深入，國(guo)家(jia)鼓(gu)勵發(fa)展節能型、低噪音(yin)、智能化的(de)配電(dian)產(chan)品(pin)。隔(ge)離(li)(li)變壓器(qi)的(de)安全作(zuo)用(yong)：隔(ge)離(li)(li)變壓器(qi)作(zuo)用(yong)就是把兩相電(dian)隔(ge)離(li)(li)開來，防止觸電(dian)事故的(de)發(fa)生。隔(ge)離(li)(li)變壓器(qi)屬于(yu)安全電(dian)源，一般(ban)用(yong)來機器(qi)維修保養用(yong)起保護、防雷、濾波作(zuo)用(yong)。

較為節能的(de)電(dian)力變(bian)壓(ya)(ya)器(qi)是(shi)非晶合金鐵心配電(dian)變(bian)壓(ya)(ya)器(qi)，單相變(bian)壓(ya)(ya)器(qi)，其優點是(shi)，空載損(sun)耗值特低。終能否確保(bao)空載損(sun)耗值，是(shi)整個(ge)設計(ji)過程(cheng)(cheng)中所要考慮的(de)問題(ti)。在(zai)市場(chang)國(guo)際(ji)(ji)化(hua)發展的(de)進程(cheng)(cheng)中，我(wo)國(guo)變(bian)壓(ya)(ya)器(qi)行(xing)業雖(sui)在(zai)小容(rong)量(liang)領域已擁有相當的(de)實力，并在(zai)國(guo)際(ji)(ji)市場(chang)中占據重(zhong)要地位。隨著(zhu)我(wo)國(guo)經(jing)濟經(jing)濟水平的(de)提升和(he)市場(chang)開放程(cheng)(cheng)度及市場(chang)化(hua)進程(cheng)(cheng)的(de)日益深化(hua)，變(bian)壓(ya)(ya)器(qi)作為輸(shu)變(bian)電(dian)系統中的(de)主要設備得到了長(chang)足發展。