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　　變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)是(shi)用(yong)于轉換(huan)交(jiao)(jiao)流電(dian)(dian)(dian)流、電(dian)(dian)(dian)流量(liang)而傳送(song)溝(gou)通交(jiao)(jiao)流電(dian)(dian)(dian)能的(de)(de)一種(zhong)靜止不動的(de)(de)電(dian)(dian)(dian)氣設備。它是(shi)依據電(dian)(dian)(dian)流的(de)(de)磁效應(ying)的(de)(de)基本原理完成(cheng)電(dian)(dian)(dian)能傳送(song)的(de)(de)。變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)就(jiu)其主要(yao)用(yong)途可(ke)分成(cheng)電(dian)(dian)(dian)力變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)、試驗變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)、儀用(yong)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)及獨特(te)主要(yao)用(yong)途的(de)(de)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)：電(dian)(dian)(dian)力變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)是(shi)電(dian)(dian)(dian)力工程輸變(bian)(bian)(bian)(bian)(bian)電(dian)(dian)(dian)、電(dian)(dian)(dian)力工程客戶配(pei)電(dian)(dian)(dian)設備的(de)(de)必需機器(qi)(qi)(qi)(qi)(qi)設備;試驗變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)對(dui)電(dian)(dian)(dian)氣設備開(kai)展抗壓(ya)(ya)(ya)(ya)(變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya))實驗的(de)(de)機器(qi)(qi)(qi)(qi)(qi)設備;儀用(yong)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)做為配(pei)電(dian)(dian)(dian)系統的(de)(de)電(dian)(dian)(dian)氣設備精確測量(liang)、繼電(dian)(dian)(dian)保護裝置(zhi)的(de)(de)用(yong)處(PT、CT);獨特(te)主要(yao)用(yong)途的(de)(de)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)有冶煉廠(chang)用(yong)加熱爐變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)、電(dian)(dian)(dian)弧焊(han)接變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)、電(dian)(dian)(dian)解法(fa)用(yong)整(zheng)流器(qi)(qi)(qi)(qi)(qi)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)、中小(xiao)型變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)變(bian)(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)(ya)器(qi)(qi)(qi)(qi)(qi)等。

　　電(dian)(dian)(dian)(dian)力(li)(li)變(bian)(bian)壓(ya)(ya)器(qi)是(shi)(shi)(shi)(shi)一(yi)(yi)種靜止不(bu)動的(de)(de)(de)電(dian)(dian)(dian)(dian)器(qi)設備，是(shi)(shi)(shi)(shi)用(yong)于將某一(yi)(yi)標值(zhi)的(de)(de)(de)交(jiao)流(liu)(liu)電(dian)(dian)(dian)(dian)流(liu)(liu)(電(dian)(dian)(dian)(dian)流(liu)(liu)量(liang))變(bian)(bian)為頻(pin)率(lv)同(tong)樣的(de)(de)(de)另一(yi)(yi)種或幾類標值(zhi)不(bu)一(yi)(yi)樣的(de)(de)(de)工作電(dian)(dian)(dian)(dian)壓(ya)(ya)(電(dian)(dian)(dian)(dian)流(liu)(liu)量(liang))的(de)(de)(de)機(ji)器(qi)設備。當一(yi)(yi)次繞組通(tong)以交(jiao)流(liu)(liu)電(dian)(dian)(dian)(dian)流(liu)(liu)時(shi)(shi)(shi)，就(jiu)(jiu)造成交(jiao)替(ti)(ti)變(bian)(bian)化(hua)的(de)(de)(de)磁(ci)通(tong)量(liang)，交(jiao)替(ti)(ti)變(bian)(bian)化(hua)的(de)(de)(de)磁(ci)通(tong)量(liang)根據變(bian)(bian)壓(ya)(ya)器(qi)鐵芯(xin)吸磁(ci)功(gong)效(xiao)，就(jiu)(jiu)在二次繞組中磁(ci)感(gan)應(ying)出溝通(tong)交(jiao)流(liu)(liu)感(gan)應(ying)電(dian)(dian)(dian)(dian)動勢。二次感(gan)應(ying)電(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)(de)多少(shao)與一(yi)(yi)二次繞組線圈匝(za)數的(de)(de)(de)是(shi)(shi)(shi)(shi)多少(shao)相關，即工作電(dian)(dian)(dian)(dian)壓(ya)(ya)尺寸(cun)與線圈匝(za)數正相關。關鍵功(gong)效(xiao)是(shi)(shi)(shi)(shi)傳送(song)電(dian)(dian)(dian)(dian)能，因(yin)而，短路容(rong)量(liang)是(shi)(shi)(shi)(shi)它(ta)(ta)的(de)(de)(de)基本參(can)數。短路容(rong)量(liang)是(shi)(shi)(shi)(shi)一(yi)(yi)個主要(yao)(yao)表現輸(shu)出功(gong)率(lv)的(de)(de)(de)常用(yong)值(zhi)，它(ta)(ta)是(shi)(shi)(shi)(shi)表現傳送(song)電(dian)(dian)(dian)(dian)能的(de)(de)(de)尺寸(cun)，以kVA或MVA表明，當對變(bian)(bian)壓(ya)(ya)器(qi)增加(jia)額定(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)時(shi)(shi)(shi)，依(yi)據它(ta)(ta)來明確在要(yao)(yao)求標準下不(bu)超(chao)過溫升限值(zhi)的(de)(de)(de)額定(ding)電(dian)(dian)(dian)(dian)壓(ya)(ya)。比(bi)較環(huan)保節(jie)能的(de)(de)(de)電(dian)(dian)(dian)(dian)力(li)(li)變(bian)(bian)壓(ya)(ya)器(qi)是(shi)(shi)(shi)(shi)非(fei)晶合(he)金鐵芯(xin)配(pei)電(dian)(dian)(dian)(dian)設備變(bian)(bian)壓(ya)(ya)器(qi)，其較大(da) 優勢是(shi)(shi)(shi)(shi)，滿載耗(hao)損值(zhi)特低。最后(hou)能不(bu)能保證滿載耗(hao)損值(zhi)，是(shi)(shi)(shi)(shi)全(quan)部設計過程中所需考慮(lv)到的(de)(de)(de)關鍵難題。當在產品構(gou)造布局(ju)時(shi)(shi)(shi)，除要(yao)(yao)考慮(lv)到非(fei)晶合(he)金鐵芯(xin)自身不(bu)會受(shou)到外(wai)力(li)(li)的(de)(de)(de)作用(yong)外(wai)，與此(ci)同(tong)時(shi)(shi)(shi)在預(yu)估時(shi)(shi)(shi)還須精準有效(xiao)選擇非(fei)晶合(he)金的(de)(de)(de)特性(xing)主要(yao)(yao)參(can)數。