冷卻介質：油浸式變壓器依靠油作為冷卻介質。干式變壓器依靠空氣對流進行冷卻。散熱方式：油浸式變壓器比干(gan)式變(bian)壓器(qi)(qi)散(san)熱(re)快(kuai)。從(cong)外觀(guan)上看(kan)，干(gan)式變(bian)壓器(qi)(qi)可(ke)以(yi)直接看(kan)到鐵芯和線圈(quan)，而(er)油式變(bian)壓器(qi)(qi)只(zhi)能看(kan)到變(bian)壓器(qi)(qi)外殼。鉛的形態不同(tong)。干(gan)式變(bian)壓器(qi)(qi)多(duo)采(cai)用硅橡膠(jiao)套管(guan)，油式變(bian)壓器(qi)(qi)多(duo)采(cai)用瓷(ci)套管(guan)。

干式變壓(ya)器(qi)容(rong)量(liang)和電(dian)(dian)壓(ya)不同，一般(ban)適用于配電(dian)(dian)，容(rong)量(liang)在(zai)1600KVA以下(xia)，電(dian)(dian)壓(ya)在(zai)10KV以下(xia)，部(bu)分達(da)到(dao)(dao)35KV電(dian)(dian)壓(ya)等級。但油變壓(ya)器(qi)從小到(dao)(dao)大(da)都(dou)能(neng)達(da)到(dao)(dao)滿容(rong)量(liang)，電(dian)(dian)壓(ya)等級也達(da)到(dao)(dao)所有電(dian)(dian)壓(ya)；中在(zai)建的UHV 1000千伏試驗(yan)線必須使用油變壓(ya)器(qi)。

絕緣和(he)散(san)熱不一樣。干(gan)式變(bian)壓(ya)(ya)(ya)(ya)器(qi)一般采(cai)用(yong)(yong)樹脂絕緣，自然風(feng)冷卻，大(da)容(rong)量風(feng)扇冷卻。油(you)型變(bian)壓(ya)(ya)(ya)(ya)器(qi)由絕緣油(you)絕緣，線圈(quan)產生的熱量通過變(bian)壓(ya)(ya)(ya)(ya)器(qi)內部絕緣油(you)的循(xun)環輻射到變(bian)壓(ya)(ya)(ya)(ya)器(qi)的散(san)熱器(qi)(片)。從應用(yong)(yong)場所來看，干(gan)式變(bian)壓(ya)(ya)(ya)(ya)器(qi)多用(yong)(yong)于(yu)需要(yao)“防火防爆”的場所，在大(da)型建(jian)筑和(he)高(gao)層建(jian)筑中容(rong)易使用(yong)(yong)；但油(you)變(bian)壓(ya)(ya)(ya)(ya)器(qi)在“事(shi)故”后可能會有油(you)噴出或泄漏，有可能引發(fa)火災。大(da)多用(yong)(yong)于(yu)室外，也有挖“事(shi)故油(you)池(chi)”的地方。承載能力不同。