干式變壓器的安全運行對其溫度有一定的規定。當運行溫度超過一定限值時，會影響干式變壓器的使用性能。因此，干式變壓器的生產將采用冷卻裝置。干式變壓器常用的冷卻方式有自然風冷(AN)和強制風冷(AF)。在自然風冷中，變壓器可以在額定容量下長時間連續運行。強制風冷時，變壓器輸出容量可提高50%。適用于間歇過載運行或緊急過載運行;由于過載時負載損耗和阻抗電壓增加較大，處于不經濟運行狀態，不宜長時間連續過載運行。

　　干式變壓器冷(leng)(leng)卻方式分自然空氣冷(leng)(leng)卻和強迫空氣冷(leng)(leng)卻兩種。

　　當(dang)采用自(zi)然空氣冷卻時(shi)(shi)，變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)正常運(yun)(yun)行(xing)(xing)時(shi)(shi)需要(yao)合(he)適的(de)(de)通(tong)(tong)風(feng)(feng)(feng)量，一(yi)(yi)般變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)每(mei)1kW損耗，需要(yao)4m3/min的(de)(de)通(tong)(tong)風(feng)(feng)(feng)量，此時(shi)(shi)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)可連(lian)續輸(shu)出(chu)100%額定容(rong)量。因此當(dang)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)安(an)裝(zhuang)于地(di)下室(shi)或其他(ta)通(tong)(tong)風(feng)(feng)(feng)條(tiao)件較差(cha)的(de)(de)環(huan)(huan)境時(shi)(shi)，應采取強(qiang)迫風(feng)(feng)(feng)冷(機(ji)械(xie)通(tong)(tong)風(feng)(feng)(feng))。當(dang)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)配(pei)帶(dai)外殼時(shi)(shi)，冷卻能力降低，為保證(zheng)冷卻空氣的(de)(de)流通(tong)(tong)，800kV .A及(ji)以(yi)下的(de)(de)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)底(di)(di)部至(zhi)(zhi)少(shao)離(li)地(di)板150mm ， 800kV . A以(yi)上(shang)、1600kV . A以(yi)下的(de)(de)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)底(di)(di)部則(ze)至(zhi)(zhi)少(shao)離(li)地(di)200mm ; 1600kV . A以(yi)上(shang)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)底(di)(di)部至(zhi)(zhi)少(shao)離(li)地(di)240mm ，而(er)且(qie)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)輸(shu)出(chu)容(rong)量應根(gen)據其容(rong)量大小降低5%～10%左右。如果變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)負(fu)載(zai)率較高，而(er)且(qie)可能短時(shi)(shi)超(chao)載(zai)運(yun)(yun)行(xing)(xing)，則(ze)一(yi)(yi)定要(yao)配(pei)置低噪音(yin)輻流風(feng)(feng)(feng)扇或簾式風(feng)(feng)(feng)機(ji)。為避免(mian)風(feng)(feng)(feng)機(ji)頻(pin)繁(fan)起(qi)動，還應配(pei)置溫(wen)控器(qi)(qi)(qi)進行(xing)(xing)自(zi)動控制(zhi)。當(dang)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)安(an)裝(zhuang)于地(di)下室(shi)或其他(ta)通(tong)(tong)風(feng)(feng)(feng)條(tiao)件較差(cha)的(de)(de)環(huan)(huan)境時(shi)(shi)，可請暖通(tong)(tong)專業配(pei)合(he)設置集中風(feng)(feng)(feng)機(ji)加風(feng)(feng)(feng)管(guan)系統，對(dui)環(huan)(huan)境進行(xing)(xing)機(ji)械(xie)送排(pai)風(feng)(feng)(feng)，達到對(dui)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)(qi)降溫(wen)、散熱的(de)(de)效果。