变压器充氮灭火装置是用于发电厂、变电站容量在2MVA以上大型油浸式电力变压器的灭火消防一种装置，又叫排油注氮防火灭火装置。该装置集火灾探测、报警、灭火系统于一身，起动后可立即灭火，有效的防止火灾蔓延及复燃。

Transformer nitrogen fire extinguishing device is a fire extinguishing and fire fighting device for large oil immersed power transformers, which is more than 2MVA in power plants and substations. It is also called oil drain, nitrogen injection and fire extinguishing device. The device set fire detection and alarm, fire extinguishing system in a body, starting immediately after the fire, effectively prevent the spread of fire and again.