SG10 type H class insulation dry power transformer has the features of strong ability withstand thermal shock, strong ability of overload, flame-retardant, fire-proof, low loss, low partial discharge, low noise, do not produce the harmful gas, pollution-free, not sensitive to the humidity and dust, small size, no crack, easy maitenance. And therefore it is espeically suitable for the severe polluted environment where the requirement of fire-proof, and load flunctuation is high, such as airport, power plant, metallurgical operations, hospitals, skyscraper, shopping center, densely populated areas, oil, chemical, nuclear power stations, nuclear submarines and so on.