This Institute has introduced the foreign most advanced technology and developed this TD arid air generator.It can be used to dry the air when giving the large repairs to the equipment of transformer, reactance device, oil switch and other large electric equipment so as to avoid the accident that the repair workers might be stifled to death due to lack of oxygen in the internal worksite.It is much safer and easier, more reliable and economic than using oxygen bottles.When conducting repairing operation, using TD arid air generator is not influenced by the changeable climate outside.The valves can be easily turned off if the working term is overnight.The oil equipment will not fill oil if using this generator to generate 0.02—0.03 Mpa and the transformer and reactance device will be kept from moisture, too.Thus, the working cost is reduced as it is no necessary to draw and fill oil everyday and the working term is largely shortened.The repairing quality is consequently enhanced.This generator can be used to make the oil and oil tank dry during the filtering operation of the oil equipment, too.It can reduce the moisture content when filtering oil in wet and moist weather to ensure the isolating grade of the oil.It can be used as air-conditioner in the rooms of worksite when standing-by.