"Waterproof Cooling Fan" is mainly used for dry-type transformer cooling capacity increase and cool-down electronic equipment, power distribution cabinets, high and low voltage switch gear and other products and so on. Use the series "Waterproof Cooling Fan" can increase the output power of 40-50% dry-type transformers, which can greatly improve the carrying capacity of dry-type transformers, and extend the life of dry-type transformers, it is the most widely used by domestic and foreign manufacturers cost-effective manner. "Waterproof Cooling Fan" when used in dry-type transformers, fans placed on both sides of the lower portion of the transformer coil, the coil transformer blowing cold air directly high and low pressure cooling duct, cooling effect is obvious, can guarantee the normal operation of the transformer and extend its use life. (Fan open, stop and transformer over-temperature alarm, over-temperature trip provided with temperature control and other functions).