we can choose different protective shell for dry type transformer according to the  environmental characteristics and protection requirements. Type of protection IP20 dry type transformer enclosure is usually used to prevent a diameter greater than 12 mm of solid foreign bodies and mice, snakes, cats, birds and other small animals such as power outages caused by a vicious short-circuit failure to provide security for the live part of the barrier. If the dry type transformer needs to be installed outdoors, you can choose type of protective enclosure IP23. Besides the protection function of IP20, IP23 dry type transformer also prevents the vertical angle of 60 ° within the water droplets into. But the type of protective enclosure IP23 of dry type transformer cooling capacity and the operating capacity will slightly lower.