Protection of dry - type transformers

Usually IP20 protective shell, to prevent the solid foreign body greater than 12mm in diameter and rats, snakes, cats, birds and other small animals to enter, resulting in a short-circuit power failure and other malignant failure, to provide security for the live part of the barrier. If you need to install the 100kva distribution transformer in the outdoors, you can choose IP23 protective shell, in addition to the IP20 protection, but also to prevent the vertical line into a 60 ° angle within the water droplets into. But the IP23 shell will reduce the cooling capacity of the single phase pole mounted transformers, the choice should pay attention to the reduction of its operating capacity