How to divide the protection grade of dry-type transformer S

The dry-type transformer Shell can protect the transformer body from external objects and prevent personal electricity. Protection levels are in the form of IP00, IP20, and IP23. IP00 is a transformer without a housing. The IP20 is a transformer with a housing which can prevent solid foreign matter larger than 12mm from entering. The enclosure of IP23 not only has the function of the enclosure of IP20, but also can prevent the inflow of water drops at an angle of 60 ° to the vertical direction.

　　The shell of dry-type transformer is mainly used for the safety protection of running transformer on site. Avoid because of small animals and other foreign matter into the transformer operation accident. Can effectively protect personal safety and play a certain role in electromagnetic shielding. The dry-type transformer housings can be divided into three types according to the different structural materials: Aluminum Alloy ground plate transformer housings, stainless steel transformer housings and steel plate sprayed transformer housings. Dry-type transformer shell according to the use of different occasions: Indoor Transformer Shell and outdoor transformer shell two. Dry-type transformer shell protection grade is divided into: IP20, IP21, IP23, IP30, IP31, IP33 and other specifications. Dry-type transformer shell protection classification description code description 1, IP20 can prevent the diameter of more than 12.5 mm spherical foreign body to enter, for live parts to provide a safety barrier; 2, IP21 with IP20 performance, iP23 has the property of IP20, and it can prevent the water from falling into the range of 60 ° angle with the vertical line. 4, IP30 can prevent the foreign body with diameter larger than 2.5 mm from entering 5、 IP31 has IP30 performance and can prevent vertical water drop from entering; 6、 IP33 has IP30 performance and can prevent water from falling into the range of 60 ° angle with vertical line; IP40 can prevent the entry of linear objects larger than 1mm in diameter and has dust-proof effect.