Dry Cast Resin Transformers Shell Classification
The exterior protects the dry cast resin transformers body from the impact of foreign objects and prevents human induction. The degree of protection is IP 00, IP 20, IP 23. IP 00 is a dry-type transformer without an enclosure. IP 20 is a dry cast resin transformers with an enclosure, which can prevent the intrusion of solid foreign objects over 12 mm. In addition to the functions of the IP 20 housing, the IP 23 housing can prevent the inflow of water droplets in the vertical direction and at an angle of 60°.
The outer packaging of the dry cast resin transformers is mainly used for the safety protection of the transformer site. When small animals or other foreign objects enter the dry type transformer, please do not cause an operation accident. It can effectively protect personal safety and play a certain role in electromagnetic shielding.
Dry cast resin transformerss are divided into three types according to the material of construction. The shell of aluminum alloy ground dry type transformer, the shell of stainless steel dry type transformer, and the shell of steel plate sprayed transformer.
The shell of the dry cast resin transformers is divided into the shell of the indoor transformer and the shell of the outdoor transformer according to the different places of use.
The external protection level of dry-type transformers is divided into IP 20, IP 21, IP 23, IP 30, IP 31, IP 33 and other standards.
Explanation of the classification codes for the protection class of deformed shells
IP 20 prevents the intrusion of spherical foreign objects with a diameter of 12.5 mm or more and provides a safety barrier to the charging unit.
IP 21 has the performance of IP 20 and is able to prevent the intrusion of vertical water droplets.
IP 23 has the performance of IP 20 while preventing water from entering vertical lines and 60° angles.
IP 30 protects against the intrusion of spherical foreign bodies over 2.5 mm in diameter.
IP 31 has the performance of IP 30 and is resistant to the intrusion of vertical water droplets.
IP 33 has the performance of IP 30. At the same time, water can be prevented from entering the vertical line and the range of 60 ° angle.
IP 40 prevents the intrusion of linear objects with a diameter of 1 mm or more, and has a dust-proof effect.
