IP rating, how much do you know?

       At present, with the continuous improvement of people's living standards, people's demand for electricity is gradually increasing. As a result, dry-type transformers are often operated in an overloaded state, with temperatures accumulating and not easily evaporating. In addition, foreign matter is frequently involved during the operation of dry-type transformers. , causing the dry-type transformer to malfunction, which in turn affects the normal satisfaction of people's electricity needs. The casing of the dry-type transformer can effectively prevent foreign matter from getting involved during the operation of the dry-type transformer, and can ensure that the dry-type transformer can provide efficient, stable, continuous and reliable power supply, and its application value has gradually become apparent.

      According to the different use occasions of dry-type transformers, the shells of dry-type transformers can be divided into two types: indoor transformer shells and outdoor transformer shells. Dry-type transformers are divided into IP20-IP40 protection levels. Each protection level has different protection functions, and the shapes and sizes of foreign objects that can be protected are also different. In order to prevent the entry of solid foreign objects with a diameter greater than 12mm or the intrusion of small animals such as mice and rabbits, the casing of dry-type transformers placed indoors is usually IP20 standard. It can be used as a safety barrier for the live part of the dry-type transformer to ensure the good operation of the dry-type transformer without interruption. In order to prevent water dripping within an angle of 60° from the vertical line, the casing of a dry-type transformer placed indoors is usually IP23 standard. ip23 has the performance of ip20. ip30 can prevent the entry of spherical foreign objects with a diameter greater than 2.5mm; ip31 has ip30 performance and can prevent vertical water droplets from entering; ip33 has ip30 performance and can prevent the entry of water within an angle of 60° with the vertical line; ip40 can prevent diameter It has a dust-proof effect when linear objects larger than 1mm enter. IPOO is a transformer without enclosure. According to the requirements of the national standard 4208, if the protection level of the dry-type transformer's shell is above IP30, a screen must be installed behind the dry-type transformer shell to prevent rodents and other small animals or foreign objects from entering. Whether the dry-type transformer shell is placed indoors or outdoors, its essence is to isolate the dry-type transformer from the outside world.Therefore, it can effectively prevent people from being too close to the dry-type transformer, thereby avoiding electric shock accidents and ensuring the safety of people using electricity.

     the different materials of dry-type transformer shells, dry-type transformer shells can be divided into three categories: aluminum alloy grinding plate transformer shells, stainless steel transformer shells and steel plate spray-coated transformer shells.

Because the dry-type transformer is surrounded by a shell to prevent it from being directly exposed to the natural environment, it can effectively protect the dry-type transformer from damage by natural factors. Dry-type transformers are prone to spontaneous combustion if they are subject to rain erosion, wind and sun exposure, etc. The installation of an outer casing can prevent the dry-type transformer from being damaged by rain erosion, wind and sun exposure, etc., thus delaying the dry-type transformer from being damaged due to long-term use. The time it takes to be damaged due to exposure to the natural environment increases the operating life of dry-type transformers.