Outdoor enclosures for dry-type transformers

At TMC Transformers, we have engineered a robust and reliable solution for the outdoor installation of dry-type transformers - without compromising performance, safety, or longevity.

Over the years, our R&D and engineering teams have developed a comprehensive system of protective enclosures and advanced cooling technologies that allow our transformers to operate efficiently even in the most challenging outdoor environments.

Engineered protection enclosures

Outdoor conditions demand more than just weather resistance—they require engineered protection. TMC designs and manufactures custom protective enclosures with a wide range of Ingress Protection (IP) ratings, from IP21 to IP67, depending on the environmental and application-specific requirements. Each enclosure is designed to:

• Shield the transformer from dust, water, humidity, and corrosive agents.
• Ensure mechanical protection against impacts and external objects.
• Maintain internal thermal stability while minimizing exposure to external air.

The choice of IP rating is based on a detailed analysis of the installation site, including climate, altitude, pollution level, and ventilation constraints. Our engineering team works closely with clients to define the optimal configuration for each project.

Guide to transformer IP enclosure types

• IP21: suitable for indoor use with minimal exposure to moisture.
• IP23: often used in semi-protected outdoor environments.
• IP34/44: suitable for more exposed outdoor areas as industrial and infrastructure applications.
• IP55: ideal for harsh outdoor environments with high exposure to dust and rain.
• IP67: designed for extreme conditions where temporary submersion or complete sealing against fine dust is required.