Dry-type distribution transformers & air-cooled transformers

Dry-type or ‘air-cooled’ distribution transformers are considered a low maintenance, reliable, and robust solution due to the fact that they have no moving (or serviceable) parts.

Powerstar has manufactured and supplied dry-type transformers for a wide range of industrial, commercial & hazardous applications. Due to the reliability, efficiency and long service life of our dry-type transformers, they are an excellent long-term investment that can deliver massive energy and cost savings.

Unlike their oil-filled counterparts, an air-cooled distribution transformers use only non-toxic, environmentally safe insulation systems, making them more eco-friendly as they pose no oil leak or pollution risk to the environment. The modern insulation systems and materials utilised in these transformers are Class F (155C), H (180C) and C (220C) depending on the applications & size constraints.

We manufacture transformers from 1kVA through 10,000kVA with system volts to 22kV, all systems are built & tested to industry standards (UK) EN60076, (US & Canada) UL506 & 1561, or any customer required standard.

Versatile  distribution transformers for specialist applications

As we deliver our distribution transformers based on each customer’s requirements in addition to the fact they do not contain oil, there are virtually no restrictions on the installation site. The risk of them creating a fire hazard is minimal, meaning they can be located closer to load, reducing cabling costs and losses. Due to their low flammability, they are widely used for data centres, for inclusion in customer equipment, environmentally sensitive, marine, offshore & hazardous areas.

Dry-type transformers can be manufactured to be suitable for both indoor or outdoor applications (an enclosure is provided for outdoor sites with a site-specific IP rating) depending on the characteristics and requirements of your site.

Things to remember

Despite the features that give dry-type transformers an edge, there are some factors that should be taking into account if you are considering one for your site. Due to the long service-life, these types of distribution transformer are robustly made which can make them a more costly long-term option.

If you are considering implementing a dry-type transformer on your site, or if you’re looking to replace an outdated transformer get

Contact us to find out more
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dry type transformers

What are the advantages of dry-type transformers?

When it comes to what options you choose for your site’s power grid, dry-type distribution transformers have a number of advantages. Compared to other types of distribution transformers like oil-filled transformers and cast-resin transformers, the main things that set dry-type transformers are:

  • Greatly reduced on-going maintenance costs. 
  • Depending on the design, load, and maintenance, a dry-type transformer can have a long service lifespan of 25-years.
  • Dry-type transformers are oil-free, meaning they don’t carry the risks of leaking hazardous fluids and the fire risk significantly lower.
  • At the end of its service life, parts from the transformer can be easily recycled.
  • Due to not having a hanging-core, this type of transformer can be fitted into a much more compact space.
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