Dry-type vs Liquid-type transformers – what’s an ideal transformer for you

Dry-type vs Liquid-type transformers – what’s an ideal transformer for you

Transformers play an essential role in modern power distribution, allowing us to adjust voltage levels as needed for various applications. Whether it’s stepping down voltage for small devices or stepping up for long-distance transmission, transformers are the backbone of electricity management. We’ll focus on the two prominent types of transformers: dry-type and liquid-filled transformers.

Dry-type transformers

Dry-type transformers prioritize safety by using ambient air for cooling during voltage conversion. This dynamic interplay of integrated air circulation and fire-resistant insulation minimizes overheating risks. Suitable for small to medium-voltage needs in utility, industrial, and commercial sectors, they feature enclosed copper or aluminum windings. Some of them are also made using VPI epoxy and cast resin for tougher environmental conditions.

Liquid-type transformers

Liquid-filled transformers adopt a different cooling mechanism, using insulating oil or other fluids like silicone for efficient heat dissipation. The inclusion of cooling mechanisms like fans helps manage temperatures effectively, extending the lifespan of the transformer. Liquid-filled transformers are especially suitable for medium and high-voltage applications, providing a quieter and more energy-efficient solution.

Key differences

Maintenance: Liquid-filled transformers demand more maintenance due to regular liquid testing and filtration. Dry-type transformers are chemically resistant and require less maintenance plus are easier to install.

Operational Cost: Contrary to expectations, liquid-filled transformers are more cost-effective due to their energy efficiency.

Environment: Dry-type transformers have lower environmental pollution and no risk of leaks or spills unlike liquid-filled transformers

Recyclability – Dry-type transformers have restricted coil recycling at the end of their service life, whereas oil units have a much easier core recycling.

Location: Liquid-filled transformers are typically installed outdoors due to the risk of oil spills, while dry-types are safe for indoor use.

Transformer (the more stars the better)Dry-typeLiquid-type
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Knowing whether a dry-type or liquid-type transformer is better depends on your application, safety requirements, infrastructure, and budget. At the end of the day, they both have pros and cons and it depends on your situation.

Looking for dry-type or liquid-type transformers?

At TTES we deliver both types of transformers at an unrivaled speed of just 20 weeks across all of the USA. All our transformers come with a 2-year warranty. Request a free quote and get your transformers shipped to your location in just 20 weeks!

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