Hermetically Sealed Distribution Transformers | Maintenance-Free Power Distribution

What Are Hermetically Sealed Distribution Transformers?

These transformers are completely sealed against air and moisture.

Their oil expansion is absorbed by flexible corrugated walls, preventing air from entering and keeping the oil oxidation-free.

How They Work

The sealed tank design eliminates the need for a conservator.

Because no air enters the system, oil aging is significantly reduced — extending transformer lifespan.

Advantages

• Completely maintenance-free

• No need for oil refilling

• Ideal for humid or dusty environments

• Compact and durable design

Typical Applications

• Rural energy networks

• Solar and wind energy plants

• Outdoor power distribution points

Nasaen Energy’s Approach

Nasaen Energy supplies hermetically sealed transformers designed for challenging outdoor conditions.

Every unit undergoes pressure and thermal testing before delivery, ensuring safe and stable long-term operation.