What Is An Encapsulated Transformer?

What Is An Encapsulated Transformer?

An encapsulated transformer, also known as a potted or cast coil transformer, has its core and windings completely encased in a solid mixture of epoxy resin and sand or silica aggregate. This construction creates a moisture-proof, contaminant-sealed, and corrosion-resistant unit that is suitable for harsh environments where standard ventilated transformers would fail, such as marine, petrochemical, mining, and industrial sectors.

 

 

Key Characteristics

Sealed Construction:

The epoxy and aggregate mixture forms a solid, "brick-like" barrier around the internal components, preventing dust, moisture, and corrosive contaminants from reaching the core and coils.

Durability:

The encapsulation provides enhanced protection against environmental factors, improving the transformer's longevity and reliability.

Noise Reduction:

The solid encapsulation can help reduce noise and vibrations from the transformer.

Heat Dissipation:

The material used for encapsulation can improve heat dissipation from the core and windings, allowing for high performance even in high-temperature environments.

 

Applications

Encapsulated transformers are designed for challenging conditions and are commonly found in:

Marine environments

Petrochemical facilities

Mining operations

Industrial plants

Other applications requiring robust protection against dust, moisture, and contaminants