What is a cast coil transformer?

What is a cast coil transformer?

A cast coil transformer is a type of dry-type transformer with its primary and secondary windings completely encased in a solid block of epoxy resin, typically introduced under vacuum to ensure complete penetration and a void-free casting. This robust, protective design makes cast coil transformers highly durable, resistant to moisture, dust, chemicals, and vibration, making them ideal for harsh, severe, or outdoor environments where traditional dry-type transformers with exposed windings could be compromised.

 

 

Key Features & Benefits

Environmental Protection:

The solid epoxy casting offers superior protection against moisture, high humidity, airborne dust, corrosive elements, and other contaminants.

Mechanical Strength:

The hard resin casing provides excellent mechanical strength, resisting vibrations and physical stress.

Enhanced Safety:

The epoxy resin is a non-flammable material, increasing safety, especially in environments where fire risk is a concern.

High Reliability:

The void-free casting and robust construction lead to minimal partial discharges and a long service life with little maintenance required.

Environmental Friendliness:

Cast coil transformers eliminate the environmental risks associated with liquid-filled transformers, such as leaks or the need for spill containment.