An encapsulated dry-type transformer is a totally enclosed, compound filled transformer. The core and coil assembly is embedded in a polyester resin compound, which provides solid insulation. The embedding compound has an extremely high heat transfer rate, which permits a design of minimum size and weight. The compound-filled assembly is completely encased in a sturdy steel housing and cannot be damaged by dust, moisture, or adverse atmospheric conditions.
Federal Pacific UL & CUL Listed encapsulated dry-type transformers can be used in industrial, commercial, institutional, and residential installations for economical, efficient distribution of power. Encapsulated units are ideal for dusty industrial areas and are suitable for Indoor and Outdoor applications. Typical loads served include tanning beds, motors, lighting, heating, ranges, air conditioners, exhaust fans, control circuits, appliances, and portable tools.
Federal Pacific encapsulated transformers are designed based on a 25°C ambient, 115°C rise, 180°C insulation system. Due to low enclosure temperature rise, no UL-506 special markings are needed to indicate clearance between the enclosure and adjacent surfaces. Sound level problems are negligible with encapsulated transformers because the core and coils are rigidly encased in the polyester resin, which is mechanically strong and acts as sound deadening material.