Cast Coil Transformers

Epoxycast® is AFP Transformers, LLC, registered trademark for cast coil transformers. The cast coil process was developed in 1968 and continued development has led to their current product line of single-phase and three-phase cast coil transformers.

Epoxycast® cast coil transformers are not conventional dry-type transformers. A conventional dry-type transformer is impregnated, most often in a VPI (Vacuum Pressure Impregnated) system with a varnish or epoxy resin. In a cast coil transformer, one or more of the transformer's windings are cast with an epoxy material in a mold under vacuum. This casting is then cured for several hours according to a precise temperature cycle. The resulting coils have windings deeply embedded in tough, solid epoxy sealing out moisture and other contaminants. Additionally, the epoxy holds the windings firmly in place under short-circuit forces that would normally destroy a conventional dry-type transformer. The cast coil transformer will typically have a much higher BIL rating than a dry-type transformer thus making the cast coil transformer less susceptible to damage from high voltage transients.

Cast coil transformers have a wide variety of applications for single and three phase power distribution systems. Some of the most common applications are: Control Power Transformers (CPTs) in metal-clad switchgear; Neutral Grounding Transformers in electric utility networks and cubicles; Pad-Mount Distribution Transformers within industrial plants, high-rise buildings, hotels, schools, refineries, oil drilling platforms or airports; Power Transformers for mining equipment and Replacement of oil filled or other types of liquid cooled transformers.

AFP Transformers, LLC

206 Talmadge Rd.

Edison, NJ 08817-2824

Phone: 732-248-0305, 800-843-1215 (toll free)

Fax: 732-248-0542

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