Transformers and Components

Transformers from Cooper Power Systems are available with Envirotemp™ FR3™ fluid or electrical grade mineral insulating oil. The highly refined fluids are tested and degassed to assure a chemically inert product with minimal acid ions. Special additives minimize oxygen absorption and inhibit oxidation. To ensure high dielectric strength, the fluid is re-tested for dryness and dielectric strength, refiltered, heated, dried, and stored under vacuum before being added to the completed transformer.

Our transformers’ cores and coils are designed to provide the best field performance. Precision machinery is used to cut the core to exacting measurements. Burr-free, silicon steel optimizes core loss efficiency. Coils are wound with the highest quality electrical grade epoxy coated, thermally upgraded kraft paper.

Computer controlled winding machines provide exacting tension control and conductor placement for superior short-circuit strength and maximum efficiency. Each coil is pressed and baked to fuse thermoset epoxy adhesives, for stronger coils with superior dielectric properties. Each core and coil assembly is clamped under pressure to further assure mechanical integrity. Excellent shortcircuit test results verify our design, production processes and equipment.