PEAK Transformers


A New Era in Transformer Design Standards that Optimizes Overload Capacity and Reliability in a Smaller Footprint.

Cooper Power Systems introduces PEAK™ transformer technology for reliable electric power voltage transformation with overload capacity to at least 112% in smaller, lighter units than comparable fluid-filled transformers.

Utilizing an advanced high-temperature insulation system approach — comprised of thermally upgraded kraft paper, Envirotemp™ FR3™ dielectric fluid, and an optimized core and coil design — a 75 °C Average Winding Rise (AWR) PEAK transformer results in a smaller footprint and a lighter unit capable of the same ratings as a physically larger 65 °C AWR rated unit.

  • Increased Overload Capacity: Utilities are now able to operate PEAK transformers beyond full rated load, to at least 109% for single-phase units and 112% for three-phase units, to more precisely size transformers based on the period of peak demand—without reducing insulation life.
  • Increased Reliability: Moisture and thermal stress are the enemy of transformer reliability and life. Longer life contributes to system reliability performance. The capacity to load PEAK transformers continuously at higher temperature and varying loads without causing damage to the transformer contributes to better overall system reliability.
  • Smaller, Lighter Transformers: When compared to traditional transformer operation at the same kVA rating, a 75 °C AWR PEAK Transformer will typically be smaller and lighter. These units will use less material and fewer gallons of dielectric fluid resulting in a better value, as well as lowering related costs of handling and operating the larger transformers.

Envirotemp™ and FR3™ are licensed trademarks of Cargill, Incorporated.