Waukesha, Wis.—PEAK transformers from Cooper Power Systems are designed to manage increased loads and temporary overload capacity with a four time greater life expectancy when compared to mineral oil-filled transformer alternatives. Utilities are able to operate PEAK transformers beyond full rated load to at least 112 percent to more precisely size transformers based on unpredictable periods of peak demand.
Using an advanced high-temperature insulation system comprised of thermally upgraded kraft paper, an optimized core and coil design, and Envirotemp FR3 dielectric fluid, a 75-degree Average Winding Rise (AWR) PEAK transformer results in a smaller footprint and lighter unit capable of the same ratings as a physically larger 65 AWR rated unit. PEAK transformers are filled with the biodegradable alternative to transformer oil, Envirotemp FR3 dielectric fluid, a critical enabling technology that extends transformer life and raises fire ignition resistance. In addition, this soybean oil-based fluid creates a barrier against water at the surface of the insulation, making the thermal kraft paper in the coil windings stronger and longer lasting. All of these attributes combine for a lower total cost of ownership verses comparable fluid-filled transformers.
“New technology has always driven changes in transformer design standards. In 1956, Cooper Power Systems was the first to design and sell the 65 AWR transformer. It wasn’t until 1964 that 65 AWR became the standard,” said Mark Thurman, president, Cooper Power Systems, a division of Cooper Industries plc (NYSE: CBE). “Today, our PEAK transformer is the next step in that evolution, and is driving the adoption of new standards. The proposed IEEE Std C57.154-2012, covering the design, testing, and applications of transformers operating at elevated temperatures such as the PEAK transformer, is in its final approval process. It is expected to be released in the autumn of 2012.”
The capacity to overload PEAK transformers contributes to system reliability during peak periods, as they can be continuously operated at higher temperature and higher load without reducing the life of the transformer. In addition, when compared to traditional transformer operation at the same kVA rating, the PEAK transformer will be smaller and lighter. These units will use less material and fewer gallons of dielectric fluid resulting in a better value as well as lower related costs of handling and operating the larger transformers.
PEAK transformers are available in 75 AWR (Average Winding Rise), 55/75 AWR, and 65/75 AWR in both 5-167 kVA single-phase pole-mount transformers and 5-167 kVA single phase pad-mount transformers in either ANSI 1 or ANSI 2 configurations.
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