PEAK three-phase pad-mounted transformer

Medium-voltage transformers

Eaton's Cooper Power series PEAK three-phase pad-mounted transformer is filled with FR3 dielectric fluid and is uniquely designed to manage increased loads and temporary overload capacity without loss of life expectancy compared to mineral oil-filled alternatives. Offering the ability to operate beyond full rated load from 12% to 22%, the transformer’s smaller, lighter footprint further enhances value.

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Overview Technical Resources Support

Base rating

45-12,000 kVA

Available slash ratings

65/75 °C (12% kVA increase); 55/75 °C (22% kVA increase)

75 °C average winding rise

Lower cost, more compact design

Core features

Designed to improve performance in terms of kVA rating, compact dimensions, lighter weight, safety and sustainability
Offers increased temporary overload capacity without loss of life expectancy (with 55/75 or 65/75 °C slash rating)
Utilizing an advanced high-temperature insulation system approach and an optimized core and coil design, a 75 rise 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

Cargill's FR3 dielectric fluid provides superior transformer performance, safety and environmental friendliness.

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Better manage temporary overloads

Eaton's Cooper Power series PEAK three-phase pad-mounted transformers can be loaded beyond base-rated load up to 122% of base kVA, helping utilities to more precisely size transformers based on periods of peak demand — without impacting insulation life.

PEAK transformer product aid

Increased transformer reliability and lifespan

The capacity to load PEAK transformers continuously at higher temperature and varying loads without causing damage to the transformer enhances overall system reliability while providing a longer equipment lifespan (conforms to IEEE standard C57.154).

Cargill FR3 fluid information

Just as much power in smaller 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.

PEAK three-phase pad-mounted transformer catalog

Specifications

Ratings

Base kVA at 75 AWR	45 kVA to 12,000 kVA
kVA increase at 65/75 AWR	+12% (max rating up to 13,440 kVA)
kVA increase at 55/75 AWR	+22% (max rating up to 14,640 kVA)
Primary voltage	2400 V to 46,000 V
Secondary voltage	120 V to 14,400 V
Basic Impulse Level (BIL)	30 kV to 250 kV
Additional forced-air ratings	+15%, +25%, +33% to base kVA

Standards

ANSI/IEEE	C57.154, C57.12.00 and C57.12.34
CSA	C227.4
NEMA (sound level)	NEMA TR-1
Third-party approval/recognition	FM Global (Indoor & Outdoor), UL/cUL – available for most ratings

Enclosure

Layout	Compartmental type
Tamper resistance	Three-point latching and padlock system with recessed penta-head bolts
Enclosure integrity	Meets or exceeds ANSI/IEEE C57.12.28 and C57.12.29 (if stainless constructioni)
Material	Mild or stainless steel (304L)
Enclosure environment	Outdoor
Insulating medium	Air

Key features

Distribution transformer	Three-phase pad-mounted
Install location	Outdoor
Power direction	Step-down and step-up

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Eaton is an intelligent power management company dedicated to improving the quality of life and protecting the environment for people everywhere. We are guided by our commitment to do business right, to operate sustainably and to help our customers manage power ─ today and well into the future. By capitalizing on the global growth trends of electrification and digitalization, we’re accelerating the planet’s transition to renewable energy and helping to solve the world’s most urgent power management challenges.