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Medium-voltage transformers

PEAK single-phase pad-mounted transformer

Eaton’s Cooper Power series single-phase pad-mounted PEAK transformers provide the capability to manage increased loads and temporary overload conditions without accelerating loss of insulation system life compared to mineral oil-filled alternatives. The transformer's overload capacity enables utilities to operate beyond full rated load to at least 109%, while their smaller, lighter footprint further enhances value. Available in ratings from 10-167 kVA, the transformers are available in MaxiShrub, Shrubline and Ranch Runner designs to meet various applications.

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PEAK single-phase pad-mounted distribution transformers catalog Fundamentals of medium-voltage transformers
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Voltage Class
MaxiShrub & Shrubline: 10-167 kVA; Ranch Runner: 10-50 kVA
AWR Slash Ratings
55/75 °C and 65/75 °C
Average Winding Rise (AWR)
75˚ C

The smart choice

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

Learn more

Core features

  • PEAK transformers are a class of transformer technology designed to improve performance in terms of kVA rating, compact dimensions, lighter weight, safety and sustainability.
  • Utilizes an advanced high-temperature insulation system comprised of thermally upgraded kraft paper, FR3 dielectric fluid and an optimized core and coil design
  • Superior moisture and thermal stress managing capabilities allow for extended insulation system life and enhanced reliability
  • Available in 10-167 kVA single-phase pad-mount designs; 75 °C AWR and 65/75 °C AWR options
  • 75 °C Average Winding Rise (AWR) of PEAK transformer offers same ratings as a physically larger and heavier 65 °C AWR rated unit
  • A 65/75 °C slash rated PEAK transformer is comparable in size to a conventional transformer but has nameplated overload capability
  • Meets or exceeds industry standards including ANSI, NEMA and DOE Energy Efficiency (except Ranch Runner frontplate)
  • Available in conventional or CSP designs for various overcurrent protection options
  • Available in MaxiShrub with an ANSI Type-1 frontplate, Shrubline with an ANSI Type-2 frontplate for a lower profile for improved aesthetics, or Ranch Runner with a Rural Utilities Services (RUS) approved frontplate for a more compact, economical design
  • Cores and coils designed for high reliability and low field failure rates: Available in grain-oriented electrical or amorphous steel

Better manage temporary overload capacity

PEAK single-phase pad-mounted transformers can be loaded continuously 9% beyond full rated base load, helping utilities to more precisely size transformers based on periods of peak demand without accelerated reduction of insulation life.

Gain additional load capacity

Designed to accommodate heavier base loading for longer periods without accelerating loss of insulation system life, PEAK pad-mounted transformers can be loaded continuously 9% beyond full rated base load.

Improve reliability

With superior moisture and thermal stress managing capabilities, PEAK pad-mounted transformers extend insulation system life, improving overall system reliability by reducing outages and transformer failures.
Specifications

Ratings

  • Overload capacity: At least 109%
  • Standard with FR3 dielectric fluid
  • MaxiShrub 50 or 60 Hz (10-167 kVA)
    • Primary voltage: 2400-34,500 V
    • Secondary voltage: 120-600 V
    • ANSI Type-1 frontplate
  • Shrubline 50 or 60 Hz (10-167 kVA)
    • Primary voltage: 2400-19,920 V
    • Secondary voltage: 120-600 V
    • ANSI Type-2 frontplate
  • Ranch Runner 50 or 60 Hz (10-50 kVA)
    • Primary voltage: 2400-14,400 V
    • Secondary voltage: 120-600 V
    • Rural Utilities Services (RUS) approved frontplate

Specifications

  • Meet or exceeds ANSI, NEMA and DOE2016 standards
    • IEEE standards C57.12.00, C57.12.38, C57.12.28, C57.12.35, C57.12.90, C57. 91 and C57.154
    • NEMA standards, NEMA TR 1 (R2000)
    • Department of Energy Efficiency Standard, 10 CFR Part 431
  • Tank coating exceeds IEEE Std C57.12.28-2005 and C57.12.29-2005 standards (stainless steel units only)
  • Full compliance with IEEE Std C57.12.28-2005 standard enclosure integrity requirements
  • FR3 fluid
  • Cores and coils designed for high reliability and low field failure rates: Available in grain-oriented electrical or amorphous steel
  • The transformer shall be designed in accordance with this specification and shall have an Average Winding Rise (AWR) of one of the following:
    • 65 °C, 65/75 °C, 75 °C
    • The applicable AWR rating shall be specified on the inquiry
  • The transformer shall be designed in accordance with this specification and shall have one of the following kVA ratings:
    • 10, 15, 25, 37.5, 50, 75, 100, 167
    • The applicable kVA rating shall be specified on the inquiry
  • Quality System ISO 9001 certified
Download Links
  • Commercial and industrial medium-voltage electrical distribution products brochure
    This brochure outlines Eaton’s Cooper Power series broad commercial and industrial medium-voltage transformer, switchgear, fuse, sectionalizer, switch, regulator, tool, OEM equipment, cable accessory, lightning arrester, power capacitor and recloser offerings.
    (PDF 2 MB , 01/24/2023)
  • Storm season rapid response information
    Eaton’s Cooper Power series product team works together with the engineering services team to provide a full storm response procedure to quickly ramp up operations in anticipation of storm impact for fast product shipment and remediation of damaged apparatus during storm recovery.
    (PDF 619 KB , 07/25/2019)
  • PEAK single-phase pad-mounted distribution transformers catalog
    This catalog provides ratings and ordering information for Eaton’s Cooper Power series PEAK transformers which are a class of transformer technologies that are designed to improve performance in terms of kVA rating, compact dimensions, lighter weight, safety and sustainability and are currently available with ratings up to 75 °C AWR.
    (PDF 206 KB , 08/01/2015)
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