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Medium-voltage transformers

Conventional single-phase pad-mounted transformer

Eaton’s Cooper Power series single-phase conventional pad-mounted transformers are designed for exceptional performance. Available in ratings from 10-167 kVA, the transformers are available in MaxiShrub (ANSI-Type 1), Shrubline (ANSI-Type 2) and Ranch Runner designs to meet various applications. Conventional transformers meet or exceed the requirements of applicable ANSI and NEMA standards. Single-phase pad-mounted transformers can be filled with standard electrical grade insulating mineral oil or fire-resistant FR3 fluid.

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Single-phase pad-mounted distribution transformers catalog Fundamentals of medium-voltage transformers
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Primary voltage
MaxiShrub: 2400-34,500 V; Shrubline: 2400-19,920 V; Ranch Runner: 2400-14,400 V
Secondary voltage
120-600 V
Voltage class
MaxiShrub and Shrubline: 10-167 kVA; Ranch Runner: 10-50 kVA

Core features

  • Available option of FR3 fluid for increased fire safety or electrical grade mineral oil
  • Meets or exceeds industry standards including ANSI (except Ranch Runner frontplate), NEMA and DOE Energy Efficiency
  • Cores and coils designed for high reliability and low field failure rates: Available in grain-oriented electrical or amorphous steel
  • Overcurrent protection includes a standard Bay-O-Net fuse and an optional current-limiting fuse or weak link
  • Tin-plated high- and low-voltage bushing terminals to accommodate aluminum or copper conductors
  • Configurable to Rural Utilities Service (RUS) specification

Conventional single-phase pad-mounted transformer designs

MaxiShrub transformer (ANSI Type 1)
MaxiShrub single-phase pad-mounted transformer
Eaton's Cooper Power series MaxiShrub transformer is an ANSI and IEEE Type-1 single-phase dead-front pad-mounted transformer. The ANSI and IEEE Type-1 frontplate arrangement allows vertical feed to the primary and secondary bushings. It is ideal for single-phase industrial and residential applications where a wide range of kVAs or heavy cabling is required.
Shrubline transformer (ANSI Type 2)
Shrubline single-phase pad-mounted transformer
Eaton's Cooper Power series Shrubline transformer is a Type-2 single-phase dead-front pad-mounted transformer. The low profile design blends visually with surroundings—shrubs, low hedges, and home air conditioners—making it ideal for residential applications.
Ranch Runner transformer
Ranch Runner single-phase pad-mounted transformer
Eaton's Cooper Power series Ranch Runner transformer is manufactured with ratings from 10-50 kVA. It is Rural Utilities Services (RUS) approved, and meets all ANSI and IEEE requirements except frontplate arrangements. The Ranch Runner transformer is a very compact pad-mounted transformer. Its compact design makes it ideal for irrigation, oil field and residential applications. It offers an economical design which provides standard transformer capabilities in a very compact space. This unit is shipped complete with its own polypad suitable for shipping and installation.

Perfect for commercial and residential applications

MaxiShrub (10-167 kVA), with an ANSI Type-1 frontplate is ideal for single-phase commercial and residential applications where a wide range of kVAs or heavy cabling is required. The transformer allows vertical feed to the primary and secondary bushings.

Low-profile Shrubline combines safety and aesthetics

Ideal for high-profile areas, Shrubline (10-167 kVA) with an ANSI Type-2 frontplate offers a low-profile design that blends with surrounding shrubs, hedges and home air conditioners, making it a popular choice for residential applications.

Powerful capabilities in less space

The compact design of the Ranch Runner pad-mounted transformer (10-50 kVA) provides standard capabilities in very little space. Ideal for irrigation, oil field or residential applications, Ranch Runner is Rural Utilities Services (RUS) approved and meets all ANSI and CSA/CEA requirements except frontplate arrangements.

The safer, environmentally friendly choice

Single-phase conventional transformers can be filled with our optional FR3 fluid, which provides increased fire safety and superior environmental characteristics where less-flammable fluid is desired. Because the fluid is readily biodegradable and non-toxic, FR3 provides sustainable performance at a low cost.
Specifications

Ratings

  • 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

  • Meets 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
  • Configurable to Rural Utilities Service (RUS) specification
  • FR3 fluid or electrical grade mineral oil
  • 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:
    • 55 °C, 55/65 °C, 65 °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)
  • Single-phase pad-mounted distribution transformers catalog
    This catalog provides ratings and ordering information for Eaton’s Cooper Power series single-phase pad-mounted distribution transformers which are available in standard ratings and configurations or can be customized to meet specific needs and are available as Shrubline, MaxiShrub and Ranch Runner transformers.
    (PDF 2 MB , 04/01/2018)
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