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Medium-voltage transformers

Envirotran single-phase pad-mounted transformer

Eaton’s Cooper Power series single-phase Envirotran pad-mounted transformer offers an environmentally responsible, cost-effective, highly efficient and safer choice in pad-mounted transformers. Utilizing FR3 high-fire-point dielectric fluid, these transformers provide fire safety benefits, coupled with a projected lifespan well beyond that of a traditional mineral-oil transformer. 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.

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Single-phase pad-mounted distribution transformers catalog Fundamentals of medium-voltage transformers
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The smart choice

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

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Voltage class
MaxiShrub & Shrubline: 10-167 kVA; Ranch Runner: 10-50 kVA
PRIMARY VOLTAGE
MaxiShrub: 2400-34,500 V; Shrubline: 2400-19,920 V; Ranch Runner: 2400-14,400 V
SECONDARY VOLTAGE
120-600 V

Core features

  • Readily biodegradable and non-toxic FR3 fluid provides sustainable performance at a low cost
  • Fluid conforms to ASTM D6871-03 and to pending IEEE PC57.147
  • 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

The safer, environmentally friendly choice

Utilizing FR3 high-fire-point dielectric fluid, these single-phase pad-mounted transformers enhance fire safety while providing environmental benefits. Because the fluid is readily biodegradable and non-toxic, it provides sustainable performance at a competitive cost.

Perfect for industrial and residential applications

MaxiShrub (10-167 kVA), with an ANSI Type-1 frontplate is ideal for single-phase industrial 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. When specified, radial feed transformers can be connected line-to-line on three-wire systems.

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.
Specifications

Ratings

  • 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:
    • 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
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