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Medium-voltage transformers

Envirotran single-phase overhead transformer

Eaton’s Cooper Power series single-phase Envirotran overhead transformer offers an environmentally responsible, cost-effective, highly efficient and safer choice in overhead 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. Envirotran transformers are manufactured in 5-167 kVA models.

Voltage class
5-167 kVA
Primary voltage
2400-34,500 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, NEMA and DOE Energy Efficiency
  • Constructed with EPRI-recommended interlaced core-type design for greater resistance to low-side voltage surges
  • Quality System ISO-9001 certified
  • Available in single- or double-bushing covermount configuration, with secondary voltages of 120/240, 240/480 or 277
  • Thermoset polyester low voltage bushings provide more temperature resistance than standard polymer
  • Tin-plated high- and low-voltage bushing terminals accommodate aluminum or copper conductors
  • Cores and coils designed for high reliability and low field failure rates: Available in grain-oriented electrical or amorphous steel

The safer, environmentally friendly choice

Utilizing FR3 high-fire-point dielectric fluid, these 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.

Optimum field performance

Eaton’s transformer cores and coils are designed and manufactured to provide the most reliable performance and the industry’s lowest failure rate. Advanced quality management, combined with exhaustive testing, assures unparalleled reliability and operation.
Specifications

Ratings

  • Envirotran 50 or 60 Hz (5-167 kVA)
    • Primary voltage: 2400-34,500 V
    • Secondary voltage: 120-600 V
    • Standard with FR3 dielectric fluid

Specifications

  • Meets or exceeds ANSI, NEMA and DOE2016 standards
    • IEEE, C57.12.00, C57.12.20, C57.12.31, 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 C57.12.31-2010 standard
  • Cover with a minimum dielectric strength of 8 kV
  • FR3 fluid
  • Cores and coils designed for high reliability and low field failure rates: Available in grain-oriented electrical or amorphous steel
  • Heavy-duty lifting lugs and hanger brackets per ANSI requirements up to 4500 lbs
  • 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:
    •  5, 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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