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Substation transformer

Eaton’s Cooper Power series substation transformers are built with unprecedented quality and attention to detail, meeting a vast range of customer specifications and applications. Designed for both new installations and retrofit solutions, these substation transformers  are optimized to perform in the most rigorous sectors of industry and are designed to last. Transformers can be filled with Envirotemp FR3 fluid, offering fire safety and extended life or with conventional mineral oil for common applications.

Substation transformer
Base rating
300-12,000 kVA
Secondary voltage
208-15,000 V (25 kV available upon special request)
Primary voltage
2400-46,000 V, Delta or Wye

Core features

  • Available with cover-mounted or sidewall-mounted bushings for connections to primary and/or secondary switchgear
  • Constructed with a wide range of core steels and winding conductors to optimize efficiency versus cost
  • Flexible core/coil and tank construction enable dimensional requirements to be met
  • Transformers filled with Envirotemp FR3 fluid may be used in indoor applications and provide unique fire safety and environmental advantages, including extension of insulation life
  • All units meet applicable ANSI, IEEE and NEMA standards, as well as NEC, DOE and CSA specifications

Combining flexibility with the highest quality manufacturing

Designed to meet exact customer specifications, Eaton’s Cooper Power series substation transformers fulfill a variety of commercial, industrial and utility needs for both indoor and outdoor applications.

The safer, environmentally friendly choice

When biodegradable Envirotemp FR3 high-fire-point dielectric fluid is utilized, transformers provide enhanced fire safety and environmental benefits and increase equipment longevity.

Global recognition

Eaton's Cooper Power series substation transformers can be certified in full by third party nationally recognized testing laboratories including FM and UL/cUL and can be built for Class 1 Division 2 locations.

Save space and reduce equipment coordination

Close-couple medium-voltage liquid-filled transformers with low and medium-voltage assemblies in a streamlined unit substation design.