Envirotran Solar Transformer


Eaton, a key innovator and supplier in this expanding market, is proud to offer Cooper Power series Envirotran™ transformers specifically designed for Solar Photovoltaic medium-voltage applications. Eaton is working with top solar photovoltaic developers, integrators and inverter manufacturers to evolve the industry and change the way we distribute power.

Transformer Size Range 45 to 10000 kVA
Primary Voltage 15 kV, 25 kV, or 35 kV


  • Fluid conforms to ASTM D6871-03 and to pending IEEE® PC57.147, “Guide for Acceptance and Maintenance of Natural Ester Fluids in Transformers”.
  • Tank coating exceeds ANSI® C57.12.28
  • Full compliance with ANSI® C57.12.28 enclosure integrity requirements
  • Interior decal, "Filled with Envirotemp™ FR3™ fluid, ulti­mate biodegradability" teardrop shape
  • Bolted cover for tank access (45-1000kVA)
  • Welded cover with bolted hand­hole (1500-10000 kVA)
  • Three-point latching door for security
  • Laser-scribed anodized alumi­num nameplate
  • Liquid level gauge
  • Pressure vacuum gauge
  • Dial type thermometer
  • One-inch drain valve with sam­pling device in low-voltage com­partment
  • One-inch upper fill plug
  • Automatic pressure relief device
  • 20" Deep cabinet (45-2500 kVA)
  • 30" Deep cabinet (34.5/19.92 kV)
  • Removable sill for easy installa­tion
  • Steel divider between high-volt­age and low-voltage compart­ments
  • (15, 25 kV) 200 A (HTN) bushing wells
  • Lifting lugs (4)
  • Stainless steel ground pads (45-500 kVA)
  • Stainless steel NEMA 2-hole ground pads (750-7500 kVA)
  • Stainless steel cabinet hinges & mounting studs

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Envirotemp™ and FR3™ are licensed trademarks of Cargill, Incorporated.