Envirotran Hardened Data Center (HDC)Transformer


Liquid-filled transformers from Cooper Power Systems have efficiently and reliably served more than 750MW of critical data center capacity for more than 4,000,000 hours without an hour of downtime. On the heels of this record, Cooper Power Systems continues to raise the bar in transformer design, providing ultimate reliability. The company’s Envirotran HDC (Hardened Data Center) transformer is designed with special attention to surge protection, providing superior performance under the most stressful electrical environments. The transformer surpasses dry-type transformers in every performance category; reliability, fire safety, loadability, operational life, efficiency, thermal loading, and installed footprint.

kVA 500 - 10,000
Primary Voltage Delta or Wye Connected 2400-43,800 V Delta 2400 V
1000 kVA and Below, Secondary Voltage 208Y/120 V to 14,400 V


  • Envirotemp™ FR3™ fluid or electrical grade mineral insulating oil (upon special request)
  • De-energized tap changer, externally operable
  • Sidewall-mounted high-voltage porcelain bushings
  • Sidewall-mounted low-voltage molded epoxy bushings with NEMA spades
  • Tank bases designed for skidding or rolling in any direction
  • Extra-heavy, welded-in-place lifting lugs and jack pads (4)
  • Stainless steel grounding pads (4)
  • Cooling radiators are welded directly to the tank
  • Dial-type thermometer
  • Dial-type liquid level gauge
  • Pressure vacuum gauge
  • Cover mounted automatic pressure relief device
  • Pressure test connection
  • 1” upper fill plug with filter press connection
  • 1” drain valve with sampler combination (2500 kVA and below)
  • 2” drain valve with sampler (over 2500 kVA)
  • 1” upper filter valve (over 2500 kVA)
  • Painted using ANSI #61 Light Gray; ANSI #70 Sky Gray; or Special paint available per request
  • Laser-scribed anodized aluminum nameplate

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