Multi-tap Transformer


Eaton’s Cooper Power Systems utilizes the same manufacturing experience, craftsmanship, and robust designs found in our conventional three-phase transformers to offer Multi-tap transformers for electrical submersible pump (ESP) applications. Our multi-tap transformers step-up the low voltage output from a Variable Speed Drive (VSD) to power your pumps. With 25 different voltage settings in both delta and wye connections, our transformers can meet a wide variety of applications. Multi-tap transformers are available with both mineral oil and Envirotemp™ FR3™ fluid and can be specified as UL® Listed & Labeled.

kVA 100-1000
Low Voltage* 480
High Voltage* 750/1500 Delta and 1299/2685 Wye up to 1400/2800 Delta and 2425/4850 Wye

*Custom voltages available upon request


  • Electrical grade mineral insulating oil or Envirotemp™ FR3™ fluid
  • (2) De-energized tap changers, externally operable
  • Sidewall-mounted high-voltage porcelain bushings
  • Sidewall-mounted low-voltage molded bushings with NEMA spades
  • Tank bases designed for skidding or rolling in any direction
  • Extra-heavy, welded-in-place lifting lugs (4)
  • Stainless steel grounding pads (3)
  • Cooling fins 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
  • Painted using ANSI #61 Light Gray; or Special paint available per request
  • Laser-scribed anodized aluminum nameplates
  • UL® Listed & Labeled (optional)
  • Short-circuit compliant
  • Seismic rated

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