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General purpose encapsulated (potted) transformers

Eaton’s EP (single-phase) and EPT (three-phase) general purpose encapsulated dry-type transformers are of the two-winding type, encapsulated (potted) in a mix of epoxy coated sand and gravel, and are available in a wide variety of primary and secondary voltage combinations. General purpose encapsulated transformers are designed, manufactured and tested in accordance with all of the latest applicable ANSI, NEMA and IEEE standards, and are designed for continuous operation at rated kVA.
General purpose encapsulated (potted) transformers
Voltage class
0.050 37.5 kVA

3.0 – 75.0 kVA
Winding conductor
Aluminum or copper

Core features

  • Encapsulated transformers are specifically excluded from the scope of U.S. DOE energy efficiency requirements
  • Encapsulated transformers are available  in aluminum or copper windings
  • Standard 115°C temperature rise; 80°C optional. Insulation class 180°C
  • Optional low-sound 3dB and 5dB below NEMA ST-20 standard
  • Available in 60 and 50 Hz
  • Standard NEMA 3R enclosures
  • Cores are grounded with a copper lead

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