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Power Transformer

Espey continues to be a primary supplier of distribution transformers for Naval applications. This 30kVA unit is one of a family of transformers including units between 3kVA and 75kVA power throughput. All the transformers in the family were certified through the ABS-NVR standards, specifically Part 3 Chapter 3 Section 4.

Electrical Specifications

  • Input Voltage: 450VAC, 60 Hz
  • Output Voltage: 208/120VAC, 60 Hz
  • Duty Cycle: Continuous
  • Dielectric Strength: 4000VAC, 60Hz Winding to Core and Case
  • Regulation: at 0.8 PF- 3.5%; at 1.0 PF- 3%
  • Exiting Current: 5% Max
  • Peak Inrush Current: 653 Amps Max

Mechanical Specifications

  • Mechanical Specs Mounting: Deck, with Removable Eyebolts for lifting
  • Weight: 340 lbs (at max)
  • Insulation Class: R (220ºC), w/ 50ºC Ambient, and Over-Temp Indicator Lamp
  • Temperature Rise: 140ºC
  • Connections: Primary- Marathon Terminal Block P/N 604 GP 04; Secondary- Marathon Terminal Block P/N 1423122


  • 30kVA Power Distribution Rated, Fan Assisted Convection Cooling
  • Drip-proof (IP22) and Impact Shock Rated Enclosure per MILS-901D
  • Available in Delta-Delta or DeltaWye Configurations


  • MIL-STD-1399/300A, Type I
  • MIL-S-901D, Grade A, Class I, Type A, Unrestricted Orientation
  • MIL-E-15090, Type II, Class 2
  • IEEE C57.12.01-1998
  • IEC 60529, IP22
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