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Medium Voltage Power Transformer – Navy Shipboard (21kVA)

Espey Mfg. designs and manufactures medium voltage dry-type power transformers up to 2.5MVA air-cooled, and 5MVA water-cooled. Espey transformers are used in military, heavy industrial and high reliability applications.

Electrical Specifications

  • Input: Rated Voltage: 440 VAC, 60Hz, 3 PHASE (per MIL-STD-1399/300A) Rated Frequency: 60Hz
  • Output: (21kVA NOMINAL) Secondary: 3050, 3100, 3150, 3200, 3250, 3300V Selectable off-circuit

Mechanical Specifications

  • Weight: 830 lbs
  • Construction: per MIL-T-15108
  • Insulation Class: U, (200°C)

Features

  • 21kVA, natural convection cooled.
  • 450V, single (1) phase, 60Hz
  • 3.15kV (+3/-2 x 50V) Output
  • 2% Voltage regulation
  • Fully Self Protected – (Over-Voltage, Over-Current, Over-Temperature)
  • 45° drip-proof enclosure

Qualifications

  • MIL-S-901D Shock (Grade A)
  • MIL-STD-167 Vibration (Shipboard)
  • MIL-STD-740-1 and MIL-STD-740-2 (Airborne and Structure Borne Noise)
  • IEEE C57.12.91-1998 Short Circuit Withstand

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