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Power Transformer, Isolation

Espey Mfg. developed and manufactures this transformer for a ground mobile radar application.

Electrical Specifications

  • Rating: 30kVA AT 30°C
  • Input:
    Primary Winding: Delta Connection (H1, H2, H3)
    Frequency: 50/60HZ (± 5%)
    Impedance: 5.0% PU MAX AT 60HZ
    Efficiency: .95MIN AT RATED kVA, Load Power Factor of .80 Lagging
    Dielectric Withstand Voltage: 4000VRMS, 60HZ, 1 Minute
  • Output:
    Secondary Winding: Wye Connection
    Voltage: 208V/120V (+4/-4%) at Full Load 83A (30kVA), .85
    Dielectric Withstand Voltage: 2500VRMS, 60HZ, 1 Minute
  • Isulation System: 220°C
  • Audible Sound Level: 45dB Maximum at Rated Voltage and Frequency With No-Load
  • Altitude: Up to 15,000 feet
  • Temperature Rise: 130ºC

Mechanical Specifications

  • Unit Weight: 365 LBS
  • Enclosure: Ventilated, Carbon Steel, Painted per MIL-E-917
  • Cooling: Natural convection


  • 220°C Insulation System
  • Circuit Breaker Protected Outputs
  • Output Voltage Snubber on 208/120V (X1, X2, X3) Output
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