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Advanced Manufacturing Capability


Our three-phase custom transformer designs are used in a multitude of applications and include unique stacking configurations, custom mounting, brackets & terminals and integral lifting hardware. Materials are uniquely selected to optimize performance and reduce cost. Designs can incorporate inductance into the primary winding to save both cost and space.


Example Types of 3 Phase and Multi Phase Transformers:


  • 6-Pulse Rectifier
  • Zig-Zag
  • 18-Pulse Rectifier
  • 3-Phase
  • 12-Pulse Rectifier
  • Delta-Wye
  • Step-Up
  • Wye-Delta
  • Step-Down
  • Wye-Wye
  • Water-cooled
  • High-Leakage Rectifier
  • High Reactance




Recent Work

3 Phase Delta-Wye Transformer with Integrated Inductor


3 Phase Delta-Wye Transformer with Integrated Inductor

25.5KVA, 60Hz with 14.5mH: EI2.4" lamination, 12 Pulse Full Wave Rectified, Electrostatic Shield





3 Phase Power Transformer with Integrated Inductor


3 Phase Power Transformer with Integrated Inductor

9.0KVA, 400Hz with 100uH: Tape Wound E-Cores, Open Style, Electrostatic Shield; used in APU Power System.





3 Phase Battery Charge Rectifier Transformer


3 Phase Battery Charge Rectifier Transformer

35KVA, 60Hz: Open Style, Electrostatic Shield, M6 Grain Oriented Shunts, 6 Slot Chassis Mount


Reliable, Innovative Designs.

Each unit is assembled in-house with care and precision and delivered on time and within budget.



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3 Phase and Multi Phase Transformer Capabilities at Electronic Craftsmen


  • Power: From mW to 50kVA @ 60Hz or up to 200kVA @ 20kHz (typical)

  • Working Voltage up to 12kV (depending on frequency); multiple stages possible for higher outputs

  • Frequency: 25Hz to 500kHz (typical)

  • Temperature Class to 220C (155C / Class F typical)

  • Weight: 0.06 oz / 1g to 550 lbs / 250kg

  • Multiple taps as required

  • Dielectric Strength (hipot) to 30kVac or 20kVdc

  • Parts can be vacuum varnished or molded with a variety of hard or soft encapsulant materials with thermal conductivity.

  • Wire sizes from 1-45 AWG or Copper Foil to 0.050in thick (in multiple layers for higher current); Litz wire for higher frequency

  • Regulation to specification


  • Manufactured using all known state-of-the-art magnetic core materials, including but not limited to electrical grade steel laminations, ferrites & powdered iron, nickel-iron alloy, iron amorphous metal strip-wound cores, nanocrystalline cores and small toroids.

  • Antifungal and non-nutrient coatings available

  • Corrosion resistant coatings & platings available

  • Standard or custom terminations & leads

  • Mounting Configurations: pcb-mount (horizontal or vertical), custom or standard brackets or stacked configurations

  • Designed to meet CSA & UL (safety) or MIL PRF 27 (aerospace / military) requirements upon request

  • MIL PRF 27 Grade 5 & 6 encapsulation available