Plate Transformers

MSI Plate Transformer

Plate Transformers

Plate Transformers supply the high voltage required for the plate of a vacuum tube.  These plate transformers are typically used in microwave, induction heating along with TV and radio broadcast equipment using high powered vacuum tubes.


  • Power rating up to 3000 KVA
  • Hi-Pot testing up to 50 kV
  • Three phase design
  • Frequency 50 and 60 Hz
  • Tapped primary to fit a variety of incoming voltages
  • Tapped secondary for flexibility in output voltages
  • Conservative design margins and insulation stresses for reliable operation and long lifespan
  • Aluminum or copper windings



  • UL Recognized insulation system (Primary must be 600V or less). MSI UL Insulation systems are available in 130°, 180° and 220°C ratings
  • Private labeling with customer supplied nameplate artwork. Units that are private labeled cannot carry our UL label
  • NEMA 1 (indoor) or NEMA 3R (outdoor) enclosure with ANSI 61 gray powder coat finish
  • Temperature monitoring thermal switches, thermocouples, or platinum RTD’s
  • Final Test Reports with optional Certificate of Compliance



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