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
  • Aluminum or copper windings
  • Conservative design margins and insulation stresses for reliable operation and long lifespan



  • UL Recognized insulation system (Primary voltage must be less than 600V) – 130, 180, and 220°C systems are available
  • Private labeling with customer supplied nameplate artwork – Units that are private labeled cannot carry our UL label
  • Enclosure NEMA 1 or NEMA 3R
  • Thermal switches
  • Test Reports with optional Certificate of Compliance