Drive Isolation Transformers

MSI Drive Isolation TransformerDrive Isolation Transformers

Drive Isolation transformers are used to isolate a motor drive from the main plant power.  These transformers are rated to handle the increased harmonics as a result of the operation of a variable speed drive.


  • Power rating up to 3000 KVA
  • Single or three phase design
  • Frequency 50, 60, and 400 Hz operation
  • Single or double electrostatic shields
  • Self-cooled, forced air cooled, or water-cooled construction
  • Aluminum or copper windings



  • UL Recognized insulation system (Primary voltage must be less than 600V) – 130, 180, and 220°C systems are available
  • CE marking with declaration of conformity ROHS and Low Voltage Directive where applicable
  • 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