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 must be 600V or less). MSI UL Insulation systems are available in 130°, 180° and 220°C ratings
  • 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
  • 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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