Rex Power Magnetics - Product Page: 3 Phase Isolation Transformers

By: Rex Power Magnetics  09-12-2011
Keywords: transformer, enclosure, Powder Paint

Isolation Transformer defined: A transformer which isolates the primary circuit from the secondary circuit. Designed for indoor installation in hotels, schools, factories, industrial and commercial buildings where a reliable power source is required for lighting and other low voltage equipment and machinery.


  • Using Computer Aided Designs (CAD) our engineers have created a range of highly efficient transformers having long trouble-free life with reduced weight, size and cost.
  • Ventilated openings in the enclosure are coordinated with the cooling ducts in the coils to ensure proper natural circulation of air for long life and minimum losses.
  • General purpose indoor ventilated steel enclosure (Nema-1 or CSA-1) suitable for dry locations. After fabrication, the enclosure is finished in ASA61 grey powder paint suitable for most industrial and commercial installations.
  • Transformers up to 75KVA may be readily hung on H-columns, walls, shelves or floor mounted to suite each typical installation. Most units have lifting lugs, conduit knockouts and removable front and back covers for easy access to terminals.
  • Transformers 112.5 KVA and larger are supplied with brackets suitable for floor or platform mounting only.
  • Transformer terminations rated below 330A are supplied with suitable hardware and lugs for cable connection. Terminations above 330A are supplied with termination pads.
    • Class 220 Insulation
    • 150oC Temperature Rise
    • Primary Taps +/-2.5% & +/-5% (+/-5% only on 3KVA - 15KVA)
    • CSA certified, File No. LR34493
    • UL Listed, File No. E108255
    • ISO9001 Quality Certification
    • Available in Copper (Cu) or Aluminum (Al) windings


Some enclosure dimensions may have changed. Items with "Z" are Energy Efficient. (CSA 802.2-00/Nema-TP1-1996)


  • Temperature Rise (115oC, 80oC)
  • Other Primary or Secondary Voltages
  • Different Frequency (other than 60Hz)
  • Different Nema Rated Enclosure (2, 3R, 4, 4X, 12, etc)
  • Electrostatic Shield (single, double, triple or multiple/ultra)
  • Custom sizes (specific KVA ratings)
  • K-Factor Rated (K4, K9, K13, K20, K30)
  • Special Paint/Finish

* Information is subject to change without prior notice.

Keywords: Electrostatic Shield, enclosure, Isolation Transformer, Natural Circulation, Powder Paint, Quality Certification, transformer,

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