Dongan offers single phase ventilated transformers from .50kVA to 5kVA and encapsulated transformers from .250kVA through 25kVA. Our enclosures are NEMA 3R as standard with only some exceptions at the smallest kVA. These transformers can be wall mounted or floor mounted cabinet style depending upon the kVA rating. These are UL and CUL listed and are copper wound through 25kVA. We offer aluminum wound transformers starting at 7.5kVA through 100kVA as standard off the shelf. Larger custom transformers are available. Copper windings and copper lead wire terminations used throughout.

• Series 35 has a UL Class 105C insulation system with 55C temperature rise at a maximum ambient of 40C. This insures a long life and cool operating temperatures.
• Series 80 has a UL Class 180C insulation system with 115C temperature rise at a maximum ambient of 40C.
• NEMA Type 3R, wall mount enclosure suitable for indoor or outdoor use. May be used in banks of 2 or 3 units for standard three phase voltages and nonstandard, open delta autotransformer applications. (Note: .050 kVA - .100kVA are in a NEMA Type 1 enclosure)
• Multiple knockouts provide convenient conduit entry and exit locations through the front access wiring compartment.
• Ground studs provided for bonding compatibility with both metallic and nonmetallic conduit.