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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 which are indicated in the catalog. 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. All of our transformers have an electrostatic shield between the primary and secondary for transient noise reduction. Insulation system are 105 C, 180 C or 220 C depending upon the series of transformer.