Dynapower developed our line of standard and custom transformers over 40 years ago when we first began manufacturing rectifiers. These technologies are designed and manufactured at our facility in South Burlington, Vermont. Our transformer products are custom designed to suit your overall system needs. With sales, design, manufacturing, and testing capabilities for these products in the same location, Dynapower fills a niche in the custom transformer market.

All of our transformers are wound using copper conductors, and core steel is cut in house. These transformers are designed, manufactured, and tested in accordance with ANSI and IEEE standards. Other standards can also be considered as required by individual customers.

dry apoxy cast custom transformers

Dry Epoxy Cast

Epoxy cast coil transformers are manufactured at our facility, which casts the windings into a solid mass of epoxy under vacuum using steel molds. This technology offers unparalleled mechanical strength by sealing the coils in an impervious casting of dielectric epoxy resulting in the most reliable and longest lasting transformer technology available. Although this line was originally developed to augment our other dry type transformers in larger rectifier applications, these have also been sold extensively as stand-alone products for distribution and specialty applications.

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liquid filled custom transformers

Liquid Filled

Our liquid immersed product line was developed for larger and higher voltage applications where the benefits of dielectric oil allowed our rectifier systems to grow both in kVA and voltage class. These transformers are designed in specialty tanks for integration with our rectifier systems.

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dry vmi custom transformers


Our open wound dry type transformers are most commonly applied as main components to our rectifier systems. These transformers are encapsulated using a vacuum pressure impregnation process with polyester varnish and can be cooled either by air or water.

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Contact Us

We’re always interested in new projects, large or small. Please don’t hesitate to get in touch with us regarding your project.

To contact us, please call  (800) 292-6792 or submit a Request for Quote via our web form. 

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