The magnetic cores of Uptegraff Power Transformers are made of high-permeability, grain oriented steel.
All cores utilize step-lapped laminations for minimum loss, sound level, and exciting current.
The Uptegraff Company pioneered the use of aluminum conductor in transformer windings, with eminently successful results. All Uptegraff dry-type transformers contain sheet insulation consisting largely of Aramid fibers which have a class H thermal rating. This material is supplemented with polyester-type resin impregnation. All Uptegraff liquid immersed transformers are shipped with dry nitrogen in the gas space above the liquid. As an option for corrosive environments, the tank can be provided using stainless steel or copper bearing steel plate.