The #1 US-owned power transformer manufacturer in North America Core type transformers up to 500 MVA, 525kV Shortest lead time in the industry Shell type power transformers up to 1400MVA 500kV The most reliable transformers made right here in the USA


Coils need careful handling through the drying, pressing, and sizing operations. All coils are dried then oil-sprayed using a vapor-phase drying (VPD) process under isostatic pressure. Isostatic compression stabilizes the actual height during the drying process. Windings are kept compressed until nesting to avoid axial spring-back. To make sure this process is flawless, we use a home-grown, high-tech device we call a “winding mushroom.” The mushroom ensures that isostatic compression is uniform and continuous throughout the VPD process. This process is crucial in meeting the design parameters for the short circuit.

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