Core type power transformers up to 400MVA 345kV Shortest lead time in the industry Shell type power transformers up to 1400MVA 500kV The most reliable transformers made right here in the USA



With over 15,000 custom designs we offer customers the flexibility they need in their power transformers. The variety of control boxes we offer are only one area where this is evident. From sizes to NEMA ratings, from components to paint if we have not designed a control box to your needs we have the experience and knowledge to find out a solution for you.


NEMA 3, 3R, 3S, 4, 4X, 7 and 8, Carbon steel or stainless steel, Bottom gland plate.

Standard or optional items in the control box

A variety of terminal blocks and wire sizes

Shorting blocks for CTs

CBA (Current Balancing Autotransformer) for SWTG

IED – Qualitrol 509/505


Intelligent Electronic Device

VCM3 (Virginia Transformer Control Module)

VCM3 (Virginia Transformer Control Module)



LTC controllers



Fan control

Bottom gland plate construction

Seal in relays – SPR (sudden pressure rise relay)

GFI receptacles and lights

Anti-condense heaters with thermostat

Ground connection


CT and PT test switches

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