T & R Electric Supply Company Inc. Has Been Serving the Industry Since 1961. Specializing in rewinding and reconditioning power and distribution transformers, T&R continues to make customer satisfaction its top priority. T&R Electric is the industry leader in the transformer rebuilding business with the nation’s largest inventory of transformers. • New and rebuilt units from 3 KVA to 30 MVA • Distribution and power • Dry type transformers • Voltage regulators • Complete substation structures and components • Re-closers and circuit breakers • Overhead and underground switchgear