T&R Electric Supply Company buys, sells, rents, and repairs distribution and power class transformers, along with medium and high voltage switchgear. We are “The Transformer People.” Located on the plains of Colman, South Dakota, T&R focuses on inventory, quick delivery, competitive pricing, and personal commitment to quality and performance. We have been a dependable supplier of transformers and other high voltage electrical apparatus to municipalities, REAs, investor-owned utilities, and commercial and industrial customers.