Profile: Marathon Electric Co. specializes in the repair and re-design of electrical transformers, transformer regulators, transformer bushings and related transformer services. We rewind and re-design all oil filled single phase, three phase, distribution, and power transformers through 12/16/20 MVA 69 kV. We rewind, re-design, re-condition, upgrade, and convert dry type transformers from aluminum to copper. We also sell new and re-conditioned dry type transformers.