Founded in Oklahoma City in 1946 by three brothers as an electric-motor repair shop, Southwest Electric Co. now designs and manufactures transformers and custom switchgear while providing nationwide electrical field services. After joining the SGB-SMIT Group in 2025, the company operates as SGB-SMIT USA, pairing 75 years of Southwest Electric experience with a global transformer manufacturing network. Its motor operations can repair equipment weighing up to 100 tons, a reflection of the heavy-duty work behind its service offering.
UL Certified
cUL Certified
IEEE C57.12.00
Compliance program
IEEE C57.12.90
Compliance program
IEEE C57.12.34
Compliance program
Department of Energy 10 CFR 431.193
Compliance program
IEC 60076
Compliance program
VDE 0532
Compliance program
EASA Association Member
SKF-Certified Rebuilder
UL
Quality certification
CUL
Quality certification
SGB-SMIT USASGB-SMIT USA manufactures large, medium, distribution, cast resin, and dry-type power transformers, as well as custom medium-voltage switchgear. It also provides transformer and switchgear field, repair, testing, maintenance, commissioning, refurbishment, and installation services for utilities, industrial facilities, data centers, oil and gas, substations, and wind power.LOUISVILLE, OH
SGB-SMIT GroupFounded in 1913, SGB-SMIT Group is a European transformer specialist manufacturing equipment for generating and distributing electricity. The group operates 15 sites across three continents and eight countries, with about 3,800 employees supporting projects from industrial power systems to renewable generation. Its transformer service teams also diagnose, maintain and repair both SGB-SMIT and other manufacturers’ transformers internationally.LOUISVILLE, OH
OTC Services, IncWith roots in Ohio Transformer’s 1946 founding, OTC Services remanufactures and repairs dry-type and liquid-filled transformers for industrial and utility customers, while also designing and building new units. Its Northern Ohio operation occupies a 100,000-square-foot facility with direct rail access and a 100-ton overhead crane, supporting work that ranges from shop repairs to field service. OTC became part of the SGB-SMIT Group in 2012, linking its transformer work to a group with more than a century of design and manufacturing history.LOUISVILLE, OH
CD ElectricFounded in 1971 as a two-person Corpus Christi rewind shop, CD Electric now repairs, rewinds, sells and services industrial electric motors across the Southwest. Its two locations and more than 25 employees support heavy-duty equipment with testing up to 6,000 horsepower and 4,160 volts, along with field service and installation. CD Electric also holds Siemens and ABB repair certifications and keeps more than $2 million in inventory for urgent replacements.SOUDERTON, PA