Our History

1908
The Beginning

Delta Star was originally founded in Chicago as the Delta-Star Electric Company manufacturing electrical devices in the generation, transmission, and distribution sectors. Early products included a line of high-voltage indoor and outdoor switches including disconnects, transfers, interrupters and disrupters for single and group operation.

1935
Advances in Technology

The company’s fame for improvement and development of substations spread to the federal government when in 1935 Delta-Star Electric was contracted by the government to produce what was considered at that time, the largest disconnecting switches ever built. In the same year, the Hoover Dam contractors solicited Delta-Star Electric’s help to manufacture a disconnecting switch able to handle 286,000 volts. These were the largest air-break switches ever made, weighing 15 tons each. The company made continued technological advances between the years of 1913 and 1950, patenting over 87 inventions.

1950
Product Expansion

Delta-Star Electric Company is purchased by H. K. Porter Company and subsequently renamed the Delta-Star Electric Division of H. K. Porter Company. Between 1950 and 1963, locations were added in Belmont, California and Lynchburg, Virginia.

1976
Delta Star Deploys First Mobile

Delta Star successfully deploys its first mobile power transformer to Withlacoochee River Electric Cooperative, Inc. Since this time, the company has manufactured and deployed more than 400 mobile substations and mobile power transformers nationwide, including into Canada. Our engineers have designed over 75% of the mobiles used by investor-owned utilities, electric cooperatives and municipals in the North American market.

2008
Celebrating 100 Years

Delta Star, Inc. celebrates 100 years in the electrical industry and is described as a world-class manufacturer of medium-sized transformers and a wonderful force in the community.

2010
Field Service

As part of Delta Star’s ongoing initiative to provide excellent customer service, Delta Star expanded its capabilities and introduced Field Service as a standalone division. Delta Star Field Service offers full-service packages which include installation, processing, and standard maintenance focusing on preventive maintenance that minimizes future unscheduled maintenance and optimizes the life of the transformer

2015
Acquisitions and Further Growth

On August 1, 2015, Delta Star acquired a transformer factory located in Saint-Jean-sur-Richelieu near Montreal, Quebec. The plant, formerly owned by Alstom, provided Delta Star’s customers with a third location to build power transformers. This transaction increased not only Delta Star’s market presence, but also its transformer capability.