A Family of Inventors and Entrepreneurs

	Edmund O. Schweitzer Edmund O. Schweitzer began designing and manufacturing innovative products for the electric power industry in 1909, when he partnered with Nicholas J. Conrad to develop the first reliable high-voltage fuse. This development resulted in Schweitzer & Conrad, known today as S&C Electric Company (www.sandc.com), a supplier of high-voltage electrical equipment. Later product developments included fuse mountings, disconnect switches, lightning arresters, and metal-enclosed switchgear. Mr. Schweitzer also spent much of his career at Commonwealth Edison Company in the Chicago area.
	Edmund O. Schweitzer Jr. In 1949, after presenting ideas and prototypes to ComEd, Edmund O. Schweitzer Jr. founded E. O. Schweitzer Manufacturing Company, Inc. for the purpose of researching and designing line-powered fault indicators. During his lifetime, Mr. Schweitzer amassed nearly 100 patents involving fault indicators, voltage sensors, current transformers, and other devices for the electric power industry. Utilities around the world rely on these fault indicators to quickly restore system power after a fault occurs. In addition, EOS Manufacturing’s current transformers provide load information to automated switchgear, including transformers manufactured by S&C Electric Company.
	Edmund O. Schweitzer III Edmund O. Schweitzer III founded Schweitzer Engineering Laboratories, Inc. (SEL) in 1982 for the purpose of making electric power safer, more reliable, and more economical. Dr. Schweitzer invented algorithms that he then used to develop microprocessor-based protective relays. Today, utilities in more than 110 countries around the world use SEL’s protective relays, recloser controls, motor protection relays, communications processors, and meters. With more than 50 SEL Technical Service Centers around the world, SEL commits to providing the best customer service and sales support in the industry.