Schweitzer Engineering Laboratories (SEL), based in Pullman, Washington, United States, is a leading provider of protection, automation, and control solutions for power systems worldwide. The company was founded in 1982 by Dr. Edmund O.

Schweitzer III, an influential pioneer in digital relay technology. Headquartered in Pullman, SEL has grown from a small startup to a global company with operations in over 150 countries. The company's headquarters in Pullman spans over 360,000 square feet and serves as a hub for research, development, manufacturing, and support.

SEL's main products and services revolve around advanced technologies for power system protection and control. The company offers a wide range of solutions including protective relays, substation automation systems, distributed energy resource controls, advanced metering systems, and communication devices. Their solutions are known for their reliability, versatility, and advanced automation capabilities.

On a global scale, SEL operates through a network of offices, sales representatives, and partners. The company has subsidiaries in Canada, Australia, Brazil, China, Mexico, South Africa, and the United Arab Emirates, among others. SEL also has joint ventures with strategic partners in various countries, further expanding its reach and capabilities.

In terms of market position, SEL is recognized as a leader in the field of power system protection and control. Its products are widely used in utilities, industrial facilities, and renewable energy installations. The company boasts a strong reputation for its technical expertise, customer support, and commitment to innovation.

Over the years, SEL has achieved several milestones, including the development of the world's first digital protective relay. The company has also been recognized with numerous awards for its products and services. SEL has continually expanded its product lineup to address the evolving needs of the power industry, focusing on digitalization, cybersecurity, and grid modernization.

As of the latest information available, SEL continues to innovate and grow its global presence. The company remains dedicated to providing cutting-edge solutions for power system protection and control, while enhancing the resilience and efficiency of the modern power grid