Schweitzer Engineering Laboratories

Schweitzer Engineering Laboratories (SEL) is a global leader in the design and manufacturing of innovative solutions for the protection, automation, and control of electric power systems. Founded in 1982 by Dr. Edmund O. Schweitzer III, the company employs over 6,000 employees and operates in more than 100 countries.

At the core of SEL's offerings are products and services that enhance the safety, reliability, and efficiency of electrical grids worldwide. The company provides a diverse portfolio including protective relays, communication devices, human-machine interfaces, and engineering software.

These solutions are used across various industries such as electric utilities, renewable energy, oil and gas, and transportation to safeguard equipment, prevent power outages, and optimize power system performance.

Company Milestones

A notable achievement for SEL was the invention of the first microprocessor-based digital protective relay, the SEL-21, in 1982. This innovation transformed the electric power industry by offering reliable transmission line protection with fault locating at a much lower cost than traditional electromechanical relays.

This invention established SEL's commitment to continual improvement and delivering customer-centric solutions.

Ownership and Culture

SEL is a 100% employee-owned company, fostering a culture of ownership that drives growth, stability, and a strong focus on customer satisfaction.

This unique structure ensures that employees are deeply invested in the company's success, promoting long-term dedication to quality and innovation.

Locations and Facilities

SEL's global presence includes multiple manufacturing facilities and regional offices. In the United States, manufacturing centers are located in:

• Pullman, Washington
• Moscow, Idaho
• Lewiston, Idaho
• Lake Zurich, Illinois
• West Lafayette, Indiana

Regional panel assembly factories operate in:

• Charlotte, North Carolina
• San Luis Potosí, Mexico
• Bogotá, Colombia
• Campinas, Brazil

Additionally, SEL maintains a facility in Fairbanks, AK, USA to support localized customer needs.

Summary

Schweitzer Engineering Laboratories stands at the forefront of the electric power industry. The company delivers innovative products and services that enhance the safety, reliability, and efficiency of power systems worldwide.

With a strong foundation in employee ownership and a dedication to continuous innovation, SEL continues to shape the future of electric power.