Overview of Schweitzer Engineering Laboratories (SEL)
Schweitzer Engineering Laboratories (SEL) designs and manufactures digital products and engineering services that protect, control, monitor, and automate electric power systems worldwide. Its portfolio includes protective relays, distribution controls, metering, fault indicators and sensors, automation controllers such as the Real-Time Automation Controller (RTAC), communications and precise-timing equipment, arc-flash solutions, microgrid controls, software-defined networking, substation technologies, and industrial computers. SEL embeds cybersecurity across its products and offers security services spanning system assessment, baselining, cyber-defense development, and ongoing management. For more than 40 years it has served utilities, industrial facilities, data centers, and marine and government operations across the globe.
- Global HQ: United States
- Phone: +1.509.332.1890
- Website: http://www.selinc.com
- Best for: Making Electric Power Safer, More Reliable, and More Economical
- Services: Engineering Services, Protective Relays, Automation Controllers, Communications, Cybersecurity
- Capabilities: Engineering Services, Protective Relays, Automation Controllers, Communications, Cybersecurity, Microgrid Controls, OT SDN, Substation Technologies
Profile updated 26 Jun 2026 Report incorrect data