Schweitzer Engineering Laboratories (SEL)

Schweitzer Engineering Laboratories (SEL) designs and manufactures advanced power system protection and automation solutions that enhance the safety, reliability, and cost-effectiveness of electric grids worldwide. With a portfolio that spans digital protective relays, substation technologies, distribution automation, cybersecurity, and microgrid controls, SEL serves utilities and industrial customers in 173 countries. The company differentiates itself through four decades of innovation, a 10‑year warranty, and free technical support for the life of its products, ensuring long‑term performance and customer confidence. SEL’s commitment to modernizing the grid—through precise timing, synchrophasors, and software‑defined networking—helps power communities and critical infrastructure more sustainably and resiliently. Its culture of engineering excellence and global partnership positions SEL as a trusted leader in the power industry.