SEL invents, designs and builds digital products and systems that protect power grids around the world. This technology prevents blackouts and enables customers to improve power system reliability, safety and cost. SEL, a 100 percent employee-owned company that is headquartered in Pullman, Washington, has manufactured products in the United States since 1984 and now serves customers in 148 countries. SEL provides unmatched technical support, customer service and a 10-year worldwide warranty.