High-accuracy energy metering for a wide range of applications.
Identify power system anomalies & mitigate their impact.
Fully predesigned and preconfigured for common protection and control applications. Ready to ship within 5 days.
Flexible and simple to configure with a selection of predesigned modules. Ready to ship within 4 weeks.
Specially designed, manufactured, and tested to meet your exact specifications. Ready to ship in 12 to 16 weeks.
Protect feeder lines and substations with the world’s most reliable relays.
Isolate outages, clear temporary faults, and integrate DERs.
Secure networking for fault location and automation.
Automate protection and network reconfiguration to improve reliability.
Optimize power factor and deliver consistent voltage.
Upgrade to the industry’s most reliable and advanced protection.
Monitor and control your mission-critical substation equipment.
Visualize, monitor, and control your entire transmission system.
Protection and control for hydropower generation at any scale.
Comprehensive generator protection and plant integration.
Protect reciprocating generators and large combined-cycle systems.
Synchronize, protect, and control networked wind generation.
Control power factor, protect feeders, and connect to the utility grid.
Protection and control of station service.
Power management and control solutions that keep critical processes online.
Quality, integrity, community—our values are behind everything we do.
How our company culture brings our mission and values to life.
We take care of our products so that our products can take care of you.
From volunteer events to donations to internships, our values drive us to be an asset to our communities.
Since 1984, SEL has grown from 1 employee to over 5,000 worldwide.
2350 NE Hopkins Court
Pullman, WA 99163 - USAPhone: +1.509.332.1890Fax: +1.509.332.7990
Design the future of power alongside a global team of industry experts.
Build the products that protect our critical power systems.
From accounting to marketing, it takes a team to keep SEL running.
Get started on a career at SEL while you finish your degree.
Explore different specializations within the power industry and discover your passion.
Read how a New Mexico utility is modernizing their grid to pioneer the future.
Learn how a New Jersey university is protecting its grid from natural disasters.
Read how SEL helped end decades of blackouts in the country of Georgia.
Get the latest SEL white papers, technical papers, product bulletins, and more.
Keep up with happenings at SEL, and explore our community connections.
See what people and publications around the world are saying about SEL.
Defense in depth for today’s cyber threats
PNM creates a comprehensive line protection scheme by pairing the SEL-T401L and two SEL-411L relays.
Ultra-High-Speed Line Relay
Customer service and technical support teams are located in regional offices around the world, ready to help you get the answers and solutions you need.
Get help with your technical needs.