Transmission
Monitoring and Automation
Monitoring and Automation Products
Our complete monitoring and automation solutions include hardware, communications, synchrophasor measurements, data collection and archiving, and operations software to help you automate protection functions, monitor load flow, and improve system performance.
Complete Your Solution
SEL-411L Advanced Line Differential Protection, Automation, and Control System
Complete protection and control of any transmission line. The SEL-411L offers differential protection with both phase- and sequence-based operating elements plus backup distance protection. Deploy it with the SEL ICON, SEL-2240 Axion, or other communications platforms.
Learn moreSEL-421 Protection, Automation, and Control System
High-speed distance and directional protection and complete control of a two-breaker bay—plus advanced automation and monitoring capabilities.
Learn moreSEL Synchrowave Operations Software
SEL Synchrowave Operations software complements traditional SCADA systems and energy management systems by delivering power system insights that SCADA can’t provide.
With the fast-changing dynamics introduced by renewable energy integration, the system awareness provided by Synchrowave Operations is essential to ensuring that operators know what is really happening on the grid.
Synchrowave Operations works seamlessly with all SEL transmission protection devices to collect synchrophasor measurements and turn the data into information you can use. High-resolution time-series data, real-time analytics, and geographic information system (GIS) location information come together to improve system operators’ situational awareness.
Engineering Services
We can partner with you to create an SEL solution that puts you in control of your own system. From modeling and planning through commissioning and training, our engineers are among the electric power industry’s foremost experts—and they’re focused on what you need.
Products and Services You Can Rely On
SEL products are designed and manufactured for the world’s most challenging environments, exceeding all industry standards for temperature, shock, and electric stress. An optional conformal coating for circuit boards adds an extra level of protection against contaminants in extreme environments.
Every SEL product comes with a ten-year warranty—the best in the industry. If any product fails under warranty, we’ll repair or replace it for free.