Line Protection
Bay Control and Substation Integration
SEL provides complete monitoring and control solutions for all of your mission-critical substation equipment, including double breakers, reclosing, breaker failure, and auxiliaries such as air break switches, grounding switches, and more.
Digital Secondary System (Digital Substation) Solutions
TIDL Technology: An SEL Innovation
Time-Domain Link (TiDL) technology is an innovative, protection-centered solution engineered with simplicity in mind. It uses a point-to-point architecture, secure direct fiber connections, and built-in time synchronization, making it easy to implement with no network engineering required.
Sampled Values Technology
SEL Sampled Values (SV) solutions combine protection in the merging units with the flexibility of IEC 61850-9-2 communications. It is a communications-centric, standard-compliant solution that uses a point-to-multipoint Ethernet-based network to transmit data.
Monitoring and Automation
Control and optimize every aspect of power system protection and operation to improve performance and resiliency.
Synchrowave Operations: The Next Step in Situational Awareness
Visualize and monitor your entire transmission system—so you never have to wonder what’s happening with mission-critical functions and equipment. SEL Synchrowave Operations software works seamlessly with all SEL transmission protection devices to turn the advanced data they collect into information you can use.
Engineering Services
Let us partner with you to create an SEL solution for your system. From engineering studies and system design through commissioning and training, SEL engineers bring inventiveness and a deep understanding of the fundamental principles of electric power systems to every project. No matter how complex or sophisticated the system, we can help you protect, simplify, and control it.Products and Service 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.