SEL transmission protection solutions provide complete primary and backup protection from all types of faults. Using these devices helps you avoid expensive equipment damage and failure while maintaining system performance and increasing availability.
Line Protection
SEL transmission line protection relays provide subcycle line current differential and multizone distance protection, and their application is scalable for your needs.
Transformer Protection
SEL devices protect valuable transformers in power transmission systems.
Busbar Protection
Protect busbars and switchgear with high-speed differential fault detection, or expand your protection with features such as restricted earth fault, arc-flash, and overcurrent elements.
Capacitor Bank Protection
Capacitor protection and controls increase power efficiency and reliability by improving the system’s power factor and voltage stability.
Digital Secondary System Solutions
Time-Domain Link (TiDL) technology and SEL Sampled Values (SV) technology help protect and control substation primary equipment using digital devices in the secondary system that transmit data via fiber-optic cables.
Remote I/O
Remote I/O modules transfer data from remote locations over fiber and expand the I/O of SEL relays, automation controllers, and other devices without modification to the control panel face.
Configuration and Visualization Software
SEL software helps you optimize the configuration of your device and visualize power system events.
Panels and Enclosures
Pre-engineered or custom panels and enclosures help keep costs low and increase system reliability when used for retrofit upgrades and new equipment installations.
Installation Support
Complete your project with power supplies, switches, panel-mount hardware, cables, and other accessories.
