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.
SEL transmission line protection relays provide subcycle line current differential and multizone distance protection, and their application is scalable for your needs.
SEL devices protect valuable transformers in power transmission systems.
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 protection and controls increase power efficiency and reliability by improving the system’s power factor and voltage stability.
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 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.
SEL software helps you optimize the configuration of your device and visualize power system events.
Pre-engineered or custom panels and enclosures help keep costs low and increase system reliability when used for retrofit upgrades and new equipment installations.