Fault Locating

The built-in fault-locating methods in SEL relays allow you to quickly identify faults, dispatch crews for repairs, and restore service faster.

Traveling-Wave-Based Fault-Locating Relays

These relays use the wave propagation time to calculate fault locations that are accurate to one tower span.

Ultra-High-Speed Line Relay

Time-Domain Line Protection

Advanced Line Differential Protection, Automation, and Control System

These relays use voltage and current measurements as well as line impedance values to calculate fault locations.

Advanced Line Differential Protection, Automation, and Control System

Protection, Automation, and Control System

Transmission Protection System

Phase and Ground Distance Relay

Phase and Ground Distance Relay

Line Current Differential Protection and Automation System