Complete pilot protection for primary and backup three-pole tripping schemes on transmission and subtransmission lines.
Program up to four-shots of automatic breaker reclosing with synchronism and voltage checks to optimize system restoration.
Send synchrophasor data to SCADA and wide-area measurement systems using SEL Fast Messages at rates of up to 60 times per minute. Accuracy of ± 1 degree and microsecond timing of event reports improve system visualization and event analysis. Use SEL-5077 sycnroWAVe® Server Software to time-correlate synchrophasor data from SEL-311 Relays and send it to display and archiving systems, such as SEL-5078 sycnroWAVe Console Software
Use the built-in fault locator to efficiently dispatch line inspection and repair personnel.
Program breaker failure logic with SELogic® control equations.
Schedule as-needed circuit breaker maintenance and send alarms when the breaker monitor detects excess breaker contact wear from the number of operations and magnitude of interrupted current.
Alarm for low-voltage conditions on station battery.
Implement wire-alike upgrades for popular SEL-221 series distance relay applications.
Application settings simplify upgrades from SEL-221 relays.
Use SEL-5040 Power System Report Manager Software to automatically gather relay event reports on your PC and manage them with a database.
Use SEL-5010 Relay Assistant Software to manage your relay settings.
Use SEL-5601 Analytic Assistant Software to display oscillograms and vector diagrams to analyze event reports.