SEL offers superior protection performance combined with integrated station automation for all your bus protection needs.
Provides bus current differential protection, circuit breaker failure protection, and backup overcurrent protection with independent check zones, advanced open CT detection, enhanced front-panel HMI, and 60- and 120-cycle event reports.
Apply the SEL-587Z Relay for single-zone bus protection, reactor protection, or sensitive restricted earth fault protection on grounded, wye-connected power transformer windings.