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... Pilot directional earth- fault protection (85)
NR Electric
... switch-onto- fault (SOTF) logic, broken conductor and dead-zone protection
Monitoring ...
NR Electric
... phase-to-ground distance protection (21L)
NR Electric
... section protection
NR Electric
... handles
protection calculations and
relay coordination; each BU acquires analog and binary signals and executes trip/close commands from the CU.
Protection and control features
- Low-impedance
NR Electric
... >Restricted Earth Fault Protection (64REF)
NR Electric
... phase-to-ground distance protection (21T)
NR Electric
... PCS-921 numerical relay provides comprehensive protection and control for circuit breakers, including breaker-failure protection, pole-discrepancy and dead-zone protection, phase/negative-sequence ...
NR Electric
... ground fault protection (64S1)
NR Electric
... 3rd harmonic stator ground fault protection (64S2)
NR Electric