l Unrestraint current differential protection. (87UT)
l Percentage restraint current differential protection. (87PT)
l Zero sequence current differential protection / Restricted earth fault protection (87ST, REF)
l Overcurrent protection for HV side and LV side. (50P or 51P)
l 2nd harmonic or even harmonics blocking function.
l Circuit breaker monitoring.
l CT failure detection logic.
l Operating circuit supervision.
l Current drift auto adjustment.
l Self diagnostic test.
l GPS clock synchronization.
l Fault Recorder.
l 64 tripping reports and 256 SOE (Sequence of Events) records.
l High resolution oscillography of last 8 oscillograms
(Compatible with international COMTRADE format)
l Rear communication ports: Ethernet with IEC 61850, 2 RS-485 with IEC 60870-5-103, 1 RS-485 for clock synchronization, 1 RS-485/232 for communication to printer.