Main Function: Overcurrent and motor protection (backup protection for transformer differential relays)
Protection Functions:
Overcurrent (50/51/50N/51N)
Directional ground fault (67N/67Ns)
Motor protection: thermal overload (49), locked rotor (14), restart inhibit (66/86), load jam (51M)
Voltage & frequency protection (27/59, 81O/U)
Breaker failure (50BF), unbalance load (46), undercurrent (37)
Hardware:
4 current transformer inputs
0/3 voltage transformer inputs
3–7 binary inputs, 5–8 binary outputs
0–5 RTD inputs, 1 life contact
USB front port, removable terminals
Optional conformal coating
Communication:
IEC 61850 Ed. 1 & 2, IEC 60870-5-103, DNP 3.0, PROFIBUS-DP, MODBUS RTU
Ethernet redundancy (RSTP, PRP, HSR)
Millisecond-accurate SNTP time sync
Monitoring:
Voltage, current, frequency, breaker wear, trip supervision, fuse failure
Motor statistics and energy metering
8 oscillographic fault records
Applications:
Feeder, motor, and transformer backup protection
Industrial and utility substations
