Siemens SIPROTEC 5 7SJ82 Overcurrent & Feeder Protection Relay

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