Siemens Siprotec 4 SIPROTEC 7SJ62 Protection Relay

Overcurrent and directional overcurrent protection (definite/inverse/user-defined) ، Sensitive and directional earth-fault detection ، Displacement voltage and intermittent earth-fault protection ، High-impedance restricted earth fault ، Motor protection and overload protection ، Temperature and inrush monitoring ، Under-/overvoltage and frequency protection ، Rate-of-frequency-change and power protection (reverse, factor) ، Reactive power protection under undervoltage ، Breaker failure and negative-sequence protection ، Phase-sequence monitoring, synchro-check, auto-reclosure, fault locator, lockout ، Control/Logic: ، Control of circuit breaker and isolators ، Display of switching positions on graphic display ، Operation via keyboard, binary inputs, DIGSI 4, or SCADA ، User-defined automation via CFC ، Monitoring Functions: ، Measurement of voltage, current, and frequency ، Energy metering (active/reactive power) ، Breaker wear and trip circuit supervision ، Fuse failure monitoring ، Oscillographic fault recording (8 records) ، Motor statistics ، Communication Interfaces: ، IEC 60870-5-103 / IEC 61850 ، PROFIBUS-FMS/-DP ، DNP 3.0 / MODBUS RTU ، DIGSI 4 front/service interface (modem) ، Time sync: IRIG-B / DCF77 ، Hardware: ، 4 current transformer inputs ، 3/4 voltage transformer inputs ، 8/11 binary inputs ، 8/6 output relays