Siemens Siprotec 4 SIPROTEC 7SJ61 Overcurrent Protection Relay

Protection Functions: ، Overcurrent protection (definite-time, inverse-time, or user-defined) ، Sensitive and intermittent earth-fault detection ، High-impedance restricted earth fault ، Inrush current detection ، Motor protection (undercurrent, start supervision, restart inhibit, locked rotor, load jam) ، Overload and temperature protection ، Breaker failure protection ، Negative-sequence protection ، Auto-reclosure and lockout ، Control/Logic: ، Control of circuit breakers and isolators ، Switch positions shown on graphic display ، Control via keyboard, binary inputs, DIGSI 4, or SCADA ، Custom logic via CFC programming ، Monitoring Functions: ، Operational measurements and breaker wear monitoring ، Trip circuit supervision ، Oscillographic fault recording (8 records) ، Motor statistics and runtime metering ، Communication Interfaces: ، IEC 60870-5-103, IEC 61850, PROFIBUS-FMS/-DP, DNP 3.0, MODBUS RTU ، Service and front interfaces for DIGSI 4 ، Time sync via IRIG-B / DCF77 ، Hardware: ، 4 current transformer inputs ، 3/8/11 binary inputs ، 4/8/6 output relays