Siemens SIPROTEC 5 7SJ85 Overcurrent & Feeder Protection Relay

Main Function: Feeder and overcurrent protection for all voltage levels ، Inputs & Outputs: ، 4 current transformers, 4 voltage transformers ، 11–59 binary inputs, 9–33 binary outputs ، Hardware: Modular design with expandable I/O; available with large, small, or no display ، Protection Functions: ، Directional/non-directional overcurrent protection ، Ground fault detection (3I0>, V0>, transient, harmonic, intermittent) ، Capacitor bank protection (overcurrent, overload, unbalance, differential) ، Over/undervoltage, frequency, power, and arc protection ، Fault locator, automatic reclosing (AREC), CB failure protection ، Control & Automation: ، Graphical logic editor (CFC), point-on-wave switching, interlocking, synchrocheck ، Control of circuit breakers and power transformers ، Communication: ، Fixed Ethernet (RJ45) for DIGSI 5 and IEC 61850 ، Up to 4 pluggable modules: IEC 61850-8-1, IEC 60870-5-103/104, DNP3, Modbus TCP, PROFINET IO ، PRP/HSR redundancy, IEEE C37.94 optical link ، Web access & cybersecurity (RBAC, signed firmware, event logging) ، Additional Features: ، Phasor Measurement Unit (PMU) ، IEEE 1588 time sync ، Fault recording (up to 80 s @ 8 kHz) ، Conformal coating standard