Siemens SIPROTEC 5 7SJ86 Overcurrent & Feeder Protection Relay

Main Function: Overcurrent and feeder protection ، Tripping: 3-pole ، Inputs & Outputs: ، 4 current and 4 voltage transformers ، 11–23 binary inputs, 9–25 binary outputs ، Hardware: Modular, expandable I/O structure ، Protection Functions: ، Overcurrent and emergency line protection ، Directional comparison for optimized tripping ، Ground fault detection (3I0>, V0>, harmonic, intermittent, admittance, pulse method) ، Arc protection, capacitor bank protection, thermal overload protection ، Over/undervoltage, frequency, and power protection ، QU (reactive power–undervoltage) protection ، Control & Automation: ، Graphical logic editor, synchrocheck, switchgear interlocking ، Circuit-breaker failure & reignition monitoring ، Communication: ، Ethernet RJ45 (IEC 61850, DIGSI 5, GOOSE) ، Up to 4 pluggable communication modules: IEC 60870-5-103/104, DNP3, Modbus TCP, PROFINET IO ، PRP/HSR redundancy, IEEE C37.94 optical fiber link ، Cybersecurity: NERC CIP compliant, role-based access ، Additional Features: ، Phasor Measurement Unit (PMU), IEEE 1588 time sync ، Fault recording (up to 80 s @ 8 kHz or 320 s @ 2 kHz) ، Conformal coating