Technical Specifications / Parameters Parameter Specification Manufacturer Model REF615K Product Family / Series ABB Relion® 615 Series (Feeder Protection) Device Type Numerical Feeder Protection and Control Relay Housing Compact "K" Case (Depth-reduced design for space-constrained panels). Key Protection Functions • Overcurrent Protection (50/51, 50N/51N) with multiple independent stages • Directional Overcurrent Protection (67/67N) • Earth-fault Protection (Sensitive and directional) • Phase Reversal (46) • Thermal Overload (49) for motor/cable protection • Breaker Failure Protection (50BF) • Under/Overvoltage (27/59) & Under/Overfrequency (81) • Auto-reclosing (79) Control & Monitoring • Programmable Logic (PLC-like) via CAP (Configuration and Planning) tools • Sequence of Events (SOE) Recorder • Disturbance Recorder (Fault recorder) • Measurement of V, I, P, Q, PF, Hz, etc. • Circuit Breaker Monitoring (wear, trip count) Communication Protocols • IEC 61850 (Edition 2) for station-level communication (MMS, GOOSE) • IEC 60870-5-103 & IEC 60870-5-104 • Modbus RTU & TCP/IP • DNP3 (Serial & TCP) Hardware I/O (Typical) • Binary Inputs: 9 (24-250V DC) • Binary Outputs (Relay): 8 (form-A contacts) • Analog Inputs: 4 current (1A/5A), 4 voltage (100-120V) • Ethernet Ports: 2 or 4 (RJ45, for IEC 61850/Modbus TCP) • Serial Ports: 2 (RS485/RS232) Human-Machine Interface (HMI) • Large, high-resolution graphical LCD display • Multilingual text support • Front-face navigation keys and LED indicators Power Supply Wide-range 24-48/60V DC or 110-240V AC/DC. Standards & Certifications IEC 60255, IEC 61850, IEEE C37.90, UL 508, CE, DNV-GL, ATEX (for specific variants). Mounting Panel or DIN Rail Mounting (optional bracket).