Technical Parameters Parameter Category Specification Product Series / Platform ABB Relion® 615 Series Device Type Numerical Feeder Protection and Control Relay (IED) Key Standards IEC 60255, IEC 61850 (Ed. 2), IEC 60870-5-103 Rated Auxiliary Supply (Us) 24-48 V DC, 48-250 V DC, 110-240 V DC/AC (Multiple versions available, e.g., -A, -D, -G suffixes). Analog Inputs • Current (CT) Inputs 5 current inputs: 3 phase (IL1, IL2, IL3), 1 neutral/earth (IN), 1 sensitive earth fault (optional, via core-balance CT). Configurable for 1 A or 5 A secondary. • Voltage (VT) Inputs 4 voltage inputs: 3 phase-to-earth voltages (UL1, UL2, UL3) + 1 residual voltage (U0) or an additional busbar voltage for synchrocheck. Typical ratings: 100/110 V or 100/√3 V. Core Protection Functions Comprehensive suite including: • Three-phase non-directional/directional overcurrent (50/51, 67) • Earth-fault protection (50N/51N, 67N) – sensitive & residual • Two-step negative-sequence overcurrent (46) for unbalance • Two-step thermal overload (49) for cables/transformers • Two-step over/under voltage (27/59) • Two-step over/under frequency (81) • Auto-reclosing (79) for overhead lines • Circuit breaker failure protection (50BF) Control & Interlocking • Bay control for up to 5 objects (e.g., CB, 2 disconnectors, 2 earthing switches). • Programmable logic with CFC (Continuous Function Chart) editor in PCM600. • Synchronism check (25) and live/dead line monitoring. Measurement & Metering High-accuracy measurement (Class 0.5) of: • Currents, Voltages (fundamental & true RMS) • Power (P, Q, S), Power Factor, Frequency • Energy (Import/Export, kWh, kVARh) • Harmonics (up to 15th) Human-Machine Interface (HMI) • Large graphical LCD with backlight. • Navigation keys and function keys. • LED indicators for status, alarms, and trips. • Front USB port for configuration and data extraction. Data Recording • Event recorder (≥ 1000 time-stamped events). • Disturbance recorder (fault recorder/oscillography) with analog channels and binary signals. Communication Interfaces • Rear communication slots: Supports plug-in modules for: - IEC 61850-8-1 (GOOSE, MMS) over Ethernet (copper/fiber) - IEC 60870-5-103/104, Modbus RTU/TCP, DNP3 • Front port: Ethernet (RJ45) for engineering access. Time Synchronization Supports SNTP, IRIG-B, and PTP (IEEE 1588). Operating Temperature -40°C to +70°C (Extended range) Mounting Panel-mounted (DIN rail or direct mounting). Compact dimensions. Configuration Software ABB PCM600 – Universal protection and control IED engineering tool. Typical Applications • Overhead line and cable feeder protection in distribution substations. • Transformer protection (for small-mid size transformers). • Capacitor bank protection and control. • Industrial plant feeder protection.