Technical Parameters Parameter Category Specification Product Series / Platform ABB Relion® 615 Series (REF615 Platform) Device Type Numerical Feeder Protection and Control Relay (IED) Hardware Variant Suffix -E - Typically indicates: • Wide-range auxiliary power supply. • Extended operating temperature range. • Possibly a specific default I/O or communication configuration. Key Standards IEC 60255, IEC 61850 (Ed. 2), IEC 60870-5-103 Rated Auxiliary Supply (Us) Typical for -E version: 48 - 250 V DC / 48 - 240 V AC, 50/60 Hz (Auto-ranging). This is a key benefit, allowing installation in systems with various control voltages. Analog Inputs • Current (CT) Inputs 5 current inputs: 3 phase (IL1, IL2, IL3), 1 neutral (IN), 1 sensitive earth fault (Io). Configurable for 1 A or 5 A secondary. • Voltage (VT) Inputs 4 voltage inputs: 3 phase (UL1, UL2, UL3) + 1 residual/auxiliary voltage (Uo). Standard ratings: 100/110 V or 100/√3 V. Core Protection Functions Full suite included (configurable via software): • Directional/Non-directional phase & earth overcurrent (50/51, 67) • Two-step negative sequence overcurrent (46) • Thermal overload (49) • Over/Under voltage (27/59) & frequency (81) • Auto-reclosing (79) • Breaker failure (50BF) • Sensitive directional earth fault (67N) Control & Automation • Control of up to 5 switching devices (CB, disconnectors). • Programmable logic (CFC in PCM600). • Synchrocheck (25). Measurement & Metering Class 0.5 for: I, V, P, Q, S, PF, f, Energy (kWh, kVARh), Harmonics. Human-Machine Interface (HMI) • Graphical LCD with backlight. • Keypad navigation. • LED indicators. • Front USB port. Data Recording • Event recorder (>1000 events). • Disturbance recorder (oscillography). Communication Interfaces Base unit typically includes: • 1 x RS485 port (for IEC 60870-5-103 or Modbus RTU). • 1 x Ethernet port (RJ45, front or rear). Optional plug-in modules for: IEC 61850, IEC 60870-5-104, additional Ethernet, Profibus, etc. Time Synchronization IRIG-B, SNTP, PTP (IEEE 1588) support. Operating Temperature Extended Range: -40°C to +70°C (A key feature of the -E variant). Mounting Panel-mounted (compact design). Configuration Software ABB PCM600. Typical Ordering Context A complete order code would be longer, e.g., REF615C-E A5D1A1B1B1B5C..., where the subsequent letters/numbers define: CT/VT ratings, binary I/O count, communication modules, etc.