Description

The REU615 from ABB is a compact voltage protection and control relay designed for utility and industrial power systems. It ensures reliable monitoring, fault isolation, and voltage regulation across medium-voltage networks.

Specifications

• Manufacturer: ABB

• Model: REU615

• Type: Voltage Protection and Control Relay

• Rated Voltage: 24–250 V DC/AC (auxiliary supply)

• Supported Protocols: IEC 61850, Modbus, DNP3, SPA

• Protection Functions: Overvoltage, undervoltage, residual voltage, frequency

• Control Capabilities: Breaker control, interlocking, auto-reclosing

• Measurement Accuracy: Class 1 per IEC standards

• Display: Graphical LCD with LED indicators

• Communication Ports: Ethernet, serial, optical

• Mounting Format: Flush or rack-mounted

• Operating Temperature: –40°C to +70°C

• Storage Temperature: –40°C to +85°C

• Enclosure Rating: IP54 (front), IP20 (rear)

• Weight: Approx. 4.5 kg

Features

• Multifunction Protection: Combines voltage, frequency, and residual protection in one unit

• Advanced Communication: Supports IEC 61850 for seamless substation integration

• Breaker Control: Enables direct operation and status monitoring of circuit breakers

• Flexible Mounting: Installs easily in flush or rack configurations

• Wide Voltage Range: Operates across broad auxiliary supply levels

• Environmental Resilience: Performs reliably in extreme temperature conditions

• User-Friendly Interface: LCD display with LEDs simplifies diagnostics and configuration

• System Compatibility: Integrates with ABB Relion series and substation automation systems