ABB REU615

I. Overview

• Configuration A: Applied to voltage and frequency protection schemes, including bus voltage supervision, load shedding and restoration, overfrequency and underfrequency protection, etc. This configuration is particularly suitable for power grids with distributed generation.
• Configuration B: Used for automatic voltage regulation of transformers with on-load tap changers, including three-phase non-directional overcurrent protection, overvoltage, undervoltage protection, and transformer thermal overload protection.

II. Parameters

• Rated voltage: 100–240 VAC (Configuration A) or 380–525 V (Configuration B)
• Rated frequency: 50/60 Hz ± 5 Hz
• Input current: 1/5 A
• Communication interfaces: Supports IEC 61850, GOOSE, IEC 60870-5-103, Modbus®, and DNP3, etc.
• Protection class: IP40
• Operating temperature: -20°C to +60°C
• Dimensions: 150mm × 80mm × 120mm (Configuration A) or 100mm × 150mm × 120mm (Configuration B)
• Weight: 15kg (Configuration A) or 10kg (Configuration B)

III. Product Features

• High reliability: Adopts digital protection technology to ensure stable operation under complex conditions.
• Flexible configuration: Supports two standard configurations (A and B), allowing users to select and adjust according to specific needs.
• Rich protection functions: Includes overvoltage, undervoltage, overfrequency, underfrequency, three-phase non-directional overcurrent, zero-sequence overvoltage, phase unbalance, thermal overload, etc.
• Advanced measurement functions: Supports measurement of phase voltage, zero-sequence voltage, frequency, power factor, etc.
• Powerful communication functions: Supports the IEC 61850 standard to ensure interoperability between devices.
• User-friendly interface: Equipped with a large LCD display, supporting local and remote access for easy operation and monitoring.
• Self-diagnosis function: Built-in self-check system to monitor hardware and software status in real time, preventing misoperation.

IV. Structure and Composition

• Housing: Made of high-strength plastic material with good protection performance.
• Input/output interfaces: Including phase voltage input, zero-sequence voltage input, frequency input, binary input/output, etc.
• Communication module: Supports multiple communication protocols, such as IEC 61850, GOOSE, IEC 60870-5-103, Modbus®, and DNP3, etc.
• Control unit: Responsible for processing protection, measurement, and control logic to ensure normal operation of the device.
• Human-machine interface (HMI): Provides graphical display, supporting customized single-line diagrams (SLD) and remote access.

V. Application Fields

• Power systems: Including substations, power plants, transmission lines, etc.
• Industrial distribution: Suitable for power distribution systems in industrial enterprises to ensure stable voltage and frequency.
• Renewable energy: Used for voltage and frequency protection and regulation in renewable energy systems such as wind power and solar power.
• Industrial processes: Used for equipment protection and control in industries such as manufacturing, chemical, and food processing.

VI. Installation and Maintenance

• Installation: REU615 can be quickly installed via a plug-in design, suitable for various power distribution and control cabinets. Pay attention to the connection of input/output interfaces and the configuration of the communication module during installation.
• Commissioning: Use ABB’s PCM600 tool for configuration and commissioning, supporting the creation of multi-layer logic functions.
• Maintenance: Regularly inspect the operating status of the device to ensure the cleanliness and tightness of input/output interfaces. Use ABB’s diagnostic tools for fault troubleshooting and maintenance.