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ABB REU615 HBUAEAADANB6ANN1XG

ABB REU615 HBUAEAADANB6ANN1XG is a digital voltage protection and control relay from the Relion® 615 series, designed for medium-voltage power distribution and utility substations. It is mainly used for voltage, frequency monitoring and feeder/busbar control to keep the grid stable and reliable.

Main Functions

The relay integrates protection, control, measurement and communication in one device.

Protection functions

• Overvoltage / Undervoltage protection
• Loss of voltage detection
• Overfrequency / Underfrequency protection
• Loss of frequency protection
• Voltage unbalance detection

Measurement functions

• Voltage monitoring
• Frequency measurement
• Power factor measurement

These features make it ideal for distribution feeders, busbars, capacitor banks and industrial power systems.

Control & Automation Features

According to ABB Relion 615 documentation, REU615 also provides advanced control capabilities:

• Circuit breaker control via front HMI or remote SCADA
• Control of disconnectors and earthing switches
• Position indication for primary equipment
• Binary input/output support for multiple devices

This allows the relay to work as both a protection device and a bay controller.

Communication & Integration

The relay supports modern substation automation standards:

• IEC 61850 (substation communication standard)
• Modbus and other industrial protocols

This enables seamless integration into SCADA, DCS and smart grid systems.

Typical Applications

REU615 is widely used in:

• Utility substations
• Industrial power distribution systems
• Renewable energy plants
• Power management and load shedding schemes

Its goal is to prevent voltage instability and maintain power quality.

Summary

ABB REU615 HBUAEAADANB6ANN1XG is a compact, multifunction voltage protection relay that combines:

• Protection
• Measurement
• Control
• Communication

in one device, making it a reliable solution for modern medium-voltage networks.