REU 610 | ABB | Voltage Protection Relay

Product Description

The ABB REU610 voltage relay is a compact and reliable solution for monitoring, measuring, and protecting electrical systems. It integrates advanced supervision functions with disturbance recording and a clear operator interface, making it suitable for a wide range of industrial and utility applications.

Key Features

• Inputs

• Four energizing inputs for phase-to-phase voltage and residual voltage measurement

• Two standard digital inputs with three optional extensions

• Supports both phase-to-phase and phase-to-earth voltage monitoring

• Outputs

• Three power output contacts (PO1, PO2, PO3) with optional latch configuration

• Two standard signal outputs (SO1, SO2) plus three optional outputs (SO3–SO5)

• Eight switchgroups (SGR1–SGR8) for routing internal and external trip signals

• Configurable minimum pulse length of 40 ms or 80 ms

• Disturbance Recording

• Records instantaneous values and RMS curves

• Logs up to eight user-selectable digital signals

• Triggering available on rising or falling edges of digital inputs

• Front Panel & Interface

• Alphanumeric LCD display (2 × 16 characters) with backlight and automatic contrast control

• Three fixed LED indicators (green, yellow, red) and eight programmable red LEDs

• User-friendly navigation with arrow keys, clear/cancel, and enter buttons

• Optically isolated serial communication port with activity LED

• Two-level password protection for settings and communication security

Application Scenarios

• Voltage protection in medium-voltage substations

• Monitoring and supervision in industrial power distribution systems

• Integration into automation schemes requiring disturbance recording

FAQ

Q: Can the REU610 record both analog and digital signals?  A: Yes, it records RMS curves and instantaneous values along with up to eight digital signals.

Q: Is the relay suitable for phase-to-earth voltage measurement?  A: While primarily designed for phase-to-phase measurement, it also supports phase-to-earth voltage monitoring.

Q: How secure is the device against unauthorized access?  A: It features two levels of password protection for both settings and communication.