Overview

The ABB REU610 Voltage Relay is a high-performance device tailored for system voltage protection, measurement, and supervision across various power system applications. It features extensive functionality, including voltage measurement, protection capabilities, disturbance recording, and an intuitive user interface.

Inputs

• Energizing Inputs: Four inputs for phase-to-phase voltages and residual voltage.
• Digital Inputs: Two standard and three optional digital inputs controlled by external voltage.
• Voltage Measurement: Primarily for phase-to-phase voltage, but also accommodates phase-to-earth voltage.

Outputs

• Power Output Contacts: Three contacts (PO1, PO2, PO3).
• Signal Output Contacts: Two standard (SO1, SO2) and three optional (SO3, SO4, SO5).
• Switchgroups: Eight (SGR1...8) for routing internal and external trip signals.
• Minimum Pulse Length: Configurable to 40 or 80 ms.
• Latched Power Output Contacts: Configurable to be latched.

Disturbance Recorder

Records momentary values, RMS curves, and up to eight user-selectable digital signals with triggering on either edge of any digital signal.

Front Panel

• Display: Alphanumeric 2 × 16 characters LCD with backlight and automatic contrast control.
• LED Indicators: Three fixed (green, yellow, red) and eight programmable (red).
• HMI Controls: Four arrow buttons, clear/cancel, and enter buttons.
• Communication: Optically isolated serial port with an indicator LED.
• Password Protection: Two levels for settings and communication.