ABB REU610 Voltage Protection Relay

Product Description

REU610 is a multifunction voltage IED from ABB Relion 610 series, used for voltage protection, measurement and supervision in medium voltage utility and industrial power systems. It adopts pluggable withdrawable design for simple installation and replacement. This legacy relay has been discontinued since 2017 and is widely used as spare part for existing switchgear protection systems.

Product Functions

• Two-stage overvoltage and undervoltage protection with definite-time or IDMT curves
• Two-stage residual overvoltage protection for earth fault supervision
• Optional negative sequence overvoltage protection for unbalanced voltage faults
• Programmable digital inputs and relay outputs for trip, alarm and interlock logic
• Supports busbar automatic transfer and anti-islanding disconnection control
• Built-in measurement, fault recording and self-diagnosis functions

Applications

• Busbar voltage supervision for medium voltage distribution substations
• Transformer overvoltage and overexcitation backup protection
• Motor undervoltage protection and capacitor bank monitoring
• Earth fault detection for isolated neutral power networks
• Industrial plant, power station and oil & gas distribution switchgear

FAQ