ABB REU610 Relion 610 Series Voltage Protection Relay

Hardware Specifications

ABB Relay Measurement and Protection Functions

The REU610 accepts three phase-to-phase voltage measurements together with residual voltage. It calculates positive and negative phase-sequence voltages for protection and monitoring functions.

The relay provides two-stage overvoltage and undervoltage protection. In addition, it provides two-stage residual overvoltage protection, single-stage negative phase-sequence overvoltage protection, and single-stage positive phase-sequence undervoltage protection.

For voltage supervision, the relay calculates voltage averages over 1-minute and user-defined periods. It also tracks maximum and minimum measured voltage values.

The built-in disturbance recorder stores analog and digital signals. It supports 4 analog channels and 8 digital channels and uses battery backup for recorder operation.

ABB provides multiple communication options for the REU610, including IEC 61850, IEC 60870-5-103, DNP3, Modbus, Profibus, LON, and SPA. The applicable interface depends on the installed hardware configuration.

Frequently Asked Questions

Q: What voltage signals does the REU610 measure?
A: The relay measures three phase-to-phase voltages and residual voltage (Uo).

Q: How many channels does the integrated disturbance recorder support?
A: The disturbance recorder supports 4 analog signal channels and 8 digital signal channels.

Q: Does the REU610 support multiple communication protocols?
A: Yes. The supplied specifications list IEC 61850, IEC 60870-5-103, DNP3, Modbus, Profibus, LON, and SPA.

Field Installation Guidelines

• Confirm the relay ordering configuration before installation because communication and auxiliary power options can vary by hardware configuration.
• Verify all voltage input wiring against the protection scheme and relay terminal assignment before energizing the circuit.
• Maintain appropriate separation between voltage measurement wiring and high-current power conductors.
• Connect cable shields according to the switchgear grounding design and the applicable electrical installation standard.
• Check phase identification and voltage polarity before commissioning protection functions.
• Verify residual voltage wiring independently before enabling residual overvoltage protection.
• Confirm communication wiring, protocol selection, and addressing before connecting the relay to the station network.
• Perform functional testing of each configured protection stage before placing the relay into service.
• Use the disturbance recorder during commissioning to verify that analog and digital event channels capture the intended signals.
• Follow the applicable ABB installation documentation for the exact hardware variant, terminal arrangement, and auxiliary supply configuration.