Product Overview

The REB670 is a high-performance numerical protection relay from the ABB Relion 670 series, specifically engineered for the high-speed differential protection of busbars in medium- and high-voltage substations. As an Intelligent Electronic Device (IED), the REB670 integrates complex protection logic, real-time monitoring, and advanced communication capabilities into a single unit. It is designed to provide maximum selectivity, ensuring that internal busbar faults are cleared within milliseconds while maintaining absolute stability during external through-faults or heavy load conditions. This relay is a critical component for utility transmission grids, large-scale power plants, and industrial distribution networks where system availability is paramount.

Detailed Technical Specifications

• Manufacturer: ABB

• Model: REB670

• Series: Relion 670 Protection and Control Series

• Device Type: Numerical Busbar Protection Relay

• Protection Functions: Busbar differential protection (low/high impedance), breaker failure protection, backup overcurrent, and voltage supervision.

• Rated Current Input: 1 A or 5 A (Software/Hardware selectable)

• Rated Voltage Input: Up to 110 V AC

• Nominal Frequency: 50 / 60 Hz

• Auxiliary Power Supply: Wide range 24–250 V DC or 48–240 V AC

• Binary Inputs/Outputs: Scalable, programmable digital I/O for logic interlocking and signaling

• Communication Protocols: IEC 61850-8-1 (Ed. 1/Ed. 2), IEC 60870-5-103, Modbus RTU/TCP, DNP3

• Time Synchronization: Precision timing via SNTP, IRIG-B, or GPS (via specialized modules)

• Interface: Local HMI with high-resolution LCD and navigational keypad

• Operating Temperature: -25°C to +70°C

• Storage Temperature: -40°C to +85°C

• Mounting Configuration: 19-inch rack mount or panel flush-mount options

• Shipping Weight: 6.0 kg

• Standards Compliance: IEC 60255, CE, UL