1. Product Introduction

The ABB REC670 is a member of the Relion® 670 series from ABB, functioning as a high-performance, multi-functional line backup protection and control relay. It is specifically designed for transmission lines and cables in high-voltage and extra-high-voltage power grids, especially for complex systems requiring fast, selective protection and advanced communication capabilities.

• Series: Relion® 670 Series

• Purpose: Backup protection, distance protection, and control for transmission lines, cables, and interconnected lines.

• Positioning: High-end, complex power grid applications.

2. Key Features

The REC670 offers comprehensive protection, control, monitoring, and communication functions:

• Line Protection:

  • Distance Protection: Typically five- or six-zone distance protection, providing high-speed, selective fault detection.

  • Backup Protection: Provides overcurrent, earth-fault, zero-sequence voltage, and other backup protection functions.

  • Dual Breaker / Multi-Terminal Lines: Supports protection schemes for complex topologies (e.g., double busbar, multi-terminal lines).

• Control Functions: Integrated control of circuit breakers, disconnectors, and earthing switches for local and remote operation.

• Automation Functions: Supports advanced automation logic such as auto-reclosing, power swing detection, and fault location.

• Monitoring and Diagnostics:

  • Fault Recording and Event Logging: Records detailed fault data for fault analysis.

  • Self-Diagnosis: Continuously monitors its own hardware and software status.

• Communication and Interoperability: Supports various communication protocols, notably IEC 61850, enabling seamless communication and interoperability within the substation automation system.

3. Technical Specifications

While the REC670 is a flexible platform, and specific parameters depend on the configuration, some typical specifications include:

• Supply Voltage: Typically supports a wide range of DC or AC supply (e.g., $24 \text{ V DC}$ / $100 \text{ V AC} - 240 \text{ V AC}$).

• Temperature Range: Wide operating temperature range (e.g., $-25^\circ\text{C}$ to $+70^\circ\text{C}$).

• Protection Types: Distance protection (e.g., $Z_1, Z_2, Z_3, Z_4, Z_5$), overcurrent, earth fault, power swing detection, etc.

• Communication Protocols: IEC 61850 (GOOSE, MMS), Modbus RTU/TCP, DNP3, etc.

• Mounting: Rack or flush mounting.

4. Keywords

Line Protection, REC670, Distance Protection, Relion 670, IEC 61850, Transmission, Substation Automation, Control Relay.

5. Summary

The ABB REC670 is a flagship multi-function protection and control relay designed for transmission systems. It combines high-speed, selective distance protection, advanced automation functions, and powerful IEC 61850 communication capability, making it a critical device for achieving highly reliable grid operation in modern, smart substations.