ABB Relion® 670 REC670 Bay Control IED | Intelligent Substation Controller

Product Description

Overview

The ABB REC670 is a high-performance Bay Control Intelligent Electronic Device (IED) within the Relion® 670 series, engineered for the protection, control, and monitoring of substation bays. It supports a wide voltage range, from medium voltage networks up to ultra-high transmission levels of 765 kV.

This device consolidates bay control, interlocking, monitoring, and backup protection functions into a single unit, enabling compact, reliable, and secure substation automation. It is suitable for standard bay arrangements or highly customized configurations, including 1 ½ breaker and mesh-corner topologies.

Core Functions

• Bay Control: Manages local and remote operations for all switchyard apparatus, including circuit breakers, disconnectors, and earthing switches.

• Interlocking: Prevents unsafe switching sequences to avoid equipment damage or operator error.

• Back-up Protection: Supplements primary relays with essential protective functions.

• Monitoring & Measurement: Provides precise voltage, current, and power measurements along with disturbance recording and phasor data.

Performance Characteristics

Control & Interlocking

• Select-before-execute operations for enhanced reliability.

• Multi-bay management for complex substation arrangements.

• Built-in synchrocheck and energizing check for safe breaker operation.

Integrated Protection

• Current Protection: Four-step phase and earth overcurrent, directional/non-directional, thermal overload, and breaker failure.

• Voltage Protection: Under- and overvoltage, residual overvoltage.

• Frequency Protection: Under-frequency, over-frequency, and df/dt monitoring.

Communication & Interoperability

• IEC 61850 Ed.1 & Ed.2 compliant with GOOSE messaging.

• PRP and HSR redundancy over dual Ethernet ports.

• Supports DNP3, IEC 60870-5-103, and Lon/SPA protocols.

Measurement Accuracy

• Voltage and current at 0.2 class; power at 0.5 class.

• Configurable as a PMU for synchronized phasor measurements.

Technical Specifications

Applications

• Centralized bay control in high-voltage substations.

• Integration with distributed IED networks for smart grid automation.

• Protection and monitoring of critical switchgear in transmission and distribution networks.

• Suitable for complex switchgear arrangements requiring high reliability.

FAQ

Q: What is the ABB REC670 used for?
A: It controls, monitors, and provides backup protection for substation bays, supporting voltages up to 765 kV.

Q: Can it handle multiple bays simultaneously?
A: Yes, with its high I/O capacity, a single unit can manage several bays in standard or complex arrangements.

Q: Does it support IEC 61850?
A: Fully compliant with IEC 61850 Ed.1 & Ed.2, including GOOSE messaging and redundancy protocols (PRP/HSR).

Q: What are the CT compatibility and limits?
A: Supports 2000/1 A and 100/5 A CTs with 5P20 accuracy class, cable loop resistance limits, and up to 40 kA fault current.