ABB REG670 Relion® 670 Generator Protection IED | Intelligent Unit

Product Description

Overview

The ABB REG670 is an advanced Generator Protection Intelligent Electronic Device (IED) from the Relion® 670 series, designed for high-performance protection, control, and monitoring of generators, generator-transformer blocks, and auxiliary equipment in all types of power plants, including hydro, gas, steam, and combined-cycle facilities.

Engineered for both new installations and retrofits, REG670 combines flexibility, scalability, and high availability. Its modular architecture supports integration of main and back-up protection within a single IED, reducing hardware requirements, simplifying installation, and lowering lifecycle costs.

Core Functions

• Generator Differential Protection: Detects internal faults with ultra-fast operation (typical 15 ms).

• Earth-Fault Protection: Supports injection-based 100% stator and rotor protection and 3rd harmonic voltage-based stator protection.

• Sub-Synchronous Resonance (SSR) Protection: Mitigates damaging oscillations in turbo generators.

• Generator-Transformer Integration: Allows full protection coverage for the generator and associated step-up transformer.

Key Performance Characteristics

Advanced Protection Algorithms

• Fast and secure detection of phase-to-phase and ground faults.

• Injection-based protection via neutral or open-delta voltage transformers without modifying primary circuits.

• Differential protection that maintains high sensitivity under low-load conditions.

High Flexibility & Expandability

• Up to 24 analog inputs for integrating multiple protection zones.

• Expandable binary I/O (200+ inputs/outputs) for interlocking and signaling.

Communication & Integration

• Full IEC 61850 Ed.1 & Ed.2 support with GOOSE and Sampled Values (IEC 61850-9-2LE).

• PRP and HSR redundancy protocols for zero-recovery-time networking.

• Built-in PMU functionality for synchrophasor reporting (IEEE C37.118 compliant).

Precision and Synchronization

• Current/voltage measurement accuracy: class 0.2; power measurement: class 0.5.

• Supports high-precision time synchronization via PTP (IEEE 1588), GPS, IRIG-B, or SNTP.

Technical Specifications

Key Benefits

• Integrated Solution: Reduces IED count and wiring complexity while increasing system reliability.

• High Security: Select-before-execute logic with role-based access control and audit trails.

• Simplified Commissioning: Dedicated injection commissioning tool via PCM600 software.

• Cost-Efficient Protection: Combines main and back-up protection, optimizing CAPEX and OPEX.

Applications

• Centralized protection and monitoring for hydro, gas, steam, and combined-cycle generators.

• Generator-transformer protection blocks in large-scale power plants.

• Substation automation with IEC 61850-compliant digital communication.

• Systems requiring advanced earth-fault and sub-synchronous resonance protection.

FAQ

Q: What is ABB REG670 used for?
A: It provides comprehensive generator and generator-transformer protection, including differential, earth-fault, and SSR protection.

Q: Can REG670 integrate both main and back-up protection?
A: Yes, a single unit can handle multiple protection zones, reducing the need for additional IEDs.

Q: How fast is the differential protection operation?
A: Typical operating time is 15 ms, providing rapid response to internal faults.

Q: Is REG670 compatible with IEC 61850?
A: Fully compliant with Ed.1 & Ed.2, supporting GOOSE messaging and Sampled Values for digital substations.