ABB REG670 1MRK002826-AA Generator Protection

Product Overview

The ABB REG670 (1MRK002826-AA) is an advanced Generator Protection Intelligent Electronic Device (IED) engineered for the most demanding power generation environments. Utilizing sophisticated microprocessor technology, it provides a comprehensive safety net for synchronous generators of all sizes. 

Technical Specifications

• Manufacturer: ABB

• Model Number: REG670 (Part: 1MRK002826-AA)

• Analog Inputs: Up to 24 configurable inputs for deep system monitoring.

• Detection Speed: Generator differential protection with a rapid 15 ms detection time.

• Stator/Rotor Protection: 100% coverage using injection-based and 3rd harmonic methods.

• Specialized Protection: Sub-Synchronous Resonance (SSR) protection for turbo-generators.

• Communication: Native IEC 61850 compliance for digital substation integration.

• Operating Temperature: Ultra-wide range from -40°C to +85°C.

• Power Supply: 24V DC.

• Certifications: Fully compliant with IEC 60255, IEEE C37.2, and UL standards.

• Physical: 300 x 280 x 100 mm; Weight: 4 Kg.

Key Features & Engineering Advantages

• Unrivaled Fault Detection: The 15 ms differential detection time is world-class, allowing the REG670 to isolate faults before the massive kinetic energy of a generator can cause irreparable stator core damage.

• 100% Stator Earth Fault Protection: Unlike standard relays, the REG670 covers the entire stator winding, including the neutral point, by combining 3rd harmonic voltage monitoring with low-frequency injection techniques.

• SSR Monitoring: For large turbo-generators connected to series-compensated lines, the integrated Sub-Synchronous Resonance protection prevents torsional oscillations that could lead to shaft fatigue or failure.

• Extreme Environment Resilience: With an operational rating up to +85°C, this IED is designed to thrive in the high-heat environments typical of power plant turbine halls and remote generator enclosures.

• Digital Substation Ready: Full support for IEC 61850-8-1 and IEC 61850-9-2 (Process Bus) allows the REG670 to interface with merging units via fiber optics, reducing copper wiring and increasing data integrity.