ABB GPU2000R REG544 | 1SABB084621R0001 | Generator Protection Unit

Product Overview

The GPU2000R REG544 (1SABB084621R0001) is a high-performance, multifunction generator protection relay designed to safeguard synchronous generators across industrial, utility, and renewable energy sectors. As part of ABB’s proven GPU2000R series, this unit utilizes a triple-processor architecture to ensure high-speed fault detection and mitigation. It serves as a comprehensive solution for primary or backup protection, monitoring critical parameters such as voltage, frequency, phase angle, and excitation to prevent damage from electrical faults and abnormal operating conditions.

Technical Specifications

The GPU2000R REG544 (1SABB084621R0001) combines robust hardware with advanced logic processing for demanding power environments.

• Manufacturer: ABB (Origin: Switzerland)

• Model Designation: GPU2000R REG544

• Part Number: 1SABB084621R0001

• Device Type: Multifunction Generator Protection Relay

• Processor Architecture: Triple-processor system for simultaneous protection and control

• Voltage Input Range: 10V – 150V AC/DC

• Frequency Range: 45Hz – 65Hz (Supports 50Hz/60Hz systems)

• Protection Functions: Overvoltage (59), Undervoltage (27), Overfrequency (81O), Underfrequency (81U), Reverse Power (32R), Loss of Excitation (40), Overcurrent (50/51), Breaker Failure (50BF)

• Logic I/O: 8 Programmable logic inputs and 6 Configurable outputs

• Monitoring: Real-time tracking of excitation, phase angle, and power flow

• Timers: Integrated real-time machine running timers and alarm logging

• Communication: Supports IEC 61850, Modbus TCP/RTU, DNP3, and Ethernet

• Memory: Flash memory for field-executable software updates

• Operating Temperature: -40°C to +70°C (Extended industrial range)

• Dimensions: 200 × 200 × 100 mm

• Weight: 1 kg (Net unit weight); Gross shipping weight may vary

Functional Capabilities

• Triple-Processor Reliability: The GPU2000R REG544 (1SABB084621R0001) isolates protection logic from communication tasks, ensuring that fault detection remains uninterrupted even during heavy network traffic.

• Deterministic Fault Response: High-speed processing enables sub-cycle fault identification, critical for maintaining grid stability and preventing catastrophic generator winding damage.

• Flexible Logic Configuration: Programmable I/O allows for customized interlocking and tripping schemes, making it adaptable to complex substation or power plant architectures.

• Advanced Asset Management: Built-in machine running timers allow maintenance teams to track actual operational hours, optimizing service intervals for the generator set.