ABB REX010 HESG324426M1 Earth Fault Protection Unit

ABB REX010 HESG324426M1 Earth Fault Protection Unit

Product Overview

The ABB REX010 HESG324426M1 is an advanced earth fault protection relay engineered to protect vital electrical infrastructure from the risks of ground faults. Specifically designed for medium and high voltage applications, this unit is widely used in power generation, industrial facilities, substations, and other critical environments. It continuously monitors current flow to ground, providing fast and accurate detection of faults and initiating protective measures, such as circuit breaker trips, to prevent equipment damage and operational disruptions.

Key Features

• Comprehensive Earth Fault Detection
  Detects various types of earth faults in generators, transformers, motors, busbars, stators, and rotors, offering full-spectrum protection.

• Medium to High Voltage Applications
  Optimized for operation in electrical systems running at medium to high voltages, making it suitable for demanding utility and industrial environments.

• High Detection Accuracy
  Offers a precise fault detection accuracy of ±2%, ensuring dependable system performance and reduced false alarms.

• Wide Current Monitoring Range
  Capable of monitoring current values from 5 A to 2000 A, adaptable to a broad range of installations and equipment sizes.

• Rugged IP65 Housing
  Industrial-grade IP65-rated enclosure provides robust protection against dust, moisture, and water jets—ideal for harsh environments.

• Extended Temperature Tolerance
  Operates reliably in a temperature range from -20°C to +55°C, with storage tolerance down to -40°C and up to +85°C.

• SCADA/DCS Communication Support
  Includes integrated communication interfaces for remote management and monitoring, allowing integration into SCADA or DCS systems.

• Modular Design (Variant Dependent)
  Select models feature a modular construction for easier maintenance and quick part replacement, improving system uptime.

• Compatibility with Injection Transformers
  Designed to work in conjunction with ABB's REX011 injection transformer to deliver 100% stator and rotor earth fault protection, using low-frequency signal injection techniques.

Technical Specifications

Physical Specifications

Note: Weight and depth may vary by model or packaging. Always consult the official ABB datasheet for exact dimensions.

Conclusion

The ABB REX010 HESG324426M1 offers precise, dependable, and scalable protection against earth faults across a wide range of high-demand applications. With its robust housing, advanced communication, and compatibility with injection transformers for stator/rotor monitoring, the REX010 is a reliable cornerstone in industrial and utility electrical protection systems.