ABB REX010 HESG324426M1 All-in-One Protection Relay

Control Relay

The REX010 (HESG324426M1), part of the REX610 Relion family, is a versatile and freely configurable protection relay designed to manage the entire spectrum of basic power distribution applications. It represents a mechanical necessity for modernizing aging infrastructure, providing a cost-effective yet feature-rich platform.

Technical Specifications

• Manufacturer: ABB

• Model Designation: REX010

• Part Number: HESG324426M1

• Product Series: Relion REX610

• Device Type: Freely Configurable All-in-One Relay

• Communication Standard: IEC 61850 Edition 2 (DNV/GL KEMA Certified)

• Hardware Design: Fully modular and withdrawable plug-in unit

• Arc Protection: Three supervised arc sensor inputs

• Variants: 12 standardized variants covering all basic applications

• Mounting: Support for retrofit adapters (e.g., SPACOM replacements)

• Update Method: Continuous access to new functionality via firmware

• Configuration: User-tailored application-specific logic

Key Functional Characteristics

Modular and Scalable Architecture

The REX010 (HESG324426M1) is built for maximum flexibility. Unlike traditional fixed-function relays, its modular design allows for the replacement of individual hardware modules instead of the entire unit. This "plug-and-play" capability means that as protection requirements change—such as adding arc protection or new communication protocols—the relay can be upgraded in the field, ensuring the system remains current without significant capital reinvestment.

Comprehensive Protection Coverage

Leveraging ABB’s proven protection algorithms, the REX010 covers essential power distribution tasks including overcurrent, earth fault, and voltage protection. The inclusion of three supervised arc sensor inputs provides high-speed clearing of internal arc faults, significantly enhancing operator safety and preventing extensive damage to switchgear compartments during a fault event.

Optimized for Maintenance and Retrofitting

To minimize downtime, the REX010 (HESG324426M1) features a withdrawable plug-in unit. This allows for the swift replacement of the active electronics during testing or repair. Furthermore, specifically designed retrofit adapters are available to facilitate a smooth transition from legacy SPACOM relays to the modern REX610 platform, utilizing existing panel cutouts and minimizing wiring labor.