Product Description

Overview

The REB500BU (1KHL160006R0001H) is a high-performance Bay Unit designed for the ABB REB500 distributed busbar protection system. This module provides precise, high-speed acquisition of current and voltage signals from the primary substation equipment and executes both local and centralized protection functions. It is installed in individual feeder cubicles and communicates with the Central Unit over fiber-optic networks, ensuring reliable and fast protection for complex substation configurations.

Key Features

• Distributed Protection Architecture: Each Bay Unit operates autonomously for local fault detection while integrating seamlessly with the Central Unit for system-wide busbar protection.

• Rapid Fault Response: Sub-cycle tripping (<15 ms) preserves system stability and prevents equipment damage during busbar faults.

• High-Precision Measurement: Advanced ADCs provide accurate current and voltage sampling for differential and overcurrent protection.

• Local Redundancy: Supports autonomous protection functions such as Breaker Failure Protection (BFP) and End Fault Protection.

• IEC 61850 Compliant: Enables GOOSE messaging and MMS communication for modern substation automation.

• CT Supervision: Monitors current transformer circuits to detect open or malfunctioning CTs and prevent misoperation.

• Flexible Mounting Options: Rack-mounted or panel-mounted installation with compact dimensions (100 × 160 × 160 mm).

• Advanced Cybersecurity: Centralized account management, user access control, and activity logging ensure secure operation.

Technical Specifications

Application Scenarios

Ideal for high-voltage substations requiring fast, selective protection of busbar systems. Supports integration into digital substations, SCADA, and modern automation networks with IEC 61850 compliance.

FAQ

Q: Can the REB500BU operate if the Central Unit fails?
A: Yes, it provides autonomous local protection including Breaker Failure and End Fault logic.

Q: How many Bay Units can a single REB500 system support?
A: Up to 60 bay units can be integrated into one system for large-scale substations.

Q: Is fiber-optic communication mandatory?
A: Fiber optics ensure high-speed, interference-free data exchange, but star or ring topologies are supported.