ABB REB 500-CU03 Central Unit

Product Brief Description

ABB REB500-CU03 is the central control unit for the REB500 distributed numerical busbar protection system. It acts as the system core and manager, responsible for system configuration, bus zone logic management, data synchronization with bay units, fault evaluation, disturbance recording and communication with station SCADA and HMI systems. It supports up to 60 bay units and 32 independent busbar protection zones for medium, high and extra-high voltage substation busbar protection.

Product Functions

• System master controller for REB500 busbar protection, coordinating all connected bay units (BU03)
• Dynamic busbar topology replica and zone assignment logic management
• High-speed differential fault calculation and selective trip decision for internal bus faults
• Process bus time synchronization and real-time current data collection from bay units
• Built-in disturbance recorder covering all 32 bus zones for post-fault analysis
• Binary input / output interface for central trip signals, blocking and interlock commands
• Local HMI with LED indicators, front Ethernet port for commissioning and monitoring
• Supports IEC 61850, IEC 60870-5-103 communication protocols

Application Scenarios

• HV / EHV utility transmission and distribution substations
• Large industrial power substations for oil & gas, chemical, mining and metallurgy plants
• Power plants auxiliary busbar protection
• Critical infrastructure power stations: data centers, airports, hospitals
• Single bus, double bus, one-and-a-half breaker, ring bus and transfer bus schemes

FAQ