Description

The ABB GBU72 Grid Breaker Unit (comprising models 3BHE055094R0002, 3BHE031197R0001, and 3BHB030310R0001) is a mission-critical protection and switching module designed for high-voltage power distribution and industrial control systems. Serving dual roles as a redundancy controller in ABB’s AC800M DCS and as a grid interface unit in substation automation, this platform ensures operational continuity during faults or maintenance. The ABB GBU72 integrates ultra-fast microprocessor-based protection (≤2ms response) with mechanical breaker control, synchronizing seamlessly with ABB Relion relays and SACE Emax circuit breakers. Its hot-swappable design supports live replacement in energized switchgear, while conformal-coated electronics withstand harsh environments (-40°C to +85°C). For power networks, the ABB GBU72 executes automatic transfer schemes (ATS) and load shedding; in process plants, it provides SIL 3-rated failover for safety systems. The modular architecture scales from 6kV to 36kV applications, featuring IEC 61850 GOOSE communication for grid-wide coordination.

ABB GRID BREAKER UNIT GBU72 3BHE055094R0002 3BHE031197R0001 3BHB030310R0001

Technical Specifications

Main Features and Advantages

Grid Resilience: The ABB GBU72 employs adaptive protection algorithms that dynamically adjust trip curves based on real-time load profiles, preventing nuisance tripping during motor startups. Its arc-flash detection uses light sensors + overcurrent correlation to trigger breaker opening in <4ms>

Seamless Redundancy: In AC800M DCS configurations, the 3BHE055094R0002 variant synchronizes dual PM866 processors with 50ms state replication. Lossless switchover maintains process integrity during controller failures.

Cyber-Physical Security: Hardware-enforced IEC 62351 compliance includes message authentication (SHA-256) and encrypted firmware updates. Physical tamper detection logs unauthorized access attempts.

Lifecycle Efficiency: Unified configuration via ABB PCM600 software reduces commissioning time by 70%. Front-mounted health indicators (LED) display capacitor wear, contact erosion, and synchronization status.

Application Field

The ABB GBU72 secures critical infrastructure across energy and industrial sectors:

Substations: Implements busbar protection schemes in 132kV GIS switchyards, interfacing with ABB REF615 relays via IEC 61850.

Renewables: Manages grid connection for 100MW solar farms, executing LVRT (Low Voltage Ride-Through) during 30% voltage dips.

Industrial Plants: Provides SIL 3 backup for compressor anti-surge controllers in LNG facilities; switches to standby feeders during utility outages.

Mining: Protects 11kV shovel drives from phase imbalances in remote sites with <10ms>

Data Centers: Enables 0-transfer-time ATS between mains and diesel generators.

ABB GRID BREAKER UNIT GBU72 3BHE055094R0002 3BHE031197R0001 3BHB030310R0001

Related Products

ABB Emax 2 E2.2: Air circuit breaker for GBU72 control

REF615: Protection relay for feeder integration

PM866AK01: Redundant processor for DCS pairing

SACE Tmax XT: Molded-case breaker (compatible with 3BHE031197R0001)

CI867: IEC 61850 communication interface

ABB HECPS360: High-energy capacitor bank for GBU72 DC backup

SD822: Redundant digital input module

Installation and Maintenance

Pre-installation preparation: Verify insulation resistance (>100MΩ @ 5kV) for grid-connected variants. For DCS integration, pre-load configuration via Control Builder M. Ensure segregated 10mm² grounding for control/logic circuits.

Maintenance recommendations: Test protection logic annually using Omicron CMC 356 injector. Replace electrolytic capacitors after 80,000 hours. Monitor contact resistance quarterly (target <25>ABB GBU72 via front isolator before servicing – busbars remain energized!