GRID BREAKER UNIT GBU72 3BHE055094R0002 / 3BHE031197R0001 / 3BHB030310R0001

ABB Generator Circuit Breaker GBU72 3BHE055094R0002

Main Features and Advantages

High-Performance Protection: The ABB GBU72 3BHE055094R0002 delivers exceptional fault-clearing capability with 120 kA symmetrical breaking capacity. Its SF6 gas insulation provides superior arc quenching performance while maintaining compact dimensions, making it ideal for space-constrained power plant installations.

Robust Mechanical Design: Featuring a spring-assisted hydraulic operating mechanism, this circuit breaker ensures reliable operation under extreme conditions with ≤60 ms opening time. The pressurized stainless steel enclosure protects critical components from environmental contaminants and maintains gas integrity throughout its operational life.

Generator-Specific Engineering: Designed specifically for generator protection applications, the GBU72 handles high asymmetrical currents and rapid transient recovery voltages (TRV) that conventional breakers cannot withstand. Its special contact design minimizes arcing time during fault clearance, protecting generator windings from damage.

Integrated Monitoring: Equipped with gas density monitoring, operation counters, and mechanical condition indicators, the GBU72 provides comprehensive operational data for predictive maintenance planning. The modular design allows easy integration with digital substation systems through IEC 61850 communication protocols.

Application Areas

Essential for generator protection in power plants, cogeneration facilities, and industrial power generation systems. Specifically designed for direct connection between generators and step-up transformers in applications ranging from 100 MVA to 800 MVA capacity.

Related Products

• ABB REF615 – Protection Relay: Generator protection for GBU72 systems
• ABB VD4 – Vacuum Circuit Breaker: For auxiliary systems protection
• ABB RTU560 – Control Unit: Remote monitoring interface

Since 2011, we’ve provided critical power equipment solutions with expert technical support. Contact our power systems engineers via WhatsApp for application studies and installation guidance.

Each GBU72 3BHE055094R0002 includes:

1. 1-year comprehensive warranty with technical support
2. Factory test reports and certification documents
3. Installation and commissioning guidelines

Custom power protection solutions available:
Email: sales@saulcontrol.com
Phone: +86 18150899970
Technical Support: +86 180 5988 4797 via WhatsApp