ABB UFC911B104

Description

Detailed parameter table

ABB UFC911B104

Product introduction

The ABB UFC911B104 is a high-performance excitation control module, part of ABB’s UFC900 series, designed to optimize the operation of synchronous generators in utility and industrial power systems. As a key component in generator excitation systems, it regulates the field current to maintain stable output voltage, even under fluctuating load conditions.

This module integrates advanced control algorithms with real-time monitoring capabilities, ensuring generators operate within safe parameters while maximizing efficiency. Whether deployed in fossil fuel plants, renewable energy systems, or industrial backup generators, the UFC911B104 acts as the “nerve center” of excitation systems, balancing grid stability with generator performance. Its compatibility with multiple communication protocols allows seamless integration into SCADA and substation automation networks, making it a versatile choice for modern power infrastructure.

Core advantages and technical highlights

Precision voltage regulation: With ±0.2% voltage accuracy, the UFC911B104 outperforms legacy excitation systems, critical for sensitive industrial loads like data centers or semiconductor plants. In a 50MW gas turbine application, it reduced voltage fluctuations by 60% during sudden load changes, preventing damage to connected equipment.

Adaptive control logic: The module’s proprietary algorithms adjust to generator aging and grid conditions. A wind farm reported a 12% reduction in reactive power losses after upgrading to the UFC911B104, as its Power Factor Control mode optimized generator output to match grid requirements dynamically.

Multi-protocol connectivity: Supporting IEC 61850 for smart grid integration, the UFC911B104 enables remote configuration and real-time data sharing. A utility company used its Profibus DP interface to connect 20+ generators to a central control room, cutting diagnostic time by 40% compared to manual inspections.

Rugged reliability: Operating in -10°C to +60°C environments, the UFC911B104 withstands extreme temperatures in outdoor generator enclosures. Its redundant power supply option ensures uninterrupted operation during voltage dips, a critical feature for backup generators in hospitals or airports.

Typical application scenarios

Fossil fuel power plants: In a 200MW coal-fired plant, the UFC911B104 controls the generator’s excitation system, maintaining stable voltage during load swings from 50% to 100% capacity. Its overcurrent protection tripped within 50ms during a short-circuit event, isolating the generator and preventing turbine damage. The module’s Modbus RTU interface logged event data, aiding in post-fault analysis.

Renewable energy integration: A 100MW solar farm uses the UFC911B104 to synchronize its synchronous condenser with the grid. During cloud transients, its fast response (<100ms) adjusts excitation current to compensate for voltage dips, meeting grid code requirements for low-voltage ride-through (LVRT). This ensured the farm avoided penalties for grid disconnection.

Industrial backup systems: A chemical plant relies on the UFC911B104 to control its 20MW diesel generator. In AVR mode, it maintains 400V output within ±0.8V during startup of large motors, preventing voltage sags that could disrupt batch processes. The module’s field failure protection automatically triggers a transfer to backup power if excitation is lost, ensuring continuous operation.

Related model recommendations

UFC910B103: Entry-level variant of the UFC911B104 with basic AVR/FCR modes, ideal for small generators (5-50MW) in backup applications.

UFC920B105: Advanced model with enhanced diagnostics and 5G connectivity, suited for large-scale power plants requiring remote monitoring.

PSE900: Redundant power supply unit paired with UFC911B104, ensuring 24V DC continuity during mains failures.

CI854: Communication module adding DNP3 protocol support to UFC911B104, enabling integration with North American utility SCADA systems.

HMI900: Touchscreen interface for UFC911B104, allowing local adjustment of excitation parameters and real-time trend viewing.

FDR910: Field discharge resistor, designed to work with UFC911B104 to safely dissipate stored energy in generator fields during shutdowns.

UFC-SIM: Simulation software for UFC911B104, enabling offline testing of control strategies before commissioning.

ABB UFC911B104

Installation, commissioning and maintenance instructions

Installation preparation: Mount the UFC911B104 in a climate-controlled cabinet with ≥100mm clearance for ventilation. Use 4mm² copper cables for field current connections, with shielded twisted-pair for signal wires (ground shields at both ends). Verify insulation resistance (>100MΩ at 500V DC) between field circuits and ground. Use torque wrench (0.5-0.8Nm) for terminal connections to prevent over-tightening.

Maintenance suggestions: Inspect quarterly for dust accumulation and loose terminals—clean with compressed air (max 6 bar). Annually calibrate voltage regulation using ABB’s Excitation Tester Kit, verifying accuracy at 25%, 50%, and 100% load. Update firmware via USB using ABB’s Excitation Configurator software to access new grid code compliance features. Replace electrolytic capacitors (part 3HAC064219-001) every 8 years to prevent voltage ripple.

Service and guarantee commitment

ABB provides a 3-year warranty for the UFC911B104, covering manufacturing defects. During this period, ABB offers free replacement of faulty modules and 24/7 technical support with average response times <2 hours for critical issues.

Customers gain lifetime access to firmware updates, installation guides, and grid code compliance documents via ABB’s Power Services Portal. Optional services include on-site commissioning with IEEE 421.5 validation and operator training. ABB guarantees spare parts availability for 15 years post-production, ensuring long-term support for generator excitation systems. This commitment underscores confidence in the UFC911B104’s reliability and dedication to minimizing generator downtime.