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The UAD149A0011 (3BHE014135R0011) is a digital excitation controller from ABB’s AC800PEC series, designed for precise control of synchronous generators in power plants, industrial facilities, and grid stabilization applications. It ensures optimal field current regulation, enhancing generator performance while maintaining compliance with IEEE, IEC, and UL standards.
Technical Specifications (Click to expand)
Key Technical Parameters
1 Electrical Specifications
Input Power Supply:
Voltage: 100–240V AC/DC (±10%)
Frequency: 50/60 Hz (±5%)
Redundancy: Dual-redundant power inputs (optional)
Field Output:
Max Continuous Current: 20A (adjustable via external thyristors)
Voltage Range: Dependent on exciter type (typically 50–300V DC)
Short-Term Overload Capacity: 200% for 10 seconds
2 Control & Regulation
3 Protection Functions
Generator Protection:
Over-excitation / Under-excitation limiting
V/Hz (Volts-per-Hertz) protection
Field short-circuit detection
Rotor earth fault monitoring
System Fault Handling:
4 Communication & Interfaces
Standard Protocols:
Hardware Interfaces:
Analog I/O (4–20mA, ±10V DC)
Binary I/O (relay contacts, opto-isolated inputs)
Ethernet (for remote diagnostics)
5 Environmental & Mechanical
Operating Temperature: -25°C to +60°C (derating above 50°C)
Storage Temperature: -40°C to +85°C
Humidity: 5–95% (non-condensing)
Cooling Method: Natural convection or forced air (fan-assisted)
Enclosure Rating: IP20 (standard), higher protection optional
Compliance & Certifications
International Standards:
Safety Approvals:
Redundancy & Reliability Features
Modular Hot-Swappable Design: Allows replacement without shutdown.
Dual-Channel Control: Automatic switchover in case of failure.
Firmware Redundancy: Dual-bank memory for secure updates.
Typical Applications
Power Generation: Hydro, gas, and steam turbines.
Industrial Plants: Synchronous motors in heavy industries.
Grid Support: Black-start capability, reactive power compensation.
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