UAD149 3BHE014135R0011/UAD149A00-0-11 | Excitation control unit

UAD149 3BHE014135R0011/UAD149A00-0-11 | Excitation control unit | UAD 149

Categories: ABB

Tags: UAD 149 UAD149 3BHE014135R0011/UAD149A00-0-11

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Product content

The ABB UAD149 3BHE014135R0011/UAD149A00-0-11 Excitation Control Unit is a high-performance solution designed for precise field regulation and power stability in synchronous motors and generators. As part of ABB’s advanced automation portfolio, this unit integrates cutting-edge digital signal processing and modular architecture to ensure reliable operation in critical industrial applications, including power generation, heavy machinery, and renewable energy systems.

The UAD149 3BHE014135R0011/UAD149A00-0-11 supports full-digital excitation control with adaptive algorithms, such as Automatic Voltage Regulation (AVR) and Excitation Current Limitation (ECL), enabling dynamic response to load fluctuations and grid disturbances. Its core capabilities include 8-channel analog input for real-time monitoring of armature voltage, current, and temperature, combined with redundant 24V DC power supply for continuous operation. The unit’s compact DIN rail design allows seamless integration with ABB’s AC 800M and DCS 800xA systems, enhancing system flexibility and scalability.

Engineered for harsh industrial environments, the UAD149 3BHE014135R0011/UAD149A00-0-11 features EMI/EMC protection and a wide operating temperature range (-20°C to +60°C). It complies with global standards like IEEE 421.5 and IEC 60034, making it ideal for applications requiring high reliability and safety.

Technical Specifications

Parameter Name	Parameter Value
Product Model	UAD149 3BHE014135R0011/UAD149A00-0-11
Manufacturer	ABB
Product Type	Excitation Control Unit
Control Target	Synchronous Motors/Generators
Input Channels	8 differential analog inputs (0-10V/4-20mA)
Output Type	4-20mA excitation current control
Control Algorithms	AVR, ECL, PID with adaptive tuning
Response Time	<10ms (voltage step response)
Voltage Regulation	±0.5% accuracy
Power Supply	Redundant 24V DC (±10%)
Dimensions	150mm × 100mm × 200mm
Mounting Method	35mm DIN rail (hot-swappable)
Communication Protocols	Modbus RTU, PROFIBUS DP, IEC 61850
Protection Features	Overvoltage, overcurrent, overtemperature

Key Features & Advantages

Adaptive Digital Control:
The UAD149 3BHE014135R0011/UAD149A00-0-11 uses advanced algorithms to dynamically adjust excitation levels, ensuring stable voltage output under varying loads. Its adaptive PID tuning optimizes performance for applications like wind turbines and industrial drives.

Redundant Architecture:
Dual power supply inputs and modular design minimize downtime. If one channel fails, the unit automatically switches to redundancy, maintaining continuous operation.

Smart Diagnostics:
Real-time monitoring of excitation current, power factor, and temperature via integrated LEDs and remote alerts allows proactive maintenance. Fault codes can be accessed through ABB’s Control Builder F software for quick troubleshooting.

Wide Compatibility:
Compatible with ABB’s PM866A controllers and AI880 analog modules, the unit integrates seamlessly into existing DCS systems. It supports multiple communication protocols for flexible integration with SCADA and cloud platforms.

Application Areas

Power Generation:
Used in thermal and hydroelectric plants to stabilize grid voltage and improve power quality during load changes.

Renewable Energy:
Controls excitation in wind and solar generators to maximize energy conversion efficiency and grid synchronization.

Industrial Machinery:
Optimizes performance in large synchronous motors for applications like steel rolling mills and pumps, reducing energy consumption and wear.

Marine & Rail:
Ensures reliable power supply in shipboard generators and railway traction systems, withstanding harsh environmental conditions.

Installation & Maintenance

Installation:

Mount the UAD149 3BHE014135R0011/UAD149A00-0-11 on a 35mm DIN rail in a clean, well-ventilated enclosure.
Connect armature voltage, current, and temperature sensors using shielded cables.
Configure parameters via ABB Control Builder F, including voltage setpoints and protection thresholds.

Maintenance:

Clean dust from ventilation slots quarterly to prevent overheating.
Verify output voltage stability annually using a precision multimeter.
Replace faulty modules online (hot-swap) during scheduled downtime.

Product Warranty & Support

ABB provides a 24-month warranty covering defects in materials and workmanship. Global support includes:

24/7 technical assistance from certified engineers.
Fast delivery of genuine spare parts (48-hour emergency service).
Training programs on excitation system operation and maintenance.

The UAD149 3BHE014135R0011/UAD149A00-0-11 is certified to meet international safety standards (IEC 61508 SIL 2, UL), ensuring compliance with industry regulations.

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