Product overview
The ABB UAD149A1501 3BHE014135R1501 excitation control unit is the core component of ABB Industrial Automation’s high-performance excitation system designed for synchronous motors and generators to achieve precise field regulation and power stability control. As the flagship model of ABB’s excitation product line, UAD149A1501 is widely used in power generation, industrial drive and new energy fields through advanced digital signal processing technology and modular design to ensure efficient operation of equipment under complex conditions.

UAD149A1501 supports full digital excitation control, integrates automatic voltage regulation (AVR), excitation current limitation (ELR), overvoltage protection (OVP) and other functions, can be compatible with synchronous motor, synchronous generator and permanent magnet synchronous motor excitation requirements. Its core advantages are dynamic response speed (<10ms) and wide range of regulation ability (0-100% excitation current), voltage stability and fast compensation of load sudden change through closed-loop control algorithm. The unit adopts redundant power supply design (dual 24V DC input), supports hot swap operation, and can be seamlessly integrated into ABB AC 800M, DCS 800xA and other control systems, significantly improving the reliability and energy efficiency of industrial equipment.

Product model: UAD149A1501 3BHE014135R1501
Manufacturer: : Excitation control unit
Control object: synchronous motor, synchronous generator
Input channels: 8 differential analog inputs (voltage/current/temperature)
Output type: 4-20mA excitation current control signal
Control algorithm: adaptive PID, vector control, AVR
Response time: <10ms (voltage step response)
Adjustment range: 0-100% excitation current (continuously adjustable)
Operating voltage: 24V DC (±10%)/redundant power supply
Physical size: 150mm×100mm×200mm
Mounting method: 35mm DIN rail (hot swappable)
Operating temperature: -20℃ to + 60℃
Communication protocols: Modbus RTU, PROFIBUS DP, IEC 61850
Protection function: over voltage, over current, over heat, loss of magnetic protection

Related products
ABB UNS1400 excitation controller: Supports higher power output, high and low matching with UAD149A1501, suitable for large generators.
ABB PM866A Controller: A high-performance CPU module that works with the UAD149A1501 to execute complex control logic.
ABB PS802 Power module: Provides 24V DC power for the UAD149A1501 to ensure system stability.
ABB AI880 Analog input module: Expands the input channel of the UAD149A1501 to support more sensor access.
ABB CI853 communication module: supports PROFIBUS DP protocol to realize high-speed data transmission between UAD149A1501 and host computer.
ABB TB820-2V2 terminal board: used together to simplify UAD149A1501 signal wiring.
ABB UAD149A0011: Basic analog input module, which can be used as an auxiliary module of the UAD149A1501 to expand system functions.
ABB 3BHE014135R0011: Early model, similar in function to UAD149A1501, available as a replacement spare part.
ABB UAD149A1502: Upgraded module, add HART communication function, support intelligent transmitter two-way data interaction.
ABB 3BHE014135R1502: Supports more control algorithms and is backward compatible with the UAD149A1501 system configuration.