ABB UAD215A102 (3BHE02284R0102) excitation control unit
UAD215A102 (3BHE02284R0102) is a CSI converter signal interface board for ABB UNITOL 6000 series static excitation systems. Its core is used for synchronous generator excitation regulation, pulse triggering, and system protection. It is a key interface module between the excitation power unit and the main control unit.

1、 Basic Information
Model: UAD215A102
Material number: 3BHE026284R0102
Series: UNITROL 6000 (Static Excitation System)
Manufacturer: ABB (Sweden)
Type: CSI Converter Signal Interface Board (Excitation Control/Pulse Trigger)
Functional positioning: excitation current regulation, thyristor/IGBT pulse triggering, signal isolation, system protection
Status: In production, mainstream spare parts
Compatible models: UNITROL 6010/6020/6030 excitation controller
2、 Technical parameters
1) Electrical specifications
Working voltage: DC 24V (± 10%)
Signal level: 30V/500V (compatible with different excitation power units)
Control method: Full digital DSP control, closed-loop PID regulation
Trigger output: 6-channel pulse trigger (compatible with three-phase rectifier bridge)
Isolation withstand voltage: 2500VAC (strong and weak current isolation)
Protection function: overvoltage/undervoltage/overcurrent/short circuit/demagnetization protection
2) Interface and Communication
Analog input: 4 × AI (0-10V/4-20mA, generator voltage/current/excitation current)
Digital input: 8 × DI (24VDC, switch status)
Digital output: 4 × DO (24VDC/1A, trigger signal/alarm output)
Communication: Supports Modbus TCP/IP, Profibus DP, IEC 61850 (optional)
Debugging interface: RS-232/USB (parameter configuration, firmware upgrade)
3) Physics and Environment
Dimensions (width x height x depth): 220 mm x 150 mm x 30 mm
Weight: Approximately 1.2 kg
Working temperature: -20 ℃~+70 ℃
Storage temperature: -40 ℃ to+85 ℃
Protection level: IP20 (installed inside the cabinet)
Seismic resistance: 1g (5-500 Hz), in accordance with IEC 60068-2-6
3、 Core functions
Accurate regulation of excitation current: Closed loop PID control maintains stable voltage and reactive power balance at the generator end, with fast dynamic response (≤ 10ms).
Pulse trigger control: Generate thyristor/IGBT trigger pulses, control rectifier bridge output, and adapt to excitation power units below 500V.
Signal isolation and conditioning: analog/digital signal isolation, filtering, surge suppression, anti electromagnetic interference, suitable for industrial strong interference environments.
System protection and diagnosis: Real time monitoring of excitation parameters, rapid tripping and reporting of alarms in case of faults, supporting remote diagnosis and data recording.
Redundancy support: Supports dual module redundant parallel connection, automatic fault switching, ensuring continuous operation of the excitation system.
4、 Typical application scenarios
Thermal power/hydropower/nuclear power: Static excitation system interface for synchronous generators (10-1000MW)
Industrial power plants: self owned power plants, waste heat power generation, biomass power generation excitation control
Renewable energy: Wind/photovoltaic grid connected synchronous machine excitation regulation
Motor Drive: Excitation Control for Large Synchronous Motors (Compressors, Pumps, Fans)
5、 Related models (UAD215 series)
UAD215A101 (3BHE02284R0101): Basic version, 30V voltage level
UAD215A104 (3BHE02284R0104): Enhanced version, 500V voltage level, with redundant interfaces
UAD215A105 (3BHE02284R0105): High end version, 1000V voltage level, supports IEC 61850