ABB UFC760BE142 3BHE004573R0142 Acquisition Interface Module

ABB UFC760BE142 (Order Number: 3BHE004573R0142)
Product Name: Excitation System High Voltage Isolation Signal Acquisition Interface Module

I. Basic Information
Brand: ABB
Module Model: UFC760BE142
Material Order Number: 3BHE004573R0142
Compatible System: UNITROL 5000/6000 Generator Set Excitation Control System (The same series UFC760BE145 is a derivative model of the same specification, with different channel configuration versions)
Installation Method: Standard rack plug-in installation, IP20 protection inside the cabinet
Power Supply: DC 24V
Operating Temperature: -20℃ to +60℃, with anti-electromagnetic protection coating, suitable for strong electromagnetic working conditions in power plants

Core Functions
High and Low Voltage Electrical Isolation Protection
Realize isolation between the high-voltage side of the excitation power and the low-voltage side of the AVR main control, with the highest isolation voltage of 1500VDC. Resist surge and interference in the excitation circuit, protect the main control board from being broken by high voltage.
Multi-channel Isolated Analog Signal Acquisition and Conditioning
Integrate 8 isolated analog input channels, support 4–20mA, 0–10V industrial standard signals. Acquire key operating parameters such as generator terminal voltage, excitation current, excitation voltage, and synchronous voltage, filter and amplify them, and upload to the excitation regulator main control unit.
Control Command Isolation Forwarding
Electrical isolation is performed on the trigger regulation command issued by the main control before transmitting it to the power rectification circuit, ensuring that the strong and weak electrical circuits do not interfere with each other, and stably achieving closed-loop regulation of generator voltage and reactive power.
Fault Signal Acquisition and Alarm Upload
Real-time acquisition of fault signals such as rectifier bridge imbalance, excitation overcurrent, rotor grounding, and power unit abnormalities, and upload to the excitation system and DCS background,联动 execute protection actions such as disconnection and current limiting.

Key Technical Parameters
Analog Input Channels： 8 independent isolated analog inputs
Single Channel Isolation Voltage： 1500VDC
Signal Acquisition Accuracy： ±0.1% FS
Communication Method： Board internal bus and high-speed data interaction with the excitation main control unit
Hardware Self-Diagnosis： Support fault diagnosis for open circuit and short circuit of channels， quick fault location by panel status indicator lights
Support hot-swappable rack， can be offline for spare part replacement

Application Scenarios
ABB UNITROL series static excitation system for synchronous generator sets in thermal power， hydropower， and gas-fired power plants. It is often used in conjunction with UFC762AE101 pulse trigger board and XVC767AE105 compensation monitoring board， responsible for isolated acquisition of analog signals from the excitation system and safe transmission of control signals.