ABB UAA326A04 HIEE300024R4 Excitation Control Interface Module

Product Overview

ABB UAA326A04, part number HIEE300024R4, is an original control interface module specially designed for ABB UNITROL excitation systems. 

It undertakes signal conditioning, isolation transmission and power distribution functions inside the excitation cabinet, realizes high-speed signal interaction 

between main control board and power unit, widely applied in synchronous generator excitation regulation of thermal power, hydropower stations and heavy 

industry power systems. This is a critical spare component for maintenance and retrofit of power plant excitation equipment.

Technical Specifications

• Manufacturer: ABB
• Model: UAA326A04
• Part No: HIEE300024R4
• Applicable System: UNITROL series excitation system
• Function: Signal interface, signal isolation & processing, auxiliary power distribution
• Mounting: Plug-in rack installation
• Operating Temp: -20℃ ~ +60℃
• Humidity: 5%–95% non-condensing
• Insulation: High isolation design, anti-EMI interference
• Protection: Overvoltage, transient surge protection

• Revision: R4 hardware version

• 

Key Features

1. Professional design for generator excitation system, stable signal transmission under strong electromagnetic interference.
2. High isolation circuit, effectively block interference between power loop and control loop.
3. Industrial grade PCB components, long service life for continuous 24h operation in power plant.
4. Standard plug-in structure, convenient for on-site replacement and maintenance.

5. Support synchronous sampling and pulse signal transmission for thyristor rectifier bridge.

6.