3BHE012551R0001 UAD142A01 ABB Excitation Control Board

Product Overview

The ABB UAD142A01, identified by part number 3BHE012551R0001, is a high-integrity control module designed to serve as the computational heart of static excitation systems within the Advant-800xA ecosystem. This board is engineered to manage the complex regulation of field current for synchronous generators, ensuring precise control over output voltage and reactive power. By implementing deterministic control logic, the UAD142A01 maintains generator stability during transient load changes and grid fluctuations. It acts as the primary interface between the high-level DCS and the power electronic bridge, providing the rapid firing pulses and feedback processing required for modern power plant operations.

Key Technical Characteristics and Hardware Parameters

The UAD142A01 is built for mission-critical reliability, featuring advanced signal processing and multi-protocol communication capabilities for seamless system integration.

• Model Identification UAD142A01

• Order Number 3BHE012551R0001

• Module Function Excitation System Controller / AVR Board

• Control Algorithms Supports Automatic Voltage Regulation (AVR), Automatic Reactive Power Regulation (AQR), and Field Current Regulation (FCR)

• System Series Advant-800xA / UNITROL Excitation Systems

• Communication High-speed bus interface for real-time data exchange with DCS and monitoring tools

• Reliability Features Galvanic isolation of I/O channels and integrated self-diagnostic routines

• Operating Range Optimized for high-speed switching of static thyristor bridges

• Physical Mass 1.08 kg

• Chassis Dimensions 18.5 x 8.5 x 30.5 cm

• Manufacturing Origin Sweden

• Operational Status Active component for modern and legacy power generation systems

Industrial Applications and Operational Use Cases

The UAD142A01 3BHE012551R0001 is a fundamental component for any facility requiring ultra-stable power generation and synchronous machine control.

• Utility-Scale Power Generation Managing the excitation of large steam or gas turbines to ensure compliance with grid voltage requirements and reactive power limits.

• Hydroelectric Facilities Providing robust control for hydro-generators where rapid response to load shedding and hydraulic transients is essential.

• Synchronous Condenser Operation Regulating reactive power compensation in substations to maintain voltage stability across long-distance transmission lines.

• Industrial Co-generation Plants Coordinating the excitation of on-site generators within chemical or paper mills to ensure local grid stability during heavy motor starts.

• Excitation System Retrofitting Serving as a critical upgrade component for aging UNITROL systems, allowing for enhanced diagnostic reporting and 800xA DCS integration.