ABB UFC921A101 3BHE024855R0101 3BHE024856P201 Main Control Board

Technical Specifications

Model: UFC921A101

Part Number: 3BHE024855R0101 / 3BHE024856P201

Brand: ABB

Product Type: Excitation main processor control board

Matching System: ABB UNITROL 5000 series generator excitation system

Power Supply: Backplane DC power supply

Processing Unit: High‑speed industrial processor

Communication Interface: Multiple internal bus interfaces for excitation system

Installation Method: Cabinet plug‑in card installation

Operating Temperature: 0℃ ~ +60℃, non‑condensing

Protection Class: IP20

Weight: 0.48kg

Dimension: 220mm × 145mm × 30mm

Compatible System: Generator excitation control cabinet for power plant industry

Core Function: Serve as core processing unit of UNITROL excitation system, complete excitation regulation algorithm operation, signal processing, logic interlock, data communication and fault recording, realize stable excitation control for synchronous generator.

Product Details

The UFC921A101 3BHE024855R0101 3BHE024856P201 is main control processor board for ABB UNITROL 5000 generator excitation system.

This UFC921A101 board is the central computing component of excitation cabinet, responsible for running core excitation control algorithms.

It processes sampling signals of voltage and current, executes automatic voltage regulation logic, and completes interlock protection and status judgment.

It realizes high‑speed data interaction with other functional boards inside excitation cabinet via internal system bus.

It supports event log storage and disturbance recording, providing data basis for post‑fault analysis of generator equipment.

On‑board hardware self‑supervision circuit can detect board running status, and output alarm signal when hardware abnormality occurs.

Standard plug‑in structure, convenient for on‑site replacement and maintenance.

It is widely used in thermal power, hydropower and other generator set excitation transformation and maintenance projects.

It is important spare hardware for excitation system overhaul, control logic debugging and defective UFC921A101 board replacement.