ABB 3BHB002916R0001 UFC721AE High‑Speed Signal Processing Board for UNITROL Excitation System

Description

Hardware and Performance Specifications Auxiliary supply: 24 V DC, 18‑30 V DC wide‑range input Power consumption: ≤10 W Analog Inputs: Multi‑channel galvanic‑isolated high‑speed analog inputs for VT/CT and rotor measuring signals Resolution: 24‑bit high‑precision ADC Signal accuracy: ±0.05 % full‑scale Isolation voltage: Reinforced isolation between field measuring side and system internal circuit Communication interfaces: Excitation rack internal high‑speed back‑plane bus Mounting mode: Subrack plug‑in PCB for UNITROL5000 excitation cabinet Protection class: IP20 Operating temperature: ‑25 ℃ ~ +70 ℃ Storage temperature: ‑40 ℃ ~ +85 ℃ Humidity: 5‑95 %RH non‑condensing EMC compliance: Comply with IEC 61000‑4 series industrial electromagnetic‑compatibility standards Dimension & weight: 240 × 160 × 35 mm, weight approx. 0.48 kg Certifications: CE approval

Main Functions Real‑time sampling and conditioning of generator VT, CT and rotor‑winding measuring signals for excitation control closed‑loop calculation. High‑speed A/D conversion for multi‑channel analog measuring quantities, upload sampled data to excitation main controller through back‑plane bus. Signal processing for rotating‑diode monitoring function of brushless excitation systems. Surge‑protection and anti‑interference filtering for field measuring loops. Front‑panel LED indicators display power‑on status, running status and hardware fault alarm codes for on‑site inspection. Hardware self‑diagnosis detects input‑channel abnormality, signal over‑range and internal circuit faults, upload fault alarm information to excitation main unit. Parameter configuration and channel calibration are completed by ABB excitation engineering software.

Installation Requirement Plug‑in installation inside UNITROL5000 excitation subrack. High‑power power cables and weak‑signal measuring cables shall be routed separately. Ensure reliable cabinet protective grounding. Auxiliary 24 V DC power supply shall stay within rated operating range. After board replacement, confirm full part‑number UFC721AE 3BHB002916R0001 strictly matches original excitation‑system configuration, download complete excitation configuration file. Perform analog‑channel calibration, back‑plane bus communication test and measuring‑loop signal verification. Different hardware revisions cannot be directly interchanged without firmware and configuration adaptation. Do not put into service until no hardware self‑diagnosis fault alarm exists.

Typical Application Scenarios High‑speed signal‑processing spare‑part for UNITROL5000 static excitation‑systems of large‑capacity synchronous generators in thermal‑power plants, hydropower plants and large‑scale industrial captive‑power‑stations; used for excitation‑system maintenance and spare‑part replacement.

Key Features

1. Dedicated high‑speed signal‑processing board for UNITROL5000 excitation platform, 24‑bit high‑resolution ADC ensures high‑precision measurement for generator‑related signals.
2. Reinforced galvanic‑isolated input channels, excellent anti‑interference performance for harsh electromagnetic environment in power‑plant site.
3. Support rotating‑diode monitoring signal processing for brushless excitation units.
4. Plug‑in subrack‑mount structure, convenient for on‑site replacement and maintenance.
5. Strict full‑part‑number matching shall be observed during spare‑part replacement; cannot be substituted by other similar‑type signal boards without adaptation.