Description
‑ Power Supply: Powered by excitation rack back‑plane bus, 24 VDC auxiliary power
‑ Power Consumption: approx 11.8 W
‑ Mechanical Structure: Eurocard plug‑in board for UNITROL rack, metal front panel, back‑plane bus connector
‑ On‑board Resources: 32‑bit high‑performance processor unit, flash memory for firmware and parameter storage, SDRAM for real‑time data cache, internal back‑plane bus controller, logic processing unit, module self‑diagnosis circuit, conformal‑coating protection layer
‑ Communication Interface: Internal dedicated high‑speed back‑plane bus for each functional board inside rack
‑ Galvanic Isolation: Internal logic power adopts galvanic isolation, isolation rating 2500 VAC
‑ Core Function: AVR voltage‑regulation closed‑loop calculation, excitation protection algorithm, excitation limit logic, sequence control, internal resource scheduling, event‑recording and disturbance‑recording storage
‑ Protection: internal over‑voltage, over‑current monitoring for on‑board circuit
‑ Status LED Indicators: Power indicator, Module Fault indicator, running status LED, system alarm LED
‑ Weight: approx 1.02 kg
‑ Acts as core main‑control unit of UNITROL6000 excitation rack, executes AVR automatic voltage‑regulation closed‑loop algorithm, realizes generator terminal voltage stable control.
‑ Runs complete excitation protection and multiple‑set excitation limit logic (over‑excitation, under‑excitation, stator‑current limit etc.), performs alarm or trip action according to operating condition.
‑ Implements system sequence control, manages startup‑shutdown logic, paralleling interlock condition judgment, coordinates data exchange between sampling board, communication board, PSS board, synchronization board and I/O boards via back‑plane bus.
‑ Stores excitation firmware, multi‑group generator parameter sets, fault event logs and disturbance‑recording data; supports parameter downloading and event reading via external communication boards.
‑ Module self‑diagnosis monitors processor operating status, memory health, rack power‑supply and back‑plane bus communication; detects system hardware abnormality, uploads fault‑alarm information. Conformal‑coating improves long‑term reliability under harsh power‑plant site condition.
‑ Cannot run independently; all other functional boards must cooperate with this main processor board. HENF452692R1 is hardware revision variant of G3FD series; pin‑compatible within G3FD revision family, cannot directly interchange with other series excitation boards.
‑ Continuously monitors system running status, memory integrity, internal bus communication and module hardware health. Detected faults activate fault LED and output system fault word.
‑ No local numerical display; operating parameters, event records and fault codes are read via excitation commissioning tool or upper‑level HMI workstation.
‑ Module hardware failure will cause total failure of excitation system; AVR regulation, protection, communication and all auxiliary functions stop working, generator excitation trip occurs.
‑ Back‑plane connector: connects to excitation rack internal high‑speed bus, exchanges data, commands and diagnostic status with all other plug‑in functional boards.
‑ Mounting: Plug‑in installation inside UNITROL excitation cabinet rack
‑ Operating Temperature: ‑20 °C ~ +60 °C
‑ Storage Temperature：−40 °C ~ +70 °C
‑ Relative Humidity: 5‑95 %RH, non‑condensing
‑ Protection Class: IP20 (cabinet internal)
- G3FD main processor control board (HENF452692R1)
Complementary parts: UNITROL excitation rack and back‑plane, each auxiliary functional board, excitation commissioning software, matching firmware and generator parameter files.
‑ Power off the whole excitation rack before inserting or removing this main‑control board. Strictly use matching firmware version; mismatched firmware will lead to system abnormal operation or startup failure.
‑ For spare‑part replacement: Verify complete part number HENF452692R1. After replacement, confirm back‑plane bus identification, download corresponding firmware and generator parameter set, verify system startup, AVR regulation, protection logic and fault‑reporting function. Hardware revision mismatch will lead to system incompatibility risk.
‑ Module hardware fault will cause complete shutdown of whole excitation control system.
Thermal‑power and hydro‑power generator excitation cabinets; ABB UNITROL6000 generator excitation system; industrial spare‑part replacement for excitation core main‑processor computing unit.
- UNITROL6000 excitation system dedicated G3FD main processor board, undertakes AVR voltage‑regulation, excitation‑protection, limit‑logic, sequence‑control and internal‑bus scheduling, hardware variant HENF452692R1.
- Conformal‑coating processing, adapts to power‑plant high‑humidity and corrosive harsh site environment.
- High‑reliability processor and memory design, supports event‑recording and disturbance‑recording for post‑fault analysis.
- Comprehensive system‑level self‑diagnosis function, convenient for on‑site system‑fault location.
- Standard Eurocard rack‑mount plug‑in structure, convenient installation and on‑site maintenance.
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