Description
‑ Power Supply: external cabinet auxiliary input power
‑ Power Consumption: approx 14.5 W
‑ Mechanical Structure: Eurocard plug‑in board for UNITROL rack, metal front panel, back‑plane bus connector, power input terminal block
‑ On‑board Resources: DC‑DC conversion circuit, multi‑rail stabilized power output unit, over‑voltage / over‑current / over‑temperature protection unit, power‑quality monitoring circuit, back‑plane bus interface, module self‑diagnosis circuit, conformal‑coating protection layer
‑ Communication Interface: Internal dedicated back‑plane bus for excitation main‑control board
‑ Galvanic Isolation: Galvanic isolation between input power and internal logic power, isolation rating 2500 VAC
‑ Output capability: supplies multi‑group stable DC power for each functional board inside excitation rack
‑ Protection: input surge suppression, output short‑circuit protection, over‑temperature shutdown protection
‑ Status LED Indicators: Power indicator, Module Fault indicator, each power‑rail status LED
‑ Weight: approx 1.05 kg
‑ Receives cabinet auxiliary power input, completes isolation conversion and voltage stabilization, outputs multiple groups of stable DC power for excitation main‑control board, sampling board, communication board, I/O interface boards and other plug‑in modules.
‑ Built‑in comprehensive protection mechanism: detects input surge, output short‑circuit, over‑load and over‑temperature condition; performs protective shutdown when abnormality occurs to avoid cascading damage to other boards.
‑ Real‑time monitors each output power‑rail voltage quality; detects power‑supply deviation and circuit abnormality.
‑ Module self‑diagnosis monitors input power condition, conversion circuit health and back‑plane bus communication, uploads module‑level fault‑alarm information to excitation main‑control board. Conformal‑coating improves long‑term reliability under power‑plant harsh operating condition.
‑ Cannot run independently; must cooperate with each functional board inside UNITROL excitation rack. HENF315754R1 is hardware revision variant of G3EA series; pin‑compatible within G3EA revision family, cannot directly interchange with other series excitation boards.
‑ Continuously monitors input power, each output power‑rail status and module internal hardware health. Detected faults activate fault LED and send fault word to excitation main controller.
‑ No local numerical display; power‑supply operating status and fault codes are read via excitation commissioning tool or upper‑level HMI workstation.
‑ Module hardware failure will cause loss or disorder of internal rack power supply; all excitation function boards will stop working, generator excitation regulation will be out‑of‑service and excitation trip will occur.
‑ Back‑plane connector: connects to excitation rack internal bus, transmits power‑supply status and fault diagnostic information to main‑control board.
‑ Power‑input terminal block: wiring terminals for cabinet auxiliary power input cables.
‑ 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)
- G3EA auxiliary power‑supply board (HENF315754R1)
Complementary parts: UNITROL excitation rack and back‑plane, each excitation functional board, auxiliary power supply cabinet, excitation commissioning software.
‑ Power off the whole excitation rack before inserting or removing this power‑supply board. Auxiliary power input wiring must strictly follow cabinet specification; avoid wrong voltage input causing board burnout and damage to other modules.
‑ For spare‑part replacement: Verify complete part number HENF315754R1. After replacement, confirm back‑plane bus identification, verify multi‑rail power‑output stability and fault‑reporting function. Hardware revision mismatch will lead to abnormal power supply of whole rack.
‑ Module hardware fault will cause total power‑supply failure of excitation rack internal functional boards.
Thermal‑power and hydro‑power generator excitation cabinets; ABB UNITROL generator excitation system; industrial spare‑part replacement for excitation rack auxiliary power‑supply unit.
- UNITROL excitation system dedicated G3EA auxiliary power‑supply board, provides multi‑rail isolated stabilized DC power for all internal functional plug‑in boards, hardware variant HENF315754R1.
- Conformal‑coating processing, adapts to power‑plant high‑humidity and corrosive harsh site environment.
- Multiple‑level surge, short‑circuit and over‑temperature protection, effectively prevents fault cascading damage to other boards.
- Real‑time monitoring for each power‑rail plus self‑diagnosis function, convenient for on‑site power‑supply‑loop fault location.
- Standard Eurocard rack‑mount plug‑in structure, convenient installation and on‑site maintenance.
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