Description
‑ Power Supply：AC/DC auxiliary input from excitation cabinet；output multi‑channel stabilized DC for internal boards；typical total power output 9.5 W
‑ Mechanical Structure：standard Eurocard plug‑in board, front‑panel locking handle；weight approx 0.82 kg
‑ On‑board Resources：rectifier circuit, switching power conversion unit, multi‑channel isolation output, over‑voltage / over‑current protection circuit, module self‑diagnosis circuit, conformal‑coating protection
‑ Communication Interface：internal back‑plane bus, supplies power to each functional board of excitation rack
‑ Galvanic Isolation：galvanic isolation between input power side and each output power channel, isolation rating 2500 VAC
‑ Core Function：auxiliary power conversion, multi‑channel isolated DC power supply for excitation rack internal modules, power‑fault monitoring
‑ Protection：input surge‑suppression, output over‑voltage, over‑current and short‑circuit protection
‑ Status LED Indicators：power input indicator, each output channel status LED, fault alarm LED
‑ Weight：approx 0.82 kg
‑ Receives auxiliary power from excitation cabinet, converts and outputs multiple groups of isolated stable DC power, supplies working power for O3EEb main‑processor, O3EC I/O board, trigger board and other plug‑in modules in the rack.
‑ Built‑in multi‑level protection: when output short‑circuit, over‑current or over‑voltage occurs, automatically limit or cut off corresponding channel output to avoid damaging downstream control boards.
‑ Monitors input power status and each output channel voltage in real‑time; when power‑supply abnormality is detected, sends fault signal to excitation main‑processor via back‑plane bus. Conformal‑coating treatment improves anti‑humidity and anti‑dust performance in cabinet environment.
‑ Cannot run independently; must be installed in UNITROL excitation Eurocard rack and cooperate with main‑processor, I/O and trigger boards. O3EGb HENF315118R2 is dedicated excitation power‑supply board, cannot be replaced by ordinary general‑purpose power modules.
‑ Continuously monitors input auxiliary power and each output‑channel voltage status. Fault will activate panel fault LED and report fault word to excitation main‑processor module.
‑ No local historical‑data storage; power‑supply status and fault information can be read through excitation commissioning tool.
‑ Module hardware failure or output channel loss will cause partial or complete power loss of excitation rack internal boards; serious fault will lead to whole excitation‑system shutdown and generator excitation trip.
‑ Back‑plane connector: inserts into UNITROL rack slot, distributes multi‑channel DC power to each functional board through rack back‑plane.
‑ Input power terminals: connect to cabinet auxiliary power source.
‑ Mounting：insert into UNITROL excitation cabinet standard Eurocard rack slot
‑ Operating Temperature：‑10 ℃ ~ +60 ℃
‑ Storage Temperature：‑40 ℃ ~ +70 ℃
‑ Relative Humidity：5‑95 %RH, non‑condensing
‑ Protection Class：IP20, cabinet‑internal installation.
- O3EGb excitation power‑supply module（HENF315118R2）
Complementary parts: UNITROL‑series excitation cabinet rack, O3EEb main‑processor module, O3EC I/O interface module, trigger board, cabinet auxiliary power supply.
‑ Cut off excitation cabinet auxiliary power before inserting or removing this module. Check input‑power wiring polarity and voltage range to prevent module burnout.
‑ For spare‑part replacement: verify full model O3EGb and part‑number HENF315118R2; after installation measure each group of output DC voltage, confirm all rack boards work normally. Hardware‑version mismatch will lead to abnormal power‑supply output and risk of damage to other control boards.
‑ Module fault will result in power‑supply failure for excitation rack internal functional modules.
Thermal‑power and hydro‑power generator static excitation cabinets; ABB UNITROL‑series old excitation‑system maintenance and spare‑part replacement; industrial spare‑part for excitation‑rack auxiliary power‑supply unit.
- UNITROL excitation dedicated O3EGb power‑supply module (HENF315118R2), provides multi‑channel isolated stabilized DC power for each functional board inside excitation rack.
- Multi‑level over‑voltage, over‑current and short‑circuit protection for each output channel, protects downstream control hardware.
- Power‑supply‑channel fault monitoring function, reports power‑abnormality alarm to main‑processor.
- Conformal‑coating circuit board, adapts to humid and dusty cabinet‑installation environment.
- Standard Eurocard plug‑in structure, convenient cabinet installation and spare‑part swapping.
- Legacy discontinued excitation spare‑part, only used for old‑generating‑unit maintenance and retrofit projects.
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