Description
‑ Power Supply: Powered by excitation rack back‑plane bus, 24 VDC auxiliary power
‑ Power Consumption: approx 8.2 W
‑ Mechanical Structure: Eurocard plug‑in board for UNITROL rack, metal front panel, back‑plane bus connector, multi‑channel analog signal terminal block
‑ On‑board Resources: multi‑channel synchronization voltage signal conditioning circuit, phase‑angle detection unit, synchronization threshold comparison logic, surge‑suppression protection unit, back‑plane bus controller, module self‑diagnosis circuit, conformal‑coating protection layer, optimized phase‑detect circuit for R2 revision
‑ Communication Interface: Internal dedicated back‑plane bus for excitation main‑control board
‑ Galvanic Isolation: Galvanic isolation for all synchronization analog input channels, isolation rating 2500 VAC
‑ Input Signal Types: generator terminal voltage signal, grid bus‑bar voltage signal for synchronization
‑ Core Function: voltage amplitude comparison, phase‑angle difference calculation, synchronization condition pre‑judgment for generator paralleling
‑ Protection: input surge‑suppression, signal over‑range monitoring
‑ Status LED Indicators: Power indicator, Module Fault indicator, input signal status LED, synchronization condition status LED
‑ Weight: approx 0.92 kg
‑ Collects generator terminal voltage and grid bus‑bar voltage analog signals; after isolation and filtering conditioning, completes amplitude comparison and phase‑angle difference calculation, sends synchronization measurement data to excitation main‑control board.
‑ Participates in generator paralleling logic judgment, provides pre‑check signal for closing breaker instruction, ensures generator connects to power grid under qualified synchronization condition, avoids impact caused by non‑synchronized closing.
‑ Supports SYNCHROTACT series synchronization function cooperation, provides high‑precision phase‑detection raw data for automatic paralleling control. R2 revision optimizes phase‑detection circuit, reduces measuring deviation caused by field electromagnetic interference.
‑ Module self‑diagnosis monitors synchronization sampling channels, hardware processing circuit, rack power‑supply and back‑plane bus communication; detects signal loss, channel abnormality and hardware fault, uploads module‑level fault‑alarm information to main‑control board. Conformal‑coating improves long‑term reliability under harsh power‑plant site condition.
‑ Cannot run independently; must be installed inside UNITROL excitation rack and cooperate with excitation main‑control board. HENF450268R2 is hardware revision variant of G3ENa series; pin‑compatible within G3ENa revision family, cannot directly interchange with other series excitation boards.
‑ Continuously monitors synchronization sampling‑channel status, module power‑supply and internal hardware health. Detected faults activate fault LED and send fault word to excitation main controller.
‑ No local numerical display; synchronization measuring value and fault codes are read via excitation commissioning tool or upper‑level HMI workstation.
‑ Module hardware failure will result in loss of synchronization signal‑processing function; excitation AVR voltage‑regulation still runs normally, but automatic paralleling function cannot work, generator grid‑connection operation can only be completed by manual mode.
‑ Back‑plane connector: connects to excitation rack internal bus, transmits synchronization measurement data and diagnostic status to main‑control board.
‑ Analog signal terminal block: wiring terminals for generator voltage and bus‑bar voltage synchronization shielded 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)
- G3ENa synchronization interface board (HENF450268R2)
Complementary parts: UNITROL excitation rack and back‑plane, excitation main‑control board, PT measuring device, shielded synchronization signal cables, excitation commissioning software.
‑ Power off the whole excitation rack before inserting or removing this board. Synchronization sampling wiring must adopt shielded cable with single‑end shield grounding; strictly distinguish synchronization voltage loop and other PT/CT sampling loops, avoid wrong wiring causing board burnout.
‑ For spare‑part replacement: Verify complete part number HENF450268R2. After replacement, confirm back‑plane bus identification, verify signal acquisition, phase‑angle measuring precision and fault‑reporting function. Hardware revision mismatch will lead to synchronization phase measuring deviation and bring paralleling impact risk.
‑ Module hardware fault will result in excitation‑system automatic synchronization function failure.
Thermal‑power and hydro‑power generator excitation cabinets; ABB UNITROL6000 generator excitation system; industrial spare‑part replacement for generator synchronization signal‑processing unit.
- UNITROL6000 excitation system dedicated G3ENa synchronization interface board, completes generator‑grid synchronization voltage sampling, phase‑angle calculation and paralleling‑condition pre‑judgment, hardware variant HENF450268R2.
- Conformal‑coating processing, adapts to power‑plant high‑humidity and corrosive harsh site environment. R2 revision optimizes phase‑detection circuit for stronger anti‑interference performance.
- Synchronization input channels adopt opto‑coupler galvanic isolation, resists strong electromagnetic interference in power‑plant cabinet.
- Channel‑level self‑diagnosis function, convenient for field synchronization‑signal‑loop fault location.
- Standard Eurocard rack‑mount plug‑in structure, convenient installation and on‑site maintenance.
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