Description
‑ Power Supply: Powered by excitation rack back‑plane bus
‑ Power Consumption: approx 10.0 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 AC/DC signal conditioning circuit, high‑precision A/D conversion unit, surge‑suppression protection circuit, channel diagnosis logic, back‑plane bus controller, module self‑diagnosis circuit, conformal‑coating protection layer
‑ Communication Interface: Internal dedicated back‑plane bus for excitation main‑control board
‑ Galvanic Isolation: Galvanic isolation for all analog sampling channels, isolation rating 2500 VAC
‑ Sampling Signal Types: generator three‑phase voltage PT signal, generator stator current CT signal, excitation voltage, excitation current analog signal
‑ Conversion Performance: high‑precision ADC conversion, meets excitation regulation fast‑response requirement
‑ Protection: input over‑voltage surge suppression, channel over‑range monitoring
‑ Status LED Indicators: Power indicator, Module Fault indicator, sampling channel status LED
‑ Weight: approx 0.98 kg
‑ Collects multi‑group analog signals from field PT, CT and excitation loop; after isolation, filtering and conditioning, completes high‑precision A/D conversion, transmits digital sampling data to excitation main‑control board.
‑ Provides raw measurement data for AVR automatic voltage regulation, PSS power‑system stabilizer and all excitation limit‑protection functions, is the data source for generator excitation closed‑loop control.
‑ Channel‑level diagnosis: monitors signal loss, over‑range, channel short‑circuit and hardware circuit abnormality, reports fault information of each sampling channel to main‑control board.
‑ Module self‑diagnosis monitors rack power‑supply, internal circuit running state and back‑plane bus communication, uploads module‑level fault‑alarm information. Conformal‑coating improves long‑term reliability under harsh power‑plant environment.
‑ Cannot run independently; must be installed inside UNITROL excitation rack and cooperate with excitation main‑control board. HENF315129R1 is hardware revision variant of E3EB series; pin‑compatible within E3EB revision family, cannot directly interchange with other series excitation boards.
‑ Continuously monitors each analog 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; sampling measured values and fault codes are read via excitation commissioning tool or upper‑level HMI workstation.
‑ Module hardware failure or sampling channel fault will result in loss of measurement basis for AVR regulation and protection logic; may cause generator voltage out‑of‑control or excitation protection trip.
‑ Back‑plane connector: connects to excitation rack internal bus, transmits sampling measurement data and diagnostic status to main‑control board.
‑ Analog signal terminal block: wiring terminals for PT voltage, CT current and excitation‑loop analog signal 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)
- E3EB analog sampling board (HENF315129R1)
Complementary parts: UNITROL excitation rack and back‑plane, excitation main‑control board, PT‑CT measuring device, shielded analog signal cables, excitation commissioning software.
‑ Power off the whole excitation rack before inserting or removing this board. Analog sampling wiring must adopt shielded cable with single‑end shield grounding; strictly distinguish voltage loop and current loop wiring, avoid open‑circuit CT secondary causing high‑voltage hazard and board burnout.
‑ For spare‑part replacement: Verify complete part number HENF315129R1. After replacement, confirm back‑plane bus identification, verify sampling precision, data transmission and channel fault‑reporting function. Hardware revision mismatch will lead to measurement deviation and abnormal excitation regulation.
‑ Module hardware fault will affect generator excitation measurement and control whole‑loop.
Thermal‑power and hydro‑power generator excitation cabinets; ABB UNITROL generator excitation system; industrial spare‑part replacement for excitation high‑precision analog signal sampling unit.
- UNITROL excitation system dedicated E3EB analog sampling board, provides high‑precision PT/CT and excitation‑loop measurement data for AVR regulation and protection logic, hardware variant HENF315129R1.
- Conformal‑coating processing, adapts to power‑plant high‑humidity and corrosive harsh site environment.
- Every analog sampling channel adopts galvanic isolation and surge‑suppression circuit, strong anti‑interference capability for strong electromagnetic‑interference scene.
- Independent channel‑by‑channel fault diagnosis function, convenient for field analog‑loop fault location.
- High‑speed and high‑precision ADC conversion, satisfies fast dynamic‑response requirement of generator excitation control.
- Standard Eurocard rack‑mount plug‑in structure, convenient installation and on‑site maintenance.
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