Description
Auxiliary supply: 24 V DC, wide‑range 9‑36 V DC, reverse‑polarity and surge protection
Power consumption: ≤25 W
Sampling performance: 16‑bit high‑speed ADC, sampling rate up to 10 kHz, measurement accuracy ±0.1%FS
Binary I/O: multi‑channel digital input and output for status acquisition and alarm output
Analog interfaces: multi‑channel analog measuring channels for generator voltage, current, temperature and water‑cooling signal collection
Communication interfaces: Multi‑port Ethernet, RS485, PROFIBUS‑DP; support Modbus TCP / RTU, internal back‑plane bus for AC800PEC rack
Mounting mode: Rack plug‑in unit for excitation cabinet
Operating temperature: −10 ℃ ~ +70 ℃
Storage temperature: −40 ℃ ~ +85 ℃
Humidity: 5‑95 %RH non‑condensing
EMC compliance: IEC 61000‑4 series industrial electromagnetic compatibility standards
Dimension & weight: approx. 373 × 73.5 × 142 mm, weight about 1.53 kg
Certifications: CE approval
High‑precision synchronous sampling for generator terminal voltage, excitation current, power‑device temperature and water‑cooling parameters, provide measuring source for AVR automatic voltage regulation and reactive‑power closed‑loop control.
Generate high‑speed optical‑fiber gate drive pulses to control IGCT power unit, realize smooth adjustment of excitation DC current.
Complete excitation‑system hardware protection logic: over‑excitation, under‑excitation, rotor over‑current, IGCT over‑current, power‑unit over‑temperature, water‑cooling flow fault monitoring and protection action output.
Process local cabinet binary status signals, output fault‑alarm and trip signals.
Realize data interaction between excitation system and plant DCS / monitoring system via multiple communication protocols.
Internal fault recording, disturbance‑data storage and sequence‑of‑event logging function.
Hardware self‑diagnosis detects circuit fault inside module and outputs alarm indication.
Configuration and commissioning are completed by UNITROL Configurator and Control Builder M engineering software.
Plug‑in installation inside AC800PEC rack of excitation cabinet. Strictly separate high‑power power‑cables and weak‑signal measuring wiring, ensure reliable cabinet grounding. Auxiliary 24 V DC power supply shall keep within rated range. After module replacement, confirm hardware version matches original project configuration, download complete excitation configuration file. Complete closed‑loop simulation test, pulse‑output inspection, analog‑channel calibration, binary‑I/O point‑to‑point test and communication verification with DCS. This module must match corresponding drive board and power‑device, cannot be replaced arbitrarily without matching setting. Confirm no self‑diagnosis fault alarms before commissioning.
Core control‑measurement board for UNITROL6000/6800 high‑power static excitation system of large‑and‑medium‑size synchronous generators in thermal‑power plants, hydropower plants and nuclear‑power plants, used for on‑site maintenance and spare‑part replacement of excitation cabinets.
- Dual‑processor hardware architecture, separate floating‑point calculation and high‑speed logic processing, satisfy high real‑time requirement of large‑unit excitation regulation.
- Integrate high‑precision synchronous sampling and IGCT optical‑fiber pulse driving function, form complete closed‑loop control link with power unit.
- Built‑in complete hardware protection logic for excitation‑system fault conditions.
- Rich multi‑group communication interfaces, convenient for docking with plant‑level automation system.
- Rack‑plug‑in structure, convenient for on‑site maintenance replacement; pay attention to matching with drive board and power‑device during replacement.
- Industrial spare‑part for maintenance and retrofitting of ABB UNITROL6000 / 6800 excitation systems.
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