Description
Auxiliary supply: 24 V DC, wide‑range 9‑36 V DC input, reverse‑polarity and surge‑voltage protection
Power consumption: ≤28 W
Real‑time control cycle: sub‑millisecond high‑speed calculation cycle, meet dynamic‑response requirements for generator excitation regulation
Sampling performance: 16‑bit high‑speed ADC, multi‑channel synchronous sampling for generator VT/CT signals
Binary I/O: onboard isolated digital input and relay output channels for cabinet status acquisition, alarm and trip‑signal output
Communication interfaces: AC800PEC rack back‑plane bus, multiple Ethernet ports, PROFIBUS‑DP interface; support Modbus TCP, TCP/UDP protocol
Mounting mode: whole‑machine plug‑in unit for excitation cabinet AC800PEC rack
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. 445 × 148 × 98 mm, weight about 1.6 kg
Certifications: CE approval
High‑precision synchronous sampling of generator terminal voltage, stator current and excitation‑loop analog‑quantities, provide measuring source for automatic‑voltage‑regulation closed‑loop control.
Complete AVR voltage‑regulation algorithm, reactive‑power / power‑factor control, parallel‑unit reactive‑power distribution calculation.
Full‑set excitation‑limit functions: over‑excitation limit, under‑excitation limit, stator‑current limit, V/Hz limitation, rotor over‑current supervision logic.
Output high‑speed trigger‑pulse signals to drive thyristor rectifier bridge, realize real‑time adjustment of excitation‑loop DC current.
Collect cabinet‑site binary‑status signals, output fault‑alarm and trip‑interlock signals.
Powerful disturbance‑recording, sequence‑of‑event logging and fault‑data storage function.
Multi‑group communication interfaces realize data interaction with plant DCS and upper‑monitoring system.
Hardware self‑diagnosis detects internal circuit and channel faults, report fault‑code to local HMI and DCS.
Configuration and commissioning are completed by UNITROL Configurator and Control Builder M engineering software.
Plug‑in whole‑machine installation inside AC800PEC rack of excitation cabinet. High‑power power‑cables and weak‑signal sampling‑cables shall be laid separately, ensure cabinet grounding reliable. Auxiliary 24 V DC power supply must keep within rated working range. After unit replacement, confirm hardware version matches original‑project configuration, download complete excitation‑project configuration file. Perform closed‑loop simulation test, pulse‑trigger‑output inspection, analog‑channel calibration, binary‑I/O point‑to‑point test and DCS‑communication verification. This unit must cooperate with matched power‑unit and auxiliary boards, cannot be arbitrarily replaced with other controller versions without software adaptation. Confirm no hardware self‑diagnosis fault‑alarm before putting‑into‑service.
Integrated core real‑time controller for UNITROL‑series static excitation‑systems of medium‑large synchronous‑generators in thermal‑power plants, hydropower plants and industrial self‑power‑stations, used for excitation‑cabinet maintenance and spare‑part replacement.
- AC800PEC‑platform integrated excitation‑specific real‑time controller, whole‑machine integrated design, compact rack‑plug‑in structure.
- Integrate high‑precision signal sampling, closed‑loop‑control‑calculation and power‑device pulse‑trigger‑output functions.
- Complete built‑in excitation‑regulation and excitation‑limit‑algorithm library, satisfy grid‑code requirements for generator‑excitation‑control.
- Rich industrial‑communication‑interfaces, convenient for docking with plant‑level‑automation‑system.
- Whole‑machine modular‑design, convenient for on‑site replacement and maintenance; hardware‑version matching shall be strictly noticed during spare‑part replacement.
- Key industrial spare‑part for ABB UNITROL excitation‑system maintenance and retrofitting.
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