ABB PCD231B101 3BHE025541R0101 Excitation Control Measurement Board

Auxiliary supply: 24 V DC, supporting 9‑36 V DC wide‑range input

Power consumption: ≤24 W

Sampling performance: 16‑bit high‑speed ADC, high‑synchronization sampling for generator voltage and current signals

Binary I/O: multi‑channel digital input and output for cabinet status acquisition and alarm/trip output

Analog interfaces: multiple analog measuring channels for generator terminal voltage, generator current, rotor excitation loop signal and cabinet temperature signal

Communication interfaces: back‑plane internal bus for AC800PEC rack, Ethernet interface, PROFIBUS‑DP interface

Mounting mode: rack plug‑in module 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 1.5 kg

Certifications: CE approval

High‑precision synchronous sampling of generator voltage, current and excitation loop related analog quantities, provide measurement foundation for AVR automatic voltage regulation.

Complete automatic voltage regulation, reactive power adjustment and various excitation limit algorithm calculation.

Output trigger pulse signals to control thyristor rectifier bridge, realize excitation current adjustment.

Built‑in excitation related fault monitoring: rotor over‑current, over‑excitation, under‑excitation, V/Hz limitation and other protection logic.

Collect cabinet binary status signals, output fault alarm and trip contact signals.

Realize data interaction with DCS and upper monitoring system through multiple communication interfaces.

Realize disturbance recording, sequence‑of‑event logging and fault data storage.

Hardware self‑diagnosis function detects internal circuit faults and outputs alarm information.

Parameter configuration and project debugging are completed by UNITROL Configurator and Control Builder M engineering software.

Plug‑in installation in AC800PEC rack of excitation cabinet. High‑power cables and weak‑signal sampling cables shall be laid separately, ensure cabinet grounding is reliable. Auxiliary 24 V DC power supply must be within rated working range. After board replacement, confirm hardware version matches original project, download complete excitation configuration file. Carry out closed‑loop simulation test, pulse trigger inspection, analog channel calibration, binary I/O point‑to‑point test and DCS communication verification. This board needs to match other related boards of excitation system, cannot be used alone. Confirm no hardware self‑diagnosis fault alarm before putting into operation.

Core control‑measurement board for UNITROL6000 series static excitation system 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.