Technical Specifications Processes generator voltage and current feedback signals. Outputs trigger pulse signal for power thyristor unit. Nominal working power supply 24 V DC, allowable range 19.2‑30 V DC. Typical power consumption 6.4 W. Operating temperature ‑25 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Protection class IP20 inside cabinet. Certifications include CE and UL compliance.
Functional Features Acquires generator terminal voltage and current sampling signal. Executes excitation regulation algorithm and generates thyristor trigger pulse. Realizes hardware over‑voltage and over‑current protection logic. Provides board‑level self‑diagnosis function. LED indicators reflect power, running status and fault alarm. Communicates with upper‑level excitation controller via internal bus.
Application Scenarios Installed in generator excitation cabinet of thermal power plant, hydropower station and distributed power generation station. Serves as core signal processing board for synchronous generator excitation regulation system. Cooperates with power rectifier unit to realize generator voltage closed‑loop adjustment. Applies to large‑capacity generator set automation projects.
Performance Parameters Regulation signal processing response time is less than 12 ms. Trigger pulse output maintains high phase‑angle accuracy. Board fault status can be uploaded to excitation system HMI for alarm display. Signal input channel realizes effective surge suppression.
Installation Requirements Insert circuit board into corresponding slot of excitation rack and tighten front‑panel fixing screws. Connect rack power supply strictly following polarity marking. Complete back‑plane signal connection inside rack. Keep ventilation clearance around board for heat dissipation. Complete parameter configuration via excitation system engineering tool. Cabinet protective grounding must follow ABB excitation system grounding specification.
Usage Notes Wear anti‑static wrist strap before touching exposed circuit components. Check LED indicator state after power‑on. High‑voltage exists in excitation cabinet, strictly follow high‑voltage safety operation procedure. Avoid mechanical impact and violent vibration during transportation and maintenance.
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