Technical Specifications Multi‑channel pulse signal input and isolated pulse drive output. Auxiliary power supplied by excitation rack, typical power consumption 7.8 W. Operating temperature ‑10 ℃ to +55 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Conformal coated circuit board, isolation voltage 2500 V AC between input and output sides.
Functional Features Receives pulse control command from main regulator board. Amplifies and isolates trigger pulse signal. Outputs drive pulse for thyristor power components. On‑board LED indicates pulse channel working status. Built‑in hardware self‑diagnosis function for pulse circuit. Conformal coating improves moisture‑proof and dust‑proof performance.
Application Scenarios Key spare‑part for generator excitation system in power plant and industrial power station. Used for equipment overhaul and spare‑part replacement.
Performance Parameters Pulse output timing strictly meets thyristor trigger requirement. High‑voltage isolation separates control side and power side circuits. Self‑diagnosis can detect pulse channel loss and circuit abnormality.
Material Composition Multilayer glass‑fiber epoxy printed circuit board. Pulse signal processing chip, high‑voltage isolation and power amplification assemblies. Conformal protective coating. Multi‑pin back‑plane plug‑in connectors. Screw‑type pulse output terminals.
Structural Characteristics Standard plug‑in circuit board matching excitation cabinet slot. Board edge equipped with back‑plane connector and pulse output signal terminals. Reserved mechanical fixing holes. Weight approximately 0.68 kilogram.
Working Principle After power‑on, the board completes hardware self‑check. It receives trigger pulse instruction from main regulator board via back‑plane connector. Signals go through amplification and high‑voltage isolation processing, then output trigger pulse to thyristor power unit. Diagnosis circuit monitors each pulse channel running state continuously.
Installation Requirements Completely cut off excitation cabinet main power and control power before replacement. Insert UFC921A101 board into designated slot and tighten fixing screws. Ensure connectors are fully locked. Restore power supply and complete pulse trigger function test of excitation system.
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