Technical Specifications Pulse signal generation and power amplification circuit. Auxiliary power supply 24 V DC. Typical power consumption 6.7 W. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Board surface IP20. Complies with ABB excitation system assembly specification.
Functional Features Receives control instruction from excitation main control unit. Generates and amplifies trigger pulse signal. Drives thyristor power component of excitation rectifier bridge. Monitors pulse output loop state. Supports system fault signal feedback.
Application Scenarios Equipped in power plant generator excitation cabinet. Cooperates with main control board to complete generator excitation adjustment. Used for equipment maintenance and spare‑part replacement.
Performance Parameters Pulse amplitude and phase keep stable. Pulse driving capacity meets thyristor trigger requirement. Fault feedback signal responds rapidly. Long‑term continuous operation performance is reliable.
Material Composition Multilayer glass‑fiber epoxy printed circuit board. Pulse generation chip, power amplification components, isolation components. Metal fixing support. Multi‑pin plug‑in connectors and signal terminals.
Structural Characteristics Flat embedded circuit board structure. Equipped with multi‑pin internal connectors and external signal terminals. Overall dimension adapts to excitation cabinet internal installation space.
Working Principle After power‑on, board receives control phase instruction from excitation main control board. Internal circuit generates corresponding trigger pulse and completes power amplification. Pulse signal outputs to thyristor gate pole, controls rectifier bridge conduction angle, and realizes adjustment of generator excitation current.
Installation Requirements Fix circuit board in excitation cabinet designated installation position. Tighten fixing screws. Ensure each connector is fully inserted. Complete pulse output loop wiring according to system schematic drawing. Guarantee cabinet protective grounding. Carry out trigger function test after power‑on.
Usage Notes Disconnect excitation system total power supply before disassembly and assembly, wear anti‑static wrist strap. Keep away from high‑voltage live part. Periodically check connector and terminal tightening condition.
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