Nedap 9552456 9552456 power supply

Nedap 9552456 is a high‑voltage ballast power supply designed for HOK 25/100 lamp systems, accepting 220–277 VAC at 50–60 Hz and delivering up to 450 VDC @ 7 A with an ignition output of 600–975 VRMS. Common failure modes in this class include transformer winding insulation breakdown, capacitor electrolyte leakage or degradation, and rectifier diode burnout due to over‑voltage spikes. First‑check diagnostics: verify incoming mains voltage and polarity, measure output DC rail under no‑load and load conditions for continuity and correct voltage; inspect the internal capacitors for bulging or leakage, and test the bridge rectifier diodes with a multimeter for shorts.[oss-gpt-20b]

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