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2021/11/09

What are the internal and external interferences of switch power supplies?

In general, a blown fuse indicates that there is a problem with the internal wiring of the power supply. Since the power supply operates under high voltage and large current conditions, fluctuations and surges in the grid voltage can cause a sudden increase in current within the power supply, leading to the fuse blowing. It is crucial to check the rectifier diodes at the power supply input, the high-voltage filtering electrolytic capacitors, and the inverter power switch transistors, to see if any of these components are shorted, open, or damaged.

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