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Why is the shell of a switching power supply charged?

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.03.27
The electrification of the switch power supply casing may cause safety hazards, which may be caused by various factors. What is the reason that makes the power supply casing live? Perhaps it is a grounding issue, an internal circuit malfunction, or an insulation fault. This situation may cause the power supply casing to carry charges, increasing the risk of electric shock.



Grounding issues:

If the shell of the switching power supply is not properly grounded, it may cause the shell to carry charges. Increase the risk of electric shock. Users may experience electric shock when in contact with the device, especially in high humidity environments. Under normal circumstances, the casing of the equipment should be connected to ground through grounding to ensure safe current flow to ground.

Internal fault:

The internal circuit components of the power supply have malfunctioned, which may cause the casing to carry electricity. This may include internal short circuits or leakage issues within the power supply.

Insulation fault:

The insulation between the switch power supply casing and the internal circuit may malfunction, causing the casing to become live. This may be caused by aging, damage, or manufacturing defects.

Design defects:

Sometimes, there may be defects in the design of the power supply, resulting in abnormal casing voltage. This may require the intervention of manufacturers to resolve.

In practical use, the electrification of the casing may directly affect the safety of the user. By deeply understanding the root cause of the problem, we can better take corresponding measures to ensure the normal use of the equipment.
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