Does The Safety Inspection Fail? Analysis And Rectification Of Common Electrical Safety Issues (voltage Resistance, Grounding, Insulation)

Unqualified safety testing is common in electrical safety projects such as voltage resistance, grounding, and insulation. The occurrence of these problems not only affects the market access of products, but may also bring safety hazards. The following is a specific analysis and rectification suggestions.

Unqualified withstand voltage testing is usually manifested as product breakdown or leakage current exceeding the standard under high voltage. Possible reasons include improper selection of insulation materials, insufficient insulation layer thickness, or manufacturing defects such as failure to meet standard requirements for creepage distance and electrical clearance. Rectification measures include selecting insulation materials with higher withstand voltage levels, increasing insulation thickness in key areas, optimizing circuit board layout to ensure creepage distance and electrical clearance meet safety requirements, and redesigning isolation structures in high-voltage areas if necessary.
Unqualified grounding testing is commonly caused by excessive grounding resistance or poor grounding continuity, which may lead to ineffective current flow into the ground when equipment leaks, increasing the risk of electric shock. Possible reasons include insufficient cross-sectional area of grounding wires, loose or oxidized grounding connection points. Remedial measures include using grounding wires that meet the cross-sectional area requirements to ensure that all grounding connections are firm and reliable. Regularly check the contact status of grounding terminals, and if necessary, increase grounding auxiliary connection points. For metal shell equipment, it is necessary to ensure reliable conductivity between the shell and the internal grounding system.
Unqualified insulation testing may be caused by aging, damage, or moisture of insulation materials, or by environmental factors such as high temperature and humidity not being considered during design, resulting in a decrease in insulation performance. Rectification measures include replacing aging or damaged insulation components, improving product sealing design to prevent moisture intrusion. For equipment with harsh working environments, high-temperature and high humidity resistant insulation materials should be selected, and insulation performance testing before leaving the factory should be strengthened to ensure that safety requirements can still be met under extreme conditions.
The comprehensive rectification suggestions include strictly following safety standards in the design phase for risk assessment, strengthening key process control in the production process, such as the reliability of welding grounding terminals, the handling of insulation materials, and the verification and testing of voltage resistant structures. All possible failure modes should be covered in the testing process, and the root cause of non-conforming batches should be traced and analyzed to improve the overall electrical safety of the product through continuous improvement.