What are the requirements of the safety standards for power adapters?

Safety standards are to protect the user's life and property safety as a starting point, the power adapter, electronic and electrical products in the insulation of raw materials, flame retardant and other aspects of the strict regulations. Products that meet safety specifications not only require the product itself to meet safety standards, but also require manufacturers to have a sound safety production, quality assurance system. International standards such as IEC 62368/IEC 61558 and many other safety standards. The safety certification mainly includes four requirements: creepage distance, resistance, leakage current and temperature

Resistance to Electricity: It means that when the zero voltage is increased to 1500V AC or 2200V DC between the AC input line or between the AC input and the chassis, there is no breakdown or arcing.

Temperature: safety standards for electronic and electrical appliances is very strict, and requires materials with flame retardant, switching power supply internal temperature rise should not exceed 65 ℃.

Leakage current: through the isolation transformer in the power supply of the fire or zero line and easy to touch the metal between the series of ammeter, switching power supply leakage current in the 260V AC input should not exceed 3.5mA.

Creepage distance: refers to the measured along the insulating surface between two conductive parts or conductive parts and equipment interface between the shortest distance, emphasizing the creepage distance is to prevent the device or the device and the ground between the fire threat to personal safety.

　Safety certified products in the components, materials, insulation, flame retardant and other aspects of the strict regulations. Due to the longer application time for safety certification, there are strict restrictions and requirements, such as China's CCC certification, not only to send the product itself to meet the CCC standards, but also requires the factory to be relatively perfect (similar to ISO9000 audit) quality assurance system to ensure that mass production, each product city in line with the requirements of the CCC; not only that, but also to accept the CCC organization regular and irregular quality supervision and inspection. Not only that, but also accept the CCC organization's regular and irregular quality supervision and inspection.

For this reason, when applying for safety certification, manufacturers will consider the perfection and practicality of the product itself. Because no changes, substitutions or modifications can be made after the application for safety certification, the starting point for safety-compliant products is relatively higher than that for non-safety-compliant products. Non-safety power supply, in the accumulation of dust, moisture, high temperature, lightning, vibration, etc., easy to short-circuit phenomenon, once a short-circuit, non-safety power supply is very easy to cause a fire, a serious impact on the user's life and property safety, so the world's countries on the implementation of the safety standards is very strict.

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