source:power adapter Popular:adapter release time:2021-11-01 10:43:10 Article author:sznbone
The safety standard is based on the protection of the life and property safety of users, and has made strict regulations on the insulation of raw materials and flame retardancy of power adapters and electronic and electrical products. Products that meet safety specifications not only require the products themselves to meet safety standards, but also Manufacturers are also required to have a complete safety production and quality assurance system. International standards include many safety standards such as IEC 62368/IEC 61558. Safety certification mainly includes requirements for creepage distance, electrical strength, leakage current and temperature.
Dielectric strength: 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, it will not break down or draw an arc.
Temperature: Safety standards have strict requirements on electronic appliances, and require materials to be flame-retardant. The internal temperature rise of the switching power supply should not exceed 65°C.
Leakage current: An ammeter is connected in series between the live wire or neutral wire of the power supply and the accessible metal through an isolation transformer. The leakage current of the switching power supply should not exceed 3.5mA under 260V AC input.
Creepage distance: refers to the shortest distance between two conductive parts or the interface between a conductive part and the equipment measured along the insulating surface. It is emphasized that the creepage distance is to prevent fire between devices or between devices and the ground and threaten personal safety.
Safety-certified products have strict regulations on components, material insulation, flame retardancy, etc. Due to the long application time for safety certification, there are strict restrictions and requirements, like China's CCC certification, not only products are sent for inspection It must comply with the CCC standard, and at the same time require the factory to have a relatively complete (similar to ISO9000 audit) quality assurance system to ensure that each product city meets the requirements of CCC during mass production; not only that, but also accept CCC institutions on a regular and irregular basis Quality supervision and inspection.
For this reason, when applying for safety certification, manufacturers will consider the completeness and practicality of the product itself. Because after the safety certification application, any changes, substitutions or modifications are not allowed, so relatively speaking, the starting point of safety products will be higher. Non-safety products are much higher. Non-safety power supplies are prone to short circuits under conditions such as dust, humidity, high temperature, lightning, and vibration. Once a short circuit occurs, non-safety power supplies can easily cause fires and seriously affect users. Life and property are safe, so all countries in the world have implemented very strict safety standards.
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