• Categories:Industry news
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• Time of issue:2022-07-26 16:22
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(Summary description)Consumers can't help asking, what is the meaning of open flames? An open flame will appear during the normal use of the socket. For example, when plugging and unplugging, when switching on and off the socket, there will be open flames, that is, the phenomenon of sparking, which is called arc flash in professional. After the socket is aging, especially in some abnormal conditions, open flames may also appear, such as instantaneous short circuits, breakdown after the insulation resistance is reduced, and virtual connections of contacts, etc., which will cause ignition, and open flames or arc flashes. This is also one of the main reasons for fires in electrical appliances (rather than arson-like behaviors that are ignited with a lighter). Therefore, from the design and production of products, from the formulation of national standards, taking into account the occurrence of the above-mentioned situations, the materials of different parts of the product must meet the corresponding requirements. It can withstand the above-mentioned open flame, that is, arc flash, instead of flashing, to ensure the normal and expected use of the socket. This is the reason why the plastic materials that are in direct contact with conductive parts required by the standard have higher flame retardant properties than plastic materials for socket housings, because plastic materials in contact with conductive parts have to withstand frequent and more direct fires and sparks. Flash arc. Although the shell is also required to be flame-retardant, its flame-retardant level is lower than that of materials that directly contact with conductive parts. Instead of using a lighter to point, as ordinary consumers imagine, it actually first touches the shell, which requires the shell to have a higher tolerance. From this perspective, materials and products that can withstand ignition and arc flash should be better materials and products. In order to accurately determine the flame retardant level that the material can achieve, the corresponding Chinese national standard GB/T5169 and the American UL94 standard have specified specific and clear test methods. As long as it meets this type of standard test, it can meet the expected use. And consumers do not have to risk burns and fires to carry out non-realistic tests. In summary, whether in terms of the daily use environment of the socket, or in terms of the formulation and testing of national standards, a socket that does not burn when exposed to an open flame is reasonable and reasonable. Materials and products that can withstand ignition and arc flashing should be better materials and products.