LED energy-saving lamp detection technology
LED energy-saving lamps are a new type of product, and the current product safety standards do not have specific technical requirements for this type of product. The testing of LED products has become a topic in the industry. The American UL laboratory is organizing the preparation of the LED energy-saving lamp safety certification standard UL8750 in response to the current state of the industry. This standard is currently still a draft and has not been officially adopted as a certification standard. Therefore, the certification test problem of LED energy-saving lamps has not been completely resolved for the time being.
The basic principle of LED energy-saving lamps is to use href=switch-type power supply module to convert AC power to direct current to supply power to light-emitting diodes. According to the basic principles and structural characteristics of LED energy-saving lamps, the American MET laboratory proposes a transitional testing program at this stage: adopting the traditional energy-saving lamps American certification standard UL1993 (corresponding to the standard CAN/CSA-C22.2No.0, CAN/CSA -C22.2No.74), and the power module standard UL1310 or UL1012 (corresponding to the standard CAN/CSA-C22.2No.107) for testing and certification of LED energy-saving lamps.
2. Technical points in testing
The following is a description of the key issues in the certification test of LED energy-saving lamps according to UL1993, UL1310 and UL1012 standards.
1. Material
It should be noted that the product shell must reach the required V-1 level, and its thickness must be greater than or equal to the thickness required by the V-1 level of the raw material. The fire rating and thickness requirements can be found on the UL yellow card of the raw material. . In actual testing, it is found that manufacturers often make transparent polymer shells very thin for the brightness of LED lights. This requires testing engineers to pay attention to the thickness of the material to achieve the required fire rating. Since different raw materials have different thickness requirements for the same fire rating, some raw materials can meet higher fire rating requirements with a smaller thickness, and manufacturers can choose appropriate raw materials for product shells.
LED energy-saving lamps can be made into various shapes. Take the fluorescent tube type LED energy-saving lamp as an example. Its appearance is the same as an ordinary fluorescent tube. The power module and light-emitting diodes are enclosed by a fluorescent tube transparent polymer shell. The transparent polymer shell plays the role of fire prevention and electric shock prevention in the product. According to the standard requirements, the energy-saving lamp housing material must be above V-1 level, so the transparent polymer housing must be made of materials above V-1 level.
2. Drop test
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According to the requirements of the product standard, the product should simulate the drop test that may occur during actual use. The product should be dropped from a height of 0.91 meters onto a hardwood board. The shell of the product should not be broken to expose the live parts inside. Manufacturers must consider this strength requirement when selecting materials for product shells.
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