First, the status of LED North American standards
LED energy-saving lamps as a new product, the current North American product safety standards are not specifically for the technical requirements of such products, LED product testing has become a subject of the industry. US UL laboratory for the current situation in this industry, is organizing the preparation of LED energy-saving lamp safety certification standards UL8750, this standard is still draft, not formally adopted as a certification standard. Therefore, the LED energy-saving lamp certification test problem, has not been completely resolved.
The basic principle of LED energy-saving lamps is through the switch-type power supply module will be AC power conversion DC to power supply to the light-emitting diode work. According to the basic principles and structural characteristics of LED energy-saving lamps, the United States MET laboratory proposed a transitional testing program at this stage: the use of traditional energy-saving lamps US certification standards UL1993 (corresponding to the Canadian standard CAN / CSA-C22.2No.0, CAN / CSA-C22.2No.74), and the power module standard UL1310 or UL1012 (corresponding to the Canadian standard CAN / CSA-C22.2No.107) on the LED energy-saving lamps for testing and certification.
Second, the detection of technical points
The following based on UL1993, UL1310 and UL1012 standards, LED energy-saving lamp certification test key issues, do some elaboration.
LED energy-saving lamps can be made into a variety of shapes to fluorescent lamp-type LED energy-saving lamps, for example, its shape with the ordinary fluorescent tube, fluorescent tube from the tubular transparent polymer case and light-emitting diode package in the inside. Transparent polymer housing in the product to play a fire and anti-electric shock function. According to the standard requirements, energy-saving lamp shell material to be more than V-1 level, so transparent polymer shell to be used V-1 grade above the material.
It should be noted that the product shell to achieve the required V-1 level, the thickness must be greater than or equal to the required thickness of the raw material V-1 level, fire rating and thickness requirements can be found in the raw material UL yellow card The The actual test found that manufacturers in order to ensure the brightness of LED lights, transparent polymer shell is often made very thin, which requires engineers to ensure that the material to ensure that the material required to achieve the level of fire protection thickness. Because different raw materials have different thickness requirements for the same fire rating, some raw materials can meet higher fire rating requirements at smaller thicknesses. Manufacturers can choose the right raw material to make the product shell.
2. Drop test
According to the product standard requirements, the product to simulate the actual use of the process may occur in the fall of the situation for the drop test, the product from 0.91 meters high to the hard board, the product shell can not be broken and exposed to the internal dangerous parts. When the manufacturer chooses the material to make the product shell, it must consider this strength requirement.
3. Electrical strength
The transparent housing encloses the power module inside, and the transparent housing material must meet the electrical strength requirements. According to the standard requirements, based on the North American voltage of 120 volts, the internal high-voltage live parts and the shell (covered with metal foil test), to withstand AC 1240 volts of electrical strength test. Under normal circumstances, the product shell thickness of 0.8 mm or so, you can meet the requirements of the electrical strength test.