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The technical requirements of the North American LED energy saving lamp detection

2016-05-20 11:31:51
 
        First, the LED North American standards the status quo
 
  LED lamps as a new product, currently existing North American product safety standards is no specific technical requirements for such products, the test LED products become an issue in the industry. American UL laboratory for the current industry conditions, is organizing the preparation of LED energy-saving lamps safety certification standards UL8750, this standard is still draft, has not been officially adopted as the certification standards. Thus, certification testing issues LED energy-saving lamps, temporarily not been completely resolved.
 
  The basic principle of LED energy saving lamp is the AC power conversion by switching DC power supply module, power supply to the light emitting diode to work. According to the basic principle and structure characteristics of energy-saving LED lights, the United States proposed transitional MET laboratory testing scheme at this stage: the traditional energy-saving lamps US certification standards UL1993 (corresponding to Canadian standard CAN / CSA-C22.2No.0, CAN / CSA-C22.2No.74), and a power module standard UL1310 or UL1012 (corresponding to Canadian standard CAN / CSA-C22.2No.107) LED energy-saving lamps for testing and certification.
 
  Second, detection techniques
 
  Hereinafter, according to UL1993, UL1310 and UL1012 standards, LED energy-saving lamps certification testing of the key issues, do some elaborate.
 
  1. material
 
  LED lamps can be made into various shapes, with energy-saving fluorescent tube LED lamps, for example, its shape like an ordinary fluorescent tubes as fluorescent tube made of transparent polymer shell of the power module and the light emitting diode package inside. Transparent polymer shell fire and electric shock play functionality in the product. According to the standard requirements of energy-saving lamp shell material is required to achieve V-1 grade or more, the transparent polymer shell V-1 shall be above the level of materials used.
 
  The point to note is that the product housing to achieve the desired V-1 grade, having a thickness greater than the thickness must be equal to the V-1 grade raw material required for fire rating and thickness requirements can be found on the UL yellow card of raw materials . Actual testing found that the manufacturer in order to ensure LED lamp brightness, often very thin transparent polymer shell, which requires test engineers taken to ensure that the material reaches a desired thickness fire rating. Due to the different materials of the same fire rating have different thickness requirements, certain raw materials at a smaller thickness to meet the higher fire rating requirements, it recommended that the manufacturer can choose suitable raw materials to make products shell.
 
  2. Drop Test
 
  By product standards, product drop to simulate actual use situations that may occur as a drop test, the product from the height of 0.91 meters high fell hardwood board products shell can not break even expose hazardous live parts inside. When manufacturers choose to make products shell material must be considered that the strength requirements.
 
  3. Dielectric strength
 
  Transparent shell surrounded by the power module inside the transparent shell material must meet the electric strength requirements. According to standards, based on conditions in North America between 120 volts, the internal high-voltage live parts and enclosure (covered with metal foil test), to be able to withstand the electric strength test AC 1240 volts. Under normal circumstances, the product shell thickness of about 0.8 mm, which can meet the electric strength test requirements.
 
  4. Power Module
 
  Power supply module is an important part of energy-saving LED lights, the power module switching power supply technology. Press the power module types, consider using different standards for testing and certification. If the power supply module is classII, which can be used to test UL1310 certification. classII power refers to the use of isolation transformer, the DC output voltage is below 60 volts, the current is less than 150 / Vmax amp power supply. While the non classII power, is used to test UL1012 certification. These two standards are very similar technical requirements, refer to each other. Most LED lights inside the power supply module is the use of non-isolated associated power supply with output DC voltage greater than 60 volts, and therefore does not apply UL1310 standards applicable UL1012
 
  5. Insulation requirements
 
  Because LED lamps internal space is limited, the structural design, pay attention to insulation requirements dangerous live parts and accessible metal parts between. Insulation can be spatial distance and creepage distances, it can be an insulating film. According to standards, between hazardous live parts and accessible metal parts to the spatial distance of 3.2 mm, the creepage distance is 6.4 mm. If the distance is not enough, you can add insulation sheet as additional insulation, the insulation thickness greater than 0.71 mm, if the thickness is less than 0.71 mm, the product will have to be able to bear 5000V high voltage test.
 
  6. Temperature test
 
  Temperature test is a must-do project product safety testing standards for different elements have certain temperature limits. In the product design phase, the manufacturer must pay great attention to heat the products in question, especially for some parts (such as insulating films and so on) should pay particular attention.
 
  Member if long-term work under high temperature conditions, easily damaged, resulting in a fire or electric shock hazard. Lamps internal power module is enclosed in a small space, heat dissipation is limited. Therefore, the manufacturer component selection, pay attention to select the appropriate size elements, ensure that the component at a certain margin work, thus avoiding the long-term component at near full load conditions arising from overheating.
 
  7. structure
 
  LED energy saving lamp power supply modules installed inside the housing, limited space, some manufacturers in order to save space, the pin-type element surface soldered on PCB, this approach is not acceptable. The surface of the welded pin-type element is likely to fall due to the Weld and other reasons, resulting in danger. Therefore, for these elements to be taken socket welding possible. If you had to take surface welding, we have this piece and glue the fixed components using other means to provide additional protection.
 
  8. Fault Test
 
  Failure of the product certification testing product testing is a crucial test project. This test project is shorted or open some elements of the line, in order to simulate actual use failure may occur, in order to assess the product under a single fault condition safety. To meet the safety requirements in product design, consider the product plus the appropriate input fuses to prevent output short circuit or over current internal component failure resulting in a fire hazard.
 
  Third, the factory inspection
 
  North American product certification for a factory inspection, factory inspection including the first factory inspection and follow-up inspections. If the plant is the first application in North America, product certification, will carry out the first factory inspection. The first factory inspection focused on quality assurance system of the plant, asked the factory has a sound quality assurance system to ensure product quality and ensure effective supervision. If the plant has established a quality management system according to ISO9000 standards, and adopted the ISO9000 certification, basically in line with the first factory inspection management system requirements. If the plant does not pass the ISO9000 certification, we will have in the procurement of raw materials, incoming inspection, inventory management, product design, engineering changes, production line testing, instrument calibration and other aspects of the complaint follow a clear program files, and effective implementation. Follow-up inspection is aimed at checking the product structure and product testing and other aspects of the production line to ensure consistent product mix and sample certified production line, and through the relevant production line testing. After the product manufacturer through testing and certification, must strictly follow the structure and components were the list of certified sample production, any changes may involve product safety certification body must be notified for evaluation. If necessary, you may want to modify and re-test reports. Test reports in the test products on the production line is clearly required, the manufacturer must be related tests, such as high-pressure test, ground continuity testing as required.

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