About The Detection Of Led Tube In North America

First :The status of Led tube standard in North America )

 LED tube as a new energy saving lamp products ,now ,it is very poluare in North Amrica and there is no speical standard for this products now .The detection of Led tube products has changed a project for all of the led industry now .Since saw this condition The UL laboratory in US is organizing some experts to write the UL8570 standard for the Led tube products .This standard now is only a draft and is not adopted as a certificate standard .So The problem of the Led tube detection is not solved now .
 The retionale of the Led tube is use the switching power supply mould to change the AC input toDC input so that it can offer the power to the Led ttube .Follow the retionale and featurs of the Led tube ,the US MET laboratory advised a new solution :Adopt the old standard UL1993 of traditional fluorescent lamp Traditional energy-saving lamps American certification standards UL1993 (corresponding Canadian Standards CAN/CSA-C22.2No.0, CAN/CSA-C22.2No.74), and power module standard UL1310 or UL1012 (corresponding Canadian Standards CAN/CSA-C22. 2No.107) of the LED tube testing and certification.

 Second : Detection Techniques
 Following on the basis of UL1993, UL1310 and UL1012 standards, energy-saving lamp LED tube certification testing of the key issues, do some elaborate.

 1, material
 Led tube Energy-saving lights, its shape, like with ordinary fluorescent tubes, fluorescent tube transparent polymer shell from the power supply module and the LED package inside. Transparent polymer casing products play in the fire and electric shock function. According to standards, energy saving lamp shell material is required to achieve V-1 grade or more, so transparent polymer shell to be used for more than V-1 grade material. It should be noted is the product shell to achieve the required level of V-1, its thickness must be greater than or equal to V-1 grade of raw materials required thickness, fire rating and the thickness of the raw materials required in UL yellow card check to.
 Found in the actual testing, the manufacturer in order to ensure the brightness of LED tube lights, often very thin transparent polymer shell, which would require attention to ensure that materials testing engineers to achieve the required thickness of fire protection rating. As different materials on the same level of fire safety requirements are different thickness, the thickness of certain raw materials in smaller, under the requirement to meet higher fire rating, may recommend that manufacturers can choose the right materials to do the unit housing.
 2, drop test

 By Led tube product standards, the product to simulate the actual use of the drop may occur during the drop test case for the product dropped from a height of 0.91 meters hardwood panel products can not break even cover the risk of exposed live parts inside. Manufacturers make products cover selection of materials, the need to consider the strength requirements
 3, electric strength
 Led tube surrounded by a transparent shell to the internal power supply module, transparent shell material must be required to achieve the electric strength. Standard requirements, based on the conditions of the North American voltage of 120 volts, the internal pressure between charged parts and case (foil covered on trial), to be able to withstand 1240 volts AC electric strength test. In general, shell thickness of 0.8 mm product is about, you can meet the electric strength test requirements.
 4, power supply module
 LED tube power module is an important component of energy-saving lamp, power supply module of switching power technology. Press the power module types, consider using a different testing and certification standards. If the power module is classII power, which can be used to test UL1310 certification. classII power is the use of isolation transformer, the output voltage below 60 volts DC, current is less than 150/Vmax power amp.
 The non-classII power, then used to test UL1012 certification. Technical requirements of these two standards is very similar to cross-reference. LED tube light most internal power supply module is in conjunction with non-isolated power supply, power supply output voltage is also greater than 60 volts, it does not apply UL1310 standard, applicable to UL1012
 5, insulation requirements
 As the energy-saving lamp LED interior space is limited, the structural design, pay attention to dangerous live parts and metal parts can be touched between the insulation requirements. Insulation can be a distance and creepage distance, it can be insulating film. Standard requirements, hazardous live parts and metal parts can be touched distance between 3.2 mm to be achieved, creepage distances to reach 6.4 mm. If the distance is not enough, you can add insulation film as additional insulation, insulation thickness is greater than 0.71 mm, if the thickness is less than 0.71 mm, the product will have to be able to 5000V high voltage test bearing.
 6, temperature rise test
 Temperature rise test is a necessary product safety testing a project, the standard of the different components have a certain limit of temperature rise. In the product design phase, manufacturers should attach great importance to the heat dissipation problem, especially for certain components (such as insulating films, etc.) should pay particular attention.
 Components if long-term work in hot conditions, easily damaged, resulting in fire or electric shock. Lamp power supply module is enclosed within a small space, the heat is limited. Therefore, component manufacturers choose, pay attention to select the appropriate component specifications, to ensure a certain margin component to work, thus avoiding long-term component under conditions close to full load caused by hot work.
 7, the structure
 LED energy saving lamp power supply module is installed inside the shell, space is limited, and some manufacturers to save space, the pin-like device on the surface of solder in the PCB, this is not acceptable. The surface of the pin welding-type devices and other reasons it may be due to Weld off danger. Therefore, these components should be possible to jack welding. If forced to take the surface of welding, will have to add glue to this piece using the fixed component, etc. to provide additional security.
 8, fault test
 Product Certification testing failure test is a test project in the vital. This test is short-circuit or open line on the road a number of components, to simulate the actual process may occur in the failure to assess products in a single fault conditions of security. In order to meet the security requirements in product design, and to consider appropriate increases in product input end of the fuse to prevent the output short circuit or internal component failure occurred when the current is to cause fire danger.

 Third,:factory inspection
 North American product certification to inspect factories, factory inspection, including the first factory inspection and follow-up examination. If the plant is the first time for North American product certification, will have to be the first factory inspection. Check the first major plant quality assurance system for the plant, asked the factory has perfect quality assurance system to ensure product quality and ensure effective supervision. If the factory has been established in accordance with ISO9000 quality management system standard, and adopted the ISO9000 certification, is basically consistent with the first factory inspection of the management system requirements.
 If the plant is not passed ISO9000 certification, they have the raw material procurement, incoming inspection, inventory management, product design, engineering changes, production line testing, instrument calibration, and follow up such complaints have a clear program files, and effective implementation. Follow-up inspection is aimed at tracking the structure of product inspection and production line product testing, to ensure the production line samples of the product structure and certification agreement and through the relevant production line testing. The product by the manufacturer after testing and certification must be strictly in accordance with the certification approved sample list of the structure and components in production to any likely involves product safety must notify the certification body for evaluation. If necessary, you may want to re-test and report changes. Product test reports on the production line where there is a clear test requirements, manufacturers must follow the requirements of the relevant tests, such as high-pressure testing, ground continuity testing.