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Eight main points of testing standard for LED energy-saving lamp
1. The material LED energy saving lamp can be made into various shapes such as spherical straight tube type. Take the straight tube type LED fluorescent lamp as an example, its shape is the same as the ordinary fluorescent lamp tube, the power module and light-emitting diode are encased in a transparent PC polymer shell shaped like a fluorescent tube. Transparent polymer enclosures provide protection against fire and electric shock in the product. According to the standard requirements, energy saving lamp shell material must be V-1 grade above, so transparent polymer shell material must be V-1 grade above. For a V-1 case, the thickness of the case must be greater than or equal to the thickness required for the V-1 grade of the material. The fire rating and thickness requirements can be found on the raw material's UL yellow card. Many manufacturers in order to ensure the brightness of LED energy-saving lamps, often transparent polymer shell made very thin, which requires testing engineers to ensure that the material to achieve the required thickness of fire-proof grade. 2. Drop test. According to the product standard, the product will be dropped from a height of 0.91 m to a hard wooden board to simulate the drop that may occur in actual use, the outer shell of the product must not break to expose the dangerous live parts inside. The manufacturer must do this test before selecting the material to make the product Shell to avoid the loss caused by the batch production can not reach the standard. 3. Electric Resistance, the transparent enclosure encloses the power supply module, and the transparent enclosure material must meet the electric resistance strength requirement. Standard requirements, based on the North American Voltage 120 v conditions, internal high-voltage live parts and metal foil between the Shell to carry out the test, to withstand the AC 1240 v Resistance Test. In general, the product shell thickness of 0.8 mm or so, you can meet the test requirements of this electrical strength. 4. The power module, the power module is the LED energy-saving lamp important constituent, the power module mainly uses the switch power supply technology. According to the type of power module, you can consider using different standards for testing and certification. If the power module is a classII power source, this can be tested using UL1310 authentication. CLSSII power supply is an isolated type of transformer, the output voltage is less than 60 v DC, the current is less than 150 / VMAX amperes power supply. For non-classII sources, UL1012 is used to test the authentication. The technical requirements of the two standards are very similar and can be referred to each other. Most of the internal power modules of LED energy-saving lamps are connected with non-isolated power supply, and the output DC voltage of the power supply is more than 60 V, so UL1310 standard is not applicable, but UL10125, in the design of the structure, attention should be paid to the insulation requirements between dangerous live parts and touchable metal parts. Insulation can be space distance and creepage distance, can also be insulation sheet. According to the standard requirement, the space distance between the dangerous live parts and the metal parts to reach 3.2 mm and the creepage distance to reach 6.4 mm. If the distance is not enough, an additional piece of insulation can be added. The thickness of the piece must be greater than 0.71 mm. If the thickness is less than 0.71 mm, the product must withstand a high voltage test of 5000V. 6. Temperature rise test, temperature rise test is a must-do item of product safety test, the standard has certain temperature rise limit to different components. In the product design stage, the manufacturer should pay attention to the heat dissipation of the product, especially to some parts, such as insulation sheets, etc. . If the components work in high temperature for a long time, they may change their physical properties, resulting in fire or electric shock hazard. The internal power module of the lamp is in a closed and narrow space, and the heat dissipation is limited. Therefore, manufacturers should pay attention to the selection of the appropriate component specifications to ensure that the components work under a certain margin, so as to avoid overheating of the components under the conditions of near full load for a long time. 7. Structure, some LED lamp manufacturers in order to save costs, the plug-type components on the surface welding PCB, this practice is not desirable. The pin-type components welded on the surface are likely to fall off due to welding and other reasons, causing danger. Therefore, as far as possible for these components to take socket welding. If the surface welding method has to be used, then this element with the "l foot" and fixed with glue and other means to provide additional protection. 8. Fault testing, product fault testing is a very necessary test item in product certification testing. This test project is to short-circuit or open-circuit some of the components in the line, to simulate the actual use of the possible failure, so as to evaluate the product in a single fault conditions of safety. In order to meet this safety requirement, when designing the product, it is necessary to add a suitable fuse at the input end of the product to prevent over-current from causing fire in the extreme situation such as output short circuit and internal component failure.
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