1. raw materials

LED explosion-proof lamps can be made into various shapes such as spherical tube type. Take the tube type LED fluorescent lamp as an example. Its appearance design is the same as that of ordinary fluorescent LED tubes. And LEDs are wrapped inside. The transparent polymer casing has the functions of fire safety and preventing electric shock in the commodity. According to the regulations, the raw materials of the LED energy-saving lamp housing must be above the V-1 level, so the transparent polymer housing must use the raw materials above the V-1 level. To achieve the V-1 level of the commercial casing, the thickness must be higher than or equal to the thickness specified by the V-1 level of the raw material, and the flame retardant grade and thickness requirements can be found on the UL yellow card of the raw material. In order to better ensure the chromaticity of LED explosion-proof lamps, many manufacturers usually make the transparent polymer casing very thin, so the inspection engineer must pay attention to ensure that the raw materials are as thin and thick as the flame retardant grade.

2. drop test

According to the product implementation standard, the product must simulate the drop test that is likely to occur in the whole process of the specific application. The product must be dropped from the aspect ratio of more than 0.91 meters to the hardwood board. so as to expose the risk of internal energized parts. When manufacturers choose raw materials to make commodity casings, they must do this test in advance to prevent damage caused by unqualified mass production.

3. Electrical compressive strength

The transparent casing surrounds the power module inside, and the raw material of the transparent casing must meet the requirements of electrical and compressive strength. According to the regulations, according to the working voltage of 120 volts in North America, the internal high-voltage current-carrying parts and the casing (covered with metal foil for experiments) must be able to undertake the 1240 volts communication and compressive strength test. Under normal circumstances, if the thickness of the product casing is about 0.8mm, it can meet the test requirements for the resistance and compressive strength.

4. power module

The power module is a key component of the LED explosion-proof lamp, and the power module mainly adopts the power switching power supply technology. According to the different types of power modules, it can be considered to carry out testing and verification with different specifications. If the power module is a class II power supply, this can be tested and verified by UL1310. Class II power supply refers to the use of protective transformers, the output voltage is less than 60 volts DC, and the current is less than 150/Vmax amps. For non-class II power supplies, UL1012 is selected for testing and verification. The technical standards of these two specifications are very similar and can be referred to each other. Most of the internal power modules of LED energy-saving lamps use non-protective power supply, and the output AC voltage of the power supply exceeds 60 volts, so it is not suitable for UL1310 specifications, but UL1012 can be used.