Ungroup,High Quality Ungroup,Ungroup Details, CN Ningbo Wason Lighting Technology Co.,Ltd , https://www.nbwasonled.com
The use of square LED explosion-proof lights need to pay attention to matters needing attention
With the rapid development of petroleum, chemical and other industries, lighting fixtures are used more and more widely in production, warehousing and rescue. How to prevent accidental explosion of lighting fixtures has become a very important issue in explosive gas hazardous locations. As the lighting fixtures inevitably produce sparks or form hot surfaces during work, once the square LED explosion-proof lamp meets the explosive gas mixture at the production or rescue site, an explosion accident may occur, directly endangering the national property and citizens’ lives. Safety. Therefore, as the most widely used lighting fixture, the explosion-proof technology of square LED explosion-proof lamps has long attracted people's attention and great attention.
The square LED explosion-proof lamp and lampshade should be able to automatically cut off the power before opening. However, due to the complexity of the installation of the interlocking device, it is not easy to implement. Therefore, most lamps and lanterns are only equipped with warning signs that are not allowed to open on the outside of the housing. Because the surface temperature of the lamp after power off is still very high, such as immediately opening the lampshade, there is still the danger of igniting the explosive gas mixture, so the incandescent lamp, high pressure mercury lamp, high pressure sodium lamp, the lamp surface temperature of the lamp can quickly open the lid Lamps should pay attention to this point. When replacing bulbs (tubes), the flameproof joints of explosion-proof lamps shall be properly protected and shall not be damaged; there shall be no rust layer on the explosion-proof surfaces; if there is slight rust, there shall be no hemp surface after cleaning. The seals used for dust protection and waterproofing must be kept intact. This is very important for the increased safety lighting. If the seal is seriously damaged, replace it with a seal of the same size and material and replace the entire light if necessary. When overhauling, pay attention to whether the lampshade is intact and replace it immediately if it is broken.
The power LED design of the square LED explosion-proof lamp requires attention:
1, square LED explosion-proof lamp power supply to constant current
The characteristics of LED lighting materials determine that they are influenced by the environment. For example, if the temperature changes, the LED current will increase, the voltage will increase, and the LED current will increase. Long-term operation beyond the rated current will greatly shorten the LED lamp life. The constant current of LED is to ensure that the operating current value does not change when the environmental factors such as temperature and voltage change.
2, pay attention to square LED explosion-proof lamp power constant current accuracy
The constant current accuracy of some power supplies on the market is poor, like the constant current schemes such as the popular recommended solutions on the market, the error reaches ±8%, and the constant current error is too large. The general requirement is ±3%. Press 3% of the design plan. The power supply must be fine-tuned to achieve ±3% error. Focus on explosion-proof safety and health.
4, square LED explosion-proof lights need to be isolated or non-isolated
General isolated power supply such as made 15W, on the factory explosion-proof power supply tube, the transformer is very large, it is difficult to put in. Mainly depends on the spatial structure depending on the specific circumstances, the isolation can only be done generally 15W, rarely more than 15W, and the price is very expensive. Therefore, the cost-effectiveness of isolation is not high. Generally, non-isolated ones dominate the mainstream, and the volume can be made smaller. The minimum size can be as high as 8 mm. In fact, non-isolated security measures are done well, and there is no problem. Space allows it to do isolated power.
5, pay attention to the square LED explosion-proof lamp power dissipation
The main factor of the heat dissipation scheme is that the factory-use explosion-proof lamp power beads can greatly prolong the service life when used under the conditions of explosion-proof lamps in the heat plant. Aluminum alloys are generally used and heat dissipation is easier. That is, the factory explosion-proof lamp power beads are attached to the aluminum substrate, and the external heat dissipation area is maximized. Focus on explosion-proof safety and health.