Usage and maintenance of explosion-proof lighting fixtures

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Explosion-proof lighting fixtures are used in Zone 1 and Zone 2 areas with explosive gas environments, as well as in IIA, IIB, and IIC categories of explosive gas environments within temperature groups T1–T6； It is widely used in explosive and hazardous environments such as oil extraction and storage, the chemical industry, pharmaceuticals, the military industry, and various facilities, as special lighting fixtures for factory areas or roads. Many factories choose to purchase explosion-proof lighting because their regular inspections fail. Previously, some ordinary lighting fixtures might have been used, and that is not safe. If a factory generates flammable and explosive gases during production, we require that the factory use explosion-proof lighting. http://www.bzc51.cn/upload/201805/1527558628322794.jpg Many people buy explosion-proof lamps but do not know how to use or maintain them; below is an explanation of how to use such lamps. And the precautions for using explosion-proof lighting fixtures. Explosion-proof lighting fixtures are usually sold as complete sets; once purchased, they can be used after being connected and wired. Below are the precautions to keep in mind when replacing a light bulb. The power supply should be cut off before opening the lamp cover of the explosion-proof lamp. However, due to the complicated setup of interlock devices, it is not easy to implement this, so most lamps simply have warning signs with phrases such as “Do not open while powered on” placed in prominent locations on their housings. Furthermore, since the surface temperature of the bulb remains high even after the power is cut off, there is still a risk of ignition of explosive gas mixtures if the lamp cover is opened immediately (especially in explosion-proof designs). Therefore, for light sources such as incandescent lamps, high-pressure mercury lamps, and high-pressure sodium lamps, which have high surface temperatures, care must be taken in fixtures that allow the covers to be opened quickly. 　 When replacing the bulb (tube), the flameproof joint surface of the explosion-proof lamp must be properly maintained and not damaged; after cleaning, the flameproof surface should be coated with phosphating paste or 204-1 rust preventive oil – no other types of paint should be used. There should be no rust layer on the flameproof surface, and if there is slight rust, the surface should be free of any pitted appearance after cleaning. It is essential to ensure that the sealing rings used for dust and water protection are intact, as this is very important for intrinsically safe lighting fixtures. If the sealing ring is severely damaged, it must be replaced with a sealing ring of the same standard and material; if necessary, the entire lamp should be replaced. During maintenance, check to ensure the lamp shade is intact; if there are any cracks, it must be replaced immediately.