The selection, installation, use and maintenance of explosion-proof lamps are all indispensable links to ensure the long-term safety, reliability and efficient operation of explosion-proof lamps, and must be given full attention.
1 The selection personnel must understand the basic working principle of explosion-proof lamps and be familiar with explosion-proof signs.
2 Accurately select the explosion-proof category, type, level and temperature group of the lamps according to the level of the explosive hazardous location.
3 Understand the environmental conditions and work requirements, and reasonably choose explosion-proof lamps with various functions. For example, the enclosure protection level of explosion-proof lamps used outdoors is at least IP43. In places where color identification is required, high-pressure mercury lamps and high-pressure sodium lamps cannot be used for explosion-proof lamps, because these two light sources have poor color rendering.
4 Read the product instruction manual in detail to understand the product's performance, precautions and product limitations, and understand the contents of all signs of the product. If there is an 'x' symbol after the explosion-proof certificate number, it means that the lamp has a specific applicable place. You should refer to the product instruction manual and nameplate to clarify the applicable place requirements.
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Light source selection
Although incandescent lamps are still widely used, they are gradually being replaced by other light sources due to their low luminous efficiency and short lifespan. Among them, single-plug starterless fluorescent lamps and self-ballasted high-pressure mercury lamps and high-pressure sodium lamps are widely used.
The author's production unit mainly uses single-plug starterless fluorescent lamps and self-ballasted high-pressure mercury lamps. For the original fixed explosion-proof incandescent lamps, in the case of meeting the minimum distance between the bulb and the transparent cover stipulated in the regulations, approved by the relevant units, the incandescent bulbs were replaced with self-ballasted high-pressure mercury bulbs by the original lamps. Although high-pressure sodium lamps have certain energy-saving effects, due to their poor color rendering, we generally do not use them in production devices, but only use them in road lighting. Sometimes in order to improve the straight white light color emitted by the high-pressure mercury lamp, some high-pressure sodium lamps can also be mixed in the production device. For places requiring high-intensity lighting with good color rendering (such as on-site maintenance of large unit equipment), explosion-proof floodlights can be selected. The light source is generally metal halide lamps, and the rated power can reach more than 1000W.
structure type
The explosion-proof structure type of explosion-proof lamps should be determined according to the regional level and scope of the explosive gas environment. For example, explosion-proof lamps must be used in zone 1; fixed lamps in zone 2 can be explosion-proof and increased safety type, and mobile lamps must be used. Use explosion-proof type. The level or group of the selected explosion-proof lamp should not be lower than the level and group of the explosive mixture in the explosion-hazardous environment. At the same time, the influence of the environment on the explosion-proof lamp should be considered, and it should meet the requirements of various environments such as ambient temperature, air humidity, corrosive or polluting substances. The protection level and anti-corrosion level of lamps and lanterns should be selected according to different environmental requirements. Especially in the presence of corrosive gases in explosive gas environments, it is crucial to choose lamps with corresponding anti-corrosion properties.
In the past, in petrochemical enterprises, explosion-proof lighting was mainly used in explosion-hazardous places. With the wide application of increased-safety electrical equipment in Zone 2 explosion hazard areas, increased-safety and composite lighting fixtures are also being used more and more. On the basis of certain explosion-proof performance, the increased safety lamps have the advantages of light weight, low price, convenient installation and maintenance, and long service life compared with explosion-proof lamps. The most common composite electrical equipment used in petrochemical enterprises is the increased safety-explosion-proof composite explosion-proof electrical equipment, which generally consists of three parts: flameproof components, increased safety terminals and increased safety enclosures. performance, but also has the advantages of increased safety.
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