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Explosion proof lighting fixtures are common explosion-proof electrical equipment, and their presence can be seen in many explosive hazardous areas. As a special lighting fixture, its installation, use, maintenance, replacement, and construction must comply with the requirements of relevant national explosion-proof standards to ensure its explosion-proof performance and the safety of the location.
What are the technical requirements for installing and replacing explosion-proof lamps in explosive hazardous areas?
The selection of explosion-proof lamps should be considered according to the installation siteEPLLevel and equipment category. If different power light sources can be used, the possibility of temperature group changes should be considered. Trigger for metal halide lamps, high-pressure sodium lamps, etcexplosion-proofAfter the bulb of the lamp is damaged, it should be replaced in a timely manner. Otherwise, the trigger in the entire circuit will mistakenly believe that the bulb is not lit and continuously emit high voltage triggers, resulting in long-term continuous high voltage burning of components such as ballasts, triggers, capacitors, etc.
The type, model, and power of explosion-proof lamps should meet the requirements of design and product technical conditions, and cannot be changed arbitrarily. When replacing the light bulb of the lighting device, the correct bulb rating and model should be used, otherwise it may cause excessive temperature. In places where color identification is required (such as on-site maintenance of large unit equipment), explosion-proof floodlights can be used, with metal halide lamps as the light source and a rated power of up to1000W.
Due to the special structure, explosion-proof lamps have higher sealing performance than ordinary lamps, and the temperature rise generated during operation can easily affect the service life of the components. Confirm to replace the bulb before or when the rated lifespan is reached; Exceeding the rated lifespan reduces light output, increases energy consumption, and increases the likelihood of lamp breakage.
The emergency power supply of emergency explosion-proof lamps should be fully discharged before use, and then charged once24Normal use can only be entered after hours, otherwise it will reduce the battery's storage capacity. The emergency device must be charged and discharged every three months. The working voltage for the normal operation of explosion-proof lamps should be stable at220Soil5%VBetween them, frequent fluctuations are not allowed, otherwise it is easy to burn out the lighting components. If conditions permit, it is best to configure a regulated power supply.
The original rubber sealing ring and retaining ring of the explosion-proof lamp are accessories that ensure the sealing of the lamp's wires and cables when it leaves the factory. They cannot be omitted or discarded, and cannot be replaced arbitrarily, otherwise it will damage the overall explosion-proof function of the lamp. The sealed part of the lamp should not be disassembled and opened frequently.
When selecting light sources and ballasts, attention should be paid to uniform model specifications. Inconsistencies may cause functional impairment or damage. It is recommended to choose well-known brands. If the light source is damaged, it should be turned off and replaced in a timely manner. After the ignition of light sources such as metal halide lamps and high-pressure sodium lamps is turned off or extinguished, they must be cooled for fifteen minutes until the temperature of the light source drops before the power can be turned on and restarted. Hot start can easily damage or burn out the light source.
Working in a continuous operation system(24Hours/day,7All kinds of light sources in the day/week should be turned off once a week, at least once a week15-30minute. If this operation is not followed, it will increase the possibility of light source rupture and affect the lifespan of the light source. After the installation of explosion-proof lamps is completed, the insulation resistance between the pole and the shell should be checked for normality when delivering them. Explosion proof lamps should be stored in well ventilated areas with no dripping or liquid intrusion, and the air humidity should not exceed90% ,The temperature is not higher than40℃, not less than25℃In the warehouse, and the storage period shall not exceed one year.
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