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Installation and construction requirements for explosion-proof lighting fixtures

SINO Testing Services

| 2020-11-02|Return

Explosion proof lamps are a common type of 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 lighting fixtures in explosive hazardous areas?

The selection of explosion-proof lighting fixtures should be considered based on the installation site's situationEPLLevel and equipment category. If different power 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 light 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 light bulb is not on and continuously emit high voltage triggering, resulting in long-term continuous high voltage burning of components such as ballasts, triggers, and capacitors.

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 discrimination is required (such as on-site maintenance of large unit equipment), explosion-proof floodlights can be selected, and their light source is generally metal halide lamps, with a rated power of up to1000W.

Explosion proof lamps have higher sealing performance than ordinary lamps due to their unique structure, and the temperature rise generated during operation can easily affect the service life of the components. Confirm the replacement of the light 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 for 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. Emergency devices must be charged and discharged every three months. The working voltage of explosion-proof lamps should be stable during normal operation220Soil5% VBetween them, they should not fluctuate frequently, otherwise it is easy to burn out the lighting components. If conditions permit, it is best to configure a voltage stabilizing power supply.

The original rubber sealing rings and retaining rings of explosion-proof lamps are accessories that ensure the sealing of the wires and cables of the lamps when they leave the factory. They cannot be omitted or discarded, and cannot be replaced arbitrarily, otherwise it will damage the overall explosion-proof function of the lamps. The sealed part of the lamp should not be frequently disassembled and opened.

When selecting light sources and ballasts, attention should be paid to uniform model specifications. Inconsistencies may cause functional impairment or damage, and 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 light source ignited by metal halide lamps, high-pressure sodium lamps, etc. is turned off or extinguished, it must be cooled for fifteen minutes until the temperature of the light source drops before it can be turned on and restarted. Hot start can easily damage or burn out the light source.

Working in a continuous operating system(24)Hours/Day,7The various 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 lighting fixtures is completed, the insulation resistance between the pole and the shell should be checked to ensure it is normal when delivering points. Explosion proof lamps should be stored in air circulation, without dripping or liquid invasion, and the air humidity should not exceed90%,Temperature not higher than40 ℃, not less than25 ℃In the warehouse, and the storage period shall not exceed one year.


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