Explosion-proof LED circuit description and installation notes
2023-10-18 14:11:36
Lighting measures must be taken in any workplace and environment, and places containing various explosive gases are no exception. Because of its many places of use, all over the production corners, explosion proof lighting products are produced in large quantities. LED's unique longevity, environmental protection, durability, and other characteristics, more and more show the advantages of explosion-proof electrical, especially explosion-proof lamps. LED's huge market is destined to develop into a huge industry, and the application of LED in explosion-proof and other special lamps is also a general trend.
Line description:
1. Location Selection Electrical lines should be laid where there is a low risk of explosion or where it is far from the source of release.
2. Laying Mode Selection Explosion Hazard The electrical lines in the environment are mainly explosion-proof steel pipe wiring and cable wiring.
3ã€.Isolation Sealing When laying the channels of electrical lines and protective tubes, cables or steel pipes through partitions or floors between areas with different explosion hazard environment levels, non-combustible materials should be used to block them tightly.
4, the choice of wire material explosion hazardous areas within the scope of the risk zone 1, the distribution line should use copper conductors or cables. Multiple stranded copper core cords or stranded copper core cables should be used where there is severe vibration. Aluminum core power cables must not be used underground in coal mines.
Within the scope of Zone 2 of the Hazardous Degree of Explosion Hazard, the power lines shall use aluminum core conductors or cables with a cross-sectional area of ​​4 mm2 and above, and the lighting circuit may use a cross-sectional area of ​​2.5 mm2. And above aluminum conductors or cables.
5. The selection of the section of insulated conductors and cable cross-sections in the zone 1 and zone 2 of the current-carrying capacity shall be allowed. The allowable ampacity of the conductor shall not be less than 1.25 times the rated current of the fuse melt rated current and the breaker time delay overcurrent release. The allowable ampacity for the branch line leading to the low-pressure cage induction motor shall not be less than 1.25 times the rated current of the motor.
6. Electrical connections The intermediate connections of the electrical circuits in zones 1 and 2 must be internal to the explosion-proof junction boxes or splice enclosures that are compatible with the hazardous environment. Zone 1 should be flameproof junction box, and zone 2 can be increased safety junction box.
When using aluminum core cables or conductors in the electrical circuit in Zone 2, it must be reliable so that the user can correctly install and repair it.
Installation and maintenance
Explosion-proof lights must be checked from the nameplate and the product specification before installation: explosion-proof type, type, grade, group; degree of protection of the enclosure; installation method and fastener requirements for installation. The installation of explosion-proof lights must be securely secured, the fastening bolts must not be replaced, and the spring washers should be complete. The dust-proof and waterproof seals should be placed as they are. When the cable enters the line, the cable and the sealing gasket should be closely matched. The section of the cable should be round, and the surface of the jacket should not have defects such as asperities. Extra inlets shall be sealed in accordance with the type of explosion protection, and tighten the compression nut to seal the inlet.
Precautions
1. Regularly eliminate dust and dirt on the explosion-proof lamp housing to improve the light efficiency and heat dissipation performance of the lamp. The cleaning method can be based on the protection capability of the lamp housing, using water spray (over the shade on the lamp) or using a damp cloth. When cleaning with water spray, the power should be cut off. Never use a dry cloth to scrub the plastic housing (transparent parts) of the lamp to prevent static electricity.
2. Check whether the transparent parts have been affected by foreign material, whether the protection network has loosened, stripped, and corroded. If so, use should be stopped and repaired and replaced in time.
3. The light source should be turned off in a timely manner to notify the light to be replaced, so as to prevent the ballast and other electrical components from being in an abnormal state for a long time because the light source cannot be started.
4. If the accumulated water in the cavity of the lamp used in the humid environment should be cleared in time, replace the sealing parts to ensure the protective performance of the enclosure.
5. When you open the lamp cover, you should press the warning board to open the cover after turning off the power.
6. After opening the cover, check whether the flameproof joint surface is intact, whether the rubber seal is hardened or becomes sticky, whether the wire insulation layer is green and carbonized, and whether the insulation and electrical components are deformed and burned. If these problems are found, they should be promptly repaired and replaced.
7. Before applying the cover, apply a damp cloth (not excessively wet) to light the light and transparent parts of the light fixture to increase the efficacy of the light fixture. A layer of 204-1 displacement rust preventive oil should be applied thinly on the flameproof joint surface. When the lid is closed, attention should be paid to whether the sealing ring plays a sealing role in the original position.
8. The sealed part of the lamp should not be frequently disassembled and opened. Patent zone road sealing technology; more in line with national explosion-proof new technology.
Line description:
1. Location Selection Electrical lines should be laid where there is a low risk of explosion or where it is far from the source of release.
2. Laying Mode Selection Explosion Hazard The electrical lines in the environment are mainly explosion-proof steel pipe wiring and cable wiring.
3ã€.Isolation Sealing When laying the channels of electrical lines and protective tubes, cables or steel pipes through partitions or floors between areas with different explosion hazard environment levels, non-combustible materials should be used to block them tightly.
4, the choice of wire material explosion hazardous areas within the scope of the risk zone 1, the distribution line should use copper conductors or cables. Multiple stranded copper core cords or stranded copper core cables should be used where there is severe vibration. Aluminum core power cables must not be used underground in coal mines.
Within the scope of Zone 2 of the Hazardous Degree of Explosion Hazard, the power lines shall use aluminum core conductors or cables with a cross-sectional area of ​​4 mm2 and above, and the lighting circuit may use a cross-sectional area of ​​2.5 mm2. And above aluminum conductors or cables.
5. The selection of the section of insulated conductors and cable cross-sections in the zone 1 and zone 2 of the current-carrying capacity shall be allowed. The allowable ampacity of the conductor shall not be less than 1.25 times the rated current of the fuse melt rated current and the breaker time delay overcurrent release. The allowable ampacity for the branch line leading to the low-pressure cage induction motor shall not be less than 1.25 times the rated current of the motor.
6. Electrical connections The intermediate connections of the electrical circuits in zones 1 and 2 must be internal to the explosion-proof junction boxes or splice enclosures that are compatible with the hazardous environment. Zone 1 should be flameproof junction box, and zone 2 can be increased safety junction box.
When using aluminum core cables or conductors in the electrical circuit in Zone 2, it must be reliable so that the user can correctly install and repair it.
Installation and maintenance
Explosion-proof lights must be checked from the nameplate and the product specification before installation: explosion-proof type, type, grade, group; degree of protection of the enclosure; installation method and fastener requirements for installation. The installation of explosion-proof lights must be securely secured, the fastening bolts must not be replaced, and the spring washers should be complete. The dust-proof and waterproof seals should be placed as they are. When the cable enters the line, the cable and the sealing gasket should be closely matched. The section of the cable should be round, and the surface of the jacket should not have defects such as asperities. Extra inlets shall be sealed in accordance with the type of explosion protection, and tighten the compression nut to seal the inlet.
Precautions
1. Regularly eliminate dust and dirt on the explosion-proof lamp housing to improve the light efficiency and heat dissipation performance of the lamp. The cleaning method can be based on the protection capability of the lamp housing, using water spray (over the shade on the lamp) or using a damp cloth. When cleaning with water spray, the power should be cut off. Never use a dry cloth to scrub the plastic housing (transparent parts) of the lamp to prevent static electricity.
2. Check whether the transparent parts have been affected by foreign material, whether the protection network has loosened, stripped, and corroded. If so, use should be stopped and repaired and replaced in time.
3. The light source should be turned off in a timely manner to notify the light to be replaced, so as to prevent the ballast and other electrical components from being in an abnormal state for a long time because the light source cannot be started.
4. If the accumulated water in the cavity of the lamp used in the humid environment should be cleared in time, replace the sealing parts to ensure the protective performance of the enclosure.
5. When you open the lamp cover, you should press the warning board to open the cover after turning off the power.
6. After opening the cover, check whether the flameproof joint surface is intact, whether the rubber seal is hardened or becomes sticky, whether the wire insulation layer is green and carbonized, and whether the insulation and electrical components are deformed and burned. If these problems are found, they should be promptly repaired and replaced.
7. Before applying the cover, apply a damp cloth (not excessively wet) to light the light and transparent parts of the light fixture to increase the efficacy of the light fixture. A layer of 204-1 displacement rust preventive oil should be applied thinly on the flameproof joint surface. When the lid is closed, attention should be paid to whether the sealing ring plays a sealing role in the original position.
8. The sealed part of the lamp should not be frequently disassembled and opened. Patent zone road sealing technology; more in line with national explosion-proof new technology.
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