Characteristics of explosion-proof power cabinet and common installation issues
Characteristics of explosion-proof power cabinet and common installation issues
With the rapid development of crude oil, chemical plants, flammable and explosive environments, engineering projects, industrial and mining enterprises, and coal industries, the application of explosion-proof distribution cabinets in manufacturing, warehousing and logistics, and emergency rescue is becoming increasingly widespread, with more and more types.。How to prevent accidental explosions of explosion-proof distribution cabinets in explosive dust hazardous sites has become a very important research topic.。Because explosion-proof power distribution cabinets inevitably cause spark discharge during operation, once they come into contact with explosive gas mixtures at supply and emergency rescue sites, explosion incidents can occur, immediately endangering national property and the safety of Chinese citizens' lives and property. Therefore, as widely used explosion-proof equipment, their explosion-proof technical challenges have long attracted widespread public attention and significant concern.WeldingNextComeSmallCodeThenToGreaterManufacturerintroductionOneNextExplosion-proof PowerCabinetfeature And UsestandardizedExplosion-proof PowerCabinet的Special征:
1、explosion-proofDriveStrengthDistribution BoxEnclosureChooseZL102Aluminum AlloyCastCreate Or SubwayPlateWeldingCostDescribe，TableLayer髙Pressurestatic electricityDustLastSpray Painting，DistributionStainless SteelPlateDewOutputStandard Parts，SupplierQualityCreateTypeBrightView。
2. The explosion-proof power cabinet has exquisite design and is safe and practical.。
3. The enclosure drawings can be provided by the user or the manufacturer.。
4. Explosion-proof lighting (drive) distribution cabinets adopt a composite, modular structure, and each control circuit can be freely assembled according to actual conditions. Generally, distribution boxes use explosion-proof structures, while busway boxes and branch outlet boxes use flameproof structures.。
5. Internal components can be assembled with high-breaking isolating switches or molded case circuit breakers according to customer requirements.。Such asDZ47、C65、DZ158、NM1、CM1Etc.。
6. Special fabrication can be done as needed, such as installing surge protectors, ammeters, current meters, etc., and the exterior can be equipped with handle locks and metal levers.。
7. Suitable for lighting and drive power distribution circuits, with breaking, load, undervoltage protection, and short-circuit automatic power-off functions. Both conduit and cable routing are acceptable.。
8. Compliant with GB3836-2000 and IEC60079 standards.。Explosive gas environment hazardous sites: Zone 1, Zone 2; flammable gas and vapor classes: IIA, IIB; temperature classes: T1 to T4; combustible dust environments: Zone 20, Zone 21, Zone 22; indoor and outdoor (IP54).。
This product is of composite type. The distribution box uses an explosion-proof structure, while the busway box and branch outlet boxes use flameproof structures.。Cast aluminum enclosure, with high-breaking miniature circuit breakers or molded case circuit breakers inside. Options include C45, C65, and CM1. It has overload and overcurrent protection functions. Special requirements can be custom-made. Both conduit and cable wiring are available.Overall乎GB3836-2000、IEC60079, GB12476.1-2000、IEC61241standardizedStandard
explosion-proofDriveStrengthDistribution BoxInstallationFAQ:
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2. The electrode connection wires inside explosion-proof distribution cabinets should use insulated conductors, with connections that do not loosen and no exposed live parts; the working neutral wire in distribution cabinets and boxes should be connected through terminal blocks, separately arranged from the protective neutral wire terminal blocks; the metal enclosure, metal electrical mounting plates, and electrical equipment inside the box that have conductive metal bases or housings must be protected by neutral grounding, and the protective neutral wire should be connected through terminal blocks.。
3. Explosion-proof distribution cabinets and distribution boxes should be installed in well-ventilated, dry, and normal-temperature locations.。It is prohibited to install them in places severely affected by harmful media such as coal gas, dust, steam, liquids, and other hazardous substances, and they must not be installed in areas subject to impact, vibration, liquid splashing, or heat source baking; there should be sufficient space and passage for two people to work simultaneously around the power box and distribution box, and no items obstructing operation or maintenance should be stacked, nor should there be weeds or shrubs.
4. Explosion-proof distribution cabinets should be made of stainless steel plates, aluminum enclosures, stainless steel, or good insulating materials. The thickness of aluminum plates must meet the national standard of 4mm; the electrical equipment inside the cabinet should first be installed on metal or non-wood insulating electrical mounting plates, then the entire assembly should be secured inside the cabinet body; the metal and the cabinet enclosure must be electrically connected and grounded.。
5. Explosion-proof power cabinets and explosion-proof lighting boxes should preferably be set up separately. If combined in the same distribution cabinet, the power and lighting wiring should be installed separately.。
6. The power supply and distribution system at construction sites implements classified distribution equipment, requiring a main distribution box (or distribution room), with sub-distribution boxes set below the main distribution box, and distribution boxes set below the sub-distribution boxes, with electrical equipment below the distribution boxes.
7. The distribution cabinet and distribution box should be installed firmly and upright; mobile distribution cabinets and boxes should be placed on sturdy frames, with the rear bottom edge of mobile distribution cabinets and boxes at a safe distance from the ground of not less than 1.3m and not more than 1.5m; the bottom surface of mobile distribution boxes and distribution boxes should have a safe distance from the ground of more than 0.6m and less than 1.5m; each distribution cabinet and distribution box should be waterproof, rainproof, and dustproof.
8. The main distribution cabinet should be installed near the power source area; the distribution cabinet should be placed in areas where electrical equipment or loads are concentrated; the distance between the distribution cabinet and the main distribution cabinet should not exceed 30m. The distribution cabinet should be powered by the final-stage distribution cabinet, and the vertical distance between the distribution cabinet and the mobile electrical equipment it controls should not exceed 3m.9. General customer requirements for the appearance of explosion-proof distribution cabinets may primarily concern color and surface uniformity. In fact, these requirements are also the standards that our distribution cabinet manufacturer sets for our own products. The surface color of the distribution cabinets will be applied through electrostatic powder spraying according to the customer's specific needs.。
The coating should adhere firmly, have uniform color tone, and be free from safety hazards such as wrinkles, peeling, color spots, and missed spraying. When observed from a distance of 1 km, there should be no obvious color difference or reflection. The surface should be smooth, clean, and free from damage such as dents and scratches.。Other coated components commonly used in the cabinet must also be free from safety hazards such as peeling, color spots, sand holes, and corrosion. The appearance quality must meet the same requirements as above.。The interior of the distribution cabinet should be clean. Apart from materials and accessories provided for users, as well as components compliant with relevant national standards, there should be no debris, dust, or other contaminants inside the cabinet.。
11. Appearance requirements and mechanical specifications for the distribution cabinet from the explosion-proof distribution cabinet manufacturer.。The stainless steel thickness used for the distribution cabinet enclosure should not be less than 1.5mm, and the distribution box body should be made of cold-rolled steel plate with a thickness of not less than 2.0mm. The thickness of the steel plate cabinet door and steel plate panel should not be less than 2.0mm, and the side plate thickness should not be less than 3.0mm. The slide rails must be firm, and the structure of the distribution box should be detailed and sturdy. At the same time, two load-bearing ears should be welded at the lower left and upper right of the back of the general vertical distribution cabinet, using 40X4 galvanized flat steel with a length of 10cm.
12. A series of problems occurring in the later stage of explosion-proof distribution cabinets are closely related to the electronic components placed inside the cabinet and the setup of the cabinet. To address these later-stage issues, we should make relevant preparatory work as early as possible.
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14. In case of faults or abnormal operation, rely on protective electrical appliances to disconnect the power circuit or report alarms. With measuring instruments, various main parameters during operation can be displayed, and some electrical equipment parameters can be adjusted, with reminders or signals for deviations from normal operation. It is mainly used in power generation stations, distribution stations, and substations. Once our distribution cabinet encounters operational obstacles, we must take corresponding measures as early as possible to ensure that the electronic components are not subjected to corresponding losses.
