In flammable gas and combustible dust environments, conventional electrical equipment poses severe safety risks. Explosion-proof Distribution Cabinet from Zhongcheng Machinery delivers a complete power distribution assembly specifically engineered for hazardous industrial zones. Our cabinets provide centralized power distribution with IP65+ protection across multiple voltage specifications including 220V/380V/660V. With Ex d IIB T4 Gb certification and ATEX compliance, these units isolate internal sparks while supporting multi-circuit customized design. Backed by over 30 years of manufacturing expertise, we offer flexible configurations suitable for petrochemical, coal mine, military, and port projects—ensuring your operations meet explosion-proof power supply standards without compromise.
This electrical cabinet is far more than a simple metal housing for electrical components. Constructed with precision as a safety barrier, it contains internal explosions and prevents ignition of flammable surrounding atmospheres.
Three major problems you encounter in unstable situations are resolved by these specific enclosures. They first reduce your facility's risk of catastrophic fire and explosion. Secondly, they guarantee that your operations adhere to international safety standards such as ATEX and IECEx. Thirdly, they shield delicate electrical parts from corrosive environments that lead to early equipment failure.
Centralized power distribution with extensive overload and short-circuit protection is the cabinet's primary function. Sparks and high temperatures are present in the flameproof structure when internal electrical faults occur. Before departing gases enter the external atmosphere, precisely machined flame routes cool them below auto-ignition temperatures.
Your operational safety depends on selecting cabinets with appropriate technical parameters. Our Explosion-proof Distribution Cabinet systems feature specifications designed for maximum reliability.
| Parameter | Specification |
|---|---|
| Protection Type | Ex d IIB T4 Gb / Ex tD A21 IP65 |
| Enclosure Material | Carbon steel, 304/316L stainless steel, aluminum alloy |
| IP Rating | IP65, IP66, IP67 available |
| Voltage Options | 220V / 380V / 660V |
| Impact Resistance | IK10 |
| Corrosion Rating | WF1 / WF2 |
| Temperature Class | T4, T6 optional |
| Pressure Rating | 1.5× reference pressure |
High-strength materials with cutting-edge anti-corrosion treatment are used in the cabinet body. As a standard, protection levels approach IP65, successfully preventing dust and water jets from entering. IP67-rated stainless steel structure offers exceptional endurance in highly corrosive or marine conditions.
Surface temperature control remains critical for preventing external ignition. Our T6-rated models maintain external temperatures below 85°C even under maximum load conditions. This specification proves essential when working with low auto-ignition temperature gases.
| Technical Specifications | ||
|---|---|---|
| 1 | Rated Voltage | AC380V/660V |
| 2 | Explosion-proof Grade | Exd IIB T4 |
| 3 | Rated Current | 100A–630A |
| 4 | Protection Class | IP55 and above |
| 5 | Material | Carbon steel enclosure with high-pressure electrostatic spraying; Flatness of explosion-proof surface ≤0.5mm |
| 6 | Structure | Floor-standing type, compatible with circuit breaker, contactor, soft starter and PLC |
Your facility's safety infrastructure requires equipment that performs reliably under extreme conditions. Our cabinets deliver multiple layers of protection through thoughtful engineering.
Flameproof structural integrity forms the foundation of safety. The integral explosion-proof structure complies with national explosion-proof standards. All joints feature high-precision flameproof gaps measured to exact tolerances. When internal faults generate sparks or arcs, the enclosure contains the explosion completely.
Pressure relief systems respond instantly to abnormal conditions. Professional pressure relief devices release internal pressure rapidly while blocking flame spread. This dual-action protection prevents cabinet rupture and external ignition simultaneously.
Electrical stability comes from premium components rated for hazardous locations. Internal breakers, contactors, and relays all carry explosion-proof certifications. Overload protection, short-circuit interruption, and leakage detection operate continuously to safeguard your power supply.
Intelligent monitoring capability enhances operational oversight. Real-time monitoring tracks voltage, current, and internal temperature. The system triggers automatic alarms and initiates emergency power cuts when parameters exceed safe thresholds. This proactive approach minimizes downtime and prevents equipment damage.
Operational accessibility balances safety with usability. Explosion-proof operation panels provide clear visual status indicators. Door interlocking devices prevent accidental opening under live conditions. All controls are positioned for intuitive access while maintaining hazardous area protection.
Different industrial sectors present unique challenges requiring tailored solutions. Our Explosion-proof Distribution Cabinet systems adapt to diverse hazardous environments.
Volatile hydrocarbons are processed in Zone 1 and Zone 2 classed areas by petrochemical plants and refineries. Cabinets that control high electrical loads and contain potential ignition sources are necessary for your processes involving ethylene, propylene, or hydrogen. Complex distribution needs for processing units, compressor facilities, and pump stations are supported by our multi-circuit designs.
Extreme maritime corrosion and explosive dangers are combined in offshore drilling rigs. Demanding conditions include extreme humidity, frequent vibration, and salt spray. The durability required for prolonged operation in these settings is provided by stainless steel 316L construction with improved sealing.
Coal dust and flammable methane gas coexist in coal mining operations. Gas and dust protection ratings are necessary for subterranean distribution stations. In a single sturdy enclosure, our dual-certified units satisfy Ex d for gas protection and Ex tD for dust protection.
In Zone 21 and Zone 22, pharmaceutical and grain processing plants deal with fine organic dusts that can ignite. While sealed structure inhibits particle penetration, surface temperature regulation keeps dust clouds from igniting. Conveyors, dust collecting systems, and mixing equipment all receive safe electricity thanks to this protection.
Chemical storage facilities and port facilities handle a variety of hazardous products in outdoor settings. Chemical compatibility and weather resistance work together to deliver dependable performance in the face of temperature extremes and exposure to a variety of chemicals.
Because explosion-proof equipment has undergone extensive testing and certification, you may feel confident using it. We put in place thorough quality control procedures that are in line with global norms.
To ensure structural integrity in the event of an internal explosion, hydrostatic pressure testing is performed on each cabinet. Test pressures must be tolerated by the enclosure without causing irreversible distortion or seal failure.
Flamepath measurement uses precision gauges to confirm all gaps meet specified tolerances. These measurements ensure escaping gases cool sufficiently before contacting external atmospheres.
IP rating verification tests seals against water jets and dust exposure matching your operational environment. We provide detailed test reports documenting ingress protection levels.
Temperature rise testing confirms external surface temperatures remain within designated T-ratings under maximum load. This validation protects against ignition of ambient gases or dusts.
Our certifications include CCC, Ex certificate, IECEx, ATEX, ISO 9001, HSE, TÜV, and BV. These credentials demonstrate compliance with regional and international safety standards. We maintain complete documentation supporting certification claims, ensuring your regulatory audits proceed smoothly.
Customization Capabilities for Your Specific Needs
No two facilities share identical requirements. Our engineering team provides flexible customization matching your operational parameters.
Voltage and power specifications adapt to your electrical infrastructure. Whether you operate on 220V single-phase, 380V three-phase, or specialized 660V systems, we configure distribution circuits accordingly.
Circuit quantity and layout reflect your equipment arrangement. From simple three-circuit designs to complex 20+ circuit configurations, we optimize internal layout for your specific distribution needs.
Enclosure dimensions match your installation space constraints. Custom height, width, and depth specifications ensure proper fit in existing facilities or new construction projects.
Material selection balances performance requirements with budget considerations. Carbon steel with powder coating offers cost-effective protection for moderate environments. Stainless steel 316L provides maximum corrosion resistance for chemical or marine applications.
Component brand preferences accommodate your maintenance standardization. We source components from reputable international brands like Schneider, Siemens, or ABB, as well as high-quality domestic alternatives that reduce costs while maintaining reliability.
Production lead times support your project schedule. In-stock standard configurations ship within 3 days. Customized orders deliver within 15 days from specification approval.
Q: What distinguishes Ex d from Ex e protection methods?
A: Ex d (flameproof) cabinets contain internal explosions, preventing flame propagation to external atmospheres. Ex e (increased safety) prevents spark generation through enhanced component quality and insulation. Your environment's classification determines which protection type suits your application.
Q: Can we modify cable entries after installation?
A: No. Field modifications void certification and compromise safety. All cable entries must be factory-drilled with certified explosion-proof glands. Our team works with you during specification to ensure adequate entry points for your wiring requirements.
Q: How do we select the appropriate T-rating?
A: Your T-rating must remain below the auto-ignition temperature of gases present in your environment. For example, if working with materials igniting at 135°C, specify T4 (135°C max). For lower ignition temperatures, T6 rating (85°C max) provides necessary protection.
Q: What maintenance schedule should we follow?
A: Annual inspections are mandatory for continued safety certification. Examination includes flamepath surface condition, gasket integrity, cable gland tightness, and internal component condition. We provide detailed maintenance checklists with every cabinet delivery.
Q: Is stainless steel always superior to aluminum construction?
A: Material selection depends on your specific environment. Stainless steel 316L excels in highly corrosive chemical or marine settings. Aluminum offers excellent thermal conductivity for heat dissipation and costs less for moderate corrosion environments. Our engineers help you evaluate which material optimizes your performance and budget requirements.
Q: Do these cabinets integrate with existing control systems?
A: Yes. Our units accommodate standard industrial protocols. We configure terminals and connections to interface with your PLCs, SCADA systems, or manual controls according to your electrical drawings.
Zhongcheng Machinery brings three decades of manufacturing excellence to meet your demands for Explosion-proof Distribution Cabinet. Contact our team at oliver@zcgukong.com to discuss your specific requirements and receive detailed technical specifications tailored to your facility.
February 28, 2024
Anonymous, On-site Drilling Engineer, Domestic Oilfield Operator
Zhongcheng’s mud circulation system has been running continuously at our Xinjiang desert site for 8 months, with no major breakdowns or costly operational halts. Its solid build and wear-resistant components have helped keep our maintenance and repair costs in check. In the harsh downhole conditions here, its durability reliably meets our daily operational needs.
January 15, 2025
Anonymous, Technical Project Lead, International Oilfield Service Provider
We had an urgent need for a custom mud zero-discharge system for a coalbed methane project, and Zhongcheng delivered. Their engineering team locked in the designand shipped the full system in 45 days, and it integrated perfectly with our existing ZJ50 rig. On-site commissioning even finished ahead of schedule. Their technical know-how and speed are exactly what we need for time-sensitive projects.
February 28, 2024
Anonymous, On-site Drilling Engineer, Domestic Oilfield Operator
Zhongcheng’s mud circulation system has been running continuously at our Xinjiang desert site for 8 months, with no major breakdowns or costly operational halts. Its solid build and wear-resistant components have helped keep our maintenance and repair costs in check. In the harsh downhole conditions here, its durability reliably meets our daily operational needs.
January 15, 2025
Anonymous, Technical Project Lead, International Oilfield Service Provider
We had an urgent need for a custom mud zero-discharge system for a coalbed methane project, and Zhongcheng delivered. Their engineering team locked in the designand shipped the full system in 45 days, and it integrated perfectly with our existing ZJ50 rig. On-site commissioning even finished ahead of schedule. Their technical know-how and speed are exactly what we need for time-sensitive projects.
