CZ0253 Explosion Proof Plugs and Sockets – Reliable Power for Hazardous Environments

The CZ0253 Full Plastic Explosion Proof Plug and Socket is an advanced, safety-engineered electrical solution built to perform in environments where explosive gases or dust are present. Designed for industries such as oil & gas, petrochemical, mining, and hazardous manufacturing, the CZ0253 series ensures uncompromising safety, reliability, and long-term durability.

With international certifications including IECEx, ATEX, and CCC, this explosion-proof device is engineered for global application across the harshest zones — Zone 1, Zone 2 (gas) and Zone 21, Zone 22 (dust).

1. Engineered for Extreme Environments

The CZ0253 plug and socket unit is built to operate in ambient temperatures ranging from -40℃ to +55℃, making it ideal for both frigid and high-heat industrial zones. The high IP65 protection rating ensures it is completely dust-tight and protected against water jets from any direction, providing excellent performance in outdoor or washdown environments.

The product enclosure is made of alloy plastic with static resistance (GRP). This glass-reinforced polyester (GRP) material offers a high strength-to-weight ratio, excellent corrosion resistance, and thermal stability — critical attributes for harsh, flammable, and corrosive environments.

2. Certified Safety – Global Approvals

The CZ0253 plug and socket are designed and tested to meet several critical international standards, ensuring safe operation in explosive atmospheres:

• IECEx Certified (IECEx CQM 10.0002X)
  Ex db eb IIC T6/T5 Gb | Ex tb IIIC T80°C/T95°C Db

• ATEX Certified (Presafe 16 ATEX 8607X)
  II 2GD Ex db eb IIC T6/T5 Gb | Ex tb IIIC T80°C/T95°C Db

• China National Certification (CNEx16.0843)
  Ex d e IIC T6/T5 Gb | Ex tD A21 IP66 T80°C/T95°C

These approvals confirm its safe use in Zone 1 and 2 for gas, and Zone 21 and 22 for dust, making it highly reliable in industries where flammable gases or dust clouds are a risk.

3. Electrical Specifications – Robust and Versatile

The CZ0253 series is designed to handle demanding power needs:

• Rated Voltage:

  • 4 poles — up to 690V AC (50/60Hz)

  • 5 poles — up to 415V AC (50/60Hz)

• Rated Current: 63A

• Rated Switch Capacity: AC-3 690V / 63A

• Auxiliary Switch: AC 250V / 5A

This makes the CZ0253 ideal for powering large equipment, motors, control panels, or mobile machinery in potentially explosive locations.

The unit also includes auxiliary contacts and terminals suited for control circuits, enhancing its utility for industrial automation and remote signaling applications.

4. Design Features – Safety and Efficiency Built In

The CZ0253 is built for ease of use and long operational life while ensuring maximum safety:

• Self-cleaning inserting sleeve:
  Minimizes contact resistance and ensures reliable current flow over time.

• Low insertion and pulling force:
  Easy to connect and disconnect, improving usability while maintaining contact integrity.

• Protective covers:
  Keep the internal terminals secure and clean, increasing the device’s IP protection.

• Standardized Cable Entry:

  • Wall Type Socket:

    • 1 × M50 × 1.5 thread

    • Supports cable diameter Φ22 – 35mm

  • Plug:

    • Supports cable diameter Φ15 – 35mm

• Terminals:

  • Wall socket: 2 × 16mm²

  • Plug: 1 × 16mm²

  • Auxiliary contact: 2 × 2.5/4mm²

These features make installation simple and provide flexibility with various certified cable glands.

5. Application Scope – Where Safety is Non-Negotiable

Thanks to its wide operating range and certified protection, the CZ0253 is perfectly suited for:

• Oil and gas refineries

• Chemical and petrochemical plants

• Mining operations

• Paint shops and spray booths

• Food processing plants (dust-prone areas)

• Pharmaceutical factories

• Heavy manufacturing plants

In any facility where flammable gases (hydrocarbons, solvents, hydrogen) or combustible dust (grain, sugar, wood, or metal powders) may accumulate, the CZ0253 plug and socket offers peace of mind and dependable performance.

6. Dual Functionality – Plug & Socket Combo for Flexible Integration

Available in both 4-pole and 5-pole configurations, the CZ0253 system is capable of handling both power and control connections simultaneously. The unit can be installed as:

• Wall-mounted socket outlets

• Mobile plug connectors

This versatility allows the CZ0253 to serve a wide range of fixed and portable electrical equipment in explosive zones.

7. Maintenance-Free and Long-Lasting

The use of anti-static GRP and IP65 sealing ensures that the unit can withstand environmental wear, dust ingress, and corrosion. The self-cleaning design further reduces maintenance requirements, making the CZ0253 a cost-effective choice over its lifetime.