bare overhead cables

An economical choice for outdoor high-voltage power transmission, utilizing air as the insulating medium: bare conductors.
1.Minimalist Structure: Devoid of insulation layers or protective sheathing, consisting solely of stranded metal conductors (e.g., Aluminum Conductor Steel Reinforced, ACSR).
2.Typical Applications: High-voltage transmission lines, rural power grid upgrades, river-crossing transmission projects, and electrified railway catenary systems.
Product Description
Details

Bare Overhead Cables: Professional Power Transmission Solutions 

At Xuzhou Tuojie International Trade Co., Ltd., we deliver bare overhead cables engineered for reliable outdoor power transmission. Our conductors feature aluminum and steel-reinforced configurations that achieve superior electrical performance across varied applications. Backed by 15 senior engineers, over 30 intermediate technicians, and 18 patents, we manufacture transmission solutions handling 100A to 2000A ampacity ratings. Our production facility operates 120+ sets of advanced machinery, including CNC automatic winding equipment and microcomputer-controlled curing systems. Every cable undergoes strict ISO9001-compliant quality inspection—from raw material verification through final delivery—ensuring dimensional accuracy within ±2% and conductivity tolerance of ±3%. We provide comprehensive power distribution solutions tailored to your project requirements.

What Are Bare Overhead Cables?

These uninsulated electrical conductors transmit power between substations and distribution points without external covering. You'll find them constructed from aluminum, copper, or aluminum conductor steel reinforced (ACSR) strands.

The design uses air as the natural insulating medium. This approach eliminates insulation layers while maintaining safe operation in outdoor environments.

They solve critical infrastructure challenges you face daily. Cost-effective long-distance transmission becomes achievable. Installation complexity decreases compared to underground systems. Maintenance access improves significantly.

Heat dissipation happens naturally through air cooling. This prevents overheating during peak load conditions. Your maintenance teams can perform routine inspections easily. Emergency repairs happen faster with overhead accessibility.

WIRES AND CABLE

Technical Specifications

Our cables meet international standards including IEC 61089, ASTM B231, and BS 215. Here's what you get:

Parameter Specification Standard
Conductor Diameter 6mm - 50mm IEC 61089
Tensile Strength 160-310 MPa ASTM B231
Aluminum Purity 99.5-99.7% BS 215
Electrical Conductivity 61-63% IACS IEC 60228
Ampacity Rating 100A - 2000A IEEE 738
Operating Temperature -40°C to +90°C IEC 61089
Weight per Unit 0.1 - 3.5 kg/km/mm² ASTM B232
Conductivity Tolerance ±3% IEC 60889
Dimensional Accuracy ±2% ASTM B231

All products hold National CCC Mandatory Certification. Our quality inspection laboratory verifies each specification through standardized testing protocols.

Key Advantages That Benefit Your Operations

Efficient Transmission Performance

You'll experience excellent heat dissipation properties. Power loss stays minimal throughout transmission. High electrical conductivity ensures maximum efficiency.

The conductor diameter and strand configuration optimize current flow. Natural air cooling maintains safe operating temperatures. This design delivers consistent performance during high-load periods.

Superior Mechanical Strength

Our steel-reinforced aluminum stranded construction provides exceptional durability. The steel core handles tensile strength requirements. Aluminum strands focus on electrical conduction.

This combination withstands environmental stresses effectively. Ice loading up to 25mm poses no threat. Wind speeds exceeding 150 mph don't compromise structural integrity. Temperature variations from -50°C to +75°C remain within operational parameters.

Economic and Practical Solution

You'll appreciate the low material costs. Installation procedures stay straightforward. Maintenance requirements remain manageable.

Long-distance transmission becomes financially feasible. Large-span installations work without excessive infrastructure. Your total cost of ownership decreases significantly.

Proven Quality Management

We implement strict monitoring across all production stages for bare overhead cables. Raw material procurement starts with certified suppliers. Incoming inspection verifies every specification.

Production processes follow rigorous quality checkpoints. Finished product inspection catches any deviations. Warehousing and delivery maintain product integrity. Our "zero defects" philosophy ensures nothing substandard reaches you.

Certificate

Where You'll Use These Conductors?

Utility-Scale Power Transmission

These cables form the backbone of electrical grids. They span 50-500 kilometers between generation facilities and substations. Operating voltages range from 69kV to 765kV.

Your transmission network handles extreme conditions confidently. Service reliability exceeds 99.9% availability standards. Electromagnetic interference doesn't affect performance.

Industrial Distribution Networks

Manufacturing facilities rely on our conductors for 480V to 35kV distribution. Mining operations benefit from robust construction. Heavy industrial complexes get reliable connections.

Chemically aggressive environments don't degrade performance. Areas requiring frequent reconfiguration adapt easily. Your operations continue without power interruptions.

Rural and Residential Distribution

Remote communities receive electricity through 4kV to 25kV distribution lines. Individual properties connect reliably. Challenging terrains become accessible.

Mountainous regions present no installation barriers. Coastal areas with high salt exposure remain protected. Agricultural zones handle varying seasonal loads effectively.

We've delivered solutions for major projects including Xuzhou Rail Transit Network Control Center and XCMG Group factory upgrades. Our experience spans municipal, commercial, and industrial sectors.

Application areas

FAQ

Q: How do I select the right ampacity rating for my application?

Calculate 125% of your continuous load per NEC requirements. For a 500A continuous load on a 25kV distribution line, you need minimum 625A ampacity. This typically requires 4/0 AWG ACSR conductor. Use IEEE 738 ampacity calculations. Factor in ambient temperature, wind speed, and solar radiation.

Q: What determines proper sag and tension values?

Apply the catenary equation with your conductor weight in kg/m. Include ice loading (typically 6-25mm). Add wind pressure (390-780 Pa). Consider your temperature range (-40°C to +75°C). Follow IEC 61597 sag-tension calculation methods. Use safety factors of 2.5-3.0 for ultimate tensile strength.

Q: Which tests verify conductor quality upon delivery?

Conduct DC resistance testing per IEC 61089. Verify dimensions with ±1.5% tolerance. Perform tensile strength testing achieving minimum rated breaking load. Review material certification confirming aluminum purity ≥99.5%. Check steel core galvanizing quality per ASTM A475.

Q: How do I assess conductor condition after years of service?

Perform visual inspection for corrosion and strand breakage. Look for bird or lightning damage. Conduct thermographic analysis identifying hot spots. Measure sag increases indicating reduced tension. Sample conductor sections for tensile strength testing. Compare results to original specifications per IEEE 1185 guidelines.

Q: What factors matter for coastal installations?

Salt spray corrosion requires aluminum-clad steel core or specialized alloys. UV radiation affects surface oxidation. High humidity impacts galvanic corrosion. Wind loading from coastal weather needs consideration. Choose ASTM B711 aluminum-clad conductors. Validate through ASTM B117 salt spray testing.

Q: Can you customize specifications for special requirements?

Absolutely. We provide tailored solutions for diverse environmental conditions. Our technical team evaluates your specific parameters. We adjust conductor configurations to match your needs. Country-specific requirements receive full consideration.

Why Choose Xuzhou Tuojie International Trade Co., Ltd.?

Our 20+ years of industry experience backs every product. Strong technical capability drives innovation. Advanced production equipment ensures consistency.

We offer comprehensive one-stop power supply solutions. International certifications guarantee reliability and safety. Customer-focused approach means we listen to your requirements.

Our proven track record includes hundreds of key power projects. Municipal engineering, commercial real estate, and industrial sectors trust our solutions. Projects complete on schedule while maintaining high quality standards.

The company's philosophy prioritizes your interests. Technology comes first in our development process. Service remains paramount throughout our relationship. Integrity forms the foundation of every interaction.

PARTNERS

Contact Us for Your Power Transmission Project

Ready to discuss your bare overhead cables requirements? Our team provides expert consultation and customized solutions. Email us at tuojie@electricinchina.com today.

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