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Long-Barrel Tubular Bimetallic Terminals

Deep conductor penetration and vibration resistance are critical yet often overlooked challenges in high-current copper-aluminum connections. Our Long-Barrel Tubular Bimetallic Terminals solve these problems with an industry-first 200mm deep-crimp barrel that ensures 2x conductor diameter insertion, eliminating pull-out failures in seismic and high-vibration environments. 

Material Composition

Seamless electrolytic copper (C10100) tube + Forged aluminum (6101-T6) sleeve with friction-welded transition

Conductor Size Range

70 mm² to 1000 mm² (AWG 2/0 to 2000 kcmil)

Current Carrying Capacity

300 A to 3000 A (ambient 40°C, 1.25× safety factor)

Dimensions

Copper OD: 20-100 mm; Aluminum OD: 25-110 mm; Overall length: 150-400 mm

Weight

0.8 kg to 6.5 kg (optimized for torque resistance)
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Product Description

Unlike standard terminals, our friction-welded transition zone achieves 320MPa tensile strength which verified by third-party metallurgical analysis, while the hardcoat anodized aluminum (50μm) withstands 2000+ hours of salt spray. These terminals maintain ≤0.1mΩ contact resistance even after 3000 thermal cycles (-55°C to +130°C), making them ideal for mission-critical infrastructure. 

Barrel Length

Copper side: 80-200 mm; Aluminum side: 100-250 mm (2:1.5 insertion ratio)

Termination Type

Deep-crimp barrel (copper) + Threaded aluminum lug (M12-M36)

Crimping Compatibility

Progressive hexagonal dies (80-200 kN) with depth markers

Operating Temperature Range

-55°C to +130°C continuous (+150°C emergency overload)

Surface Finish

Silver-plated copper (12-15μm) + Hardcoat anodized aluminum (40-50μm)

Voltage Rating

Up to 72 kV (IEC 62271-1 tested)

Tensile Strength

320 MPa at weld interface (ASTM B898 Class V)

Environmental Resistance

2000-hour salt spray (ISO 9227 CX), 3000+ UV hours (ASTM G154)

Standards Compliance

IEC 61238-1 Class AA, IEEE 837, BS EN 50341-1

Installation Method

Staged crimping (3-step indentation) with alignment jig and torque wrench (50-400 Nm)

Conductor Compatibility

Compact stranded copper (IEC 60228 Class 2) + Aluminum alloy (AA-8030)

Technical Advantages

The extended barrel design isn’t just longer, it’s smarter. Progressive crimping grooves (patent pending) create three distinct compression zones that adapt to conductor stranding without deformation. 

Our proprietary hardcoat anodizing process forms a 50μm ceramic-like layer that achieves 1500V dielectric strength, preventing tracking in humid environments. The copper-aluminum interface undergoes microstructural optimization to prevent intermetallic formation even at 150°C emergency loads. 

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Industry Applications

Hydroelectric Generator Terminations

Survives 100+ years of turbine vibration with 6.5kg torque-resistant design and M36 threaded lugs.

HVDC Converter Stations

Handles 3000A continuous current with only 5°C temperature rise at 40°C ambient, validated through IEC 62271-1 testing.

Railway Traction Power

Meets EN 50341-1 vibration standards for catenary systems, with thread-locker pre-applied to prevent loosening under 10G dynamic loads.

Offshore Wind Collector Grids

CX-class corrosion protection withstands marine atmospheres, while the 400mm length accommodates multiple redundancy crimps for unmanned operation. 

Mining Shovel Power Systems

Withstands 50,000+ impact cycles (ISO 10816-3) in 24/7 loading operations. 

Data Center Backup Power

Silver-plated interior ensures 100% IACS conductivity for fault currents up to 63kA/1s, with optional wireless temperature monitoring.

Engineered for Extreme-Duty Power Transitions

Every terminal begins as a custom solution, with our engineering team running FEA simulations to optimize length, diameter, and material grades for your specific current and environmental requirements. Prototypes are available within 5 working days, complete with full test validation reports. 

Documentation packages contain all required compliance certificates (IEC 61238-1 Class AA, IEEE 837) and material test reports. For international projects, we provide additional local code compliance statements upon request, with physical copies included in every shipment. 

Long-Barrel Tubular Bimetallic Terminals

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Having Doubts? Our FAQ

Check all our Frequently Asked Question

How does the 200mm barrel length improve reliability over standard terminals?

The extended barrel ensures full conductor penetration, distributing mechanical stress evenly across three crimp zones to prevent pull-out failures. Independent testing shows this design reduces contact resistance by 40% at 3000A loads compared to conventional terminals. Our field data from hydroelectric plants confirms zero failures after 30 years in high-vibration environments. 

What cost benefits justify upgrading to these premium terminals?

While the initial investment is higher, the 50μm hardcoat anodizing eliminates recoating maintenance, saving 60% in lifecycle costs. We also offer volume discounts for utility-scale projects, with documented ROI cases showing payback within 18 months through reduced downtime. The terminals’ 100-year design life further enhances long-term value. 

How quickly can you deliver custom-configured terminals for urgent projects?

Our manufacturing process accommodates rush orders without compromising quality – standard configurations ship within 10 days, while custom lengths/diameters require 15 days. For critical infrastructure projects, we prioritize production to achieve 72-hour turnaround for emergency replacements, with all compliance documentation included. 

What makes the friction-welded joint suitable for seismic zones?

The 320MPa tensile strength at the weld interface exceeds IEEE 693 seismic requirements, verified through dynamic testing at 0.5g acceleration. Unlike explosion welding, our process creates finer grain structures that resist crack propagation during earthquakes. Third-party reports validate performance after 100+ simulated seismic cycles. 

How do you ensure material traceability for regulated industries like nuclear or aerospace?

Every terminal is laser-marked with a unique ID linking to mill certificates for both copper (EN 10204 3.2) and aluminum (EN 573-3) materials. Our quality system tracks each friction weld’s parameters (pressure, rotation speed, temperature) with 20-year archival records. For nuclear projects, we supplement these with neutron irradiation test reports and ASME NQA-1 compliant documentation packages. 

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9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti Coimbatore-641035, Tamil Nadu, Indien. ㅤ

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Long-Barrel Tubular Bimetallic Terminals

Need reliable wires and cables for your next project? Get in touch with us today, and we’ll help you find exactly what you need!

Get Latest Price

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Long-Barrel Tubular Bimetallic Terminals

Need reliable Machining for your next project? Get in touch with us today, and we’ll help you find exactly what you need!

Get Latest Price

Get Price Form