Aluminum-copper Connection: Bimetallic Terminals Make On-site Installation Twice As Efficient
Connecting aluminum cables to copper equipment creates a high risk of galvanic corrosion, leading to joint failures and costly downtime. Overheating often occurs at these terminal connection points during the power distribution upgrade process of industrial facilities. Utilizing heavy-duty bimetallic terminal blocks solves this transition problem by providing a secure, reliable interface that eliminates field installation bottlenecks.
Preventing Galvanic Corrosion in Electrical Systems
When dissimilar metals contact each other in the presence of moisture, an electrochemical reaction triggers rapid corrosion. This degradation increases electrical resistance, generating dangerous levels of localized heat. Transition connectors solve this safety hazard by connecting aluminum and copper components together through friction welding, eliminating internal gaps and preventing moisture infiltration.
Main Advantages
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Oxidation Barriers: Pre-filled contact paste inside the barrel breaks down surface oxides automatically.
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Long-Term Stability: Coefficient of thermal expansion mismatches are safely managed within the connector body.
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Labor Savings: Field crews report up to a 40% reduction in termination time compared to standard methods.
Technical Specifications for Standard Transitions
Selecting the appropriate connector requires matching the specific cable cross-section with the equipment interface requirements. The following data outlines standard engineering specifications for industrial deployments:
| Rated Voltage (kV) | Aluminum Cable Size (mm²) | Copper Pin Diameter (mm) | Tightening Torque (Nm) |
|---|---|---|---|
| 1.2 | 50 | 10 | 12 |
| 1.2 | 95 | 12 | 22 |
| 1.2 | 150 | 14 | 35 |
Installation Practice
Achieving a low-resistance connection requires strict adherence to preparation protocols during field assembly. Technicians must strip the aluminum cable insulation cleanly without scoring the inner conductors. Immediately after stripping, brushing the bare strands removes the transparent oxide film before inserting the wire into the bi metal cable lug.
Crimping Guide
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Remove outer insulation and wire-brush the exposed conductor surface thoroughly.
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Apply the correct hexagonal crimping dies to the heavy-duty bimetallic lugs.
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Torque the copper palm side directly to the switchgear terminal utilizing a calibrated wrench.
Consistently deploying these rugged bi metal lugs connectors eliminates hot spots, stabilizes voltage drops, and guarantees an airtight termination that survives harsh industrial environments.
