Cu-Al Transition Busbar for Wind Power - Reliable Connectors from China Suppliers & Factory for 1.5MW to 15MW Turbines
The Core Advantage for Cu-Al Transition Busbar
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Anti-Corrosion & Longevity
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Excellent Conductivity & Low Energy Loss
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High Mechanical Strength & Stability
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Easy Installation & Wide Compatibility
The Technical Specifications For Cu-Al Transition Busbar
| Parameter Category | Technical Data |
|---|---|
| Matched with the fan power | 1.5MW - 15MW (Land-based / Offshore) |
| Applicable voltage level | 0.69kV - 35kV |
| Rated current | 500A - 3000A |
| Rated short-term withstand current (4S) | 25kA、31.5kA、40kA、50kA |
| Contact resistance | ≤ 50μΩ (initial value) |
| Working temperature | -40℃ ~ 150℃ |
| Connection method | Screw fixation |
| Material combination | Purple copper (T2) + Pure aluminum (1060) |
| Surface treatment | Tinned / Silver-coated (optional) |
The Application For Cu-Al Transition Busbar
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1. Internal connections of wind turbine generator cabins
- Transition connection between generator stator/rotor copper terminals and the aluminum busbar of the cabin (suitable for doubly-fed and direct-drive generators)
- Connection between copper components in the cabin control cabinet and the aluminum busbar (such as the wiring terminals of frequency converters and contactors)
- Copper-aluminum connection between slip ring boxes and the cabin power distribution system (able to withstand the rotating vibration environment of the wind turbine)
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2. Connection of box-type transformers (box transformers)
- Transition connection between the copper bushings on the high-voltage side (10kV–35kV) of the box transformer and the aluminum busbar
- Connection between the copper terminals on the generator side of the low-voltage side (0.69kV) and the aluminum busbar of the box transformer
- Transition connection of copper-aluminum wiring terminals for internal components such as transformers and lightning arresters in the box transformer
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3. Connection of combiner boxes / inverters
- Connection between the copper terminals in the combiner box and the aluminum busbar of the combiner box in photovoltaic-wind hybrid projects
- Transition connection between the copper terminals at the input/output of the inverter and the aluminum busbar (suitable for high current and high-frequency start-stop scenarios)
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4. Connection of step-up stations / collection lines
- Transition connection between the copper busbar of the switch cabinet in the wind farm step-up station and the aluminum collection line
- Transition connection between the aluminum collection line and the copper busbar bridge when multiple wind turbines operate in parallel
- Terminal connection between the submarine cables (copper core) of the offshore wind farm and the aluminum busbar of the land-based step-up station
Package & Shipping
Frequently Asked Questions (FAQ)
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What is a Cu-Al Transition Busbar and why is it needed?
A Cu-Al Transition Busbar is a specialized electrical connector that bridges copper and aluminum conductors. It is needed because direct contact between copper and aluminum causes galvanic corrosion, which increases resistance and creates safety hazards. The transition busbar eliminates this issue while maintaining excellent electrical conductivity.
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What voltage and current ratings are available for the Cu-Al Transition Busbar?
The Cu-Al Transition Busbar supports applicable voltage levels from 0.69kV to 35kV and rated currents ranging from 500A to 3000A, making it suitable for a wide range of wind power and industrial applications.
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What materials are used in the Cu-Al Transition Busbar?
The busbar is manufactured using Purple Copper (T2) and Pure Aluminum (1060). These high-purity materials ensure excellent electrical conductivity, mechanical strength, and long-term reliability. Surface treatment options include tinned or silver-coated finishes for enhanced corrosion resistance.
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Is the Cu-Al Transition Busbar suitable for offshore wind farm environments?
Yes. The Cu-Al Transition Busbar is designed to operate in a wide temperature range of -40℃ to 150℃ and is compatible with wind turbines ranging from 1.5MW to 15MW, including both land-based and offshore installations. Its anti-corrosion properties make it particularly well-suited for harsh offshore environments.
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How is the Cu-Al Transition Busbar installed?
The Cu-Al Transition Busbar uses a screw fixation connection method, which ensures a secure, stable, and easily maintainable installation. This straightforward approach allows for quick deployment and wide compatibility with various electrical system configurations.
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What short-circuit withstand capacity does the Cu-Al Transition Busbar support?
The busbar supports rated short-term withstand currents (4S) of 25kA, 31.5kA, 40kA, and 50kA, providing robust protection under fault conditions. The initial contact resistance is ≤ 50μΩ, ensuring minimal energy loss during normal operation.