T2 Copper Busbar for Transformers - High Conductivity, Custom Fabrication by China Suppliers and Factory
The Technical Specification for Copper Busbar
| Parameter Item | Parameter Value |
|---|---|
| Material Grade | T2 (TMY Copper Busbar) |
| Copper Purity | ≥99.95% |
| Electrical Conductivity (20℃) | ≥58.5 MS/m (97% IACS) |
| Tensile Strength (Hard Temper) | ≥295 MPa |
| Elongation (Soft Temper) | ≥40% |
| Tin Coating Thickness (Tin-Plated Type) | 5–10 μm (15μm customizable) |
| Standard Sizes (Width × Thickness) | 30×3, 40×4, 50×5, 60×6, 80×8, 100×10 mm; Length customizable (3m / 6m / custom) |
| Insulation Class Compatibility | Class F (155℃), Class H (180℃) |
| Contact Resistance (After Crimping) | ≤10 μΩ |
| Executive Standard | GB/T 5585.1-2019, IEC 60228 |
Selection Guide & Installation Recommendations
01
Specification Calculation
Determine the cross-section based on rated current, ambient temperature, and cooling method. Reduce current-carrying capacity by 10–15% for dry/closed environments. Example: 1000A usually uses 60×6 mm (360 mm²) busbar.
02
Surface Treatment Selection
Bare copper for indoor dry environments; tin-plated (preferred) for humid / outdoor / coastal areas; silver-plated for high-frequency and precision applications.
03
Customization Process
Provide drawings / current / transformer model → Quotation → Confirm process → Production → Quality inspection → Delivery.
Application Scenarios
Oil-immersed / Dry-type Transformers
Low-voltage lead-out busbars, winding lead-out wires, neutral point connections, and grounding busbars.
Low-voltage lead-out busbars, winding lead-out wires, neutral point connections, and grounding busbars.
Box-type Substations (European / American Style)
Connection between high-low voltage cabinets and transformers for long-term outdoor operation.
Connection between high-low voltage cabinets and transformers for long-term outdoor operation.
PV / Wind Power Transformers
High-current busbars for inverter side, withstanding high frequency and inrush current.
High-current busbars for inverter side, withstanding high frequency and inrush current.
Industrial Special Transformers
Kiloampere-level DC busbars for smelting and electrolysis transformers.
Kiloampere-level DC busbars for smelting and electrolysis transformers.
Package & Shipment For The Copper Busbar
Frequently Asked Questions (FAQ)
Q
What is the difference between T2 copper busbar and ordinary copper busbar?
T2 copper busbar is made from high-purity electrolytic copper with a copper content of ≥99.95%. Compared to ordinary copper, it offers significantly higher electrical conductivity (≥97% IACS), lower resistivity, and better ductility — making it the preferred choice for transformer and power distribution applications.
Q
How do I select the right busbar size for my transformer?
Selection is based on rated current, ambient temperature, and installation environment. As a general reference, a 1000A load typically uses a 60×6 mm (360 mm²) busbar. For enclosed or high-temperature environments, reduce the rated current-carrying capacity by 10–15%. Please provide your transformer model and current rating for a precise recommendation.
Q
What surface treatments are available, and which should I choose?
We offer three surface treatment options: bare copper (suitable for indoor dry environments), tin-plated (recommended for humid, outdoor, or coastal environments), and silver-plated (ideal for high-frequency or precision applications). Tin-plated busbars are the most commonly ordered option due to their excellent corrosion resistance and cost-effectiveness.
Q
Can the busbar be customized in length, size, or shape?
Yes. We support full customization including non-standard widths, thicknesses, lengths (standard 3m/6m or custom), punching, bending, and special surface treatments. Simply provide your drawings, current requirements, or transformer model, and our team will process a tailored quotation.
Q
What quality standards does your T2 copper busbar comply with?
Our T2 copper busbars are manufactured in accordance with GB/T 5585.1-2019 (Chinese national standard) and IEC 60228 (international standard). Each batch undergoes strict quality inspections including conductivity testing, dimensional verification, surface inspection, and mechanical property testing before shipment.
Q
How is the copper busbar packaged and shipped to ensure safe delivery?
Busbars are carefully bundled, wrapped with protective film, and packed in wooden crates or steel frames depending on quantity and destination. We support sea freight, air freight, and express delivery worldwide. Export packaging is available for all international orders to ensure the product arrives in perfect condition.