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Large Oil Immersed Power Transformers Copper CTC from China Suppliers & Factory - High Efficiency, Low Eddy Loss
Production Scope
🔹 CTC strips: 5–80 (odd or even)
🔹 Max overall dimension: Height: 120mm | Width: 26mm (tolerance ±0.05mm)
🔹 Dimension of enameled wire:
Single conductor — Thickness a: 0.90–3.15mm (tolerance ±0.01mm)
Width b: 2.50–13.00mm (tolerance ±0.01mm)
🔹 Suggested width/thickness ratio of single conductor: 2.0 < b/a < 9.0
🔹 Suggested thickness of enamel insulation: 0.08–0.12mm
🔹 Thickness of bondable epoxy resin: 0.03–0.05mm
Product Scope
- Polyvinyl acetal enameled CTC with paper insulation
- Polyvinyl-adhesive acetal enameled CTC with paper insulation
- Polyvinyl-adhesive acetal semi-hard acetal enameled CTC with paper insulation
- Polyvinyl acetal enameled CTC with special binded
- Composite CTC with step
- Composite CTC with screen wire inside
- Polyesterimide enameled CTC
- Polyvinyl alcohol enameled CTC with PET film insulation
Product Description
| Number of strips | 7–49 |
| Single dimension | Thickness of conductor a: 1.00–3.15mm | Width of conductor b: 3.00–12.50mm |
| Suggested ratio of width and thickness | 2.5 < b/a < 7.5 |
| Please contact us if your dimension is out of above range — Insulation layers | 24 layers at one time |
| Max thickness of CTC | 80mm (excluding insulation) |
| Max width | 26mm (excluding insulation) |
| Max. Height of CTC bundles | 80mm (excluding paper insulation) |
| Max. Width of CTC bundles | 26mm (excluding paper insulation) |
Frequently Asked Questions (FAQ)
Q
What is the maximum number of CTC strips available?
Our CTC strips range from 5 to 80 strips, available in both odd and even configurations to meet various transformer winding requirements.
Q
What are the dimensional tolerances for CTC enameled wire?
The single conductor thickness (a) and width (b) both carry a tolerance of ±0.01mm. The overall CTC dimension tolerance is ±0.05mm for both height and width.
Q
What is the recommended width-to-thickness ratio for the single conductor?
The suggested width/thickness ratio (b/a) for the single conductor in the production scope is 2.0 < b/a < 9.0. For the product description specification, the ratio is 2.5 < b/a < 7.5. Please contact us if your requirements fall outside these ranges.
Q
What types of insulation are available for CTC products?
We offer a wide range of insulation types including paper insulation, PET film insulation, special bonded insulation, and bondable epoxy resin coating. Products include polyvinyl acetal, polyvinyl-adhesive acetal, polyesterimide enameled CTC, and more.
Q
What is the maximum overall size of a CTC bundle?
The maximum height of a CTC bundle is 80mm and the maximum width is 26mm, both measured excluding paper insulation. The overall CTC dimension limit is 120mm height and 26mm width including all tolerances.
Q
Do you offer composite CTC products with special structures?
Yes. We manufacture Composite CTC with step structure and Composite CTC with screen wire inside, in addition to standard polyvinyl acetal and polyesterimide enameled CTC variants, catering to specialized transformer design needs.