0102030405
China Suppliers Factory for Large Oil Immersed Power Transformer Copper Continuously Transposed Conductors (CTC)
Production Scope
CTC Strips
5–80 (odd or even)
Max Overall Dimension
Height: 120mm | Width: 26mm (tolerance ±0.05mm)
Single Conductor Thickness (a)
0.90–3.15mm (tolerance ±0.01mm)
Single Conductor Width (b)
2.50–13.00mm (tolerance ±0.01mm)
Suggested Width/Thickness Ratio (b/a)
2.0 < b/a < 9.0
Enamel Insulation Thickness
0.08–0.12mm
Bondable Epoxy Resin Thickness
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
Specification |
Value |
Number of strips |
7–49 |
Single dimension – Conductor thickness (a) |
1.00–3.15mm |
Single dimension – Conductor width (b) |
3.00–12.50mm |
Suggested ratio of width and thickness |
2.5 < b/a < 7.5 |
Insulation layers (at one time) |
24 |
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) |
Note |
Please contact us if your dimension is out of the above range. |
Frequently Asked Questions
What is the maximum number of CTC strips available in your production scope?
Our production scope supports CTC strips ranging from 5 to 80, accommodating both odd and even strip counts to meet various transformer design requirements.
What are the dimensional tolerances for CTC wire conductors?
The single conductor thickness (a) ranges from 0.90 to 3.15mm with a tolerance of ±0.01mm, and the width (b) ranges from 2.50 to 13.00mm with the same tolerance of ±0.01mm. The maximum overall height is 120mm and width is 26mm, with a tolerance of ±0.05mm.
What types of insulation are available for CTC products?
We offer a wide range of insulation options including paper insulation, PET film insulation, bondable epoxy resin, and special binded configurations. Products include polyvinyl acetal enameled CTC, polyesterimide enameled CTC, and composite CTC variants.
What is the recommended width-to-thickness ratio for single conductors?
For production scope, the suggested width/thickness ratio (b/a) is between 2.0 and 9.0. For the product description specifications, the recommended ratio is between 2.5 and 7.5. If your requirements fall outside these ranges, please contact us directly.
Can you produce CTC with special configurations such as screen wire or step design?
Yes, we manufacture Composite CTC with step and Composite CTC with screen wire inside, in addition to standard CTC types. These special configurations are designed for specific transformer applications requiring enhanced performance.
What is the maximum height and width of CTC bundles?
The maximum height of CTC bundles is 80mm (excluding paper insulation) and the maximum width is 26mm (excluding paper insulation). Up to 24 insulation layers can be applied in a single process. Please contact us if your project requires dimensions beyond these specifications.