0102030405
China Factory Suppliers of Large Oil Immersed Power Transformer Continuously Transposed Conductors (CTC)
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 |
| Note | Please connect 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
What is the maximum number of strips available for CTC wire?
Our CTC (Continuously Transposed Cable) supports 5 to 80 strips, available in both odd and even configurations, offering flexibility for a wide range of transformer applications.
What are the dimensional tolerances for the CTC enameled wire?
The single conductor thickness ranges from 0.90 to 3.15mm with a tolerance of ±0.01mm, and the width ranges from 2.50 to 13.00mm with the same tolerance of ±0.01mm. The overall height tolerance is ±0.05mm.
What types of insulation are available for CTC products?
We offer a variety of insulation types including paper insulation, PET film insulation, special binded insulation, and bondable epoxy resin coating, depending on the specific CTC product type selected.
What is the recommended width-to-thickness ratio for the single conductor?
The suggested width-to-thickness ratio (b/a) for the single conductor is between 2.0 and 9.0 for production scope, and between 2.5 and 7.5 for standard product specifications. If your dimension falls outside this range, please contact us for a custom solution.
What is the maximum CTC bundle dimension that can be produced?
The maximum height of CTC bundles is 80mm (excluding paper insulation), and the maximum width is 26mm (excluding paper insulation). For the overall dimension including insulation, the max height is 120mm and max width is 26mm.
What types of CTC products are available for transformer manufacturing?
We offer a comprehensive range of CTC products including Polyvinyl acetal enameled CTC, Polyvinyl-adhesive acetal enameled CTC, Polyesterimide enameled CTC, Composite CTC with step, Composite CTC with screen wire inside, and more, to meet diverse transformer design requirements.

