Continuous transposed cable, commonly referred to as CTC, is made by taking a specified number of enameled flat magnet wire strands, and “braiding” them in two rows so that each strand can be of the same exact length. The resulting “braid” is then covered in the required insulating material, usually paper. It is mostly used in the windings of large-scale power transformers.
Libo manufactures CTC with a variety of enamel coatings, and can produce CTC that contains as little as five strands, and as many as forty- seven strands. All CTC is produced to strict customer requirements and specifications.
Product Scope:
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Number of Wires
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5~81（Odd-numbered List）
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Dimension for Single Wire（mm）
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Thickness：a:1.00~3.15
Width：b:3.00~12.5
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Recommended Ratio of Conductor Width
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2.5＜b/a＜7.5
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Product Performance and Parameter：
(1) Thickness Deviation of Paper Insulation of Transposed Conductor
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Insulation Nominal△(mm)
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Deviation (mm)
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0.45 , 0.6
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±0.06
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0.75, 0.95
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±0.08
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1.20, 1.35, 1.60 , 1.95
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±0.10
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2.45, 2.95
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±0.12
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(2) Pitch of Transposition：P
Simulating Formula for Pitch of Transposition ：P=D×π/n或P=8b~14b(can be produced in accordance with customers’ requirements )
(3) Withstanding Voltage
The neighboring lacquer flat wire of transposed conductor should be able to stand 500V DC voltage test without any breakdown in the test.
Executive Standard GB/T6758