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Continuously Transposed Cable (CTC)

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FEATURES AND BENEFITS
  • Competitive Lead Times
  • Exceptional Quality
  • Personal Customer Service
  • Long Industry History
  • Flexible Capability
  • Design Experience
  • Best-in-class clean room manufacturing environment
Standard Construction
Individual strands are ETP copper magnet wire conforming to ASTM B-48-68. Each strand is insulated with heavy build Formvar (modifed polyvinyl formal) enamel insulation conforming to NEMA and IEC standards.
Optional Construction
Cold work hardened strands and anneal resistant DCDA 11400 silver bearing copper strands. Self bonding \\\\\\\"B\\\\\\\" staged epoxy coating over the enamel insulation. Nomex covered and paperless CTC.
Outer Covering
An outer covering of insulated tapes or polyester netting is applied over the transposed conductors to provide mechanical and dielectric strength. These are normally applied with a butt lap and are registered approximately 30% over the previous layer. The top two tapes are normally applied with a butt intercalated lap of 50%.
Standard Insulation
0.003\\\\\\\" (0.076 mm) thermally upgraded creped kraft paper.

Design Limits (English)

Individual Strands Soft ETP Cu Work Hardened  Silver Bearing
Min Number 5 5 5
Max Number 79 79 79
Min Thickness (in) 0.040 0.040 0.040
Max Thickness (in) 0.120 0.120 0.120
Min Width (in) 0.120 0.120 0.120
Max Width (in) 0.590 0.590 0.358
Min Ratio 1.5 to 1 1.51 to 1 1.9 to 1
Max Ratio 7.0 to 1 7.0 to 1 6.5 to 1

Design Limits (Metric)

Individual Strands Soft ETP Cu Work Hardened  Silver Bearing
Min Number 5 5 5
Max Number 79 79 79
Min Thickness (mm) 1.01 1.01 1.01
Max Thickness (mm) 3.05 3.05 3.05
Min Width (mm) 3.05 3.05 3.05
Max Width (mm) 12.5 12.5 8.89
Min Ratio 1.5 to 1 1.51 to 1 1.9 to 1
Max Ratio 7.0 to 1 7.0 to 1 6.5 to 1

CTC_diagram

Standard Package Options

Flange Diameter Barrell Diameter Traverse Width Overall Width
in mm in mm in mm in mm
72 1829 48 1219 36 914 42.5 1080
60 1524 36 914 32 813 38.5 978
60 1524 36 914 24 610 30.5 775
60 1524 36 914 12 305 18.5 470
48 1219 24 610 24 610 30.5 775
48 1219 24 610 8.75 222 15.3 387
Arbor Diameter Drive Hole Location Drive Hole Diameter Approximate Capacity
in mm in mm in mm lbs kg
5 127 10 254 2.5 64 13,500 6,124
5 127 10 254 2.5 64 9,600 4,355
5 127 10 254 2.5 64 7,200 3,266
5 127 10 254 2.5 64 3,600 1,633
5 127 10 254 2 51 5,400 2,449
5 127 10 254 2 51 1,900 862

 

CTC_ReelCTC_Reel_Spec

Metric (mm) Standard (in)
Dimension Description Dimension Description
1.3 Min Conductor Thickness 0.050 Min Conductor Thickness
3.2 Max Conductor Thickness 0.125 Max Conductor Thickness
3.0 Min Conductor Width 0.120 Min Conductor Width
11.9 Max Conductor Width 0.470 Max Conductor Width
24 Max Axial of Bundle 0.940 Max Axial of Bundle
100 Max Radial of Bundle 3.940 Max Radial of Bundle
79 Max # Strands 79 Max # Strands
CTC Height to Width Ratio Capability
Conductor Width (mm) With Paper Covering Max Ratio Paperless Max Ratio Conductor Width (in) With Paper Covering Max Ratio Paperless Max Ratio
3.0 – 3.5 3.75 4.00 0.120 – 0.139 3.75 4.00
3.6 – 4.3 4.00 4.25 0.140 – 0.169 4.00 4.25
4.3 – 4.8 4.25 4.63 0.170 – 0.189 4.25 4.63
4.8 – 5.6 4.50 5.00 0.190 – 0.219 4.50 5.00
5.6 – 6.3 4.75 5.25 0.220 – 0.249 4.75 5.25
6.4 – 7.1 5.00 5.50 0.250 – 0.279 5.00 5.50
7.1 – 7.8 5.25 5.75 0.280 – 0.309 5.25 5.75
7.9 – 8.6 5.50 6.00 0.310 – 0.340 5.50 6.00
CTC K Factor Minimum: Shortest Measured Pitch Lengh = 35 mm

(Review width, thickness and mm^2, and largest aspect ratio will be the minimum capability for the cable)

Pitch Factor by Thickness (mm) Pitch Factor by Width (mm) Pitch Factor by mm^2
1.3 – 1.4 6.00 3.0 – 3.6 12.00 3.9 – 4.8 7.75
1.4 – 1.5 6.00 3.6 – 4.1 6.00 4.9 -6.0 7.45
1.5 – 1.6 6.05 4.1 – 4.6 6.05 6.1 – 7.2 7.15
1.6 – 1.7 6.10 4.6 – 5.1 6.10 7.3 – 8.6 6.85
1.7 – 1.8 6.10 5.1 – 5.6 6.10 8.7 – 10.0 6.60
1.8 – 1.9 6.50 5.6 – 6.1 6.50 10.1 – 11.6 6.40
1.9 – 2.0 6.30 6.1 – 6.6 6.30 11.7 – 13.3 6.20
2.0 – 2.1 6.35 6.6 – 7.1 6.35 13.4 – 15.1 6.10
2.1 – 2.2 6.40 7.1 – 7.6 6.40 15.2 – 17.0 6.00
2.2 – 2.3 6.50 7.6 – 8.1 6.50 17.1 – 19.0 6.00
2.3 – 2.4 6.60 8.2 – 8.6 6.60 19.1 – 21.1 6.10
2.4 – 2.5 6.70 8.7 – 9.1 6.70 21.2 – 23.3 6.20
2.6 – 2.6 6.80 9.2 – 9.7 6.80 23.4 – 25.6 6.40
2.7 – 2.7 6.95 9.7 – 10.2 6.95 25.7 – 28.0 6.60
2.8 – 2.8 7.10 10.2 – 10.7 7.10 28.1 – 30.6 6.85
2.9 – 3.0 7.25 10.7 – 11.2 7.25 30.7 – 33.2 7.15
3.0 – 3.1 7.50 11.2 – 11.7 7.50 33.3 – 36.0 7.45
3.1 – 3.2 7.75 11.7 – 11.9 7.75 36.1 – 37.9 7.80

Charts apply to all Copper at 210 N/MM^2 yield and less. Please inquire for Silver Bearing Copper.

CTC K Factor Minimum: Shortest Measured Pitch Lengh = 1.38 in

(Review width, thickness and SQML, and largest aspect ratio will be the minimum capability for the cable)

Pitch Factor by Thickness (in) Pitch Factor by Width (in) Pitch Factor by SQML
0.050 – 0.053 6.00 0.120 – 0.140 12.00 6,000 – 7,599 7.75
0.054 – 0.057 6.00 0.141 – 0.160 6.00 7,600 – 9,399 7.45
0.058 – 0.062 6.05 0.161 – 0.180 6.05 9,400 – 11,299 7.15
0.063 – 0.066 6.10 0.181 – 0.200 6.10 11,300 – 13,399 6.85
0.067 – 0.070 6.10 0.201 – 0.220 6.10 13,400 – 15,699 6.60
0.071 – 0.074 6.50 0.221 – 0.240 6.50 15,700 – 18,099 6.40
0.075 – 0.078 6.30 0.241 – 0.260 6.30 18,100 – 20,699 6.20
0.079 – 0.083 6.35 0.261 – 0.280 6.35 20,700 – 23,499 6.10
0.084 – 0.087 6.40 0.281 – 0.300 6.40 23,500 – 26,399 6.00
0.088 – 0.091 6.50 0.301 – 0.320 6.50 26,400 – 29,499 6.00
0.092 – 0.095 6.60 0.321 – 0.340 6.60 29,500 – 32,799 6.10
0.096 – 0.099 6.70 0.341 – 0.360 6.70 32,800 – 36,199 6.20
0.100 – 0.104 6.80 0.361 – 0.380 6.80 36,200 – 39,899 6.40
0.105 – 0.108 6.95 0.381 – 0.400 6.95 39,900 – 43,599 6.60
0.109 – 0.112 7.10 0.401 – 0.420 7.10 43,600 – 47,599 6.85
0.113 – 0.116 7.25 0.421 – 0.440 7.25 47,600 – 51,699 7.15
0.117 – 0.120 7.50 0.441 – 0.460 7.50 51,700 – 55,999 7.45
0.121 – 0.125 7.75 0.461 – 0.470 7.75 56,000 – 58,570 7.80

Charts apply to all Copper at 210 N/MM^2 yield and less. Please inquire for Silver Bearing Copper.