Strands: Bunches

Several single wires or bundles are bunched together. Those single wires do not hold a fixed position inside the strand. Their position relative to one another undergoes a permanent change along the entire length of the bunch.


Applications

  • A multitude of applications in cables and conductors
  • Crucial advantage: good efficiency

Particular benefits for our customers

  • Uniform elongation of single wires
  • Low tolerances, even in single wires (even outperforming ASTM)

Manufacturing range

  • Materials: Cu-ETP1 and Cu-OF1
  • Bare, tin-plated, nickel-plated or silver-plated
  • Left-hand lay or right-hand lay
  • Variation: soft annealed
  • Single-wire diameter: ranging from Ø 0.05 mm to Ø 0.51 mm
  • Cross-section: ranging from 0.005 mm2 to 630 mm2

Construction

The construction of a bunch is derived from the cross-section required, which leads to the electrical conductor featuring a certain resistance level. Different cross-sections with the same resistance value can be generated by applying single wires of varying sizes.

Calculator for medium-sized bunches

Bunch diameter 1,00 mm


Calculation of the diameter of a medium-sized bunch

D = d × f

D = diameter of medium-sized bunch
d = diameter of single wire
f = factor, see table
n = no. of wires to determine factor f

Example

n = 16
d = 0.20 mm
f = 4.7

Bunch 16 × 0.20 mm (= 0.50 mm²)

D = 0.20 mm × 4.7
D = 0.94 mm

Number of wires (n) Factor (f)
1 1
2 2
3 2.15
4 2.41
5 2.7
7 3
10 4
12 4.15
14 4.41
16 4.7
19 5
24 6
26/27 6.15
28/30 6.41
31/32/33 6.7
Number of wires (n) Factor (f)
37 7
44 8
48 8.15
52 8.41
56 8.7
61 9
70 10
75 10.15
80 10.41
85 10.7
91 11
102 12
108 12.15
114 12.41
120 12.7

Packaging

Reel sizes from 80 mm (1 kg) to 630 mm (400 kg), subject to diameter

Packaging information

Other dimensions and materials

You need special designs and products for your applications?

Our R&D team is your partner for customised solutions.

Please contact!


Related topics on our website

Languages
Contact
This site uses cookies in order to improve your user experience and to provide content tailored specifically to your interests. Detailed information on the use of cookies on this website is provided in our Privacy Policy. By using this website, you consent to the use of cookies.