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22/05/2025 – Niehoff technology: Flat wire drawing and annealing

Producing flat copper wire for cable shieldings

The copper shielding around the insulation layer is an important component of HV and EHV cables. It acts as a protection shield against electromagnetic radiation and is usually made of round wires. Flat wires, however, would be much more advantageous for several reasons.

Next image
MSM-88--R-503-RBD-line.jpg

Fig. 1. “MSM 88 + R 503” type “RBD” line. © Niehoff

 
MSM-88--R-503-RBD-line.jpg

Fig. 1. “MSM 88 + R 503” type “RBD” line. © Niehoff

 
Profilstein.jpg

Fig. 2. Drawn flat copper wire, micrograph, after the first shaped die (magnification = 50:1). Cross section: 20.523mm², width: 5.560mm, height: 4.386mm. © Niehoff

 
Profilstein.jpg

Fig. 3. Drawn flat copper wire, micrograph, after the fifth shaped die (magnification = 50:1). Cross section: 7.817mm², width: 5.220mm, height: 1.624mm. © Niehoff

 
Profilstein-fertig.jpg

Fig. 4. Drawn flat copper wire, micrograph, after the ninth shaped die (finished die) (magnification = 50:1). Cross section: 3.192mm², width: 4.852mm, height: 0.677mm. © Niehoff

 
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Further articles for:

  • cable manufacture
  • electromagnetic shielding
  • Maschinenfabrik Niehoff
  • wire drawing
  • wire manufacture
Jörg Dambock
Editor-in-chief

Jörg Dambock

Maschinenfabrik Niehoff GmbH & Co. KG

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