Lahnlitze

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A Lahnleiter or a Lahnlitze is an electrical conductor that consists of one or more elements stranded together, each element being made up of one or more thin metal strips that are helically wound around a textile thread.

Lahnlitze is much more flexible and therefore more resistant to material fatigue than conventional strands or a solid conductor.

Manufacture and properties

Lahnlitze is made by wrapping several thin metal strips ( Lahn , i.e. flattened wires or thin metal foil) around a flexible carrier thread made of nylon or textiles. These very thin ribbons are subjected to a bending radius that is much larger than their thickness. This means that breakage due to material fatigue is unlikely. At the same time, the carrier thread guarantees high tensile strength and flexibility.

use

Lahnlitze is often used for telephone cords, especially for handset cords, as well as for headphones.

It is also used for power cords for very small electrical devices such as electric razors or watches, where a strand of sufficient diameter would be too stiff.

connection

Lahnlitze is usually connected by insulation displacement terminals, which penetrate the insulation so that no stripping is required. The individual wires are quite sensitive when they are separated from the carrier thread, and the carrier thread can be damaged by high temperatures. Therefore, it is difficult or impractical Tinsel in the manufacture of electrical equipment by soldering to connect - but it is possible, though not easy to repair a faulty connection by soldering. However, the wires break easily at the rigid solder joint.

literature

Telephone cords:

  • DIN 47104 stranded wire for telecommunication cords

Mains connection cables:

  • EN 50525-2-71 Cables and wires - Power cables with nominal voltages up to 450/750 V (U0 / U) - Part 2-71: Power cables for general applications - Litz wires with thermoplastic PVC insulation . This European standard describes the type H03VH-Y.
  • UL 62 Flexible Cords and Cables . This standard for the USA, Canada and Mexico describes, among other things, a. "Tinsel cords" with the types TST and TPT with a nominal current of 0.5 A.

See also

Individual evidence

  1. ↑ International Electrotechnical Dictionary - IEV 461-01-18
  2. ^ GF Moore (Ed.): Electric cables handbook third edition , Blackwell Science, 1997 ISBN 0-632-04075-0 , p. 234