Our standard model direction is left hand lay S (Z on request).
Litzwires, used for windings, are produced following customers' specification.
Our enamelled copper wires that are used to produce Litzwires respect IEC (International Electrotechnical Organisation) standards in force.
Litz wire cross section
Bunches are an assembly of several enamelled copper wires. For large cables, several stranded wires are bunched together. In this type of cable, the wires do not have a definite place in the conductor.
Litzwires are stranded on UNILAY-FREE (bunches not tight or free). The winding's direction of the layer is the same.
A)  Cross Sections
We are able to supply to your company unit wires covered but also and above all bunches with a number of strands between 2 and 56 000..
For bunches of Litzwires, dimensions are between 0,064mm and 25mm of diameter.
Cables' cross sections are located between 0,004 mm² and 200 mm².
We can shape it by rolling the wire in square or rectangular section..
Rolling in square or rectangular section is possible on cables between 2,5 mm² and 150 mm².
The nominal overall diameter is termined by the following formula:
D = p.√n.d + thickness covering
D= nominal diameter of wire (on textile layer),
p= Space factor,
n= Number of elementary enamelled wire,
d= overall diameter of an elementary enamelled wire.
|Number of elementary wires
|From 3 to 12
|From 13 to 18
|From 19 to 25
|More than 25
C)  Electrical resistance
The value of resistance is calculated with formula below:
K Factor is linked to twisting process (or covering process) which pulls the extenion of the thread
This coefficient is maximum 1,10.
D)  Stranding pitch
Short pitch : Litz flex, good holding of each strand, better roundness.
Long pitch : Litz stiffer, less good holding, better spreading for filling.
Pitch can be adjusted between 1 and 500m, knowing that our standard one is ±20% with a minimum of ± 1mm.
We can also :
- accept smallest tolerance on request.
- Rewinding some parallel wires.
Covering with textile fiber
- Natural silk
- Artificial silk
Covering with tape
- Mylar Polyester
Jacketting by extrusion
- Polyvinyl Chloride « standard »
- Polyvinyl Chloride High temperature
- Teflon fep