Components for Generators and Motors

Roebel bars

Mechanically produced Roebel bars are a guarantee of quality, precision and cost reduction.

Components for generators and motors

Roebel bars

As early as 1977, ASTA developed a method of mechanizing the manufacture of Roebel bars similar to the manufacture of CTCs.

A special type of enamel-glass yarn insulation has permitted economic production of all standard sizes; the extra cross over insulation hitherto required at the transposition areas could be dropped in most cases.

While conventional Roebel bars usually contain an even number of strips, the mechanically preassembled type may also be made from odd numbers, with the added benefit of increasing the copper cross section by one strip within the same stack size.

Machine-made Roebel bars thus combine the advantages of savings in cost and time, better space factor, and high dielectric strength. Further detailed information is available on request.


Number of single strips: can be computed from maximum bundle height and thickness of insulated strips
Strip width: 3.50 to 12.50 mm
Strip thickness: 1.30 to 3.20 mm
Geometric ratio: ≥ 2.5 : 1 ≤ 8 : 1
Maximum bundle width: 27 mm
Maximum bundle height: 130 mm
Maximum bar length: 9000 mm
Roebeling factor: (nominal pitch / strip width) > 3
Lower roebeling factors are available on request, depending on roebelbar design
Stranding angle: 360°, 540°, 720° or variable stranding
(variable pitches within the same bar , etc.).

Other dimensions available on request.