|
In contrast to ground and underground laying of cables, with the pulling of
overhead lines the traction forces that develop and that have to be borne by the
overhead cable pulling grips are considerably larger. For this reason, much stronger
cords and a triple strand mesh are required. However, in order to keep the
overhead cable pulling grips flexible, the netting is composed of three different
mesh types that exactly correspond to the occurring distribution of traction forces:
| Type 1: single-strand netting - | for the bearing of moderate loads and for the build-up of force closure |
| Type 2: double-strand netting - | double-strand netting - for the bearing of higher loads and for further build-up of force closure
| | Type 3: triple-strand netting - | for the bearing of the full loads and for complete force closure
|
Through the resulting self-interlacing effect the pulling grip maintains a high traction with the conductor cable.
This pulling grip comes with a press-on eyelet suitable for conventional cable pulling - however, due to their rigid press-on clamp these pulling grips are not suitable for being pulled over driving pulleys, capstan heads, or figure-ofeight breakers with a diameter smaller than 1000 mm. There is a risk of individual strands being broken away from the outer surface of the pulling grip.
Random samples of these pulling grips are handed over to an independent rope testing shop for the execution of rupture tests. On request, we are happy to provide our customers with a manual (compiled according to our practical experience) as well as a table containing all technical data for pulling grips for overhead cables upon delivery of the products.
|
Designation
|
Rope-
Diameter
[mm]
|
Colour-
coding
|
Permissible workload with a 3 times higher security load [kN]
|
Mesh length
approx. [mm]
|
Total length Dimension
approx. [mm]
|
MS 10,9 |
6 - 10,9 |
violet |
6 |
770 |
980 |
MS 15,9 |
11 - 15,9 |
green |
12 |
900 |
1170 |
MS 20,9 |
16 - 20,9 |
yellow |
22 |
1180 |
1520 |
MS 26,9 |
21 - 26,9 |
grey |
31 |
1550 |
1980 |
MS 37,9 |
27 - 37,9 |
red |
40 |
1650 |
2100 |
MS 44,9 |
38 - 44,9 |
brown |
42 |
1850 |
2300 |
MS 55 |
45 - 55 |
blue |
46 |
2400 |
2900 |
|
