OPGW + stranded layer
Optical ground wire with the optical module in the stranded layer
OKGT-S is an optical ground wire with the optical module (or modules) stranded in the layer around a central steel element. Unlike OKGT-Ts, where the module sits in the centre, in OKGT-S the modules are arranged around the central steel wire, which makes it possible to accommodate a larger number of modules and fibres. It is used when a large number of fibres is needed in a single cable. Designation breakdown: S – optical module(s) in the stranded layer.
Types and sizes with technical specifications.
| Type | Fibre count | ⌀, mm | Weight, kg/km | Breaking strength, kN |
|---|---|---|---|---|
| OKGT-S-12 | 12 | 12.5 | 395 | 60 |
| OKGT-S-24 | 24 | 13.5 | 465 | 72 |
| OKGT-S-48 | 48 | 15.2 | 555 | 85 |
| OKGT-S-72 | 72 | 16.5 | 645 | 98 |
| OKGT-S-96 | 96 | 17.8 | 745 | 112 |
OKGT-S is a variant of optical ground wire in which the optical modules are located not in the centre of the cable (as in OKGT-Ts) but in the stranded layer around the central steel wire. This makes it possible to fit more modules into a single cable – for example, 4 modules of 24 fibres each = 96 fibres.
The “S” design is particularly useful when many independent optical channels are required in a single cable – for example, for different telecom operators, the power grid's technical services and monitoring systems. Each module can be allocated to a separate service.
OKGT cables are supplied on the basis of individual calculations, separately for each project – TCG collects all the necessary requirements and selects a unique configuration according to the loads, climatic conditions and number of fibres.
Central element
Aluminium-clad steel wire, grade 20SA.
1st layer with optical modules
One or more steel optical modules containing the fibres + aluminium-clad steel wires. The modules are filled with hydrophobic gel.
Optical fibres
Loosely laid in the modules, grouped into bundles. G.652.D + G.657.A1.
2nd layer
Aluminium-clad steel wires, grade 20SA.
OKGT-S cross-section – central steel wire + a stranded layer of optical modules and Al-clad steel wires
Detailed specifications – see the project specification
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