Fiber-optic cable OKBs for direct burial installation with central steel modular tube armoured by galvanized steel wires.
OKB-s is designed for installation into grounds of 1-5 groups (depends on cable construction), cable ducts, tunnels in case of high requirements of crush strength. OKB from flame retardant materials is designed for installation according to exclusive standards of fire safety.
Cable core is stainless steel tube. Optical fibers are placed inside a tube. Interstice inside cable core is filled with hydrophobic filler. The armour of galvanized steel wires is formed over the cable core. The interstice between modular tube and armour is filled with hydrophobic filler. The outer high density polyethylene jacket is extruded over the armour. In case the number of fibers exceeds 12 ring marking is used. and/or bundling with identification yarns.
On customer’s request cable design can have following options:
|Number of fibers||2-24||26-36||38-48||50-96|
|Nominal overall diameter, mm||10,0||10,4||10,8||12,0|
|Total mass of cable with polyethylene jacket, kg/km||196||220||242||275|
|Total mass of cable with flame retardant (HF) jacket (kg/km)||223||249||272||310|
|Temperature range of operation, С°||-60… +70|
|Temperature range of installation, С°||-10… +50|
|Transport, storage, С°||-60… +70|
|Minimal bending radius||not less than 20 diameters|
|Guarantee exploitation||2 years after putting in operation, not more than 2,5 years from shipping date|
|Tensile strength||not less than 7 kN|
|Crush strength||not less than 5 kN/100 mm|