Standard: IEC 60794; VDE 0888
CONSTRUCTION:
Optical fibers:
SM – single mode optical fibers (9/125 µm)
(G.652D, G.655, G.657A1/A2)
MM – multi mode optical fibers (50/125 or 62,5/125 µm) according to ITU-T Recommendation
Material of fibers:
a) core – Silicon glass: (SiO2) doped with Germanium Dioxide (GeO2);
b) cladding: Silicon glass (SiO2)
c) primary protection: Dual layer of UV-cured acrylate resin
Secondary protection of fibers: Filled loose polymer tube of PBT elastomer, filled with tixotropic jelly mass, loose laid fibers within tube – SZ stranded
Tube material: Polyester PBT-Polybutylene Terephtalate
Fibers and tubes designation: IEC 60304, TIA/EIA-598;
DIN VDE 0888
Central supporting element: FRP – Fiberglass Reinforced Plastic, (Glass roving (thread) reinforced with thermoplastic resin). Central element sheath: PE (or without sheath)
Around/along central strength member – glass yarns doped swellable powder (Glass rowing)
Cable core: Concentrically stranded: around central supporting element are stranded loose tubes and cords, if necessary, in layers
Watertight element: Cable core is dry filled. Swellable elements (yarns, tapes) are used as water protection.
Belt insulation: one or more termoplastic or swellable tapes, helicoidally or longitudinally wrapped
Peripheral supporting elements: Aramid fibers doped with swellable powder are used as water and mechanical protection.
Sheath ripcord: one or more ripcord placed under outer sheath.
Metallic Suspension Strand: Galvanized steel wires stranded in self-supporting rope (many different construction of steel wire ropes)
Sheath: HDPE – high density polyethylene, black. Cable core are connected with the suspension wires by PE sheath to form a figure “8” shape.
APPLICATION:
These optical cables are use for outdoor application, for telecommunication networks: post, railway, distribution TV signals. They are used for installation on overground posts. Suspension stranded rope provides high tensile strength.
The permissible temperature range:
– during installation: from -30°C to +60°C
– during operation: from -30°C to +70°C
– during storage and transport: -40°C to +70°C
Min. permissible bending radius:
– Operation: 20D
– Fixed: 15 D (D – diameter of cable)
Tensile strength, max. (kN): On customer’s request
