Abstract: High voltage three-phase cable comprising three cores positioned so as to assume the configuration with minimum radial dimension and a sheath surrounding the three cores, wherein each core comprises an electric conductor having a substantially triangular shaped cross section with vertex portions and edges; an insulating system surrounding the electric conductor, the insulating system comprising an inner semiconducting layer surrounding the electric conductor, an insulating layer surrounding and in contact with the inner semiconducting layer and an outer semiconducting layer surrounding and in contact with the insulating layer, the layers of the insulating system being made of an extruded polymeric material having a dielectric constant ? comprised from 2 to 2.5; and a metallic screen surrounding the insulating system.

Abstract: A method of manufacturing a glass core preform for optical fibres including providing a porous soot core preform having a central longitudinal hole extending axially therethrough and an a/b ratio of from 0.20 to 0.40; simultaneously dehydrating and doping with fluorine the soot core preform at a temperature of from 1000° C. to 1350° C. by exposing it to an atmosphere containing a chlorine-containing gas and a fluorine-containing gas, the content of the fluorine-containing gas in the atmosphere being of from 0.01% to 0.50% by volume, and simultaneously consolidating the soot core preform and closing the central longitudinal hole by exposing the soot core preform to an atmosphere substantially devoid of fluorine and of chlorine at a consolidation temperature of from 1500° C. to 1650° C., while reducing the pressure down the central hole, thereby forming a glass core preform.

Abstract: An energy cable comprises at least one cable core comprising an electric conductor, a crosslinked electrically insulating layer, and particles of a zeolite system comprising at least a first zeolite and a second zeolite placed in the cable core. A method for extracting crosslinking by-products from a cross-linked electrically insulating layer of an energy cable core comprises manufacturing the energy cable core comprising particles of the above-said zeolite system, heating the energy cable core up to a temperature causing migration of the crosslinking by-products from the crosslinked electrically insulating layer, and placing a metal screen around the energy cable core.

Abstract: High density optical fiber distribution sub-rack comprising: a chassis for housing a plurality of shelves, the chassis comprising at least two shelf storage areas placed side by side with each other, at least one shelf housed in one of the at least two storage areas of the chassis, the at least one shelf having an internal hollow seat for connection modules, the at least one shelf comprising one or more connection modules having a plurality of adapters for interconnection optical fibers, the connection modules being arranged in the internal hollow seat of the at least one shelf at the frontal face of the at least one shelf, wherein the at least one shelf is guided so as to be movable towards the external of the chassis by the succession of a translation movement and a rotation movement of the at least one shelf.

Abstract: A flame-retardant electric cable has a core including an electric conductor and an electrically insulating layer. The electrically insulating layer includes a flame-retardant polyolefin-based composition which includes, as base polymer, a mixture of at least two polyolefin homopolymers and/or copolymer wherein at least one is a low-density polyethylene copolymer having a density lower than 0.915 g/cm3. The flame-retardant polyolefin-based composition also includes calcinated kaolin in an amount greater than 3 phr, a metal hydroxide in an amount greater than 10 phr, and an alkyl or alkenyl alkoxy siloxane. The alkyl or alkenyl alkoxy siloxane is in an amount ratio of from 1:25 to 1:50 with respect to the sum of the amounts of calcinated kaolin and of the metal hydroxide.

Abstract: A joint for high voltage direct current cables extending along a longitudinal axis between two opposite end portions, the joint including: —a central semiconducting electrode; —two semiconducting deflectors; —a field grading layer longitudinally extending between each one of the deflectors and the central electrode and in electric contact therewith; —a joint insulating layer surrounding the central electrode, the two deflectors and the field grading layer; and —a joint outer semiconductive layer surrounding and in direct contact with the insulating layer.

Abstract: Optical fiber connector assembly for a fiber optic cable comprising an optical fiber having an end portion terminated with a ferrule and rod members (4). The optical fiber connector assembly comprises: a ferrule holder (110) configured to hold the end portion of the optical fiber (10), the ferrule (30) and the rod members (4); a connector (190) having an internal passageway for housing the ferrule holder (110); a locking member (180) extending lengthwise and having an internal passageway for the end portion of the fiber optic cable (1). There is also disclosed a pre-connectorized fiber optic cable comprising a fiber optic cable and the optical fiber connector assembly mounted upon an end portion of the fiber optic cable.

Abstract: The present invention relates to an energy cable comprising a cable core comprising an electric conductor and a crosslinked electrically insulating layer, wherein the cable core further comprises a microporous material having a bimodal pore volume distribution with a first peak of the distribution having a maximum at a pore diameter value within the range 5.5-6.5 ? and a second peak of the distribution having a maximum at a pore diameter value within the range 7.5-8.5 ?, the maximum values of the first and the second peak corresponding to an incremental pore volume of at least 4×10?3 cm3/g. The present invention also relates to a method for extracting methane crosslinking by-products from a crosslinked electrically insulating layer of an energy cable.

Abstract: A method of producing an optical-fiber ribbon includes applying bonding material to a major surface of an optical-fiber assembly via a dispenser that is revolving around a central axis to bond adjacent optical fibers in the optical-fiber assembly. The method, which facilitates faster line speeds, achieves an optical-fiber ribbon with an adhesive bead that forms a distorted sinusoidal pattern substantially across the width of the optical-fiber assembly.

Abstract: A fire resistant cable comprising: a conducting element (2; 21); a layer, surrounding the conducting element, made of a ceramifiable composition comprising: —a thermoplastic polymer mixture comprising: (a) a copolymer of ethylene with a C4-C12 alpha-olefin, having a density of from 0.860 to 0.910 g/cm3, a melt flow index not higher than 3 g/10 min and a melting point of 105° C. at most; (b) an ethylene homopolymer or copolymer of ethylene with a C4-C12 alpha-olefin, having a density of from 0.900 to 0.985 g/cm3, a melt flow index not higher than 5 g/10 min and a melting point of at least 110° C.

Abstract: An electric cable for high-voltage applications is disclosed which comprises a core surrounded by an electrically insulating layer made of a composition based on a thermoplastic polymeric material charged with boron nitride powder in an amount up to 20 wt % with respect to the weight of the insulating composition, the boron nitride powder having a particle size distribution D50 up 0 to 15 ?m. Such a cable has improved thermal conductivity property as well as good dielectric resistance and workability in particular through extrusion processes.

Abstract: Armoured cable (10) comprising: —a plurality of cores (12) stranded together according to a core stranding direction; —an armour (16) surrounding the plurality of cores (12) and comprising a layer of metal wires (16a) helically wound around the cores (12) according to an armour winding direction; wherein the at least one of core stranding direction (21) and the armour winding direction (22) is recurrently reversed along the cable length L so that the armoured cable (10) comprises unilay sections (102) along the cable length where the core stranding direction (21) and the armour winding direction (22) are the same. The invention also relates to a method for improving the performances of the armoured cable (10) and to a method for manufacturing the armoured cable (10).

Abstract: A reel includes a first flange, a second flange, and a plurality of segmented structures each including a plurality of links pivotably coupled to a bracket of the first flange by a first end pivot rod and to the a bracket of the second flange by a second end pivot rod. The plurality of links is configured to have a first stable arrangement and a second stable arrangement different from the first stable arrangement. In the first stable arrangement, the first flange and the second flange are separated by a first distance with the reel being configured to support a first maximum load of cable, while in the second stable arrangement, the first flange and the second flange are separated by a second distance less than the first distance with the reel being configured to support a second maximum load of cable less than the first maximum load of cable.

Abstract: A cable includes at least one electrical conductor and at least one electrically insulating layer surrounding the electrical conductor, wherein the at least one electrically insulating layer includes: (a) a thermoplastic polymer material selected from: at least one copolymer (i) of propylene with at least one olefin comonomer selected from ethylene and an V-olefin other than propylene, the copolymer having a melting point greater than or equal to 130° C. and a melting enthalpy of from 20 J/g to 90 J/g; a blend of at least one copolymer (i) with at least one copolymer (ii) of ethylene with at least one V-olefin, the copolymer (ii) having a melting enthalpy of from 0 J/g to 70 J/g; a blend of at least one propylene homopolymer with at least one copolymer (i) or copolymer (ii); a blend of at least one propylene homopolymer with at least one copolymer (i) or copolymer (ii); (b) at least one nano-sized filler; wherein at least one of copolymer (i) and copolymer (ii) is a heterophasic copolymer.

Abstract: In one embodiment, an air-blown optical fiber unit includes one or more optical fibers, an inner layer substantially completely embedding the one or more optical fibers, and an outer layer radially external to the inner layer. The inner layer has a tensile strength of from 0.1 MPa to 1 MPa, and an elongation at break of from 10% to 80%.

Abstract: Embodiments of the present disclosure provide an apparatus and method for manufacturing of optical cable buffer tubes using an emulsion lubricant. In an embodiment, an optical cable includes a plurality of buffer tubes. Each buffer tube includes a bundle of optical fibers comprising an outer surface area, a swellable-thread comprising a hydrophilic base material comprising water, and a layer of silicone contacting at least a part of the outer surface area.

Abstract: An optical-fiber ribbon having excellent flexibility, strength, and robustness includes optical fibers having a sacrificial, outer release layer that facilitates separation of an optical fiber from the optical-fiber ribbon without damaging the optical fiber's glass core, glass cladding, primary coating, secondary coating, and ink layer, if present.

Abstract: A fire resistant cable comprising: a conducting element (2; 21); a layer, surrounding the conducting element, made of a ceramifiable composition comprising: —a thermoplastic polymer mixture comprising: (a) a copolymer of ethylene with a C4-C12 alpha-olefin, having a density of from 0.860 to 0.910 g/cm3, a melt flow index not higher than 3 g/10 min and a melting point of 105° C. at most; (b) an ethylene homopolymer or copolymer of ethylene with a C4-C12 alpha-olefin, having a density of from 0.900 to 0.985 g/cm3, a melt flow index not higher than 5 g/10 min and a melting point of at least 110° C.

Abstract: A method for manufacturing an electrical cable includes providing at least one core including an electrical conductor, and arranging at least one copper sheath around the at least one core. The arranging of the copper sheath includes providing at least one foil of copper having two opposite first edges; bending the foil of copper around the core until the first edges of the foil of copper are contacted with each other; welding the first edges of the foil of copper to each other to form a corresponding solder jointwelded joint; and deposing a copper coating on at least portions of the surface of the foil of copper at the welded joint. The deposing the copper coating is carried out by means of a thermal spray process.

Abstract: The present disclosure relates to an energy cable comprising at least one cable core comprising an electric conductor, a crosslinked electrically insulating layer, and particles of a zeolite system comprising at least a first zeolite and a second zeolite placed in the cable core. The particles of the first zeolite are able to extract and absorb, very efficiently and irreversibly, the by-products deriving from the cross-linking reaction, so as to avoid space charge accumulation in the insulating material during cable lifespan. The particles of the second zeolite are able to absorb the water molecules that unexpectedly form from the dimerization/oligomerization and decomposition reaction of the crosslinking by-products upon their absorption on the first zeolite, so as to avoid the formation of water-trees in the insulating material.