A communications cable is provided that includes a pair of twisted pair of wires, each coated with a fluoropolymer insulator. The twisted pair of wires is configured to carry a differential signal, such as a differential data signal and/or a differential power signal. The fluoropolymers are highly effective insulators and significantly reduce both the effects of internal and external electromagnetic interference while maintaining low cable attenuation, even when operating within a temperature range of-40° C. to 150° C.

A communications cable is provided that includes a pair of twisted pair of wires, each coated with a fluoropolymer insulator. The twisted pair of wires is configured to carry a differential signal, such as a differential data signal and/or a differential power signal. The fluoropolymers are highly effective insulators and significantly reduce both the effects of internal and external electromagnetic interference while maintaining low cable attenuation, even when operating within a temperature range of-40° C. to 150° C.

A cable end is provided, such as an end of a cable for transporting electric energy. The cable end includes an electrically insulating layer obtained from a composition including at least: a polymer matrix, the polymer matrix being made up of one or more synthetic rubbers; a metal hydroxide as metallic filler, the metal hydroxide being present in the composition, such that for 100 parts by weight of composition, the metal hydroxide is present in a larger proportion by weight in the composition than the polymer matrix; a coupling agent between the polymer matrix and the metal hydroxide; and a plasticizer. A method of producing a cable end is also provided.

A cable end is provided, such as an end of a cable for transporting electric energy. The cable end includes an electrically insulating layer obtained from a composition including at least: a polymer matrix, the polymer matrix being made up of one or more synthetic rubbers; a metal hydroxide as metallic filler, the metal hydroxide being present in the composition, such that for 100 parts by weight of composition, the metal hydroxide is present in a larger proportion by weight in the composition than the polymer matrix; a coupling agent between the polymer matrix and the metal hydroxide; and a plasticizer. A method of producing a cable end is also provided.

A cable fitting for cables that can be used for high-voltage direct-current (HVDC) energy transmission, the cable fitting having an electrically insulating layer. A process for the production of an electrically insulating layer of such a cable fitting, and also the use thereof.

A cable fitting for cables that can be used for high-voltage direct-current (HVDC) energy transmission, the cable fitting having an electrically insulating layer. A process for the production of an electrically insulating layer of such a cable fitting, and also the use thereof.

A fire resistant coaxial cable and method of making is described that has a 2-part dielectric made of a polymer foam and a ceramifiable silicone rubber. The polymer foam, which can be polypropylene or other polymers, leaves little-to-no residue in the cable that causes electromagnetic loss when upon burning. The polymer foam can be extruded over a center conductor using an inert gas, such as nitrogen, to propagate the foam, ensuring little-to-no residue in the cable. The ceramifiable silicone rubber can be extruded over the polymer foam. The ceramifiable silicone rubber can have a polysiloxane matrix with inorganic flux and refractory particles that ceramify under high heat, such as temperatures specified by common fire test standards (e.g., 1850° F./1010° C. for two hours). The cable is configured to maintain a relatively coaxial relation between a center conductor and an outer conductor even under aforementioned fire tests. Another layer of ceramifiable silicone rubber surrounds the outer conductor and continues to insulate it from the outside if a low-smoke zero-halogen (LSZH) jacket burns away.

A fire resistant coaxial cable and method of making is described that has a 2-part dielectric made of a polymer foam and a ceramifiable silicone rubber. The polymer foam, which can be polypropylene or other polymers, leaves little-to-no residue in the cable that causes electromagnetic loss when upon burning. The polymer foam can be extruded over a center conductor using an inert gas, such as nitrogen, to propagate the foam, ensuring little-to-no residue in the cable. The ceramifiable silicone rubber can be extruded over the polymer foam. The ceramifiable silicone rubber can have a polysiloxane matrix with inorganic flux and refractory particles that ceramify under high heat, such as temperatures specified by common fire test standards (e.g., 1850° F./1010° C. for two hours). The cable is configured to maintain a relatively coaxial relation between a center conductor and an outer conductor even under aforementioned fire tests. Another layer of ceramifiable silicone rubber surrounds the outer conductor and continues to insulate it from the outside if a low-smoke zero-halogen (LSZH) jacket burns away.

Power cable having an insulation system comprising at least one layer made of a thermoplastic material based on a polypropylene matrix admixed with a dielectric fluid, the thermoplastic material having a melting enthalpy of from 15 to 50 J/g and the polypropylene matrix being made of a material selected from: a heterophasic ethylene-propylene copolymer (a) having a melting enthalpy of from 15 to 50 J/g; or an intimate admixture of (a) and a propylene homopolymer or an ethylene propylene copolymer (b) having a melting enthalpy greater than 50 J/g. The cable is particularly suitable for current transport at high voltage or extra high voltage.

A communications cable is provided that includes a pair of twisted pair of wires, each coated with a fluoropolymer insulator. The twisted pair of wires is configured to carry a differential signal, such as a differential data signal and/or a differential power signal. The fluoropolymers are highly effective insulators and significantly reduce both the effects of internal and external electromagnetic interference while maintaining low cable attenuation, even when operating within a temperature range of −40° C. to 150° C.