An undersea connection system for connecting together at least three high voltage or very high voltage undersea electric cables comprises an outer cage defining a connection space; and a connection fitting comprising a conductive connection electrode that presents a junction node from which there extend at least three branches. Each of the at least three branches of the conductive electrode includes a male terminal portion that is connected to a respective one of the electric cables in a connection zone about which there is mounted a connection sleeve made of pre-molded insulating material that receives, via its ends, firstly the male terminal portion of one of the branches of the conductive electrode, and secondly the connection end of one of the electric cables.

A pre-expanded cover assembly unit for covering an electrical connection between first and second cables includes a cover assembly in a folded state including an elastomeric outer sleeve defining a cable passage to receive the electrical connection. The outer sleeve includes an intermediate section and first and second outer sections. The first outer section is folded at a first annular fold and is on the intermediate section and/or the second outer section. The cover assembly includes a first retention layer between the intermediate section and the first outer section. The cover assembly includes a first friction reducing layer between the first retention layer and the first outer section. The cover assembly unit includes a removable holdout mounted within the outer sleeve. The cover assembly is movable from a folded state to an unfolded state by sliding the first outer section in a first axial direction away from the intermediate section.

A tubular cable interconnect unit arranged on an outer periphery of a joint of a power cable, includes a tubular insulating tube, a non-ohmic resistor layer formed from a non-ohmic composition and provided on an inner peripheral surface of the insulating tube, and an inner semiconductive layer provided on the non-ohmic resistor layer, wherein the non-ohmic composition includes a base polymer including at least one of thermoplastic and rubber, and varistor grains having a non-ohmic characteristic in which a volume resistivity varies non-linearly with respect to an applied voltage, and the varistor grains have a maximum grain diameter of 30 m or less.

The present invention relates to a cable fitting for cables that can be used for high-voltage direct-current (HVDC) energy transmission, where the cable fitting has an electrically insulating layer, to a process for the production of an electrically insulating layer of such a cable fitting, and also to use thereof.

The present invention relates to a cable fitting for cables that can be used for high-voltage direct-current (HVDC) energy transmission, where the cable fitting has an electrically insulating layer, to a process for the production of an electrically insulating layer of such a cable fitting, and also to use thereof.

Provided are a high dielectric insulating silicone rubber composition and an electric field relaxation layer. This high dielectric and insulating silicone rubber comprises: (A) 100 parts by mass of an organopolysiloxane represented by formula (1),

R.sup.1.sub.nSiO.sub.(4n)/2(1),

(in the formula, R.sup.1 represents the same or different, substituted or unsubstituted monovalent hydrocarbon groups, and n is a positive number of 1.95 to 2.04); (B) 60 to 150 parts by mass of thermal black having an average primary particle size of 150 to 500 nm; (C) 5 to 100 parts by mass of reinforcing fumed silica having a specific surface area measured by a BET adsorption method of 50 m.sup.2/g or more; and (D) 0.1 to 10 parts by mass of a curing agent. The composition is characterized in that a cured product thereof satisfies a dielectric constant of 10 or more, a volume resistivity of 1.010.sup.13 to 1.010.sup.17 .Math.cm, a loss tangent of 0.1 or less, and a dielectric breakdown strength (BDV) of 7 kV/mm or more.

A cold shrinkable terminal comprises a terminal body fixed to a cable joint disposed at an end of the cable and a composite void filling mastic. The cable joint includes a conductor core, an inner insulation layer disposed on the conductor core, and a conductive shielding layer disposed on the inner insulation layer. The composite void filling mastic covers an incision of the conductive shielding layer and includes a filling layer in contact with the cable joint and a separating layer disposed between the filling layer and the terminal body. The separating layer is made of a material different than the terminal body.

A cold shrinkable terminal comprises a terminal body fixed to a cable joint disposed at an end of the cable and a composite void filling mastic. The cable joint includes a conductor core, an inner insulation layer disposed on the conductor core, and a conductive shielding layer disposed on the inner insulation layer. The composite void filling mastic covers an incision of the conductive shielding layer and includes a filling layer in contact with the cable joint and a separating layer disposed between the filling layer and the terminal body. The separating layer is made of a material different than the terminal body.

A coaxial cable connector (610) for connecting a coaxial cable (600), wherein the connector (610) comprises an elongated ferrule (612) arranged to be configured in electrical contact with at least one metal braid layer (606) of the coaxial cable (600); a compression fitting (614) arranged around said ferrule (612); and means (618) for applying a pressure force to the compression fitting (614) such that a surface (614a) of the compression fitting (614) applies a force to an outer insulating layer (608) of the coaxial cable (600) surrounding said at least one metal braid layer (608) substantially over the whole length of said surface (614a) of the compression fitting (614).

A non-ohmic composition including a base elastomer and a plurality of non-ohmic particles, wherein, in a case of comparing volume resistivities ? for the non-ohmic composition within a range of E?E.sub.th for the non-ohmic composition not elongated, the E being an electric field strength applied to the non-ohmic composition, the ? being the volume resistivity of the non-ohmic composition, and the E.sub.th being a threshold electric field strength at a point where an absolute value of a variation in a slope of log ? with respect to log E is maximum, the volume resistivity ? for the non-ohmic composition uniaxially elongated by 50% is 50 times or less the volume resistivity ? for the non-ohmic composition not elongated.