Abstract: The present disclosure relates to a dry-type cable termination comprising: a tubular support structure comprising: an insulator support comprising a frustoconical portion, wherein the insulator support is made of an electrically insulating non-metallic composite material having a tensile modulus of at least 11 GPa; and a screen tube; an insulating body at least partially externally covering and directly contacting the support structure; an elastomeric stress cone housed in the frustoconical portion and in direct contact to the frustoconical portion; an electrode, housed within the screen tube, connected with the stress cone and in electric contact with the screen tube.

Abstract: The present disclosure relates to a submersible apparatus (1) for testing a submarine high voltage (HV) cable system. The apparatus (1) includes a cable termination (100) including an electrical insulator (101) and a shielding electrode (102) for the electrical connection with a cable end (201). The apparatus (1) additionally includes a cable bend restrictor (300) having a through channel (301), and a termination locking (400) in through communication with the cable bend restrictor (300) and the cable termination (100). According to another aspect, a method for testing a submarine high voltage (HV) cable apparatus using the above testing apparatus (1) is additionally disclosed.

Abstract: A cable termination system including a power cable sequentially including a first length of exposed outer semiconductive layer, a length of exposed insulating layer and a length of exposed electric conductor, an electric field control element adapted to be arranged around a portion of said power cable, said electric field control element including: first and second longitudinally spaced semiconducting electrodes; a field grading layer longitudinally extending between the first and second semiconducting electrodes and in electric contact therewith; an insulating layer surrounding the semiconducting electrodes and the field grading layer, wherein the first semiconducting electrode is positioned across a first boundary between the first length of exposed outer semiconductive layer and the length of exposed insulating layer, wherein said second semiconducting electrode is electrically connected with said length of exposed electric conductor, a tubular insulating body adapted to house said power cable and said ele

Abstract: The present disclosure relates to a submersible apparatus (1) for testing a submarine high voltage (HV) cable system. The apparatus (1) includes a cable termination (100) including an electrical insulator (101) and a shielding electrode (102) for the electrical connection with a cable end (201). The apparatus (1) additionally includes a cable bend restrictor (300) having a through channel (301), and a termination locking (400) in through communication with the cable bend restrictor (300) and the cable termination (100). According to another aspect, a method for testing a submarine high voltage (HV) cable apparatus using the above to testing apparatus (1) is additionally disclosed.

Abstract: The present disclosure relates to a dry-type cable termination comprising: a tubular support structure comprising: an insulator support comprising a frustoconical portion, wherein the insulator support is made of an electrically insulating non-metallic composite material having a tensile modulus of at least 11 GPa; and a screen tube; an insulating body at least partially externally covering and directly contacting the support structure; an elastomeric stress cone housed in the frustoconical portion and in direct contact to the frustoconical portion; an electrode, housed within the screen tube, connected with the stress cone and in electric contact with the screen tube.

Abstract: A cable termination system including a power cable sequentially including a first length of exposed outer semiconductive layer, a length of exposed insulating layer and a length of exposed electric conductor, an electric field control element adapted to be arranged around a portion of said power cable, said electric field control element including: first and second longitudinally spaced semiconducting electrodes; a field grading layer longitudinally extending between the first and second semiconducting electrodes and in electric contact therewith; an insulating layer surrounding the semiconducting electrodes and the field grading layer, wherein the first semiconducting electrode is positioned across a first boundary between the first length of exposed outer semiconductive layer and the length of exposed insulating layer, wherein said second semiconducting electrode is electrically connected with said length of exposed electric conductor, a tubular insulating body adapted to house said power cable and said ele

Abstract: The present invention relates to a cable termination system comprising: —a power cable sequentially comprising a first length of exposed outer semiconductive layer, a length of exposed insulating layer and a length of exposed electric conductor, —an electric field control element adapted to be arranged around a portion of said power cable, said electric field control element comprising: —first and second longitudinally spaced semiconducting electrodes; —a field grading layer longitudinally extending between the first and second semiconducting electrodes and in electric contact therewith; —an insulating layer surrounding the semiconducting electrodes and the field grading layer, —wherein the first semiconducting electrode is positioned across a first boundary between the first length of exposed outer semiconductive layer and the length of exposed insulating layer, —wherein said second semiconducting electrode (160) is electrically connected with said length of exposed electric conductor (20), —a tubular insula

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: The present invention relates to a cable termination system comprising: —a power cable sequentially comprising a first length of exposed outer semiconductive layer, a length of exposed insulating layer and a length of exposed electric conductor, —an electric field control element adapted to be arranged around a portion of said power cable, said electric field control element comprising: —first and second longitudinally spaced semiconducting electrodes; —a field grading layer longitudinally extending between the first and second semiconducting electrodes and in electric contact therewith; —an insulating layer surrounding the semiconducting electrodes and the field grading layer, —wherein the first semiconducting electrode is positioned across a first boundary between the first length of exposed outer semiconductive layer and the length of exposed insulating layer, —wherein said second semiconducting electrode (160) is electrically connected with said length of exposed electric conductor (20), —a tubular insula

Abstract: The present invention relates to a joint (100) for high voltage direct current cables (200, 300) extending 5 along a longitudinal axis (X) between two opposite end portions (110, 120), the joint (100) comprising: —a central semiconducting electrode (140); —two semiconducting deflectors (150, 160); —a field grading layer (170) longitudinally extending 10 between each one of the deflectors (150, 160) and the central electrode (140) and in electric contact therewith; —a joint insulating layer (180) surrounding the central electrode (140), the two deflectors (150, 160) 15 and the field grading layer (170); and —a joint outer semiconductive layer (190) surrounding and in direct contact with the insulating layer (180).

Abstract: A cable termination including a cable terminal and a cable joint assembly. The cable terminal includes: a terminal conductor; a monitoring device including a capacitive voltage sensor around the terminal conductor; and an electrically insulating body fitted around the terminal conductor, including a bell-shaped end portion in which the voltage sensor is at least partially embedded. The cable terminal alternatively includes: a terminal conductor; a monitoring device including a capacitive voltage sensor around the terminal conductor; and an electrically insulating body fitted around the terminal conductor, including a bell-shaped end portion in which the voltage sensor is at least partially embedded and a stem end portion, the terminal conductor extending beyond the stem end portion.

Abstract: The present invention relates to an accessory for high-voltage direct-current (HVDC) energy cables comprising: at least one element made from a crosslinked elastomeric polymer material, and at least one scavenging layer comprising zeolite particles. The zeolite particles are able to scavenge, very efficiently and irreversibly, the by-products deriving from the cross-linking reaction, so as to avoid space charge accumulation in the element during the accessory lifespan. Moreover, the zeolite particles can prevent the crosslinking by-products present in the element of a non-degassed accessory from migrating towards the insulating layer of the energy cable on which the accessory is mounted.

Abstract: The present invention relates to an accessory for high-voltage direct-current (HVDC) energy cables comprising: at least one element made from a crosslinked elastomeric polymer material, and at least one scavenging layer comprising zeolite particles. The zeolite particles are able to scavenge, very efficiently and irreversibly, the by-products deriving from the cross-linking reaction, so as to avoid space charge accumulation in the element during the accessory lifespan. Moreover, the zeolite particles can prevent the crosslinking by-products present in the element of a non-degassed accessory from migrating towards the insulating layer of the energy cable on which the accessory is mounted.

Abstract: A cable termination including a cable terminal and a cable joint assembly. The cable terminal includes: a terminal conductor; a monitoring device including a capacitive voltage sensor around the terminal conductor; and an electrically insulating body fitted around the terminal conductor, including a bell-shaped end portion in which the voltage sensor is at least partially embedded. The cable terminal alternatively includes: a terminal conductor; a monitoring device including a capacitive voltage sensor around the terminal conductor; and an electrically insulating body fitted around the terminal conductor, including a bell-shaped end portion in which the voltage sensor is at least partially embedded and a stem end portion, the terminal conductor extending beyond the stem end portion.