The invention relates to a modular and compact arrangement (200) of three phases (A, B, C) of a gas-insulated apparatus (100), that is suitable for placement inside a tunnel or a pipe (106) or another confined space. According to the invention, the three phases (A, B, C) are arranged in a triangle or side-by-side on a fixation part (103, 104) which includes a roller system (105; 105a, 105b, 105c, 105d). This allows the insertion of such a three-phase assembly (100) into confined spaces such as pipes or tunnels (106), without the need for access by workers or machinery. Furthermore, the present disclosure relates to a method for assembling and installing such a three-phase arrangement (100) into the confined space (106).

A wiring sheet includes one or more carbon wires each of which is one of a signal line and a power supply line, and which are conductors including carbon as a main material and have flexibility; and an insulation sheet that encloses substantially an entirety of the one or more carbon wires, includes an electrical insulator as a main material, and has flexibility.

The present invention relates to a power transmission underground cable winding device and a power transmission underground cable spreading system comprising same and, more specifically, to: a power transmission underground cable winding device for installing a power transmission three-phase underground cable in an underground power tunnel or conduit; and a power transmission underground cable spreading system comprising same.

The present invention relates to a power transmission underground cable winding device and a power transmission underground cable spreading system comprising same and, more specifically, to: a power transmission underground cable winding device for installing a power transmission three-phase underground cable in an underground power tunnel or conduit; and a power transmission underground cable spreading system comprising same.

A cable support assembly (2) for supporting a cable assembly including (4) a plurality of cables (6, 8, 10) is disclosed. The cable support assembly comprises a support (18) and cable retaining devices for supporting the cable assembly such that a joint (12, 14, 16) between first and second sections (6a, 6b; 8a, 8b; 10a, 10b) of at least one cable is arranged on a side of the cable assembly facing away from the support and is spaced further from the support than sections of the cable located remote from the joint.

The present invention relates to a power transmission underground cable winding device and a power transmission underground cable spreading system comprising same and, more specifically, to: a power transmission underground cable winding device for installing a power transmission three-phase underground cable in an underground power tunnel or conduit; and a power transmission underground cable spreading system comprising same.

The present invention relates to a power transmission underground cable winding device and a power transmission underground cable spreading system comprising same and, more specifically, to: a power transmission underground cable winding device for installing a power transmission three-phase underground cable in an underground power tunnel or conduit; and a power transmission underground cable spreading system comprising same.

A protective cover for surrounding a conduit assembly in a mine has a flexible elongate main body that comprises a plurality of discrete functional layers and which is configurable as a sleeve having an outer surface, the protective cover comprising a first layer, substantially comprised of an aramid based material, that is structurally configured to provide substantial protection from the force associated with impacting projectiles originating from the external environment whilst also being configured to substantially resist internally generated forces of the type that are typically associated with a burst hose, a second layer, adjacent to the outer surface of the first layer, that is structurally configured in the form of a mesh thereby protecting the first layer from external bodies that may otherwise potentially induce tear damage to the first layer, the protective cover characterised by further comprising a third layer, adjacent to said first layer, comprising a polymeric membrane that is substantially impermeable to the passage of at least one liquid. There is also provided a system for protecting at least one or a plurality of cables and/or hoses from matter falling from above, said system comprising use of at least one such protective cover suspended from a flexible strand that is in turn attached to a fixed structure that is located substantially vertically above said at least one or a plurality of cables and/or hoses.

A protective cover for surrounding a conduit assembly in a mine has a flexible elongate main body that comprises a plurality of discrete functional layers and which is configurable as a sleeve having an outer surface, the protective cover comprising a first layer, substantially comprised of an aramid based material, that is structurally configured to provide substantial protection from the force associated with impacting projectiles originating from the external environment whilst also being configured to substantially resist internally generated forces of the type that are typically associated with a burst hose, a second layer, adjacent to the outer surface of the first layer, that is structurally configured in the form of a mesh thereby protecting the first layer from external bodies that may otherwise potentially induce tear damage to the first layer, the protective cover characterised by further comprising a third layer, adjacent to said first layer, comprising a polymeric membrane that is substantially impermeable to the passage of at least one liquid. There is also provided a system for protecting at least one or a plurality of cables and/or hoses from matter falling from above, said system comprising use of at least one such protective cover suspended from a flexible strand that is in turn attached to a fixed structure that is located substantially vertically above said at least one or a plurality of cables and/or hoses.

De-trenching apparatus (100) for extracting a buried line, such as a cable or pipeline, is disclosed. The de-trenching apparatus comprises a channel (112) configured to receive a buried line to be extracted, the channel comprising a first flared opening (114) at a front end of the de-trenching apparatus and a second flared opening (115) at the rear end of the de-trenching apparatus, the first and second flared openings each having a curved surface (111) configured to support the line during extraction, and material removal means for removing material from around the buried line ahead of the de-trenching apparatus.