A method for electrically grounding and corrosion-protecting a metallic structure includes combining a cementitious powder with water to form a cementitious slurry, applying the cementitious slurry to at least a section of the metallic structure, and curing the cementitious slurry to form a water impermeable and electrically conductive cementitious surround on the section. The cementitious powder includes a cement and a particulate carbonaceous material. The cementitious powder is combined with the water in a ratio of less than or equal to about 2.5 US gallons of water per 55 lb of cementitious powder.

A fracturing well site system includes an electric-driven apparatus, a fuel-driven apparatus, an electric-power supply apparatus and a grounding system. The grounding system includes a first grounding terminal which is spaced from each of the electric-driven apparatus, the fuel-driven apparatus and the electric-power supply apparatus by a preset distance. The fuel-driven apparatus and at least one of the electric-driven apparatus and the electric-power supply apparatus are connected to the first grounding terminal, and the first grounding terminal is configured to ground the fuel-driven apparatus and the at least one of the electric-driven apparatus and the electric-power supply apparatus.

A cable assembly with electrical conductors and fiber optic lines includes a hybrid cable, electrical tethers, a fiber optic tether, and a joining location thereof that includes a shielding unit establishing an electrical contact between shielding of the hybrid cable and shielding of the respective electrical tether cables. The shielding unit includes a central body of an conductive material surrounding the hybrid and tether cables at the joining location, where the central body is in electrical contact with the shielding of the hybrid cable and with the shielding of each electrical tether.

An uninhabited aerial vehicle includes: a calculator that calculates position information indicating a position and an altitude of the vehicle; an image capturing unit that captures an image; a lightning rod; a controller that controls the position and altitude of the vehicle; and a communicator which performs information communication, wherein the calculator transmits the position information to the communicator, the image capturing unit calculates a position of an object to be protected against a thunderbolt from the image, and transmits the calculated position to the communicator, the communicator transmits the position information received from the calculator and the position of the object received from the image capturing unit to the outside, and receives flight instruction information, and the controller controls the position and the altitude of the vehicle based on received flight instruction information of the received flight instruction information.

The invention relates to a discharging device (10) for discharging electrostatic charges from a shaft (14), comprising a conductor arrangement having at least two bending-elastic conductors (24, 25) arranged on a holder (15) and made of a carbon-fiber arrangement, the holder having two holder legs (17, 18) arranged on a common pivot axis (12), each holder leg serving to accommodate a terminal section of a conductor and the holder legs being pivotable relative to each other in order for a holder angle (α) formed between the holder legs to be adjusted and the holder legs being lockable in a defined pivoted position.

A lightning protection system for a tower of a wind turbine is provided. The tower includes a reinforced concrete tower wall in which a plurality of electrically conductive structural reinforcing elements are embedded during construction. The lightning protection system includes a plurality of the structural reinforcing elements connected in an electrically conductive manner with each other and with a ground terminal. Further, a method of incorporating such a lightning protection system in a reinforced concrete tower, and a wind turbine with such a lightning protection system is provided.

A plate-shaped ground plate formed from a copper material, the ground plate includes: an outline frame; a plurality of horizontal ribs connecting the left and right inner peripheral surfaces of the outline frame and distanced from one another in the vertical direction; vertical ribs connecting between the outline frame and the horizontal ribs and between the plurality of horizontal ribs, respectively; and needle-shaped protrusions in the form of a branch which protrude outward on the outer peripheral surfaces of the horizontal ribs.

A sparcap for a spar structure inside a wind turbine blade is provided. A down conductor element is integrated on a side of the sparcap such that after assembly of the sparcap into the spar structure, the down conductor element extends along an outer corner of the spar structure.

An anchor for components of a lightning protection system may rely on a bonding agent, such as an adhesive, needing time for curing, drying, or otherwise setting (increasing in adhesion, strength, mechanical stability, or any combination thereof) by remaining in place while setting. The anchor may be suspended by a lip extending horizontally past an edge (plane of intersection of two planar surfaces) where a base plate is adhered to a vertical surface and the lip rests, registers in translation, and squares in rotation against a horizontal surface sharing an edge or fold (corner, bend) with the vertical surface. Once set sufficiently, the adhesive supports loads in shear (along plane of adhesion) and tension (perpendicular to plane of adhesion) imposed by brackets holding a cable, point, or both at each base plate.

An electrical grounding system can include an electrically conductive column configured for communication with a fault current source, wherein the electrically conductive column can include an open-ended copper tube, and carbon fiber fabric assembled onto at least a portion of the electrically conductive column, the carbon fiber fabric having a conductive relationship with at least a portion of the electrically conductive column.