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.

Disclosed is a modular, portable external lightning protection system for protecting objects, persons, and/or animals inside its area. In embodiments, the disclosed system may comprise threaded connections and/or through-hole connections to provide a weld-free system, which requires minimal expertise and time to install. Additionally, the disclosed system may be installed without modification of a protected object.

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.

The utility pole mounted lightning rod may comprise a base plate, a housing tube, and a lightning rod. The utility pole mounted lightning rod may be a lightning protection system that is adapted to be mounted at the top of a utility pole. The utility pole mounted lightning rod may divert energy from a lightning strike to a grounding wire and away from primary wires and other power utility equipment. The base plate may be coupled to a side of the utility pole at the top of the utility pole. The housing tube may be coupled to the base plate at an oblique angle and may retain the lightning rod. The utility pole mounted lightning rod may be operable on three-phase posts where contact with one of the primary wires passing directly over the top of the utility pole must be avoided.

A lightning protection system of a wind turbine is provided, including a blade lightning conductor arranged in a rotor blade of the wind turbine to extend into the hub, a stationary conductor to provide a blade grounding path to ground during a lighting strike, a brush arranged to electrically connect the blade lightning conductor and the stationary conductor, and a discharge means arranged to provide a separate discharge path from the blade lightning conductor to ground. Furthermore, a wind turbine, and a method of equipping a wind turbine with a lightning protection system, is also provided.

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.

The invention provides a lightning protection system for wind turbine blades with optimized injection means of lightning currents in conductive components of their shells. The injection means comprise a current receptor element (27; 47; 67) connected to the input cable of lightning currents and arranged over an area of a shell close to an electrically conductive component (22; 42; 62) and a current injection element (28; 48; 68; 69, 69′) arranged over the electrically conductive component (22; 42; 62) and connected to the current receptor element (27; 47; 67) by at least two distribution cables (31, 32; 51, 52, 53; 71, 72, 73, 74).

A hybrid lightning protection system. The hybrid lightning protection system may include a mast assembly. The mast assembly may include an upper portion including one or more upper mast sections; and a lower portion including one or more lower mast sections, wherein the lower portion supports the upper portion and is connected to a lower most one of the one or more upper mast sections of the upper portion. The hybrid lightning protection system may further include a base mast section, wherein the base mast section supports the mast assembly and is connected to a lower most one of the one or more lower mast sections of the lower portion; and one or more lightning dissipaters disposed at a top portion of an upper most one of the one or more upper mast sections of the upper portion.

Disclosed is an equipotential (EPZ) matting for creating an equipotential zone at a work site. A wire mesh of the EPZ matting is constructed by first cutting desired lengths of cable and laying the lengths of cable parallel and adjacent to each other. The cables are then connected to one another at regularly spaced intervals along the cables using pressed metal ferrules. The connections are staggered as between adjacent cables to create an evenly spaced, open mesh pattern when the wire mesh is tensioned perpendicularly to the longitudinal axes of the cables when initially laid along side one another. The wire mesh is opened and pulled tight for use as EPZ matting on the work site. After work is completed, the mesh is closed and bundled for transport, storage, and re-use.

The application relates to a grounding conductor and an electrical system including such a grounding conductor including a plurality of conductive aluminium strands where each such strand is provided with at least one sheath of an electrically conductive polymer material having a volume resistivity (ρ) below 100 Ω.Math.cm.