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.

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.

A structural composite component, in particular for an aircraft or spacecraft, has a lightning strike protection layer, and a composite battery comprising a cathode layer, wherein the lighting strike protection layer is formed integrated with the cathode layer.

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.

A flat metallic structure having a multiplicity of openings and having a width between 6 and 1000 mm. The metallic structure is treated with a metallic impregnating material whose melting point is lower than that of the flat metallic structure, and wherein the conductivity of the metal before the impregnation is at least 15 S/m. A use of such a structure as lightning protection for fiber composite components, as well as fiber composite components having such a structure, and a method for the production of such fiber composite components.

A propeller blade assembly includes an airfoil having a base, a tip and a leading edge and a root extending from the base of the airfoil for attaching the airfoil to a hub. The assembly further comprises an electrically conductive sheath for electrically grounding the airfoil. The electrically conductive sheath is attached to the leading edge of the airfoil and extends from the base to the tip of the airfoil. The assembly further comprises an electrically conductive element for electrically connecting the electrically conductive sheath to the root or hub. Also disclosed is an electrically conductive sheath for grounding an airfoil and a method for assembling a propeller blade assembly.

An on-board system for evaluating the severity of a lightning strike, intended to be installed in the interior of an airplane and connected to an avionic system of the airplane. The system comprises four devices, a master device and three slave devices, each device comprising a magnetic-field sensor. The devices are placed pairwise symmetrically about a plane of symmetry of the airplane, vertically in line with the leading edge of the wing of the airplane and vertically in line with the trailing edge of the wing, respectively. The system allows an evaluation of the severity of a lightning strike to be obtained depending on the measured magnetic fields.