The invention relates to a method for designing a lightning protection system for the exterior lightning protection of buildings and systems and to an insulated lightning arrester device related thereto. The lightning arrester of the lightning protection system is at least partly designed as an insulated electric conductor with a conductive layer or casing on the insulation, and conductive structures can be found in the respective building or the respective system, wherein the structures are potentially exposed to inductions which occur in the event of a lightning current to be arrested, and correspondingly the conductive layer on the insulated conductor together with the respective conductive structure forms a secondary loop.

A fracturing system includes a plurality of electrical apparatuses, a plurality of fuel-driven apparatuses and a grounding system. The grounding system includes a first grounding metal wire, a second grounding metal wire, and a first grounding terminal. The first grounding terminal is spaced from each of the electrical apparatus and the electric-power supply apparatus by one or more distances. Each of the plurality of electrical apparatuses is connected to the first grounding metal wire and is connected to the first grounding terminal through the first grounding metal wire. Each of the plurality of fuel-driven apparatuses is connected to the second grounding metal wire and is connected to the first grounding terminal through the second grounding metal wire. The first grounding metal wire and the second grounding metal wire are connected to the first grounding terminal in parallel.

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 region of a positive charge formed around an arrester is made as small as possible to effectively suppress generation of an upward streamer. An inner electrode body to be grounded, an outer electrode body provided to surround the inner electrode body with a predetermined gap, an electrical insulating layer provided in the gap to hold the inner electrode body and the outer electrode body in an electrically insulated state, and a support that supports at least one of the inner electrode body and the outer electrode body are included, in which the inner electrode body is formed in a rod shape, and the outer electrode body is formed in a cylindrical shape.

A lightning rod for protecting an antenna system involves a lightning rod having a plurality of sections. Each section of the plurality of sections has a dimension. The dimension is less than a quarter of a wavelength according to an operating frequency of the antenna system to be protected. The plurality of sections is inductively coupled. The lightning rod can also be part of a group of lightning rods, and a system of a lightning rod or a group of lightning rods with an antenna system.

A system and method are disclosed for an electrical earthing or grounding system to protect electrical systems and structures. Such systems and structures are efficient at dissipating broadband energy. An earthing mix system in contact with a grounding electrode is separated into functional components; a conductive earthing mix which is in contact with an electrical conductor and an impedance transitioning earthing composition which is in contact with the conductivity earthing mix. The conductive earthing mix absorbs, radiates, conducts, and dissipates electrical energy. The impedance transitioning earthing mix acts as a lossy impedance matching media to reduce reflections and improve energy transfer. A conductive slurry mix fills in voids and aids in contact between the other elements. A grounding electrode system connects an electrically conductive electrode with an earthing mix system to achieve reduced impedance mismatch between the local soil and the grounding system itself while expanding the bandwidth of the overall system's grounding capability beyond traditional solutions.

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 electrically grounded and corrosion-protected assembly includes a metallic structure. At least a portion of the metallic structure is buried in the earth. A water impermeable and electrically conductive cementitious surround is applied to at least a section of the portion that is buried in the earth. The surround is in direct contact with the section and is between the section and the earth.

A multilayer protective covering can protect a surface from lightning strikes. The covering includes a bottom conductive layer affixed to the surface and having a first opening that is aligned with a grounding connection so that the grounding connection is exposed through first opening and not in contact with the bottom conductive layer. The covering also includes a dielectric layer affixed to the bottom conductive layer and having second opening aligned with the grounding connection so that the grounding connection is exposed through second opening and not in contact with the dielectric layer. The covering additionally includes a top conductive layer affixed to the dielectric layer and covering the grounding connection. The top conductive layer directs electrical current from a lightning strike on the surface to the grounding connection.

Provided is an electromagnetic grounding arrangement for power cables of a wind turbine that includes a tower mounted on a foundation, which electromagnetic grounding arrangement includes an electrically conductive sheet including at least one aperture through which a power cable passes; a first current path from a jacket of the power cable to the electrically conductive sheet; and a second current path from the electrically conductive sheet to ground.