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 one-part or two-part air terminal for protecting a structure against lightning strikes. A flexible adapter, such as a spring, attaches an upper air terminal to a lower air terminal or a one-piece air terminal and base. The flexible adapter allows a flexible engagement between parts of the air terminal and has an internal passageway. A elongate tether couples parts of the air terminal in case the upper air terminal or one-piece air terminal breaks, so as to avoid a broken part from injuring individuals around. The elongate tether may be a ball chain or other type of chain. The elongate tether runs through the internal passageway of the flexible adapter. A base mounts to the one-part or two-part air terminal and mounts the air terminal to the structure. A grounding wire grounds the base to the grounding rod.

The present disclosure provides an aircraft (10), as well as systems and methods for reducing current flow to electrical systems onboard an aircraft (10). A signal return network (220) is spaced from a composite structure (210) and first and second non-conductive components (240) are attached between the signal return network (220) and the composite structure (210) at first and second attachment points (242, 244), respectively. A conductive component (250) is attached between the signal return network (220) and the composite structure (210) at a third attachment point (246) for electrically coupling the signal return network (220) to the composite structure (210).

Provided is a one-touch terminal for electric connection of an electric cable to industrial electrical equipment including a lightning arrester. The one-touch terminal includes a metal fitting cap and a biter capable of fastening and electrically connecting any of various electric cables (5 m PDC, etc.) including a lead wire to an upper-electrode-integrated-type coupling socket or to a coupling portion of an upper-electrode-separated-type metal fitting body of a lightning arrester in a one-touch manner. The metal fitting cap, in which a wedge-type biter having an elastic-pressing-type biting/releasing structure is mounted, is detachably mounted to a metal fitting body (or a coupling socket), thereby rapidly and precisely performing electric connection (fastening) of an electric cable (5 m PDC, etc.) to any of various connection metal fittings (a bushing terminal, a terminal clamp, a bus-bar-type terminal board, etc.).

A fully insulated tip unit (1) for a lightning protection system for a wind turbine blade (2) is disclosed, comprising an electrically conducting tip (3), which tip consists of an external part (4) and an internal part (5), at least one side receptor base (6), an internal tip unit conductor (8), an insulated electric cable (9) for forming the outermost part of a down conductor (10), and a connection element (12) for establishing electrical connection between the insulated electric cable and the other conducting parts of the tip unit, wherein the internal part of the tip, the side receptor base(s), the internal tip conductor, the connection element and one end of the insulated electric cable are all embedded by casting in an insulating material (13) leaving only the external part of the tip and the other end of the insulated electric cable uncovered by the insulating material. Furthermore, a wind turbine blade comprising such a tip unit is disclosed.

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.

Provided is a wind turbine including a hub connected to a rotatable shaft extending in an axial direction and at least one bearing supporting the shaft against a housing, wherein the housing includes an electrically conductive cage section, which surrounds at least partially an axial segment of the shaft, wherein the cage section is connected to the shaft by at least one first conduction means and at least one second conduction means, wherein the at least one first conduction means and the at least one second conduction means are arranged spaced both from each other in the axial direction, wherein the at least one bearing is arranged between the segment of the shaft and the cage section of the housing at an axial position in between the at least one first conduction means and the at least one second conduction means.

Provided is a lightning suppression device for wind turbine blades that is provided at a tip of a wind turbine blade and suppresses lightning struck on the wind turbine blade, the device including: an electrical insulator attached to the tip of the wind turbine blade and formed of a non-conductive material; an internal electrode attached to the electrical insulator on a side opposite to the wind turbine blade; and an external electrode attached to the electrical insulator so as to surround the internal electrode with a predetermined gap therebetween, wherein the electrical insulator is fixed to the tip of the wind turbine blade by a fixing member, and a ground line is connected to the internal electrode.

A dual protection inner seal washer employs a radially outward metallic portion having a dielectric coating and a radially inward polymeric portion engaging the metallic portion at an interface with an interference fit. The polymeric portion has at least one tapering compression surface to engage a surface of a structure proximate a hole and further has a fastener element contact surface to engage a mating surface on a fastener system element. Torqueing of the fastener element compresses the at least one compression surface inducing a predetermined pressure in the polymeric portion in a joint created by the fastener element and structure.

An equipotential bonding system can be provided for a lightning protection system that includes a mast assembly with an internal passageway that includes an internal surface, and a conductor that extends through the internal passageway. The equipotential bonding system can include a deflection member that is disposed at least partly within the internal passageway. The deflection member can be configured to urge the conductor into contact with the internal surface to form a conductive pathway between the mast assembly and the conductor.