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 strike fault monitoring system for a wind turbine generator system and a lightning protection system (110) thereof, wherein the lightning strike fault monitoring system for the wind turbine generator system includes the lightning protection system. The lightning protection system (110) comprises a main body (101) provided with a blind hole (1011), a core (102), a connecting member (103) made of gasifiable material, a first elastic member (104), a second elastic member (105), a sealing cover (106), a bottom plate (107), and a switch used for connecting between an external signal source and a detecting terminal. The core (102) and the first elastic member (104) are respectively accommodated in the blind hole (1011), and the core (102) is connected to the main body through the connecting member (103). One end of the first elastic member (104) abuts against the core (102), and the other end is connected to the bottom wall of the blind hole (1011). One side of the sealing cover (106) is connected to the bottom plate (107) through the second elastic member (105), and the other side of the sealing cover (106) abuts against the core (102). The switch is mounted on the bottom plate (107). The lightning protection system (110) can accurately provide electrical signals for the detecting terminal, so that maintainer can be accurately aware of the occurrence of a lightning strike in order to perform maintenance and troubleshooting of lightning strike failure, thereby improving safety.

A disconnector device including an isolator connected between a first terminal and to a second terminal, and a sleeve positioned around the isolator and moveable between an un-extended position prior to the isolator operating and an extended position after the isolator operates, the sleeve being configured to trap debris produced by operation of the isolator.

A multifunctional surfacing material capable of providing lightning strike protection (LSP) and burn-through resistance. In one embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers, at least one of which contains one or more fire retardant compounds. In another embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers one of which is a thermally-stable layer. The surfacing material is co-curable with a composite substrate, e.g. prepreg or prepreg layup, which contains fiber-reinforced matrix resin.

Provided is an electric charge dissipation system for a wind turbine blade in compliance with lightning protection system and/or with the capacity of mitigating dirt problems in wind turbine generator blades. Also provided is the wind turbine blade including the electric charge dissipation system. Further provided is a method for dissipating electric charges in a wind turbine blade.

A wind turbine rotor blade comprising a lightning protection system. The lightning protection system has at least one receptor, a lightning protection conductor and a further element. A portion of the lightning protection conductor is in electrical contact with the further element by a connector. The connector has a screw with a collar as well as a nut with a female thread and a collar. The nut and the screw can be screwed together.

A charge dissipation plate for aircraft electronic systems comprises a machined metal plate 1 have at least one through opening 2a, 2b, 2c machined therein and an integrally formed collar 3a, 3b, 3c associated with and extending around the or each opening 2a, 2b, 2c. The or each collar 3a, 3b, 3c upstands from the plane of the plate 1 and has a threaded outer surface 4a, 4b, 4c. The or each collar 3a, 3b, 3c forms a housing for receiving an electronic connector therein, the threaded outer surface 4a, 4b, 4c, in use, being engagable by a mating threaded connector for connecting with the electronic connector mounted in the collar.

The present apparatus, system and method solves the problems of the prior art by enabling substantial dissipation of an electrical energy surge coming from communications antenna which has been struck by lightning. The apparatus is for mounting to an exterior of a building at or near communications antenna also located at the exterior of the building. The apparatus is connected with incoming coaxial cables extending from exterior mounted antenna and with outgoing coaxial cables which extend from the apparatus to communications equipment housed within a communications center. The lighting strike surge travels from antenna, along the incoming coaxial cable and is redirected within the apparatus by polyphasers which trip at capacity to redirect the surge to three separate grounding bars and prevent the surge from continuing along outgoing coaxial cables leading to communications equipment thus safely dissipating surge and shielding communications equipment.

A multifunctional surfacing material capable of providing lightning strike protection (LSP) and burn-through resistance. In one embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers, at least one of which contains one or more fire retardant compounds. In another embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers one of which is a thermally-stable layer. The surfacing material is co-curable with a composite substrate, e.g. prepreg or prepreg layup, which contains fiber-reinforced matrix resin.

A lightning protection system of an aircraft includes a wall defining an inner surface and an outer surface. The outer surface is configured to come into contact with a mass of air located around the aircraft. The lighting protection system also includes at least two electrically conductive lighting traps received in holes traversing the wall and at least one strip with pellets having an electrically insulating substrate and electrically conductive pellets spaced apart from one another on the electrically insulating substrate. The strip with pellets is fastened on the wall by the two lightning traps. The strip with pellets is attached on the inner surface of the wall.