A system or method for monitoring an electric power lightning arrester including an arrester current sensor providing an arrester current measurement, and an arrester voltage sensor providing an arrester voltage measurement. The system detects a switching signature based on the arrester current measurement or the arrester voltage measurement distinguished from background noise and lightning signatures and computes a measured arrester impedance based on the arrester current and arrester voltage measurements. The system then compares the measured arrester impedance to a nominal or historical arrester impedance, determines that the arrester is faltering based on the comparison of the measured arrester impedance to the nominal or historical arrester impedance, and places an order for replacement of the arrester based on the determination that the arrester is faltering. The system operator then replaces the arrester during a fair-weather, typically off-peak period to avoid failure of the arrester during a lightning strike.

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 composite structure includes a composite member and a fastener. The composite member has a through hole. The fastener is inserted in the through hole and couples the composite member and another part to each other. The composite member includes an electrically-conductive composite member provided at least in part or all of a through-hole portion. The through-hole portion is a portion, of the composite member, having the through hole. The electrically-conductive composite member has a thickness that is greater in a portion, of the electrically-conductive composite member, included in the through-hole portion than in a portion, of the electrically-conductive composite member, other than the through-hole portion.

An arrester is disclosed capable of coupling a cable accessory utilizing a push on method. The arrester comprises a body having a surge arrester portion, a receiving portion, and a conductive contact. The receiving portion is configured to couple to a coupling fastener comprising a first side, second side, and a latching mechanism. Various methods of engaging and disengaging the arrester to a cable accessory utilizing the coupling fastener are disclosed.

Provided in the present disclosure is an arc compression-based arc-extinguishing lightning-protection gap device. The device comprises a lightning protector main body and an arc-striking electrode. The arc-striking electrode is fixedly mounted at one end of the main body. The other end of the main body is fixedly mounted, by means of a link fitting, to a crossarm or one end of an insulator string. The lightning protector main body is provided with an arc-extinguishing path consisting of several arc-extinguishing channels in a repeated Z-shaped arrangement. An arc-extinguishing tube at an inlet of a first arc-extinguishing channel of the arc-extinguishing path is connected to the arc-striking electrode via an arc-guiding rod, and an arc-extinguishing tube at an outlet of a last arc-extinguishing channel is connected to the link fitting. A three-way tube is provided at a joint of two adjacent arc-extinguishing channels; two ends of the three-way tube are each provided with one arc-guiding electrode; and the arc-guiding electrode has one end extending into the three-way tube and the other end connected to a nearby arc-extinguishing tube via direct contact or a wire. The present disclosure has the advantages of simple structure, reasonable design, improved arc-extinguishing performance, and stable operation.

An elbow arrester with a T-body is disclosed capable of coupling with an apparatus for protection from transient over voltage, and coupling with additional cable accessories, without having to loosen the initial connection with the coupled apparatus. The elbow body of the T-body arrester has a first portion, and a second portion protruding from an intermediate section of the first portion to define a T-body. A receiving feature is located within the first portion extending towards a first end, while a male feature is coupled to a second end of the first portion, opposite from the receiving feature. A coupling fastener is integrally molded into the first portion, providing for an apparatus coupled to the coupling fastener to be decoupled without loosening the connection of another apparatus connected to the T-Body elbow. Further, decoupling the other apparatus does not loosen the apparatus coupled to the coupling fastener.

A lightning protection system can include a socket, a receptor plug, a tip receptor, and a tip receptor mount. The socket can extend at least partly through a blade wall, and can include a socket body, a first retention shoulder, and a plurality of first teeth. The receptor plug can include a plug body, a plug conductor, a second retention shoulder, and a plurality of second teeth. The first retention shoulder can engage the second retention shoulder to secure the receptor plug to the socket. The first plurality of teeth can engage the second plurality of teeth to resist rotation of the receptor plug. The tip receptor mount can include latticed bonding wings that can be secured to a wind turbine blade with bonding material. The receptor plug can be accessed to be secured to the socket via an opening in another socket that is formed into the blade wall.

A lightning protection device includes a carrier module and a transmission module. The carrier module includes a housing unit defining an accommodating space and having a plurality of spaced-apart first vents and a plurality of spaced-apart fixing portions. An ion generating unit is disposed in the accommodating space for generating positive and negative ions. The transmission module includes a plurality of transmission units each including a transmission lever that has a lower end, an upper end, and a guide groove extending from the lower end to the upper end for guiding and diffusing the positive and negative ions generated by the ion generating unit to move toward the direction of the upper end, and a sensing probe connected to the upper end.

An aircraft component incorporated in a current return network (CRN) employs a composite structural element having a web. At least one flange is connected to the web. At least one metallic conductive layer is integrated with and extends the length of the web. The at least one metallic layer is configured to electrically bond to an aircraft system and provide a ground path.

A lightning protection structure is provided, which includes an insulation bottom layer, a graphite layer on the insulation bottom layer, an insulation shell on the graphite layer, and an electrically conductive component. A part of the electrically conductive component is disposed on the insulation shell, and another part of the electrically conductive component is in contact with the graphite layer.