The lightning induction device includes a projection rod, an intermediate conductor, a lowermost conductor, and a switch unit. The projection rod, the N intermediate conductors, and the grounded lowermost conductor are coupled in an upward direction via the N+1 switch units, and all of the switch units are turned on, so that the projection rod and all of the intermediate conductors are instantaneously grounded.

The present disclosure relates to a shielding device against atmospheric discharges. The device comprises a first conductive element and a second conductive element that passes through the first conductive element, wherein both conductive elements are electrically insulated by means of a first insulating body, and a second insulating body that are connected to the ends of the first conductive element and the second conductive element. Additionally, the device comprises a third conductive element that passes through the second conductive element that is connected to a fourth conductive element. The fourth conductive element is connected to one of the ends of the first and second conductive elements, and the shape of the fourth conductive element prevents the generation of a corona effect in the presence of an electric discharge. In addition, the third conductive element allows the lightning shielding device to be connected to a grounding element, thus concentrating the electric discharge only in the lightning shielding device, acting as an electric capacitor, and producing the flow of electric charge towards the grounding element, preventing the discharge from spreading to structures or people around.

A low voltage cabinet is provided that is separate from but integral with the high voltage side compartment with a layout providing a current-limiting circuit breaker, switched fuse or other means of current interrupting that protects the power section from overload. Provides better low voltage geometry for linemen and protects from overload and lightning.

A system for electrical strike dissipation includes a fastener, a composite laminate, and a structural element. The fastener has a tapered head and a shank. The composite laminate includes a first composite ply and a second composite ply. The first composite ply defines a tapered bore, and has multiple first tow groups. Some first tow groups have three or more conductive fibers stacked directly on each other. The three or more conductive fibers are operational to conduct current of an electrical strike. The tapered bore extends through the first composite ply and is sized to receive the tapered head. The second composite ply defines a straight bore, and has multiple second tow groups. The straight bore extends through the second composite ply and is sized to receive the shank. The structural element is aligned with the composite laminate and is secured to the composite laminate by the fastener.

One example includes a method for generating a grounding solution for lightning strikes. The method includes determining a geographic location of a lightning-sensitive electrical device and receiving soil resistivity data of soil at the geographic location and a surrounding geographic region. The method also includes implementing a grounding solution algorithm. The algorithm includes converting the soil resistivity data to resistance values, calculating a quantity of grounding rods for the grounding solution based on the resistance values relative to a predefined ideal resistance value, and calculating a safety distance of mounting the grounding rods with respect to the lightning-sensitive electrical device based on the resistance values. The method further includes generating installation instructions for implementing the grounding solution by mounting the grounding rods in the geographic region based on the calculated quantity of grounding rods and the calculated safety distance.

A floating seal washer for protection from electromagnetic effects includes a washer and a seal. The washer has an annular shape that includes a central opening. The annular shape defines a height, an inside diameter and an outside diameter along a longitudinal axis. The seal has a circular shape that includes a central aperture. The circular shape defines an elevation, an inner surface and an outer surface along the longitudinal axis. The seal being set into the inside diameter of the washer. A fastener assembly for protection from electromagnetic effects includes a bolt, a floating seal washer and a nut. The seal and the washer float relative to each other as the nut is tightened on the bolt. Methods for protection from electromagnetic effects in conjunction with use of the fastener assembly and the floating seal washer are also provided.

There is provided a lightning strike protection material assembly including a lightning strike expanded metal foil layer with a lightning strike expanded metal foil, and including a resin infused scrim layer having a non-metallic scrim infused with an infused resin having a tailored viscosity and a tailored cure profile. The lightning strike protection material assembly is configured for laying up on, and co-curing with, an uncured composite laminate assembly having a plurality of structural ply layers preimpregnated with a structural resin. The structural resin has a structural resin viscosity and a structural resin cure profile that are different from the tailored viscosity and the tailored cure profile, to prevent mixing of the structural resin and the infused resin during co-curing, to allow the infused resin to effectively encapsulate the lightning strike expanded metal foil, and to provide a defined resin boundary. A cured lightning strike protection composite structure is formed.

A lightning protection structure includes an antenna jointing interface, a main jointing rod, a cavity filter, a printed circuit board, an induction coil and a notch filter. The main jointing rod passes through a wall surface of the cavity filter. The main jointing rod is coupled to the antenna jointing interface. The induction coil is arranged in the notch filter. The induction coil includes a spiral body portion, a first end portion and a second end portion. The first end portion and the second end portion extend from the spiral body portion in opposite directions. The first end portion of the induction coil extends through the top cover of the notch filter. The first end portion of the induction coil is coupled to the printed circuit board. The second end portion of the induction coil is coupled to a bottom wall of the notch filter.

A lightning rod with an electric double layer and electric dipole moment type discharge amplification function, the lightning rod including: a support member (100) for moving a lightning current to the ground; an emission member (200) fitted to the support member (100) to collect charges of the ground according to the approach of a thundercloud and thus emit a large number of ions with the opposite polarity to the polarity of the thundercloud; ground charge chargers (300) fitted to the support member (100) and having spaces formed therein to charge the charges of the ground; an insulation member (400) disposed on top of the emission member (200); and discharge induction members (500) fixedly disposed on top and underside of the emission member (200) by means of the insulation member (400).

The present disclosure relates to a current transfer element (100) configured to be mounted on a first component (300) of a machine, the machine comprising a second component (200) configured to rotate with respect to the first component and the second component comprising an electrical conductor. The current transfer element (100) comprises a floating conductor assembly, and a support (120), and the floating conductor assembly comprises a floating chassis (111) resiliently connected to the support (120), the floating chassis arranged on a roller (112) which is configured to contact the second component (200), and carrying a floating conductor (113) configured to transfer current from the electrical conductor of the second component (200). The present disclosure further relates to generators and electrical machines comprising floating conductor assemblies, and direct drive wind turbines comprising such generators.