Provided is a lightning protection system for a carbon pultruded blade including a stack of carbon pultruded layers having at least a bottom layer and a top layer, each layer having a first end and a second end; the stack defining a tip-region, a root-region, and a mid-region; at least one lightning conductor extending along the stack from the tip-region to the root-region; and a plurality of electrical connections connecting the stack of layers with the lightning conductor, each end of each layer is electrically connected with the lightning conductor by one of the electrical connections; and each electrical connection that connects one of the ends of the top layer with the lightning conductor is electrically connected with the bottom layer. A carbon pultruded blade is also provided.

The invention relates to a rotor blade of a wind turbine, comprising at least one girder (2), at least one protective layer (4) which is arranged on the at least one girder (2) on the rotor blade outer side, wherein the at least one protective layer (4) is designed to be electrically conductive and connected to a lightning conductor (16), wherein at least one electrically insulating insulator layer (3) which is arranged between the at least one protective layer (4) and the at least one girder (2).

A spar cap for a wind turbine blade of a wind turbine, the spar cap including at least one elongated beam is provided. The spar cap includes at least one electrically isolating material cover and at least one electrically conductive material cover, wherein an entire circumference of the beam is enclosed by at least one electrically isolating material cover and the entire circumference of the at least one electrically isolating material cover is enclosed by at least one electrically conductive material cover, whereby the electrically conductive material cover has at least one electrical interface for electrically connecting it to a down conductor of the wind turbine blade.

The invention relates to a wind turbine blade being a shell body made of a composite material and having a root end and a tip end, an outer surface, a pressure side and a suction side, a trailing edge and a leading edge, and additionally a lightning protection system. The lightning protection system comprising at least one lightning receptor provided with an outer surface arranged freely accessible in, on or at the outer surface of the blade at the tip end of the blade and a lightning conductor made of electrically conductive material extending within the shell body along substantially the entire longitudinal direction of the blade. The lightning receptor and the lightning conductor are electrically connected by means of a connection area. At least a part of the outer surface, optionally the whole of the outer surface of the receptor being freely accessible is formed of carbon such as graphite.

A containment shell for a magnetic pump, the shell comprising: a body section having a continuous side wall defining a chamber, and an end wall closing the chamber at one end, the chamber being open at the other end, wherein the body section and the end wall are integrally formed from a matrix material in which chopped carbon fibre material is distributed.

A rotating machine includes a shaft, a first impeller wheel, and a second impeller wheel. The rotating machine also includes a first seal assembly including a first carbon ring disposed about the shaft, with the first carbon ring having a first carbon surface. The first seal assembly also includes a first mating ring disposed about the shaft, with the first mating ring having a first mating surface facing and configured to contact the first carbon surface. The rotating machine additionally includes a second seal assembly including a second carbon ring disposed about the shaft, with the second carbon ring having a second carbon surface. The second seal assembly also includes a second mating ring disposed about the shaft, with the second mating ring having a second mating ring surface facing and configured to contact the second carbon surface.

A rotating machine includes a shaft, a first impeller wheel, and a second impeller wheel. The rotating machine also includes a first seal assembly including a first carbon ring disposed about the shaft, with the first carbon ring having a first carbon surface. The first seal assembly also includes a first mating ring disposed about the shaft, with the first mating ring having a first mating surface facing and configured to contact the first carbon surface. The rotating machine additionally includes a second seal assembly including a second carbon ring disposed about the shaft, with the second carbon ring having a second carbon surface. The second seal assembly also includes a second mating ring disposed about the shaft, with the second mating ring having a second mating ring surface facing and configured to contact the second carbon surface.

A monitoring system for a wind turbine blade, wherein the wind turbine blade includes an electrically conducting or semi-conducting structural component and a lightning protection system having a down conductor electrically connected to an lightning receptor, wherein the down conductor is electrically connected to the structural component by an equipotential connector, such that, a network of electrical impedances including the structural component, the equipotential connector and the down conductor is formed, whereby the hybrid monitoring system includes, a sensing device for the network, including a transmitter for emitting an electrical pulse into the network via a first terminal and a receiver for receiving a reception pattern of the electrical pulse from the network via a second terminal, and an evaluation device for evaluating the reception pattern to determine a first health information regarding the lightning protection system, and a second health information regarding the structural component, is provided.

Provided is a wind turbine blade for a wind turbine, the wind turbine blade including a support element having first fibers being electrically conductive, and a fiber material having second fibers being electrically conductive, wherein the fiber material has a free portion and an overlapping portion which is at least partially attached and electrically connected to the support element, wherein an extension direction of the second fibers changes along an extension path of the second fibers, wherein a first angle is provided between the second fibers in the overlapping portion and the first fibers, wherein a second angle is provided between the second fibers in the free portion and the first fibers, and wherein the second angle is larger than the first angle.

Provided is a wind turbine blade for a wind turbine, the wind turbine blade including an electrical conductor extending in a longitudinal direction of the wind turbine blade, and a carbon fiber material being electrically conductive and having a first portion which is arranged beside the electrical conductor, a second portion which is connected to the first portion and is attached and electrically connected to the electrical conductor, and a third portion which is connected to the second portion and at least partially overlaps with the first portion. Due to such an electrical connection between the electrical conductor and the carbon fiber material arcing and, thus, delamination of carbon can be avoided when conducting current of a lightning strike.