731 results about "Solid insulation" patented technology

A wind-power unit has a wind turbine has an electric generator connected to the wind turbine. The stator of the generator has a winding formed of a high-voltage cable having a core of conducting material, a first layer of semiconducting material surrounding the core, an insulating layer of solid material surrounding the first layer, and a second layer of semiconducting material surrounding th solid insulation. The wind turbine has a plurality of turbine blades running vertically and being connected to a turbine shaft. The generator is arranged at the lower end of the turbine shaft. A wind-power plant; the use of a wind-power unit; and a method of generating electric power are described.

A high voltage transformer including a transformer housing. Internal components and provided in the transformer housing. The internal components are submerged in transformer oil and are provided with insulation for insulating a high voltage winding end. The insulation includes a shield ring arranged above the winding end and a pressboard structure formed in a zigzag pattern arranged around the winding end. The shield ring includes a core covered with a conducting layer and a continuous solid insulation layer outside the conducting layer. The insulation layer includes integrated solid insulation sections of which at least some among themselves having varying thickness. Also a shield ring and a method of manufacture the shield ring.

The invention discloses a solid insulation ring main unit, comprising a high-voltage switch unit; the high-voltage switch unit comprises a vacuum arc-extinguishing chamber and an isolation grounding switch device comprising an insulation cavity body; a line outlet end, a grounding end and a line inlet end electrically connected with a conductive rod are arranged on the insulation cavity body; a vacuum switch tube for grounding is fixedly arranged inside or outside the insulation cavity body; the static contact of the vacuum switch tube for grounding is electrically connected with the grounding end while the movable contact is provided with a grounding wiring part; the movable contact of the vacuum switch tube for grounding is in transmission connection with a grounding operative mechanism; an isolation disconnecting link is arranged in the insulation cavity body; one end of the isolation disconnecting link is a hinging end hinged to the line outlet end while the other end is a contact end; and a driving mechanism is connected onto the isolation disconnecting link in a transmission way. The isolation grounding switch is positioned in different work conditions by controlling the swinging of the isolation disconnecting link and the connecting / disconnecting states of the static and movable contacts in the vacuum switch tube.

An electromagnetic device comprises a magnetic field generating electrical circuit including a winding (1) having at least one electrical conductor (2). The winding comprises a solid insulation (4) surrounded by outer and inner layers (3, 5) serving for equalization of potential and having semiconducting properties. Said at least one electrical conductor (2) is arranged interiorly of the inner semiconducting layer (3). The invention also relates to methods for electric field control and production of a magnetic circuit as well as use of a cable for obtaining a winding.

It is described a single-phase or three-phase distribution electric transformer, of solid insulation, for use in aerial installation, in poles, in platforms or pedestals, or installation in underground distribution network for operation in air environment, semi-submerged or submerged. Such transformer comprises at least one high voltage winding (3) and at least one low voltage winding (2) concentrically assembled around a core column (1.2,1.3), the low voltage and high voltage windings (2,3) being electrically isolated from a solid material, a core window (20) being defined as a space between two core columns (1.2,1.3), the transformer comprising at least one electrical insulation sheet (4) assembled on at least a core window (20) of said transformer, the assembly of the electrical insulation sheet (4) being defined in the longitudinal direction (300) of the transformer. Such sheet (4) avoids the formation of spiral around the core by immersion water or conductive dust. The use of this dry transformer in the underground distribution networks in the cities offers more safety to the population, because the dry transformer does not explode, apart from eliminating the risk of environmental contamination through the leakage of oil from transformers in oil. Once the dry transformer of the invention does not explode, the underground installation chambers can be simpler and more economic once they do not need to be resistant to explosion.