A cooling arrangement for a dry-type transformer. The arrangement includes blowing equipment configured to blow a gas flow, and an opening positionable in a clamping structure of the transformer. The opening is configured to allow the gas flow to pass from the blowing equipment towards a winding of the transformer, so that the winding is properly cooled. The opening comprises an electric protecting means for dielectric protection of the clamping structure. A transformer including such cooling arrangement is also disclosed.

A cooling arrangement for a dry-type transformer. The arrangement includes blowing equipment configured to blow a gas flow, and an opening positionable in a clamping structure of the transformer. The opening is configured to allow the gas flow to pass from the blowing equipment towards a winding of the transformer, so that the winding is properly cooled. The opening comprises an electric protecting means for dielectric protection of the clamping structure. A transformer including such cooling arrangement is also disclosed.

A toroidal magnetic element. A plurality of coils is arranged in a toroidal configuration. Each coil may be a hollow cylinder, formed by winding a rectangular wire into a roll. The coils alternate with spacers, each of which may be a wedge. The coils may alternate in winding orientation, and the inner end of each coil may be connected, through a connection pin, to the inner end of an adjacent coil. Small gaps are formed between the coils and the wedges, e.g. as a result of each wedge having, on its two faces, a plurality of raised ribs, against which the coils abut. Cooling fluid flows through the gaps to cool the coils.

A toroidal magnetic element. A plurality of coils is arranged in a toroidal configuration. Each coil may be a hollow cylinder, formed by winding a rectangular wire into a roll. The coils alternate with spacers, each of which may be a wedge. The coils may alternate in winding orientation, and the inner end of each coil may be connected, through a connection pin, to the inner end of an adjacent coil. Small gaps are formed between the coils and the wedges, e.g. as a result of each wedge having, on its two faces, a plurality of raised ribs, against which the coils abut. Cooling fluid flows through the gaps to cool the coils.

A component includes a magnetic core having a body formed of a first material, defining a first opening and a second opening thereon. A duct formed of a second material extends at least partially through the body between the first opening and the second opening. The first opening and the second opening are in fluid communication by way of the duct.

A transformer cooling system is described. The transformer cooling system includes a dry transformer and a housing for the dry transformer. The dry transformer includes a core including a leg. Additionally, the dry transformer includes a winding body arranged around the leg. Further, a cooling channel extending in a direction of a longitudinal axis of the winding body is provided. Additionally, the transformer cooling system includes a heat exchanger adapted to dissipate heat from the housing. Further, the transformer cooling system includes a flow generating device arranged in the housing for providing a cooling flow in the cooling channel. The flow generating device is connected to the heat exchanger.

A transformer cooling system is described. The transformer cooling system includes a dry transformer and a housing for the dry transformer. The dry transformer includes a core including a leg. Additionally, the dry transformer includes a winding body arranged around the leg. Further, a cooling channel extending in a direction of a longitudinal axis of the winding body is provided. Additionally, the transformer cooling system includes a heat exchanger adapted to dissipate heat from the housing. Further, the transformer cooling system includes a flow generating device arranged in the housing for providing a cooling flow in the cooling channel. The flow generating device is connected to the heat exchanger.

An electric device for connection to a high voltage includes an active part having a magnetizable core and at least one winding arrangement, each surrounding a core section of the core and having windings inductively coupled together, forming cooling channels in the windings. A boiler is filled with insulating fluid and the active part is completely disposed therein. The boiler has at least one insulating fluid inlet and at least one insulating fluid outlet interconnected by a circulation system outside of the boiler having a cooling unit and a pump for circulating the insulating fluid. The electric device has improved cooling achieved by each insulating fluid inlet being connected to a distributing unit, which is disposed on one of the end sides of the winding assembly, via an insulating fluid line extending in the boiler, the distributing unit distributing cooled insulating fluid to the cooling channels.

An electric device for connection to a high voltage includes an active part having a magnetizable core and at least one winding arrangement, each surrounding a core section of the core and having windings inductively coupled together, forming cooling channels in the windings. A boiler is filled with insulating fluid and the active part is completely disposed therein. The boiler has at least one insulating fluid inlet and at least one insulating fluid outlet interconnected by a circulation system outside of the boiler having a cooling unit and a pump for circulating the insulating fluid. The electric device has improved cooling achieved by each insulating fluid inlet being connected to a distributing unit, which is disposed on one of the end sides of the winding assembly, via an insulating fluid line extending in the boiler, the distributing unit distributing cooled insulating fluid to the cooling channels.

A planar coil (10) of the present disclosure includes a base (1) having a first surface (1a) and including a magnet material, and a first metal layer (2a) located on the first surface (1a) and having voids (3).