摘要:
A non-liquid immersed transformer is provided. The transformer comprises a magnetic core and a coil winding forming a plurality of winding turns around the magnetic core and a cooling system. The cooling system comprises a heat exchanger, a main feeding pipe and a main return pipe, and a cooling pipe for the flow of a cooling fluid. The cooling pipe extends at least partly along the coil winding between a first point adjacent to an end of the coil winding, and a second point adjacent to the other end of the coil winding. The cooling pipe also comprises a plurality of convolutions to extend the path of the cooling fluid between one end of the winding and one of the main feeding pipe and the main return pipe
摘要:
A dry type cast-coil transformer having a voltage rating of 1 Kv and above, including: at least one coil with a plurality of conductor turns; a cast comprising a polymeric resin, encompassing the coil and having a cast surface; a ferromagnetic core on which the coil with the encompassing cast is mounted; an insulated cable termination connected to the coil, wherein the connection point between the insulated cable termination and the coil is within the cast, and wherein a flexible portion of the insulated cable termination further extends from the cast surface outwards and comprises a plurality of metal wires.
摘要:
A non-liquid immersed transformer is provided. The transformer comprises a magnetic core and a coil winding forming a plurality of winding turns around the magnetic core; a cooling system and a first conductive connector. The cooling system comprises a cooling pipe for the flow of a cooling fluid, the cooling pipe extending along the coil winding and comprising a first point adjacent to a turn of the coil winding, and a second point adjacent to another turn of the coil winding. The conductive connector is arranged at one of the first and second points, to electrically connect an inner side of the cooling pipe with a turn of the coil winding.
摘要:
The present disclosure relates to a high voltage winding (1) for a single electrical phase of a high voltage electromagnetic induction device, wherein the high voltage winding (1) comprises: a first winding part (3), and a second winding part (5), wherein the first winding part (3) comprises: a first conductor, a first solid electrical insulator circumferentially enclosing the first conductor, and a first semi-conductive sheath circumferentially enclosing the first solid electrical insulator, wherein the first semi-conductive sheath is earthed or connected to an electric potential that is lower than a rated voltage of the high voltage winding (1), and wherein the second winding part (5) comprises: a second conductor, and a second solid electrical insulator circumferentially enclosing the second conductor and forming an outermost layer of the second winding part.
摘要:
Cooling arrangement for a dry-type transformer, the arrangement comprising: a blowing equipment configured to blow a gas flow, an opening positionable in a clamping structure of the transformer, the opening being 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 comprising an electric protecting means for dielectric protection of the clamping structure; a transformer comprising such cooling arrangement is also disclosed.