Abstract: A coil arrangement for an electrical transformer is disclosed. The coil arrangement comprises a coil made from cast resin. The coil arrangement further includes a support base for supporting the coil. The coil arrangement further includes a coil block arranged between the support base and the coil. The coil arrangement further includes a coupling device configured for provision of a form fit between the support base and the coil block and extending into a recess of the coil block. The coupling device comprises a sliding member extending into the recess and configured for sliding relative to the support base along a sliding direction, and the coupling device comprises an elastic member providing a force along the sliding direction and pushing the sliding member away from the support base and/or towards the coil block.

Abstract: Embodiments relate to an insulation assembly for use in a transformer, a transformer assembly for use in a transformer, and a dry type transformer. The insulation assembly includes a plurality of tubular insulation barriers adapted to be arranged around a transformer inner coil to electrically isolate the inner coil from a transformer outer coil, each pair of adjacent tubular insulation barriers being separated by a gap; and an air blocking element arranged in at least one gap between the plurality of tubular insulation barriers to at least partially block an air flow from passing through the at least one gap. According to various embodiments, the air blocking element blocks the cool air from passing through the at least one gap. Thus, more cool air may pass through gas channels near to the inner/outer coils and take away more heat generated by the transformer, thereby improving the cooling efficiency of the transformer.

Abstract: A transformer including a core, a plurality of winding coils arranged in proximity of the core to inductively couple to the core, a plurality of air-gaps to allow air flow in the proximity of at least one of the core and winding coils, and an air-flow re-director including a plurality of independently adjustable surfaces angled to re-direct a flow of a portion of a cooling air received into the re-director into at least one pre-determined air-gap.

Abstract: A support structure is configured to be arranged at least partially in a space provided between at least two coil segments of a transformer. The support structure comprises an elongated body having at least a first side and a second side. The support structure comprises at least one fluid passage opening provided in at least a section of the elongated body. The at least one fluid passage opening is configured to allow a fluid to pass therethrough from the first side to the second side. A transformer has a support structure arranged in a space between at least two coils segments of the transformer.

Abstract: A heat exchanger package for a dry-type transformer is provided. The heat exchanger package includes a package housing including an air inlet and an air outlet and adapted to fix to the dry-type transformer; and a first heat exchanger located in the package housing and between the air inlet and the air outlet, the first heat exchanger arranged at a first angle of inclination with respect to a first inner surface of the package housing.