An insulator includes an insulation tube, an insulation foam body disposed in the insulation tube, and a curable adhesive disposed between the insulation foam body and an inner wall of the insulation tube. The curable adhesive after being cured is softer than both the insulation foam body and the insulation tube.

A composition comprises, based on the total weight of the composition, 50 wt % to 90 wt % of a polyetherimide; and 10 wt % to 50 wt % of a filler comprising talc, titanium dioxide, zirconium oxide, neutral aluminum oxide, or a combination comprising at least one of the foregoing; wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops determined according to ASTM D-3638-85.

A composition comprises, based on the total weight of the composition, 50 wt % to 90 wt % of a polyetherimide; and 10 wt % to 50 wt % of a filler comprising talc, titanium dioxide, zirconium oxide, neutral aluminum oxide, or a combination comprising at least one of the foregoing; wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops determined according to ASTM D-3638-85.

The invention provides a cable grommet element (1) for sealed entry of an electricity cable (100) into a housing (1000), wherein the grommet element (1) comprises a body (200), an engagement element (50), a flexible projection (26), and a cable transit (300), wherein (i) the body (200) comprises a first wall (10), a second wall (20), and a side wall (30) connecting the first wall (10) to the second wall (20); (ii) the engagement element (50) protrudes from the first wall (10) of the body (200), wherein the engagement element (50) comprises an engagement element side wall (51) and an engagement element top part (55), wherein the engagement element side wall (51) comprises a flexible rim (52) configured along a perimeter (59) of the engagement element side wall (51); wherein the engagement element (50) further comprises an alignment portion (56) protruding from the engagement element side wall (51); (iii) the flexible projection (26) protrudes from the second wall (20) of the body (200); and (iv) the cable transit (300) is configured for transit of the electricity cable (100) from the side wall (30) of the body (200) to the engagement element top part (55).

The invention provides a cable grommet element (1) for sealed entry of an electricity cable (100) into a housing (1000), wherein the grommet element (1) comprises a body (200), an engagement element (50), a flexible projection (26), and a cable transit (300), wherein (i) the body (200) comprises a first wall (10), a second wall (20), and a side wall (30) connecting the first wall (10) to the second wall (20); (ii) the engagement element (50) protrudes from the first wall (10) of the body (200), wherein the engagement element (50) comprises an engagement element side wall (51) and an engagement element top part (55), wherein the engagement element side wall (51) comprises a flexible rim (52) configured along a perimeter (59) of the engagement element side wall (51); wherein the engagement element (50) further comprises an alignment portion (56) protruding from the engagement element side wall (51); (iii) the flexible projection (26) protrudes from the second wall (20) of the body (200); and (iv) the cable transit (300) is configured for transit of the electricity cable (100) from the side wall (30) of the body (200) to the engagement element top part (55).

A method of manufacturing a winding assembly for an electrical machine, the method comprising: forming, by three-dimensional, 3D, printing, an electrically insulating body comprising a channel defining a winding path, the channel having an inlet and an outlet; heating the electrically insulating body to a temperature above the melting point of an electrically conducting material; flowing the electrically conducting material through the inlet to the outlet to fill the channel; and cooling the electrically insulating body to solidify the electrically conducting material within the channel, thereby forming said winding assembly.

A method of manufacturing a winding assembly for an electrical machine, the method comprising: forming, by three-dimensional, 3D, printing, an electrically insulating body comprising a channel defining a winding path, the channel having an inlet and an outlet; heating the electrically insulating body to a temperature above the melting point of an electrically conducting material; flowing the electrically conducting material through the inlet to the outlet to fill the channel; and cooling the electrically insulating body to solidify the electrically conducting material within the channel, thereby forming said winding assembly.

An electrical bushing is specified, the bushing including a flange with a lower part and an upper part affixed to one another and further including a core surrounded by the flange, wherein the flange is affixed to the core by a locking compound disposed in a volume of a joint between the flange and the core, and wherein the volume of the joint further includes a compressible material, the compressible material being configured to compress or expand in response to a change in the volume of the joint. Furthermore, a method of producing an electrical bushing is specified.

An electrical bushing is specified, the bushing including a flange with a lower part and an upper part affixed to one another and further including a core surrounded by the flange, wherein the flange is affixed to the core by a locking compound disposed in a volume of a joint between the flange and the core, and wherein the volume of the joint further includes a compressible material, the compressible material being configured to compress or expand in response to a change in the volume of the joint. Furthermore, a method of producing an electrical bushing is specified.

A cable includes an insulating part and one or more conducting parts disposed inside the insulating part. The insulating part includes a polymer resin layer with a product of shrinkage ratios C.sub.MD*TD, which is expressed as a product of a longitudinal shrinkage ratio and a transverse shrinkage ratio, of less than 0.24.