Secondary transformer bushing with integral sealing legs
View Patent ↗A secondary bushing with a sleeve for each conductive contact is disclosed. The secondary bushing is secured to a transformer wall by a mounting assembly and comprises a first side and second side. The first side is positioned within the transformer wall and includes a first conductor. The second side is positioned outside of the transformer wall and includes at least one cable connector that is coupled to a power cable. Instead of exposing the conductive contacts of the cable connector and power cable, a sleeve is inserted to insulate and seal each conductive contact.
1. A secondary bushing comprising:
a first conductor comprising an insulation bushing and at least one conductive connector;
a mounting flange;
a second conductor, comprising a plurality of cable connectors; and
at least one sleeve;
wherein the first conductor is positioned at a first side;
wherein the first side is coupled to a sealed enclosure with the mounting flange and positioned inside the sealed enclosure;
wherein the second conductor and the at least one sleeve are positioned at a second side positioned outside of the sealed enclosure;
wherein the at least one conductive connector of the first conductor is electrically coupled to the plurality of cable connectors of the second conductor;
wherein the at least one sleeve is coupled over at least one cable connector of the second conductor; and
wherein the at least one sleeve is configured to seal the at least one cable connector from a fluid when the second side is submerged by the fluid.
2. The secondary bushing of claim 1 , wherein the insulation bushing of the first conductor is composed of an oil resistant material.
3. The secondary bushing of claim 1 , wherein the mounting flange is composed of metal.
4. The secondary bushing of claim 1 , wherein the mounting flange is molded to an insulation material.
5. The secondary bushing of claim 1 , wherein the sleeve is cylindrical and substantially hollow, and wherein the sleeve is coupled to the at least one cable connector of the second conductor using an interference fit.
6. A secondary bushing comprising:
a first side;
a mounting assembly;
a second side;
a conductor; and
at least one sleeve;
wherein the conductor comprises a plurality of cable connectors;
wherein the conductor and the at least one sleeve are positioned at the second side; and
wherein the at least one sleeve is configured to seal at least one cable connector from a fluid when the second side is submerged by the fluid.
7. The secondary bushing of claim 6 , wherein the at least one sleeve is coupled to at least one cable connector.
8. The secondary bushing of claim 6 , wherein a housing of the first side and a housing of the conductor are composed of insulating material.
9. The secondary bushing of claim 6 , wherein the sleeve is substantially hollow and composed of EPDM.
10. The secondary bushing of claim 6 , wherein the sleeve is substantially hollow and composed of silicon rubber.
11. The secondary bushing of claim 7 , wherein the at least one sleeve is coupled to the at least one cable connector using an interference fit.
12. The secondary bushing of claim 7 , wherein the at least one cable connector comprises a spade connector.
13. A system comprising:
a sealed enclosure comprising,
an aperture;
a secondary bushing comprising,
a mounting assembly,
a plurality of cable connectors,
wherein the plurality of cable connectors are positioned at a second side;
at least one power cable; and
at least one sleeve;
wherein the at least one power cable and the at least one sleeve are positioned at the second side; and
wherein the at least one sleeve is configured to seal at least one of the plurality of cable connector from a fluid when the second side is submerged by the fluid.
14. The system of claim 13 , wherein a first side of the secondary bushing is coupled to the aperture of the sealed enclosure utilizing the mounting assembly of the secondary bushing.
15. The system of claim 14 , wherein the mounting assembly comprises a flange that is welded around the aperture of the sealed enclosure.
16. The system of claim 13 , wherein the at least one power cable is coupled to at least one cable connector of the secondary bushing.
17. The system of claim 16 , wherein the at least one sleeve is coupled over a portion of the at least one power cable and a portion of the at least one cable connector.
18. The system of claim 17 , wherein the at least one sleeve is coupled using an interference fit.
19. The system of claim 13 , wherein the sealed enclosure is a transformer.
20. The system of claim 19 , wherein the sealed enclosure is filled with a dielectric fluid.