Angle loadbreak bushing

Patent metadata

Field	Value
Publication number	US-10749294-B2
Application number	US-201816155535-A
Country	US
Kind code	B2
Filing date	Oct 9, 2018
Priority date	Oct 9, 2018
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

A loadbreak bushing that includes a loadbreak trunk and at least one loadbreak leg. Opposing ends of the loadbreak trunk can include a first connection interface and a second connection interface, respectively, the first connection interface being configured to be matingly received in a bushing well. Each loadbreak leg, which can include a contact assembly having at least a female contact, can extend along a central leg axis from the loadbreak trunk to a third, or leg, connection interface, the central leg axis being slanted or diagonal relative to a central trunk axis of the loadbreak trunk. The third connection interface can be configured to be coupled to an elbow connector that is coupled to a power cable, among other electrical connectors, while the second connection interface can be configured to be coupled to a grounding elbow connector, among other electrical connectors and accessories.

First claim

The invention claimed is:

1. A loadbreak bushing configured to be electrically coupled to a bushing well, the loadbreak bushing comprising:
a loadbreak trunk that extends along a central trunk axis from a first connection interface to a second connection interface of the loadbreak bushing, at least a portion of the first connection interface structured to be matingly received within the bushing well, the second connection interface outwardly extending to an opening at an end of the second connection interface that is positioned outside of an electrically conductive outer bushing jacket of the loadbreak bushing;
a loadbreak leg extending along a central leg axis from the loadbreak trunk to a third connection interface of the loadbreak bushing, the central leg axis being non-parallel and non-perpendicular to the central trunk axis;
an inner sleeve that extends into both the loadbreak trunk and the loadbreak leg, the inner sleeve having a first passageway that extends along the central trunk axis between an opening in the first connection interface and the opening in the second connection interface, the inner sleeve further comprising a second passageway that extends along the central leg axis in least a portion of the loadbreak leg, the second passageway being in fluid communication with an opening in the third connection interface; and
a contact assembly housed within the second passageway of the inner sleeve, the contact assembly including a female contact;
wherein the central leg axis is angle relative to the central trunk axis.

2. The loadbreak bushing of claim 1 , wherein each of the first, second, and third connection interfaces are male connection interfaces.

3. The loadbreak bushing of claim 1 , wherein the loadbreak trunk and the loadbreak leg include an outer bushing jacket and an insulating jacket, at least a portion of the insulating jacket being housed within the outer bushing jacket, and further wherein the first, second, and third connection interfaces comprise at least a portion of the insulating jacket.

4. The loadbreak bushing of claim 3 , wherein the inner sleeve is housed within the insulating jacket.

5. The loadbreak bushing of claim 4 , wherein the first passageway of the inner sleeve is not in fluid communication with the second passageway of the inner sleeve.

6. The loadbreak bushing of claim 1 , wherein the central leg axis is about 45 degrees from the central trunk axis.

7. The loadbreak bushing of claim 1 , wherein the first passageway includes a first portion and a second portion, the first portion extending to around the opening in the first connection interface and has a first diameter, the second portion extending to around the opening in the second connection interface and has a second diameter, the second diameter being larger than the first diameter such that a shoulder is formed at an intersection of the first and second portions of the first passageway.

8. A loadbreak bushing configured to be coupled to a bushing well, the loadbreak bushing comprising:
an outer bushing jacket having a central jacket trunk and at least one jacket leg, the central jacket trunk extending between a first end and a second end of the central jacket trunk along a central trunk axis, each of the at least one jacket leg extending from the central jacket trunk along a central leg axis that is both non-parallel and non-perpendicular to the central trunk axis;
an insulating jacket, a portion of the insulating jacket extending along the central trunk axis between at least a first connection interface and a second connection interface of the insulating jacket, the first connection interface positioned outside of the first end of the central jacket trunk and configured to be matingly received within the bushing well, the second connection interface positioned outside of the second end of the central jacket trunk, and wherein, for each of the at least one jacket leg, the insulating jacket further includes an insulating leg that extends along the central leg axis and through an end of the at least one jacket leg, the portion of the insulating leg that extends through the end of the at least one jacket leg comprising at least another connection interface;
an inner sleeve housed within the insulating jacket, the inner sleeve being electrically conductive and including a first passageway that extends along the central trunk axis from the first connection interface to the second connection interfaces, the inner sleeve further including a second passageway in the insulating leg of each of the at least one jacket leg; and
a contact assembly housed in the second passageway, the contact assembly including a female contact;
wherein the central leg axis is angle relative to the central trunk axis.

9. The loadbreak bushing of claim 8 , wherein the central leg axis is about 45 degrees from the central trunk axis.

10. The loadbreak bushing of claim 8 , wherein the at least one jacket leg comprises a first jacket leg and a second jacket leg, the first jacket leg and the second jacket leg being radially positioned about the central jacket trunk such that the central leg axis of the first jacket leg is separated from the central leg axis of the second jacket leg by around 90 degrees to around 270 degrees.

11. The loadbreak bushing of claim 10 , wherein the first jacket leg extends from the central jacket trunk at a linear height between the first end and the second end of the central jacket trunk that is different than the linear height at which the second jacket leg extends from the central jacket trunk.

12. The loadbreak bushing of claim 8 , wherein the at least one jacket leg comprises at least a first jacket leg, a second jacket leg, and a third jacket leg.

13. The loadbreak bushing of claim 12 , wherein the second jacket let is positioned between the first jacket leg and the third jacket leg, the first jacket leg being radially separated from the second jacket leg by an angle that is different than an angle of radial separation between the second jacket leg and the third jacket leg.

14. The loadbreak bushing of claim 8 , wherein the first passageway includes a first portion and a second portion, the first portion extending to around an opening in the first connection interface and has a first diameter, the second portion extending to around an opening in the second connection interface and has a second diameter, the second diameter being larger than the first diameter such that a shoulder is formed at an intersection of the first and second portions of the first passageway.

15. The loadbreak bushing of claim 14 , wherein the first portion of the first passageway is shaped and sized to receive a bushing bolt that secures the loadbreak bushing to at least a well stud of the bushing well, and wherein the shoulder is positioned to be in abutting engagement with the bushing bolt when the bushing bolt is secured to the well stud.

16. A loadbreak bushing configured to be electrically coupled to a bushing well, the loadbreak bushing comprising:
a loadbreak trunk that extends along a central trunk axis from a first connection interface to a second connection interface of the loadbreak bushing, at least a portion of the first connection interface structured to be matingly received within the bushing well;
a plurality of loadbreak legs, each of the plurality of loadbreak legs extending along a central leg axis from the loadbreak trunk to a leg connection interface at an end of the loadbreak leg, the central leg axis for each of the plurality of loadbreak legs being non-parallel and non-perpendicular to both the central trunk

Assignees

• Abb Schweiz Ag

Inventors

• Fong Robert

Classifications

• H01H33/53

  Cases (for switchgear H02B1/26); Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices · CPC title

• H01R13/53 Primary

  Bases or cases for heavy duty; Bases or cases {for high voltage} with means for preventing corona or arcing · CPC title