Loadbreak assembly

Patent metadata

Field	Value
Publication number	US-12562525-B2
Application number	US-202418673803-A
Country	US
Kind code	B2
Filing date	May 24, 2024
Priority date	Dec 21, 2020
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

A loadbreak bushing including a housing with a bore extending along the longitudinal axis from a first end of the housing toward a second end of the housing. The bore has a first end positioned at or adjacent the first end of the housing and a second end opposite the first end of the bore. A first electrical contact is positioned within the bore adjacent the second end and is configured to be in electrical communication with an electrical component. The first electrical contact is configured to be physically and electrically coupled to a second electrical contact of a power connection. An arc quenching member is positioned within the bore between the first end of the bore and the first electrical contact. A resistive member is coupled to either the first electrical contact or the arc quenching member.

First claim

What is claimed is:

1 . A loadbreak bushing comprising:
a housing including
a first end,
a second end opposite the first end,
a longitudinal axis extending between the first end of the housing and the second end of the housing, and
a bore extending along the longitudinal axis from the first end of the housing toward the second end of the housing, the bore having a first end positioned at or adjacent the first end of the housing and a second end opposite the first end of the bore;
a first electrical contact positioned within the bore adjacent the second end and configured to be in electrical communication with an electrical component, the first electrical contact configured to be physically and electrically coupled to a second electrical contact of a power connection; an arc quenching member positioned within the bore between the first end of the bore and the first electrical contact, the arc quenching member including a hollow body; and a resistive member coupled to either the first electrical contact or the arc quenching member.

2 . The loadbreak bushing of claim 1 , wherein the resistive member is formed from one or more of tungsten, molybdenum, silicon carbide, metal oxide varistor, a ceramic, a conductive elastomer, high dielectric constant polymer, or an alloy.

3 . The loadbreak bushing of claim 1 , wherein the resistive member is embedded in the arc quenching member.

4 . The loadbreak bushing of claim 1 , wherein the resistive member is a plurality of resistive member particles dispersed within a material that forms arc quenching member.

5 . The loadbreak bushing of claim 1 , wherein the hollow body of the arc quenching member has a first end positioned adjacent the first end of the housing and a second end opposite the first end of the hollow body and positioned adjacent the first electrical contact, the resistive member being embedded in the second end of hollow body.

6 . The loadbreak bushing of claim 5 , wherein the resistive member includes one or more resistive members that extend from the second end of the hollow body of the arc quenching member towards the first end of the hollow body of the arc quenching member.

7 . The loadbreak bushing of claim 5 , wherein a shape of the resistive member is substantially the same as a shape of the second end of the hollow body.

8 . The loadbreak bushing of claim 5 , wherein the resistive member defines a hollow body that is concentric with the second end of the hollow body of the arc quenching member.

9 . The loadbreak bushing of claim 1 , wherein the first electrical contact includes a first end positioned adjacent the arc quenching member and a second end opposite the first end of the first electrical contact, the resistive member coupled to the first end of the first electrical contact, the second end of the first electrical contact configured to be in electrical communication with the electrical component.

10 . A loadbreak bushing comprising:
a housing including
a first end,
a second end opposite the first end,
a longitudinal axis extending between the first end of the housing and the second end of the housing, and
a bore extending along the longitudinal axis from the first end of the housing toward the second end of the housing, the bore having a first end positioned at or adjacent the first end of the housing and a second end opposite the first end of the bore;
a first electrical contact positioned within the bore and including a base positioned adjacent the second end and a plurality of fingers extending from the base towards the first end, the base configured to be in electrical communication with an electrical component, the plurality of fingers configured to receive and electrically couple to a second electrical contact of a power connection; an arc quenching member positioned within the bore between the first end of the bore and the plurality of fingers of the first electrical contact, the arc quenching member including a hollow body; and a resistive member coupled to either the first electrical contact or the arc quenching member.

11 . The loadbreak bushing of claim 10 , wherein the resistive member is formed from one or more of tungsten, molybdenum, silicon carbide, metal oxide varistor, a ceramic, a conductive elastomer, high dielectric constant polymer, or an alloy.

12 . The loadbreak bushing of claim 10 , wherein the resistive member is embedded in the arc quenching member.

13 . The loadbreak bushing of claim 10 , wherein the resistive member is a plurality of resistive member particles dispersed within a material that forms the arc quenching member.

14 . The loadbreak bushing of claim 10 , wherein the hollow body of the arc quenching member has a first end positioned adjacent the first end of the housing and a second end opposite the first end of the hollow body and positioned adjacent the plurality of fingers of the first electrical contact, the resistive member being embedded in the second end of hollow body.

15 . The loadbreak bushing of claim 14 , wherein the resistive member includes one or more resistive members that extends from the second end of the hollow body of the arc quenching member towards the first end of the hollow body of the arc quenching member.

16 . The loadbreak bushing of claim 14 , wherein a shape of the resistive member is substantially the same as a shape of the second end of the hollow body.

17 . The loadbreak bushing of claim 10 , wherein the resistive member is coupled to one or more of the plurality of fingers.

18 . The loadbreak bushing of claim 10 , wherein the resistive member covers an end of one or more of the plurality of fingers.

19 . The loadbreak bushing of claim 10 , wherein the resistive member is coupled to and extends from one or more of the plurality of fingers towards the arc quenching member.

20 . A loadbreak bushing comprising:
a housing including
a first end,
a second end opposite the first end,
a longitudinal axis extending between the first end of the housing and the second end of the housing, and
a bore extending along the longitudinal axis from the first end of the housing toward the second end of the housing, the bore having a first end positioned at or adjacent the first end of the housing and a second end opposite the first end of the bore;
a first electrical contact positioned within the bore adjacent the second end and configured to be in electrical communication with an electrical component, the first electrical contact configured to be physically and electrically coupled to a second electrical contact of a power connection to complete an electrical circuit; an arc quenching member positioned within the bore between the first end of the bore and the first electrical contact, the arc quenching member including a hollow body; and a resistive member coupled to either the first electrical contact or the arc quenching member, wherein the resistive member is excluded from circuit while the second electrical contact is physically and electrically coupled to the first electrical contact, and wherein the resistive member bridges the second electrical contact and the first electrical contact when the second electrical contact is physically and electrically decoupled from the first electrical contact thereby adding resistance to the circuit and lowering the current.

Assignees

• Hubbell Inc

Inventors

• Hughes David Charles
• Van Besouw Bastiaan Hubertus

Classifications

• H01R31/00

  Coupling parts supported only by co-operation with counterpart · CPC title

• H01C7/12

  Overvoltage protection resistors; Arresters · CPC title

• H01H33/16

  Impedances connected with contacts · CPC title

• H01H33/12

  Auxiliary contacts on to which the arc is transferred from the main contacts (using arcing horns H01H33/20) · CPC title

• H01R13/6616

  with resistor · CPC title