Electrical connector having a sacrificial cap and integrated test point

Patent metadata

Field	Value
Publication number	US-10845392-B2
Application number	US-201815971820-A
Country	US
Kind code	B2
Filing date	May 4, 2018
Priority date	Nov 9, 2015
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

A medium or high voltage electrical device includes a housing, a central conductor provided within the housing, and a sacrificial cap configured for mounting on the housing. The sacrificial cap includes an outer housing, an insulated body, and a sacrificial conductor provided within the insulated body, wherein the sacrificial conductor electrically communicates with the central conductor within the housing when the sacrificial cap is mounted on the housing. A voltage test point terminal is provided within the insulated body and accessible via the outer housing of the sacrificial cap to capacitively couple with the sacrificial conductor. The sacrificial cap includes a portion configured to be physically severed to confirm that the electrical connector is de-energized.

First claim

The invention claimed is:

1. A medium or high voltage electrical device comprising:
a housing;
a central conductor provided within the housing; and
a sacrificial cap configured for mounting on the housing, wherein the sacrificial cap comprises:
an outer housing;
an insulated body; and
a sacrificial conductor provided within the insulated body, wherein the sacrificial conductor electrically communicates with the central conductor within the housing when the sacrificial cap is mounted on the housing; and

a voltage test point terminal provided within the insulated body and extends through an opening in, and accessible via, the outer housing of the sacrificial cap, the voltage test point terminal being capacitively coupled with the sacrificial conductor, the voltage test point terminal being separated from the sacrificial conductor by a portion of the insulated body,
wherein the sacrificial cap includes a portion configured to be physically severed to confirm that the electrical device is de-energized.

2. The electrical device of claim 1 , wherein at least a portion of the outer housing of the sacrificial cap includes a semi-conductive outer shield.

3. The electrical device of claim 2 , wherein the at least a portion of the sacrificial cap comprises a ethylene-propylene-dienemonomer (EPDM) shield.

4. The electrical device of claim 1 , further comprising a test point cap configured to be removably engaged with the outer housing of the sacrificial cap, the test point cap configured to engage with the outer housing at a position at which the test point cap extends over the opening in the outer housing.

5. The electrical device of claim 4 , wherein the test point cap comprises a semi-conductive material,
wherein the test point terminal includes a first enlarged portion adjacent to the portion of the insulated body separating the voltage test point terminal from the sacrificial conductor, the first enlarged portion having a size that is larger than an adjacent portion of the voltage test point terminal, and
wherein the sacrificial conductor includes a second enlarged portion adjacent to the portion of the insulated body separating the voltage test point terminal from the sacrificial conductor, the second enlarged portion having a size that is larger than an adjacent portion of the sacrificial conductor.

6. The electrical device of claim 1 , wherein the voltage test point terminal is spaced from the sacrificial conductor within the insulated body of the sacrificial cap.

7. The electrical device of claim 1 , wherein the sacrificial cap comprises a cut-through portion that includes at least a portion of the sacrificial conductor.

8. The electrical device of claim 7 , wherein the outer housing of the sacrificial cap comprises graphical indicia indicating a location of the cut-through portion.

9. The electrical device of claim 1 , wherein the housing includes a direct access port therethough for accessing the central conductor, and wherein the sacrificial cap is mounted to the direct access port.

10. The electrical device of claim 9 , wherein the sacrificial conductor further comprises a sacrificial probe conductor projecting from the insulated body,
wherein the sacrificial probe conductor contacts the central conductor via the direct access port when the sacrificial cap is mounted to the direct access port.

11. The electrical device of claim 9 , wherein the insulated body of the sacrificial cap includes an engagement portion for engaging the direct access port in the housing,
wherein the engagement portion comprises a cylindrical or frustoconical cavity for receiving a projection portion of the direct access port,
wherein the sacrificial probe conductor extends through the engagement portion.

12. The electrical device of claim 11 , wherein the engagement portion comprises at least one resilient ring for engaging a corresponding groove in the projection portion of the direct access port.

13. The electrical device of claim 12 , wherein the housing further comprises:
a cable receiving end having a first bore extending therethrough for receiving a power cable having the central conductor;
a first T-end projecting perpendicular to the cable receiving end and including a second bore extending therethrough that communicates with the first bore in the cable receiving end;
a second T-end projecting perpendicular to the cable receiving end and including a third bore extending therethrough that communicates with the first bore in the cable receiving end and the second bore in the first T-end; and
an adapter component configured for insertion into the second bore in the second T-end,
wherein the adapter component includes an insulated outer body and a conductive core configured to conductively communicate with the central conductor of the power cable, and
wherein the sacrificial conductor of the sacrificial cap electrically communicates with the conductive core of the adapter component when the sacrificial cap is mounted on the adapter component.

14. The electrical device of claim 13 , wherein the second bore in the second T-end comprises a substantially conical configuration, and wherein at least a portion of the adapter component includes a conical outer surface for mating with the second bore.

15. A medium or high voltage electrical device comprising:
a housing having an adapter component configured for insertion into a bore in a T-end of the housing, the adapter component includes an insulated outer body and a conductive core configured to conductively communicate with a central conductor of a power cable,
a central conductor provided within the housing; and
a sacrificial cap configured for mounting on the housing, wherein the sacrificial cap comprises:
an outer housing;
an insulated body; and
a sacrificial conductor provided within the insulated body, wherein the sacrificial conductor electrically communicates with the central conductor within the housing when the sacrificial cap is mounted on the housing; and

a voltage test point terminal provided within the insulated body and accessible via, the outer housing of the sacrificial cap to capacitively couple with the sacrificial conductor,
wherein the sacrificial conductor of the sacrificial cap electrically communicates with the conductive core of the adapter component when the sacrificial cap is mounted on the adapter component,
wherein the sacrificial cap includes a portion configured to be physically severed to confirm that the electrical device is de-energized, and
wherein the adapter component includes a cap engaging portion for engaging the sacrificial cap.

16. The electrical device of claim 15 , wherein the conductive core of the adapter component extends through the cap engaging portion,
wherein the conductive core in the cap engaging portion includes a first cavity therein,
wherein the sacrificial cap comprises a second cavity for receiving the cap engaging portion of the adapter component,
wherein a portion of the sacrificial conductor in the sacrificial cap projects within the second cavity, and
wherein the portion of the sacrificial conductor is received within the first cavity the conductive core in the cap engaging portion during placement of the sacrificial cap on the cap engaging portion of the adapter component.

17. A method, comprising:
providing an electrical device with a housing and a central conductor provided within the housing;
installing a sacrificial cap onto the electrical device so that a sacrificial conductor of the sacrificial cap electrically communicates with the centra

Assignees

• Abb Schweiz Ag

Inventors

• Siebens Larry N

Classifications

• H01R4/22

  End caps, i.e. of insulating or conductive material for covering or maintaining connections between wires entering the cap from the same end · CPC title

• H01R13/53

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

• G01R15/16 Primary

  using capacitive devices · CPC title

• H02G15/103

  with devices for relieving electrical stress · CPC title

• H02G15/16

  structurally associated with support for line-connecting terminals within the box · CPC title