Nose shield for a gas actuated high voltage bushing

• US 4,082,404 A
• Filed: 11/03/1976
• Issued: 04/04/1978
• Est. Priority Date: 11/03/1976
• Status: Expired due to Term

• Current Assignee: Cooper Power Systems Incorporated (Eaton Corporation PLC.)
• Original Assignee: RTE Corp. (Eaton Corporation PLC.)
• Inventors: Flatt, Richard P.
• Primary Examiner(s): Lake, Roy
• Assistant Examiner(s): Jones, DeWalden W.
• Application Number:
  US05/738,741
• Time in Patent Office: 517 Days
• Field of Search: 339/111, 339/161, 339/117 R, 339/117 P, 339/143 R
• US Class Current: 439/89
• CPC Class Codes: H01R 13/53 Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing

Abstract

In a high voltage bushing having a hollow tubular bore contact engageable with the probe of a high voltage cable terminator, a nose shield for reducing corona around the probe on close-in of the terminator with the bushing, the nose shield being formed of a conductive cylinder which is embedded within the bushing housing but is electrically isolated from the conductive cylinder in the bushing and is electrically connected to the conductive insert of the terminator on close-in.

Claims

1. A high voltage bushing for terminating a high voltage cable having a cable terminator connected thereto, the terminator including a probe and a conductive insert, the bushing comprising a housing having an elongated bore and a bore contact movable in the bore in the housing and a nose shield comprising an electrically conductive member embedded within and surrounding the open end of the bore in the bushing, said member being partially exposed at one end for engagement with the conductive insert of the terminator on close-in of the probe with the bore contact in the bushing.

2. A high voltage bushing comprising:

a housing,

a cavity within the housing and a contact-snuffer assembly mounted for axial movement within the housing in response to an increase in gas pressure within the cavity in the housing,

electrically conductive means embedded within and partially extending outwardly from the bushing, the exposed portion of the conductive means being positioned to engage the electrically conductive insert of a high voltage cable terminator on close-in whereby the electrical potential difference between the terminator and the shield is eliminated.

3. The bushing according to claim 2 wherein said conductive means comprises an electrically conductive member surrounding the open end of the bushing.

4. A high voltage cable terminator including a plug having a recess, a probe mounted in said recess and an electrically conductive insert connected to the probe, and a bushing including a housing having a gas-actuated contact-snuffer assembly mounted therein, the improvement comprising:

a conductive shield mounted in the bushing to surround the probe on close-in and being partially exposed to electrically engage the electrically conductive insert on the terminator on close-in.

5. Electrical connector apparatus comprising:

a bushing having a bore contact mounted for reciprocal movement, and

a connector having a conductive probe moveable independently into engagement and disengagement with the bore contact, said connector including a conductive insert surrounding the probe and being spaced from the end thereof, and

an electrically conductive shield partially embedded in said bushing to encircle said probe on engagement with said bore contact, said shield being electrically connected to said conductive insert on engagement of said probe with said bore contact whereby the electrical potential of said shield and probe will be the same.

6. An electrical connector system comprising:

a bushing including an insulated support member, and

a bore contact mounted in said member, and

a terminator movable independently of said bushing and including a probe for engaging and disengaging said bore contact,

said bushing including an electrically conductive shield positioned to surround said probe on engagement with said bore contact, and

means for electrically connecting said shield to said probe on engagement of said probe with said bore contact whereby the electrical potential of said shield and probe are the same.

7. The system according to claim 6 wherein said shield is partially embedded in support member.

8. The system according to claim 6 wherein said connecting means comprises an electrically conductive gasket mounted in the end of the bushing and being electrically connected to said shield.