Fixed contact for joining a bus bar and a sliding contact of an electrical switchgear

Patent metadata

Field	Value
Publication number	US-9865405-B2
Application number	US-201514613003-A
Country	US
Kind code	B2
Filing date	Feb 3, 2015
Priority date	Feb 3, 2015
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

A fixed contact for joining a bus bar and a sliding contact of an electrical switchgear is provided. The fixed contact includes a plurality of circumferential segments operatively coupled to each other. The fixed contact also includes an axial extent extending along a longitudinal axis of the fixed contact from a first end of the fixed contact to a second end of the fixed contact, the axial extent comprising a mounting region, a central region and a sliding contact engagement region. The mounting region extends axially from the first end of the fixed contact to the central region, the mounting region configured to be operatively coupled to the bus bar. The sliding contact engagement region extends axially from the central region to the second end of the fixed contact, the sliding contact region configured to be slidably engaged with a sliding contact.

First claim

What is claimed is:

1. A fixed contact for joining a bus bar and a sliding contact of an electrical switchgear comprising:
a plurality of circumferential segments operatively coupled to each other with at least one non-magnetic mechanical fastener;
the fixed contact having an axial extent extending along a longitudinal axis of the fixed contact from a first end of the fixed contact to a second end of the fixed contact, the axial extent comprising a mounting region, a central region and a sliding contact engagement region;
the mounting region extending axially from the tint end of the fixed contact to the central region, the mounting region configured to be operatively coupled to the bus bar; and
the sliding contact engagement region extending axially from the central region to the second end of the fixed contact, the slide z contact re ion configured to be slidably engaged with a sliding contact.

2. The fixed contact of claim 1 , further comprising a channel defined by the plurality of circumferential segments.

3. The fixed contact of claim 2 , the channel extending along a portion of the sliding contact engagement region.

4. The fixed contact of claim 2 , the channel extending along an entire length of the sliding contact region.

5. The fixed contact of claim 2 , further comprising at least one exhaust aperture fluidly coupling the channel to an external region of the fixed contact.

6. A fixed contact for joining a bus bar and a sliding contact of an electrical switchgear, comprising:
a plurality of circumferential segments, comprising a first segment and a second segment operatively coupled to each other;
the fixed contact having an axial extent extending along a longitudinal axis of the fixed contact from a first end of the fixed contact to a second end of the fixed contact, the axial extent comprising a mounting region, a central region and a sliding contact engagement region;
the mounting region extending axially from the first end of the fixed contact to the central region, the mounting region configured to be operatively coupled to the bus bar; and
the sliding contact engagement region extending axially from the central region to the second end of the fixed contact, the sliding contact region configured to be slidably engaged with a sliding contact,
further comprising a plurality of slots formed in the first segment and the second segment, each of the plurality of slots of the first segment aligned with a corresponding slot of the second segment to define a plurality of apertures when the first segment and the second segment are operatively coupled.

7. The fixed contact of claim 6 , wherein the first segment and the second segment each form half of the fixed contact.

8. An electrical switchgear comprising:
a housing;
a shutter disposed within the housing and separating the electrical switchgear into a bus bar portion and a circuit breaker portion;
an electrical conductor located within the bus bar portion;
a sliding contact located within the circuit breaker portion; and
a fixed contact comprising a plurality of circumferential segments operatively coupled to each other with at least one non-magnetic mechanical fastener, electrically connecting the electrical conductor and the sliding contact, the fixed contact extending through the shutter, the fixed contact having an axial extent extending from a first end of the fixed contact to a second end of the fixed contact, the axial extent comprising a mounting region, a central region and a sliding contact engagement region;
the mounting region extending axially from the first end of the fixed contact to the central region, the mounting region configured to be operatively coupled to the bus bar electrical conductor;
the sliding contact engagement region extending axially from the central region to the second end of the fixed contact, the sliding contact region configured to be slidably engaged with the sliding contact; and
a channel extending along the sliding contact engagement region and defined by the fixed contact.

9. The electrical switchgear of claim 8 , wherein the channel is defined by the plurality of circumferential segments.

10. The electrical switchgear of claim 8 , wherein the first segment and the second segment each form half of the fixed contact.

11. The electrical switchgear of claim 8 , the channel extending along a portion of the sliding contact engagement region.

12. The electrical switchgear of claim 8 , the channel extending along an entire length of the sliding contact region.

13. The electrical switchgear of claim 8 , further comprising at least one exhaust aperture fluidly coupling the channel to an external region of the fixed contact.

14. The electrical switchgear of claim 8 , wherein the electrical conductor comprises a bus bar.

15. The electrical switchgear of claim 8 , wherein the electrical conductor comprises at least one cable.

16. An electrical switchgear, comprising:
a housing;
a shutter disposed within the housing and separating the electrical switchgear into a bus bar portion and a circuit breaker portion;
an electrical conductor located within the bus bar portion;
a sliding contact located within the circuit breaker portion; and
a fixed contact comprising a first segment and a second segment;
electrically connecting the electrical conductor and the sliding contact, the fixed contact extending through the shutter and comprising:
the fixed contact having an axial extent extending from a first end of the fixed contact to a second end of the fixed contact, the axial extent comprising a mounting region, a central region and a sliding contact engagement region;
the mounting region extending axially from the first end of the fixed contact to the central region, the mounting region configured to be operatively coupled to the bus bar electrical conductor;
the sliding contact engagement region extending axially from the central region to the second end of the fixed contact, the sliding contact region configured to be slidably engaged with the sliding contact; and
a channel defined by the first and second segments extending along the sliding contact engagement region; and
a plurality of slots formed in the first segment and the second segment, each of the plurality of slots of the first segment aligned with a corresponding slot of the second segment to define a plurality of apertures when the first segment and the second segment are operatively coupled.

Assignees

• Gen Electric

Inventors

• Rajauria Samir
• Jakkireddy Ayyappa Reddy
• Kurra Guru Moorthy
• Pokkula Lenin

Classifications

• H01H1/62 Primary

  Heating or cooling of contacts · CPC title

• H01H2033/6613

  Cooling arrangements directly associated with the terminal arrangements · CPC title

• H01H33/025

  Terminal arrangements (for vacuum switches H01H33/6606) · CPC title

• H01H9/02

  Bases, casings, or covers (accommodating more than one switch or a switch and another electrical component H02B1/26) · CPC title

• H01H1/36 Primary

  by sliding · CPC title