Switchgear

Patent metadata

Field	Value
Publication number	US-10164411-B2
Application number	US-201515307244-A
Country	US
Kind code	B2
Filing date	Sep 3, 2015
Priority date	Sep 24, 2014
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A switchgear according to the present invention includes: an air intake mechanism attachment body arranged on an air intake portion provided on a housing; an air intake opening provided in the air intake mechanism attachment body; a check valve type shutter which is arranged on the inner side of the air intake opening on the housing, performs an air intake from the outside of the housing, and blocks the air intake opening in the occurrence of an internal short circuit fault; and a ground fault partition body which is arranged between said check valve type shutter and a conductive portion in said housing and in which the length of at least one side is longer than said check valve type shutter.

First claim

The invention claimed is:

1. A switchgear, comprising:
an air intake mechanism attachment body arranged on an air intake portion provided on a housing;
an air intake opening provided in said air intake mechanism attachment body;
a check valve type shutter arranged on an inner side of said air intake opening on said housing, performs an air intake from the outside of said housing, and blocks said air intake opening in the occurrence of an internal short circuit fault; and
a ground fault partition body having electrical conductivity and configured to make a strayed arc cause a ground fault, the ground fault partition body arranged between said check valve type shutter and a conductive portion in said housing and in which a length of at least one side is longer than said check valve type shutter.

2. The switchgear according to claim 1 ,
wherein said ground fault partition body is made of a metal plate.

3. The switchgear according to claim 1 ,
wherein said ground fault partition body is formed with an opening portion.

4. The switchgear according to claim 2 ,
wherein said ground fault partition body is formed with an opening portion.

5. A switchgear, comprising:
an air intake mechanism attachment body arranged on an air intake portion provided on a housing;
an air intake opening provided in said air intake mechanism attachment body;
a check valve type shutter arranged on an inner side of said air intake opening on said housing, performs an air intake from the outside of said housing, and blocks said air intake opening in the occurrence of an internal short circuit fault; and
a ground fault frame body having electrical conductivity and configured to make a strayed arc cause a ground fault, the ground fault frame body arranged between said check valve type shutter and a conductive portion in said housing and in which a length of at least one side is longer than said check valve type shutter.

6. The switchgear according to claim 5 ,
wherein said ground fault frame body is configured in a streamlined shape that reduces flow velocity resistance against propagation of high temperature and high pressure gas during an internal short circuit fault.

7. The switchgear according to claim 5 ,
wherein said ground fault frame body is arranged in a direction perpendicular to said conductive portion in said housing.

8. The switchgear according to claim 6 ,
wherein said ground fault frame body is arranged in a direction perpendicular to said conductive portion in said housing.

9. The switchgear according to claim 5 ,
wherein said ground fault frame body is arranged so as to be parallel to said conductive portion in said housing.

10. The switchgear according to claim 6 ,
wherein said ground fault frame body is arranged so as to be parallel to said conductive portion in said housing.

Assignees

• Mitsubishi Electric Corp

Inventors

• Kozuru Susumu
• Yamaji Toru
• NAGAYASU Nobukazu
• Sasaki Takahiro

Classifications

• H02B1/14

  Shutters or guards for preventing access to contacts (shielding of isolating-contacts in withdrawable switchgear H02B11/24) · CPC title

• H02B1/16

  Earthing arrangements (earthing arrangements for substations H02B5/01; earthing arrangements for switchgear H02B11/28, H02B13/075) · CPC title

• H02B1/56 Primary

  Cooling; Ventilation · CPC title

• H02B13/025

  Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect · CPC title

• H02B11/24

  Shutters or guards · CPC title