Circuit breaker

Patent metadata

Field	Value
Publication number	US-9305724-B2
Application number	US-201114343295-A
Country	US
Kind code	B2
Filing date	Sep 20, 2011
Priority date	Sep 20, 2011
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A circuit breaker includes: a first arc-extinguishing chamber and a second arc-extinguishing chamber that interrupt a current by opening contact points and extinguish an arc during the current is being interrupted; and a connection unit that connects the first arc-extinguishing chamber and the second arc-extinguishing chamber to each other. The first arc-extinguishing chamber and the second arc-extinguishing chamber are connected to the connection unit in such a manner that shaft lines of the arc-extinguishing chambers form an angle of substantially 90 degrees. The first arc-extinguishing chamber is arranged on a side of the connection unit in such a manner that the shaft line thereof is substantially horizontal, and the second arc-extinguishing chamber is arranged on an upper side of the connection unit in such a manner that the shaft line thereof is substantially vertical.

First claim

The invention claimed is:

1. A circuit breaker comprising:
a first arc-extinguishing part including at least one arc-extinguishing chamber and a second arc-extinguishing part including at least one arc-extinguishing chamber, all of the arc-extinguishing chambers being connected serially and each of the arc-extinguishing chambers interrupting a current by simultaneously opening contact points within each of the arc-extinguishing chambers to extinguish an arc while the current is being interrupted in each arc-extinguishing chamber;
a connection unit that connects the first arc-extinguishing part and the second arc-extinguishing part to each other, and
a hermetic tank in which the first arc-extinguishing part, the second arc-extinguishing part, and the connection unit are accommodated, wherein
the first arc-extinguishing part and the second arc-extinguishing part are connected to the connection unit in such a manner that shaft lines of the first arc-extinguishing part and the second arc-extinguishing part form an angle of substantially 90 degrees, wherein
the first arc-extinguishing part is arranged on a side of the connection unit in such a manner that the shaft line thereof is substantially horizontal, and
the second arc-extinguishing part is arranged on an upper side of the connection unit in such a manner that the shaft line thereof is substantially vertical.

2. The circuit breaker according to claim 1 , further comprising an operation device that performs an operation of interrupting a current flowing in the arc-extinguishing chambers of each of the first and second arc-extinguishing parts, wherein
the operation device is connected to a lower side of the connection unit.

3. The circuit breaker according to claim 1 , further comprising an operation device that performs an operation of interrupting a current flowing in the arc-extinguishing chambers of each of the first and second arc-extinguishing parts, wherein
the operation device is provided on an opposite side of the first arc-extinguishing part sandwiching the connection unit and is connected to the connection unit.

4. The circuit breaker according to claim 1 , further comprising an operation device that performs an operation of interrupting a current flowing in the arc-extinguishing chambers of each of the first and second arc-extinguishing parts, wherein
the operation device is provided in a direction substantially perpendicular to the shaft line of the first arc-extinguishing part and the shaft line of the second arc-extinguishing part with respect to the connection unit and is connected to the connection unit.

5. The circuit breaker according to claim 1 , wherein shaft centers of the first arc-extinguishing part, the second arc-extinguishing part, and a conductor connected to the first arc-extinguishing part and the second arc-extinguishing part substantially coincide with a shaft center of the hermetic tank.

Assignees

• Tanigaki Shuichi
• Yoshida Daisuke
• Mori Tomohito
• Mitsubishi Electric Corp

Inventors

• Tanigaki Shuichi
• Yoshida Daisuke
• Mori Tomohito

Classifications

• H01H33/70

  Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid · CPC title

• H02B13/035 Primary

  Gas-insulated switchgear · CPC title

• H01H33/08 Primary

  Stationary parts for restricting or subdividing the arc, e.g. barrier plate · CPC title