Circuit breaker with arc eliminator and power receiving/distributing equipment using same

Patent metadata

Field	Value
Publication number	US-2017179711-A1
Application number	US-201515300190-A
Country	US
Kind code	A1
Filing date	Apr 24, 2015
Priority date	May 21, 2014
Publication date	Jun 22, 2017
Grant date	—

Abstract

Power receiving/distributing equipment is composed of a switchgear incorporated for each major electric path section, wherein, when arc fault occurs on an electric path to which a circuit breaker is connected, a high-speed closing device closes to detour arc current so as to flow to a ground conductor, thereby eliminating arc at a fault electric path portion. The high-speed closing device is connected to one pole or both poles of a breaking portion of the circuit breaker, and is incorporated into an insulating support member on a corresponding pole electric path so as to be able to be drawn as a whole.

First claim

1 . A circuit breaker with arc eliminator, comprising a high-speed closing device which, when arc fault occurs on an electric path to which the circuit breaker is connected, closes to cause arc current to detour via a body ground contact provided to the circuit breaker and flow to a ground conductor, thereby eliminating arc at a fault electric path portion, and needs to be replaced, wherein
the high-speed closing device is connected to one pole or both poles of a breaking portion of the circuit breaker, and is incorporated into an insulating support member on a corresponding pole electric path, and the circuit breaker is formed in a drawer type as a whole.

2 . The circuit breaker with arc eliminator according to claim 1 , wherein
the high-speed closing device is formed integrally with the insulating support member by casting.

3 . The circuit breaker with arc eliminator according to claim 1 , wherein
the insulating support member is formed as an insulating case-shaped component manufactured by casting or molding, and the high-speed closing device is incorporated into the insulating support member formed as the insulating case-shaped component.

4 . The circuit breaker with arc eliminator according to claim 1 , wherein
the insulating support member is formed as an insulating case-shaped component manufactured by casting or molding, the high-speed closing device is assembled in a detachable manner with the insulating support member formed as the insulating case-shaped component, and in the high-speed closing device, a current-conduction connection portion with an electric path conductor portion of the circuit breaker has an insertion-type configuration, so as to allow the high-speed closing device to be replaced in a state in which the insulating support member formed as the insulating case-shaped component is fixed to the circuit breaker.

5 . Power receiving/distributing equipment composed of a switchgear having a circuit breaker with arc eliminator incorporated therein for each of major electric path sections, the circuit breaker including a high-speed closing device which, when arc fault occurs on an electric path to which the circuit breaker is connected, closes to cause arc current to detour via a body ground contact provided to the circuit breaker and flow to a ground conductor, thereby eliminating arc at a fault electric path portion, and needs to be replaced, wherein
the high-speed closing device is connected to one pole or both poles of a breaking portion of the circuit breaker, and is incorporated into an insulating support member on a corresponding pole electric path, and the circuit breaker is formed in a drawer type as a whole.

6 . The power receiving/distributing equipment according to claim 5 , wherein
the switchgear for a bus portion is composed of a circuit breaker with arc eliminator of both-side type in which the high-speed closing devices are connected to both poles of the breaking portion of the circuit breaker, and another switchgear is composed of a circuit breaker with arc eliminator of one-side type in which the high-speed closing device is connected to one pole of the breaking portion of the circuit breaker.

7 . The power receiving/distributing equipment according to claim 5 , wherein
the switchgear for a bus portion and another switchgear are each composed of a circuit breaker with arc eliminator of both-side type in which the high-speed closing devices are connected to both poles of the breaking portion of the circuit breaker.

Assignees

• Mitsubishi Electric Corp

Inventors

• Numata Shinichi

Classifications

• H02B13/035

  Gas-insulated switchgear · CPC title

• H02B11/28

  Earthing arrangements · CPC title

• H02H7/222 Primary

  for switches · CPC title

• H02B1/36

  with withdrawable units · CPC title

• H02B13/025 Primary

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