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

Patent metadata

Field	Value
Publication number	US-10381824-B2
Application number	US-201515300190-A
Country	US
Kind code	B2
Filing date	Apr 24, 2015
Priority date	May 21, 2014
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

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

The invention claimed is:

1. A circuit breaker with arc eliminator, comprising
a closing device which, when an 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, wherein
the 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,
the closing device being assembled in a detachable manner from the insulating support member with the insulating support member formed as an insulating case-shaped component by casting or molding, the closing device configured to be replaceable after use, 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 closing device is formed integrally with the insulating support member by casting.

3. The circuit breaker with arc eliminator according to claim 1 , wherein
in the 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 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.

4. Power receiving/distributing equipment, comprising:
a switchgear having a circuit breaker with arc eliminator incorporated therein for each of major electric path sections, the circuit breaker including a closing device which, when an 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, wherein
the 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,
the closing device being assembled in a detachable manner from the insulating support member with the insulating support member formed as an insulating case-shaped component by casting or molding, the closing device configured to be replaceable after use, and
the circuit breaker is formed in a drawer type as a whole.

5. The power receiving/distributing equipment according to claim 4 , wherein
the switchgear is for a bus portion and is composed of a circuit breaker with arc eliminator of both-side type in which 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 closing device of the other switchgear is connected to one pole of the breaking portion of the circuit breaker of the other switchgear.

6. The power receiving/distributing equipment according to claim 4 , wherein
the switchgear is for a bus portion, and another switchgear is composed of a circuit breaker with arc eliminator of both-side type in which closing devices are connected to both poles of the breaking portion of the circuit breaker of the other switchgear.

Assignees

• Mitsubishi Electric Corp

Inventors

• Numata Shinichi

Classifications

• H02B11/28

  Earthing arrangements · CPC title

• H02B13/025 Primary

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

• H02B11/167

  truck type (H02B11/127 takes precedence) · CPC title

• H01H79/00

  Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected {(H01H39/004 takes precedence)} · CPC title

• H02H7/222 Primary

  for switches · CPC title