Circuit breaker

Patent metadata

Field	Value
Publication number	US-9287073-B2
Application number	US-201313945790-A
Country	US
Kind code	B2
Filing date	Jul 18, 2013
Priority date	Jul 23, 2012
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

Disclosed is a circuit breaker. The circuit breaker includes an arc exhaust port for exhausting an arc generated in the inner box; an outer box receiving the inner box and including an arc passage for exhausting the arc from the exhaust port to an outside; and an arc guide part for guiding the arc from the arc exhaust port into the arc passage, wherein the arc guide part includes: an upper guide; a lower guide spaced apart from the upper guide; and a connecting part connecting the upper and lower guides to each other in a longitudinal direction.

First claim

What is claimed is:

1. A circuit breaker comprising:
an inner box including an arc exhaust port for exhausting an arc generated in the inner box;
an outer box receiving the inner box and including an arc passage for exhausting the arc from the exhaust port to an exterior; and
an arc guide part for guiding the arc from the arc exhaust port into the arc passage;
wherein the arc guide part comprises:
an upper guide;
a lower guide spaced apart from the upper guide;
a connecting part connecting the upper and lower guides to each other in a longitudinal direction;
a first guide protrusion and a second guide protrusion formed on the lower guide;
a guide groove formed on the upper guide; and
at least one partition part formed on the lower guide, wherein a first partition part of the at least one partition part is disposed between the first and second guide protrusions and protrudes from the lower guide at a predetermined height such that the arc exhausted from the arc exhaust port is partitioned.

2. The circuit breaker of claim 1 , wherein at least the upper guide or the lower guide comprises an inclined surface.

3. The circuit breaker of claim 2 , wherein the lower guide comprises a lower inclined surface, and
the lower inclined surface is gradually inclined upward from the arc exhaust port to the arc passage.

4. The circuit breaker of claim 3 , wherein the upper guide comprises an upper inclined surface, and
the upper inclined surface is gradually inclined downward from the arc exhaust port to the arc passage.

5. The circuit breaker of claim 4 , wherein a distance between the upper and lower inclined surfaces is decreased at a predetermined ratio from the arc exhaust port to the arc passage.

6. The circuit breaker of claim 4 , wherein the arc exhaust port is disposed at one side of the connecting part and the arc passage is disposed at an opposite side of the connecting part.

7. The circuit breaker of claim 6 , wherein a width of the connecting part is reduced at a predetermined ratio from the arc exhaust port to the arc passage.

8. The circuit breaker of claim 1 , wherein the at least one partition part comprises
a second partition part adjacent to the first partition part; and
wherein an arc moves through first and second passages located between the first partition part and the second partition part.

9. The circuit breaker of claim 8 , wherein:
the first passage is defined as a space between a first side of the first guide protrusion and the first partition part, and
the second passage is defined as a space between a second side of the first guide protrusion and the second partition part.

10. The circuit breaker of claim 1 , wherein the arc passage is formed by a passage guide part, and
the arc guide part extends from the arc exhaust port to make contact with the passage guide part.

11. The circuit breaker of claim 1 , wherein a passage of the arc guide part is gradually decreased from the arc exhaust port to the arc passage.

Assignees

• Lsis Co Ltd

Inventors

• Jang Bong Yun

Classifications

• H01H9/342 Primary

  Venting arrangements for arc chutes · CPC title

• H01H73/18 Primary

  Means for extinguishing or suppressing arc {(magnet coil acting as blow-out device H01H71/38)} · CPC title

• H01H33/53 Primary

  Cases (for switchgear H02B1/26); Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices · CPC title

• H01H71/02

  Housings; Casings; Bases; Mountings · CPC title

• H01H73/06

  Housings; Casings; Bases; Mountings · CPC title