Arc gas venting structure of air circuit breaker

Patent metadata

Field	Value
Publication number	US-10354813-B2
Application number	US-201815946347-A
Country	US
Kind code	B2
Filing date	Apr 5, 2018
Priority date	Apr 11, 2017
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

One or more arc gas outlet holes are formed in a trip device such that an effect of easily venting an arc gas, which flows into the trip device, to the outside through the arc gas outlet holes is provided.

First claim

What is claimed is:

1. An arc gas venting structure of an air circuit breaker, which comprises a body having an accommodation space therein, an over current relay provided in front of the body, a trip device connected to the over current relay and configured to operate a switching mechanism, and the switching mechanism driven by the trip device to adjust contact or separation between a movable contact and a fixed contact, wherein the trip device comprises:
a frame which forms an exterior;
one or more arc gas inlet holes formed at the frame to allow an arc gas to flow into the trip device; and
one or more arc gas outlet holes formed at the frame to vent the arc gas which has flowed into the trip device.

2. The arc gas venting structure of claim 1 , wherein an incline is formed below the body to be adjacent to the one or more arc gas outlet holes.

3. The arc gas venting structure of claim 2 , wherein the one or more arc gas outlet holes are formed to have a lateral length longer than a longitudinal length.

4. The arc gas venting structure of claim 3 , wherein a bottom surface of the one or more arc gas outlet holes is formed to incline toward the incline.

5. The arc gas venting structure of claim 2 , wherein the body comprises a front frame which is located to be adjacent to the trip device and has a bottom at which the incline is formed such that a flow space of the arc gas vented through the one or more arc gas outlet holes is provided through the incline.

6. The arc gas venting structure of claim 5 , wherein the incline is located below the one or more arc gas outlet holes.

7. The arc gas venting structure of claim 1 , further comprising a breaking plate, which allows the arc gas which has flowed into the trip device to move toward the one or more arc gas outlet holes on an inner side of the trip device toward the over current relay.

Assignees

• Lsis Co Ltd

Inventors

• Lee Kyu-Ho

Classifications

• H01H9/342 Primary

  Venting arrangements for arc chutes · CPC title

• H01H71/025

  Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts · CPC title

• H01H73/18 Primary

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

• H01H71/128

  Manual release or trip mechanisms, e.g. for test purposes (two similar push buttons for closing or resetting and opening or tripping H01H71/58; test switches for earth fault circuit breakers H01H83/04) · CPC title

• H01H33/08

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