Filter assembly for a circuit breaker arc chamber

Patent metadata

Field	Value
Publication number	US-2016240337-A1
Application number	US-201615044353-A
Country	US
Kind code	A1
Filing date	Feb 16, 2016
Priority date	Feb 17, 2015
Publication date	Aug 18, 2016
Grant date	—

Abstract

A filter assembly for a circuit breaker arc chamber includes a coarse filter layer defining an outlet layer, having an upstream side and a downstream side opposite the upstream side, and a fine filter layer defining an inlet layer, disposed on the upstream side of the coarse filter layer.

First claim

What is claimed is:

1 . A circuit breaker comprising:
a stationary contact; a movable contact; and an arc chamber arranged adjacent at least one of the stationary contact and the movable contact, the arc chamber including a filter assembly comprising: a coarse filter layer defining an outlet layer, having an upstream side and a downstream side opposite the upstream side; and a fine filter layer defining an inlet layer, disposed on the upstream side of the coarse filter layer.

2 . The circuit breaker according to claim 1 , further comprising: one or more intermediate layers positioned between the fine filter layer and the coarse filter layer.

3 . The circuit breaker according to claim 1 , wherein each of the coarse filter layer and the fine filter layer are formed from mesh screens defining a plurality of openings therethrough.

4 . The circuit breaker according to claim 3 , wherein the mesh screen comprises a metallic mesh.

5 . The circuit breaker according to claim 4 , wherein the metallic mesh is formed from a magnetic steel.

6 . The circuit breaker according to claim 5 , wherein the mesh screen is formed from a non-magnetic material.

7 . The circuit breaker according to claim 1 , wherein the filter assembly includes an upstream filter layer, a downstream filter layer and a plurality of intermediate filter layers, wherein the coarse filter layer and the fine filter layer form two of the plurality of intermediate filter layers.

8 . The circuit breaker according to claim 1 , wherein the filter assembly further comprises a plurality of intermediate filter layers, disposed therebetween the inlet layer and the outlet layer.

9 . The circuit breaker according to claim 8 , wherein the upstream filter layer defines a first plurality of openings therethrough, the downstream filter layer defines a second plurality of openings threrthrough, and each of the plurality of intermediate filter layers define a respective plurality of intermediate openings, wherein the first plurality of openings are smaller than the second plurality of openings and each of the plurality of intermediate openings.

10 . The circuit breaker according to claim 8 , wherein the upstream filter layer defines a first plurality of openings, the downstream filter layer defines a second plurality of openings, and each of the plurality of intermediate filter layers define a respective plurality of intermediate openings, wherein the plurality of intermediate openings of one of the plurality of intermediate layers is smaller than the first plurality of openings, the second plurality of openings, and the intermediate openings of each of the other intermediate layers.

Assignees

• Gen Electric

Inventors

• Fonseca Shawn Couceiro
• Tiwari Dhirendra Kumar
• Upadhyay Hardik

Classifications

• H01H73/18

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

• H01H9/342 Primary

  Venting arrangements for arc chutes · CPC title

• H01H33/10 Primary

  Metal parts · CPC title