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US 12,718,996 B2Granted
Arc extinguishing unit and air circuit breaker comprising same
AssigneeLs Electric Co., Ltd.
InventorSeung Pil Yang
Life of this patent
Estimating the term…
Abstract
Disclosed are an arc extinguishing unit and an air circuit breaker comprising the same. An arc extinguishing unit according to an embodiment of the present disclosure includes a gassing material that generates molecules that extinguish an arc when heat generated by the arc is applied. Accordingly, the arc can be extinguished quickly. In addition, the arc extinguishing unit includes an outer support plate made of glass fiber and has a mechanically and thermally strong side plate part, so that burnout due to arc heat can be prevented.
Claims11
An arc extinguishing unit, comprising:
- a plurality of side plate parts spaced apart from each other and disposed to face each other;
- a plurality of grids located between the plurality of side plate parts, spaced apart from each other, and coupled to the plurality of side plate parts, respectively;
- and
- a cover assembly disposed above the plurality of grids and configured to cover the plurality of grids,
- wherein each side plate part of the plurality of side plate parts comprises:
- a gassing material that generates molecules that extinguish an arc when heat generated by the arc is applied,
- an outer support plate, disposed outside the gassing material, coupled to the plurality of grids, and pressurizing and fixing the gassing material toward the plurality of grids,
- wherein each grid of the plurality of grids comprises a plurality of protrusion parts protruding from both side surfaces and coupled to the plurality of side plate parts,
- wherein each protrusion part of the plurality of protrusion parts penetrates the gassing material and the outer support plate of each side plate part of the plurality of side plate parts and is coupled to the gassing material and the outer support plate of each side plate part of the plurality of side plate parts, and
- wherein the cover assembly comprises:
- an upper frame disposed at a top and through which a lattice exhaust outlet is formed in a central portion;
- a mesh part disposed below the upper frame and composed of a plurality of layers, each layer having different wire diameters;
- a first insulation filter disposed below the mesh part and having a first exhaust hole formed in a partial area thereof, wherein a plurality of exhaust holes, aligned in a width direction and a longitudinal direction, are formed in the first insulation filter, and
- wherein the first insulation filter is composed of:
- a first region in which exhaust holes of the plurality of exhaust holes are formed in an entire area along the width direction;
- a second region in which exhaust holes of the plurality of exhaust holes are formed in a partial area in the width direction;
- and
- a third region in which exhaust holes of the plurality of exhaust holes are not formed;
- a second insulation filter disposed below the first insulation filter and having a second exhaust hole formed in an area different from the first exhaust hole of the first insulation filter;
- and
- a spacer interposed between the first insulation filter and the second insulation filter to maintain a distance between the first insulation filter and the second insulation filter.
18 more elements
An air circuit breaker, comprising:
- a fixed contact;
- a movable contact configured to be movable in a direction toward or away from the fixed contact;
- and
- an arc extinguishing unit disposed adjacent to the fixed contact and the movable contact, and configured to extinguish an arc generated when the fixed contact and the movable contact are spaced apart,
- wherein the arc extinguishing unit comprises:
- a plurality of side plate parts spaced apart from each other and disposed to face each other;
- a plurality of grids located between the plurality of side plate parts, spaced apart from each other, and coupled to the plurality of side plate parts, respectively;
- and
- a cover assembly disposed above the plurality of grids and configured to cover the plurality of grids, and
- wherein each side plate part of the plurality of side plate parts comprises:
- a gassing material that generates molecules that extinguish the arc when heat generated by the arc is applied;
- and
- an outer support plate disposed outside the gassing material, coupled to the plurality of grids, and pressurizing an fixing the gassing material toward the plurality of grids,
- wherein each grid of the plurality of grids comprises a plurality of protrusion parts protruding from both side surfaces and coupled to the plurality of side plate parts, each protrusion part of the plurality of protrusion parts comprising:
- a body part extending from a side surface of a respective grid;
- and
- a first protrusion and a second protrusion extending from the body part to both sides,
- wherein a U-groove capable of absorbing left and right deformation of the first protrusion and the second protrusion by a first external force is formed in a space between the first protrusion and the second protrusion, and
- wherein a concave groove capable of absorbing back and forth deformation of the first protrusion and the second protrusion by a second external force is formed between the first protrusion and the second protrusion and the body part.
16 more elements
An arc extinguishing unit, comprising:
- a plurality of side plate parts spaced apart from each other and disposed to face each other;
- a plurality of grids located between the plurality of side plate parts, spaced apart from each other, and coupled to the plurality of side plate parts, respectively;
- and
- a cover assembly disposed above the plurality of grids and configured to cover the plurality of grids,
- wherein each side plate part of the plurality of side plate parts comprises:
- a gassing material that generates molecules that extinguish an arc when heat generated by the arc is applied,
- an outer support plate, disposed outside the gassing material, coupled to the plurality of grids, and pressurizing and fixing the gassing material toward the plurality of grids,
- wherein each grid of the plurality of grids comprises a plurality of protrusion parts protruding from both side surfaces and coupled to the side plate parts, each protrusion part of the plurality of protrusion parts comprising:
- a body part extending from a side surface of a respective grid;
- and
- a first protrusion and a second protrusion extending from the body part to both sides,
- wherein a U-groove capable of absorbing left and right deformation of the first protrusion and the second protrusion by a first external force is formed in a space between the first protrusion and the second protrusion, and
- wherein a concave groove capable of absorbing back and forth deformation of the first protrusion and the second protrusion by a second external force is formed between the first protrusion and the second protrusion and the body part.
10 more elements
Dependencies are inferred from the claim text.