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US 12,620,536 B2Granted
Circuit breaking unit and air circuit breaker including same
AssigneeLs Electric Co., Ltd.
InventorsYong Ik Park, Han Baek Chung
Life of this patent
Estimating the term…
Abstract
A circuit breaking unit includes a fixed contact, a movable contact in contact with or spaced apart from the fixed contact, a fixed contact terminal having the fixed contact disposed at a lower end thereof and extending upward, a movable contact terminal on which the movable contact is disposed and configured such that the movable contact moves in a direction toward the fixed contact or in a direction away from the fixed contact, and a low runner disposed extending upward from the fixed contact, one end thereof coupled to the fixed contact terminal, and the other end thereof spaced apart from the fixed contact terminal, wherein a magnet unit or a U assembly is disposed between the low runner and the fixed contact terminal.
Claims30
A circuit breaking unit, comprising:
- a fixed contact;
- a movable contact that is in contact with or spaced apart from the fixed contact;
- a protruding contact spaced apart from the movable contact;
- a fixed contact terminal having the fixed contact disposed at a lower end thereof and extending upward;
- a movable contact terminal on which the movable contact is disposed and configured such that the movable contact moves in a direction toward the fixed contact or in a direction away from the fixed contact;
- a low runner disposed extending in a direction away from the fixed contact, one end thereof coupled to the fixed contact terminal, and the other end thereof spaced apart from the fixed contact terminal;
- a holder disposed between the low runner and the fixed contact terminal, extending away from the fixed contact terminal, extending toward the movable contact, having a space formed therein, and protruding from both sides of the low runner;
- and
- a U magnetic body stored in an inner space of the holder and made of a permanent magnet,
- wherein the holder is formed to extend to both sides of the low runner so that when an arc is generated in an arc-generation area, a pressure applied to the arc is increased as the arc-generation area is reduced by an air gap formed between the protruding contact and the holder, and
- wherein the U magnetic body comprises a magnet unit disposed to be extending from the fixed contact terminal between the protruding contact and an arc extinguishing unit disposed above the protruding contact, and disposed to face each other.
8 more elements
A circuit breaking unit, comprising:
- a fixed contact;
- a movable contact that is in contact with or spaced apart from the fixed contact;
- a protruding contact spaced apart from the movable contact;
- a fixed contact terminal having the fixed contact disposed at a lower end thereof and extending upward;
- a movable contact terminal on which the movable contact is disposed and configured such that the movable contact moves in a direction toward the fixed contact or in a direction away from the fixed contact;
- a low runner disposed extending in a direction away from the fixed contact, one end thereof coupled to the fixed contact terminal, and the other end thereof spaced apart from the fixed contact terminal;
- and
- a magnet unit disposed between the low runner and the fixed contact terminal and forming a magnetic field so that a generated arc is subjected to an electromagnetic force toward an arc extinguishing unit disposed above the protruding contact, and
- wherein the magnet unit comprises:
- a first surface magnetized to a N pole;
- and
- a second surface magnetized to a S pole, and
- wherein one of the first surface and the second surface of the magnet unit is disposed in a direction toward the fixed contact, and the other surface is disposed in a direction opposite to the one surface.
10 more elements
A air circuit breaker, comprising:
- a cover;
- an arc extinguishing unit disposed within the cover and comprising a plurality of side plates and a grid coupled between the side plates;
- and
- a circuit breaking unit disposed adjacent to the arc extinguishing unit,
- wherein the circuit breaking unit comprises:
- a fixed contact;
- a movable contact that is in contact with or spaced apart from the fixed contact;
- a protruding contact spaced apart from the movable contact;
- a fixed contact terminal having the fixed contact disposed at a lower end thereof and extending upward;
- a movable contact terminal on which the movable contact and the protruding contact are disposed and configured such that the movable contact moves in a direction toward the fixed contact or in a direction away from the fixed contact;
- a low runner disposed extending upward from the fixed contact, one end thereof coupled to the fixed contact terminal, and the other end thereof spaced apart from the fixed contact terminal;
- a holder disposed between the low runner and the fixed contact terminal, extending away from the fixed contact terminal, extending toward the movable contact, having a space formed therein, and protruding from both sides of the low runner;
- and
- a U magnetic body stored in an inner space of the holder and made of a permanent magnet,
- wherein the holder is formed to extend to both sides of the low runner so that when an arc is generated in an arc-generation area, a pressure applied to the arc is increased as the arc-generation area is reduced by an air gap formed between the protruding contact and the holder,
- wherein the U magnetic body comprises a magnet unit disposed to be extending from the fixed contact terminal between the protruding contact and an arc extinguishing unit disposed above the protruding contact, and disposed to face each other.
13 more elements
A air circuit breaker, comprising:
- a cover;
- an arc extinguishing unit disposed within the cover and comprising a plurality of side plates and a grid coupled between the side plates;
- and
- a circuit breaking unit disposed adjacent to the arc extinguishing unit,
- wherein the circuit breaking unit comprises:
- a fixed contact;
- a movable contact that is in contact with or spaced apart from the fixed contact;
- a protruding contact spaced apart from the movable contact;
- a fixed contact terminal having the fixed contact disposed at a lower end thereof and extending upward;
- a movable contact terminal on which the movable contact is disposed and configured such that the movable contact moves in a direction toward the fixed contact or in a direction away from the fixed contact;
- a low runner disposed extending in a direction away from the fixed contact, one end thereof coupled to the fixed contact terminal, and the other end thereof spaced apart from the fixed contact terminal;
- and
- a magnet unit disposed between the low runner and the fixed contact terminal and forming a magnetic field so that a generated arc is subjected to an electromagnetic force toward the arc extinguishing unit,
- wherein the magnet unit comprises:
- a first surface magnetized to a N pole;
- and
- a second surface magnetized to a S pole, and
- wherein one of the first surface and the second surface of the magnet unit is disposed in a direction toward the fixed contact, and the other surface is disposed in a direction opposite to the one surface.
15 more elements
A circuit breaking unit, comprising:
- a fixed contact;
- a movable contact that is in contact with or spaced apart from the fixed contact;
- a protruding contact spaced apart from the movable contact;
- a fixed contact terminal having the fixed contact disposed at a lower end thereof and extending upward;
- a movable contact terminal on which the movable contact is disposed and configured such that the movable contact moves in a direction toward the fixed contact or in a direction away from the fixed contact;
- a low runner disposed extending in a direction away from the fixed contact, one end thereof coupled to the fixed contact terminal, and the other end thereof spaced apart from the fixed contact terminal;
- a holder disposed between the low runner and the fixed contact terminal, extending away from the fixed contact terminal, extending toward the movable contact, having a space formed therein, and protruding from both sides of the low runner;
- and
- a U magnetic body stored in an inner space of the holder and made of a ferromagnetic body,
- wherein the holder is formed to extend to both sides of the low runner so that when an arc is generated in an arc-generation area, a pressure applied to the arc is increased as the arc-generation area is reduced by an air gap formed between the protruding contact and the holder, and
- wherein the U magnetic body comprises a plurality of magnetic bodies disposed to be extending from the fixed contact terminal between the protruding contact and an arc extinguishing unit disposed above the protruding contact.
8 more elements
Dependencies are inferred from the claim text.