KR101276369B1 - Circuit breaker - Google Patents

Abstract

PURPOSE: A molded case circuit breaker is provided to implement a sealed structure with vertically coupling a bottom base and a top base, thereby improving the assembling property of a product. CONSTITUTION: A molded case circuit breaker includes multiple fixing members(110), multiple moving members, multiple arc chambers, a bottom base(140), and a top base(150). The fixing members form fixing contact points. The moving members form moving contact points. The arc chambers remove arcs from the contact points. The bottom base separately houses the arc chambers. The top base separately seals the arc chambers.

Description

Circuit Breakers {CIRCUIT BREAKER}

The present application relates to a circuit breaker, and more particularly, a device that can open and close the converter by manual or electrical operation, and in the device that automatically cuts off the current in the abnormal state such as overload and short circuit, the interior is vertically coupled structure Each phase inside is sealed and prevents the inflow of the melt in the event of a short circuit, and relates to a circuit breaker for preventing degradation of insulation performance.

In particular, in the vertical coupling structure therein, a plurality of fixing bars are fixed to the lower base to form a fixed contact, and a plurality of moving tables are arranged on the upper part to form a moving contact, and between the fixed contact and the moving contact, Arc chambers surrounding the movable contact are disposed, and in the upper part of the configuration, a pair is connected to the bottom base and vertically coupled to the wiring breaker for individually sealing the plurality of stators, the plurality of movable tables and the arc chambers.

In general, the circuit breaker can open and close the converter by manual or electrical operation, and automatically cuts off the current in case of abnormality such as overload and short circuit.In case of abnormality, the melt flows into the circuit breaker and the insulation performance is reduced. Can cause problems.

In addition, the conventional circuit breaker requires separate parts for sealing each phase in such a manner that the mobile contacts are assembled on the side to be sealed and insulated, thereby causing a problem in that the assembly of the product is degraded.

Korean Laid-Open Patent Publication No. 10-2004-0079825 relates to a safety device for a circuit breaker, and more particularly, in a live state during installation and detachment work on an external base of a plug-in type circuit breaker. It is a safety device for protecting the user from possible safety accidents and relates to a safety device that can restrain the opening and closing mechanism of the circuit breaker in a tripped state. In order to achieve the above object, the present invention has an opening and closing mechanism for opening and closing a circuit and a cross bar for operating the opening and closing mechanism in a trip position, and in the circuit breaker for wiring installed on an outer base, the opening and closing mechanism is operated in a trip position. A press trip mechanism movable in a direction to pressurize the crossbar rotationally or to release the pressurization of the crossbar; A support member fixed to the bottom of the circuit breaker and rotatably supported by the support member, the wiring breaker being rotated in one direction when the circuit breaker is installed on the outer base and the other when the wiring breaker is separated from the outer base. A first lever that provides an action force while rotating in a second direction, a spring that provides an elastic force to rotate the other side to the first lever, and one end is connected to the first lever and the other end is pressurized to the pressure trip mechanism. When the first lever is rotated in one direction, the pressure on the pressure trip mechanism is released to release the crossbar, and when the first lever is rotated in the other direction, the pressure bar is pressed to trip the crossbar. A safety mechanism assembly having a second lever for urging to rotate to a position; And a protrusion for protruding in a horizontal direction from the air pressure trip mechanism to receive a pressing force from the second lever. When the circuit breaker is separated from the external base, the opening / closing mechanism is always kept tripped. Protects users from the risk of electric shock.

Korean Utility Model Application No. 20-2004-0035030 adds a separate component that minimizes the discharge of arc gas generated inside the single-pole breaking unit of the wiring breaker through unintended routes and prevents leakage of gas pressure. A circuit breaker for which configuration is unnecessary. The circuit breaker according to the present invention includes a fixed contactor and a movable contactor, a shaft for rotatably supporting the movable contactor, and an insulating material case for rotatably supporting the shaft, and having a plurality of single pole blocking units provided for each phase. In the circuit breaker for wiring,

The shaft is a cylindrical member having an edge projecting in the axial direction from the periphery of both sides in the axial direction, and a rotation shaft projecting in the axial direction from the center of the both sides in the axial direction; In order to support the shaft rotatably and prevent gas pressure leakage, the casing of the single-pole blocking unit has a diameter larger than the diameter of the shaft and a circular jaw portion formed to have a predetermined height in the axial direction, and the jaw It is formed to have a predetermined height in the axial direction from the central portion of the portion characterized in that it comprises a bearing groove for rotatably sealing and supporting the rotating shaft portion of the shaft.

Korean Laid-Open Patent Publication No. 10-2004-0079825 uses a pressurized gas generated by the generation of an arc to obtain a circuit breaker with high density and high breaking performance.

The circuit breaker according to the present invention includes a stator having a fixed contact, a rotatable mover having a movable contact that is in contact with and detachable from a fixed contact at one end, and a rotation center at another end, and surrounding the stator and the mover to shut off current. A case is formed in one side of the arc generating position, and a case in which an accumulating space for temporarily storing the pressurized gas pressurized by the arc generated between the fixed contact and the movable contact on one side of the arc generating position, and is stored in the accumulating space at the time of breaking the current. It is provided with the exhaust port provided in the other side of the generation position of the arc in a case so that the pressurized gas may pass through between a fixed contact and a movable contact.

Korean Patent Publication No. 10-2004-0079825 Korean Utility Model Application No. 20-2004-0035030 Korean Patent Publication No. 10-2004-0079825

The present application is to provide a circuit breaker to prevent the inflow of the melt into the circuit breaker in the event of an attic accident through the sealing and insulation of each phase, and to prevent the degradation of insulation performance due to the inflow of the melt.

The present application is to provide a circuit breaker that can easily secure the short circuit performance by shortening the arc extinguishing time due to the internal pressure rise in the event of a short circuit through the sealing of each phase.

The present application is to provide a circuit breaker for implementing the sealed structure of each phase through the vertical coupling of the lower base and the upper base, the structure is simple and can increase the assembly of the product.

Among the embodiments, the circuit breaker may include a plurality of fixing bars forming fixed contacts, and may be rotated through a switch to be connected to or separated from the plurality of fixing bars, and a plurality of moving parts forming a moving contact facing the fixed contacts. A plurality of arc chambers covering the contact portions of the plurality of stators and the plurality of movable stages to erase an arc generated at the contact portion, the plurality of movable stages in the rotation direction, the plurality of fixing rods And a unitary bottom base for individually receiving the plurality of arc chambers and a pair with the bottom base to integrally seal the plurality of movable seats, the plurality of fixtures and the plurality of arc chambers separately. It includes a top base.

In one embodiment, the plurality of fasteners may be individually fixed to the bottom base.

In an embodiment, the plurality of fixing rods may further include a shape in which the fixing contact is bent into a 'U' shape.

In one embodiment, the plurality of moving tables are coupled to a rotating shaft providing a center of the rotation and the movable shaft connected to the switch, thereby moving the movable shaft through the switch to move the plurality of moving tables about the rotating shaft. Can be rotated.

In one embodiment, the plurality of arc chambers may be formed of a lattice-shaped plate stacked structure to cover the upper end of the fixed contact of the plurality of fixing bars.

In one embodiment, the bottom base is composed of the fixing portion of the plurality of fixing rods and the seating portion of the plurality of movable stages, it may be integrally molded with a curable resin.

In one embodiment, the upper base may be partitioned and integrally formed with a curable resin so as to individually seal the plurality of fixed bases, the plurality of movable bases, and the plurality of arc chambers.

In one embodiment, the lower base and the upper base may be vertically coupled.

In one embodiment, the switch is located on the upper portion of the upper base, it is possible to rotate the plurality of movable tables through the movable shaft.

The circuit breaker and related technology (s) of the present application can prevent the inflow of the melt into the circuit breaker in the event of a short circuit through the sealing and the insulation of each phase, and prevent the degradation of the insulation performance due to the inflow of the melt.

The circuit breaker and related technology (s) of the present application may easily secure short circuit performance by shortening an arc extinguishing time due to an internal pressure increase when a short circuit accident occurs through the sealing of each phase.

The circuit breaker and the related technology (s) of the present application can implement the sealed structure of each phase through the vertical coupling of the lower base and the upper base, thereby simplifying the structure and increasing the assembly of the product.

1 is a perspective view illustrating a circuit breaker according to an exemplary embodiment of the disclosed technology.
FIG. 2 is an exploded view illustrating the internal structure of the circuit breaker of FIG. 1.
3 is a perspective view illustrating an assembled shape of the internal structure of the circuit breaker of FIG. 2.
4 is an exploded view for explaining a method of driving an internal structure of the circuit breaker of FIG. 3.
5 is an enlarged view illustrating a plurality of moving tables of FIG. 1.
6 is an enlarged view illustrating a lower base of FIG. 1.

The description of the disclosed technique is merely an example for structural or functional explanation and the scope of the disclosed technology should not be construed as being limited by the embodiments described in the text. That is, the embodiments may be variously modified and may have various forms, and thus the scope of the disclosed technology should be understood to include equivalents capable of realizing the technical idea. In addition, the objects or effects presented in the disclosed technology does not mean that a specific embodiment should include all or only such effects, and thus the scope of the disclosed technology should not be understood as being limited thereto.

Meanwhile, the meaning of the terms described in the present application should be understood as follows.

Terms such as "first" and "second" are intended to distinguish one component from another component, and the scope of rights should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring to", should be interpreted as well.

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the disclosed technology belongs, unless otherwise defined. The terms defined in the commonly used dictionary should be interpreted to coincide with the meanings in the context of the related art, and should not be interpreted as having ideal or excessively formal meanings unless clearly defined in the present application.

1 is a perspective view illustrating a circuit breaker according to an exemplary embodiment of the disclosed technology, and FIG. 2 is an exploded view illustrating an internal structure of the circuit breaker of FIG. 1.

1 to 2, the circuit breaker 100 includes a plurality of fixing rods 110, a plurality of moving stages 120, a plurality of arc chambers 130, a lower base 140, and an upper base 150. ) And the switch 160. In one embodiment, the circuit breaker 100 may open and close the converter by rotating the plurality of moving tables 120 by the movement of the switch 160.

The plurality of fixing rods 110 form a fixed contact. In one embodiment, the plurality of fasteners 110 may be individually fixed to the fastener holder 141 on the bottom base 140. In addition, one end of forming the fixed contact of the plurality of fixing rods 110 may further include a shape bent in a 'U' shape. The U-shaped bending reverses the current flow direction of the plurality of fixing units 110 and the plurality of moving units 120 to generate an electron repulsion force between the plurality of fixing units 110 and the plurality of moving units 120 in an abnormal state. To increase.

5 is an enlarged view illustrating a plurality of moving tables of FIG. 1. 1, 2, and 5, the plurality of moving tables 120 may be rotated through the switch 160 to be connected or separated from the plurality of fixing bars 110, and to form a moving contact opposite to the fixed contacts. do. In one embodiment, the plurality of moving tables 120 is coupled to the pivot shaft 121 which provides the center of rotation and the movable shaft 122 connected to the switch 160, the movable shaft 122 through the switch 160 ) To rotate the plurality of moving bases 120 around the pivot shaft 121.

The plurality of arc chambers 130 covers the contact portions of the plurality of fixing rods 110 and the plurality of moving stages 120 to erase the arc generated at the contact portions. In one embodiment, the plurality of arc chambers 130 may be formed in a lamination structure of a lattice plate to cover the upper ends of the fixed contacts of the plurality of fixing bars 110.

FIG. 6 is an enlarged view of the lower base 140 of FIG. 1. 1, 2, and 6, the bottom base 140 is integrally formed to individually accommodate the plurality of fixing rods 110 and the plurality of moving stages 120. In one embodiment, the bottom base 140 is composed of the fixing fixture 141 and the movable seat mounting portion 142, and may be integrally molded with a plastic resin to have a solid strength.

The upper base 150 is paired with the lower base 140 to be integrally formed to individually seal the plurality of fixing units 110, the plurality of moving tables 120, and the plurality of arc chambers 130. . In one embodiment, the upper base 150 is divided into sections to seal the plurality of fixed bases 110, the plurality of movable plates 120, and the plurality of arc chambers 130 separately, and made of a curable resin. It can be integrally formed to have a rigid strength.

In one embodiment, the lower base 140 and the upper base 150 are partitioned to individually receive a plurality of stators 110, a plurality of movable tables 120, and a plurality of arc chambers 130. It can be divided and joined vertically to seal each phase. The structure of enclosing each phase by such a vertical coupling can secure the short circuit performance by shortening the arc extinguishing time due to the internal pressure rise in the event of a short circuit accident, and can increase the assembly of the product due to the simple structure.

The switch 160 includes a movable shaft connector 161 coupled to the movable shaft 122. In one embodiment, the switch 160 may move the movable shaft 122 through the movable shaft connecting portion 161, thereby rotating the plurality of movable tables 120 about the pivot shaft 121. have.

3 is a perspective view illustrating an assembled shape of the internal structure of the circuit breaker 100 of FIG. 2, and FIG. 4 is an exploded view illustrating a method of driving the internal structure of the circuit breaker 100 of FIG. 3.

3 and 4, the internal structure of the circuit breaker 100 includes a plurality of fixing rods 110, a plurality of moving stages 120, a plurality of arc chambers 130, a lower base 140, and an upper base ( 150 and the switch 160.

The plurality of fixing units 110 protrude between the lower base 140 and the upper base 150. In one embodiment, the plurality of fasteners 110 protrude through the groove formed by the bottom base 140. Protruding portions of the plurality of fixing rods 110 may be connected to an external converter.

When the switch 160 is rotated in a clockwise direction, the plurality of movable bases 120 are rotated, and the rotation of the plurality of movable bases 120 is rotated about the pivot shaft 121 so that a portion of the movable shaft 122 is plural. Lift the mobiles 120. As a result, when the switch 160 is turned clockwise, the plurality of movable bases 120 are also turned clockwise so that the plurality of fixed bases 110 and the plurality of movable bases 120 are electrically disconnected. In this situation, an arc may be generated, but the plurality of arc chambers 130 extinguish the arc.

On the contrary, when the switch 160 is turned in the counterclockwise direction, the plurality of moving tables 120 are rotated, and the rotation of the plurality of moving tables 120 is rotated about the rotating shaft 121 to move the movable shaft 122. The portion lowers the plurality of movable tables 120. As a result, when the switch 160 is turned counterclockwise, the plurality of movable bases 120 are also turned counterclockwise so that the plurality of fixed bases 110 and the plurality of movable bases 120 are electrically connected. In this situation, an arc may be generated, but the plurality of arc chambers 130 extinguish the arc.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit and scope of the present invention as set forth in the following claims It can be understood that

110: a plurality of fixing rods 120: a plurality of moving rods
121: rotating shaft 122: movable shaft
130: a plurality of arc chambers 140: bottom base
141: fixing stand fixing part 142: mobile seat mounting portion
150: upper base 160: switch
161: movable shaft connection

Claims (9)

A plurality of fixtures forming a fixed contact;
A plurality of movable stages which are rotated through a switch to be connected or separated from the plurality of fixed stages, and form a movable contact facing the fixed contacts;
A plurality of arc chambers covering the contact portions of the plurality of fixing rods and the plurality of moving stages to erase arcs generated at the contact portions;
An integrated bottom base configured to individually receive the plurality of moving tables, the plurality of fixing tables, and the plurality of arc chambers in the rotation direction; And
And an integrated upper base paired with the lower base to individually seal the plurality of movable seats, the plurality of fixed seats, and the plurality of arc chambers. The method of claim 1, wherein the plurality of fasteners
Circuit breaker, characterized in that fixed to the lower base individually. The method of claim 2, wherein the plurality of fasteners
And a shape in which the fixed contact is bent into a 'U' shape. The method of claim 1, wherein the plurality of moving tables
And a movable shaft coupled to a pivot shaft providing a center of the pivot and the switch, thereby moving the movable shaft through the switch to rotate the plurality of movable stands about the pivot shaft. The method of claim 1, wherein the plurality of arc chambers are
The circuit breaker of claim 2, wherein a grid-like plate is formed in a stacked structure to surround upper ends of the fixed contacts of the plurality of fixing bars. The method of claim 1, wherein the lower base is
And a mounting portion of the plurality of fixing rods and a seating portion of the plurality of moving rods, wherein the circuit breaker is integrally formed with a curable resin. The method of claim 1, wherein the top base is
And the compartments are divided and integrally formed of a curable resin to individually seal the plurality of fixing bars, the plurality of moving tables, and the plurality of arc chambers. The circuit breaker according to claim 6 or 7, wherein the lower base and the upper base are vertically coupled. The method of claim 1, wherein the switch
Located in the upper portion of the upper base, the circuit breaker, characterized in that the plurality of movable bases can be rotated through the movable shaft connected to the switch.

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