KR20170042995A - terminal contact structure for withdrawable circuit breaker - Google Patents

terminal contact structure for withdrawable circuit breaker Download PDF

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Publication number
KR20170042995A
KR20170042995A KR1020150142280A KR20150142280A KR20170042995A KR 20170042995 A KR20170042995 A KR 20170042995A KR 1020150142280 A KR1020150142280 A KR 1020150142280A KR 20150142280 A KR20150142280 A KR 20150142280A KR 20170042995 A KR20170042995 A KR 20170042995A
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KR
South Korea
Prior art keywords
terminal
phase
circuit breaker
enclosure
contact
Prior art date
Application number
KR1020150142280A
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Korean (ko)
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KR101792060B1 (en
Inventor
이창훈
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(주)서전기전
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Priority to KR1020150142280A priority Critical patent/KR101792060B1/en
Publication of KR20170042995A publication Critical patent/KR20170042995A/en
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Publication of KR101792060B1 publication Critical patent/KR101792060B1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
    • H02B11/127—Withdrawal mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)

Abstract

The present invention relates to a terminal connection structure for a drawer-type circuit breaker, comprising: a switchboard enclosure; A three-phase enclosure terminal provided inside the switchgear enclosure and having a fixed terminal on the input side and a fixed terminal on the load side for energizing current; A three-phase circuit breaker terminal having an input-side movable terminal and a load-side movable terminal corresponding to the three-phase enclosure terminal, and a circuit breaker body electrically connecting the three-phase circuit breaker terminal; And a lead-out unit fixedly supporting the circuit breaker main body and driven in a pull-in or pull-out direction with respect to the switchboard enclosure so as to selectively apply or cut off current, wherein the three-phase breaker terminal is made of a flat plate member And the three-phase enclosure terminal has a structure in which a front space and an upper space and a lower space are opened to accommodate the thickness side of the three-phase circuit breaker terminal.
As a result, not only the size of the external appearance of each terminal can be effectively reduced, but also the manufacturing process is simple and the frictional resistance between the terminals can be greatly reduced, so that the wear and contact failure can be suppressed and the operational reliability can be further improved .

Description

Technical Field [0001] The present invention relates to a terminal contact structure for a circuit breaker,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal connection structure for a draw-out type circuit breaker, and more particularly, to a terminal connection structure for a draw-out type circuit breaker, which can improve the connection structure between the terminals for interrupting and closing the current and reducing the size thereof compactly, Type breaker terminal connection structure.

Generally, when a power plant, a substation, or a building in which an electric facility is installed, an opening / closing device for protecting electrical components such as a generator, a transformer, and a load is installed when a current, a voltage, . The switchgear is provided with a circuit breaker, a switch, or a disconnector (hereinafter referred to as a "circuit breaker") for opening and closing a circuit.

In addition, the circuit breaker has a fixed type and a draw-out type, and a draw-out type circuit breaker which is convenient for testing and maintenance is widely used.

Hereinafter, a conventional draw-out type circuit breaker will be described with reference to FIG.

As shown in the drawing, the conventional draw-out type circuit breaker includes an enclosure 10, a breaker main body 20 installed in the enclosure 10, and a circuit breaker main body 20 supporting the breaker main body 20, (30) which is capable of being pulled out or drawn out from the enclosure (10).

The enclosure 10 is provided with an input side fixed terminal 11 and a load side fixed terminal 12 which are in electrical contact with the breaker main body 20 to energize the current.

The breaker main body 20 is provided with a breaker terminal 23 constituted by an input side movable terminal 21 and a load side movable terminal 22 that are in contact with the enclosure terminal 13 in a corresponding manner.

The enclosure terminal 13 and the breaker terminal 23 are formed in a circular shape having a complementary fitting structure.

The take-out unit 30 is installed on the enclosure 10 and is a bogie for driving the enclosure 10 in a direction of drawing or pulling out the case 10 in a state where the breaker body 20 is seated.

However, since the drawer-type circuit breaker according to the related art has a circular coupling structure with the enclosure terminal 13 and the breaker terminal 23, the size of the terminal according to the outer shape of the circuit breaker is large and precision machining The manufacturing cost is increased, and mechanical frictional resistance due to complementary fitting is increased, so that deformation and contact failure due to wear are likely to occur.

In addition, when the enclosure terminal 13 and the breaker terminal 23 are viewed from the plane, the center of gravity of the drawing device 30 is eccentrically arranged to one side. Therefore, in order to align the eccentric center of gravity, the circuit breaker terminal 23 must be artificially formed so as to face the central portion or the other end of the drawing device 30, or a separate center member must be additionally installed. Or the number of parts is increased.

Korean Patent Laid-Open Publication No. 2014-0106322 (Apr. 31, 2014)

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and it is an object of the present invention to improve the connection structure between the terminals for interrupting and closing the current, thereby compactly reducing the size thereof and further improving the reliability of operation And to provide a terminal connection structure for a draw-out type circuit breaker.

In order to achieve the above-mentioned object, a terminal connection structure for a drawer-type circuit breaker according to the present invention comprises: an electric distribution box enclosure; A three-phase enclosure terminal provided inside the switchgear enclosure and having a fixed terminal on the input side and a fixed terminal on the load side for energizing current; A three-phase circuit breaker terminal having an input-side movable terminal and a load-side movable terminal corresponding to the three-phase enclosure terminal, and a circuit breaker body electrically connecting the three-phase circuit breaker terminal; And a lead-out unit fixedly supporting the breaker main body and driven in a pull-in or pull-out direction with respect to the switchboard enclosure so as to selectively apply or cut off current, wherein the three-phase breaker terminal is made of a flat plate member having smooth surfaces on one side and the other side And the three-phase enclosure terminal has a structure in which a front space and an upper space and a lower space are opened to accommodate the thickness side of the three-phase circuit breaker terminal.

The three-phase enclosure terminals are respectively arranged in a serial direction at a predetermined interval with respect to the front-rear direction in which the draw-out unit moves, and the breaker main body is arranged along the moving direction of the draw- And are arranged in a series direction.

Wherein the three-phase enclosure terminal comprises: a current-carrying terminal for energizing a current; a first contact terminal and a second contact terminal which are in contact with one end and the other end of the end with the current-carrying terminal interposed therebetween; And an elastic fixing means for elastically fixing the terminal and the second contact terminal.

The elastic fixing means includes a fastening bolt which passes through the first contact terminal and the second contact terminal and is screwed to the current supply terminal and an elastic spring interposed between the fastening bolt and the first contact terminal and the second contact terminal, .

The first contact terminal and the second contact terminal are elastically moved and elastically restored in a vertical direction according to a position where the three-phase breaker terminal is attached and detached, when the elastic fixing means is viewed from a plane.

The first contact terminal and the second contact terminal are provided at opposite sides thereof with a first inclined portion for easily guiding the attachment and detachment of the three-phase circuit breaker terminal, and the other side facilitates elastic movement and elastic restoring movement in the vertical direction And a second inclined portion is formed.

The three-phase enclosure terminal disposed in the serial direction is provided at a position higher than the inside of the cabinet enclosure toward the entrance of the drawer unit to secure an insulation distance in the vertical direction, And the length of the terminal is increased toward the entrance and exit of the draw-out unit from the inside of the cabinet to correspond to the differential height of the three-phase enclosure terminal.

The three-phase enclosure terminal and the three-phase circuit breaker terminal are spaced apart from each other in the width direction so as to ensure a lateral insulation distance between them when viewed from the side.

According to the present invention having the above-described configuration, the three-phase circuit breaker terminal is made of a flat plate member smooth on one surface and the other surface, and the three- And a joint space portion in which the upper and the lower portions are opened. Therefore, the size of the external appearance of each terminal can be effectively reduced, the manufacturing process can be simplified, and the frictional resistance between the terminals can be greatly reduced. And the operation reliability can be further improved.

In addition, the three-phase enclosure terminal and the breaker main body are respectively arranged in the serial direction at a predetermined interval with respect to the front-rear direction in which the draw-out unit moves, thereby selectively supplying or interrupting the current between the three- It is possible to effectively reduce the arrangement of the force for coupling or detachment and to omit the installation of a separate component for adjusting the center of gravity so that the drawing unit can be smoothly driven.

1 is a perspective view showing a configuration of a conventional draw-out type circuit breaker.
2 is a front view showing a terminal connection structure for a draw-out type circuit breaker according to an embodiment of the present invention.
Figure 3 is a side view of Figure 2;
Fig. 4 is a plan view showing the configuration and operation of the three-phase enclosure terminal of Fig. 2. Fig.
5 is a front view showing a process of releasing the three-phase circuit breaker terminal from the three-phase enclosure terminal of FIG.
6 is a front view showing a state in which the 3-phase circuit breaker terminal of FIG. 2 is completely drawn out to the outside of the cabinet.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 2 to 6 attached hereto.

As shown in the drawing, the terminal connection structure for the drawer-type circuit breaker according to the present invention includes a switchboard enclosure 100, an input-side fixed terminal 200a and a load-side fixed terminal 200a, which are installed inside the switchboard enclosure 100, Phase breaker terminal 310 having the input side movable terminal 310a and the load side movable terminal 310b corresponding to the three-phase enclosure terminal 200, A circuit breaker main body 300 for electrically connecting the three-phase breaker terminal 310 to the circuit breaker main body 300 and a circuit breaker main body 300 for fixing or supporting the breaker main body 300, (Not shown).

First, the switchgear cabinet 100 is a structure having a space portion formed therein, and plays a role of safely protecting various components installed in the space portion.

Although it is desirable that the above-mentioned switchboard enclosure 100 is formed by combining a plurality of plates with each other to form a box structure of a hexahedron, it is not limited to this but it can be manufactured in various shapes.

The three-phase enclosure terminal 200 has three input / output terminals fixed to the inside of the cabinet 100, and includes a fixed terminal 200a for inputting current to be drawn into the load, Terminal 200b.

The three-phase enclosure terminal 200 according to the present invention includes a linear connection space portion 310 having a front side and an upper side and a lower side opened to accommodate a thickness side of the three-phase circuit breaker terminal 310, which will be described later, (See Fig. 4).

That is, since the three-phase enclosure terminal 200 is formed in a linear structure bent in a " C " shape, its size can be effectively reduced as compared with a terminal having a circular structure of the prior art, The frictional resistance between the terminals can be greatly reduced, and accordingly the wear and contact failure can be effectively improved.

In addition, since the three-phase enclosure terminal 200 has a structure in which the upper and lower ends are both opened, there is an advantage that the heat dissipation effect can be maximized.

Specifically, the three-phase enclosure terminal 200 includes a current-carrying terminal 210 for energizing current and a first contact terminal 220 (not shown) contacting the one end and the other end of the terminal with the current- And a second contact terminal 230 and an elastic fixing means 240 for elastically fixing the electric current terminal 210, the first contact terminal 220 and the second contact terminal 230.

That is, the three-phase enclosure terminal 200 is configured such that the first contact terminal 220 and the second contact terminal 230 elastically fix both side surfaces of the three-phase circuit breaker terminal 310 by the elastic fixing means 240 So that the three-phase breaker terminal 310 can be stably contacted even if the thickness of the three-phase circuit breaker terminal 310 is made thicker than the design tolerance value or made thin.

The elastic fixing means 240 includes a fastening bolt 241 passing through the first contact terminal 220 and the second contact terminal 230 and screwed to the current terminal 210, And an elastic spring 242 interposed between the first contact terminal 220 and the second contact terminal 230, respectively.

4, when the elastic fixing means 240 is viewed from a plane, the first contact terminal 220 and the second contact terminal 250 are electrically connected to each other according to the position where the three-phase breaker terminal 310 is attached and detached, The elastic member 230 moves in the up and down direction for elastic movement and elastic restoration.

The first contact portion 220 and the second contact portion 230 are formed at one side of the first contact portion 230 with first inclined portions 221 and 231 for easily guiding the attachment and detachment of the three-phase breaker terminal 310, On the other side, second inclined portions 222 and 232 for facilitating elastic movement and elastic restoring motion in the up and down direction are formed.

The first contact terminal 220 and the second contact terminal 230 are formed with spring receiving grooves 220a and 230a for stably supporting the elastic spring 242. [

The breaker main body 300 electrically connects the input side movable terminal 310a corresponding to the three-phase enclosure terminal 200 and the three-phase circuit breaker terminal 310 having the load side movable terminal 310b .

Here, the three-phase circuit breaker terminal 310 is formed of a flat plate member having smooth surfaces on one side and the other side.

The breaker main body 300 is a component detachably coupled to selectively cut off or energize a current drawn from the three-phase enclosure terminal 200.

Also, the three-phase enclosure terminal 200 according to the present invention is arranged in a serial direction at a predetermined interval with respect to the front-rear direction in which the draw-out unit 400 moves, and the breaker main body 300 includes the three- Are arranged in the serial direction along the moving direction of the drawing unit (400) so as to correspond to the respective positions of the terminal (200).

In order to effectively reduce the amount of force that is applied to or disconnected from each other in the process of selectively turning on or off the current between the three-phase enclosure terminal 200 and the three-phase circuit breaker terminal 310 from the drawing unit 400 In addition, it is not necessary to additionally provide additional components for adjusting the center of gravity so that the drawing unit 400 can be smoothly driven.

In other words, conventionally, the circuit breaker main body 300, which is coupled to the three-phase enclosure terminal 200 in parallel, is arranged parallel to the leading end of the drawer unit 400 (see FIG. 1) There is an inconvenience that it is necessary to exert a force to push or pull out the three-phase breaker terminal 310 momentarily when the three-phase circuit breaker terminal 310 is engaged or disengaged with respect to the upper enclosure terminal 200. At this time, There is a problem that the connection part of the three-phase circuit breaker terminal 200 and the three-phase circuit breaker terminal 310 is deformed and the contact failure is likely to occur.

In the meantime, the three-phase enclosure terminal 200 and the three-phase circuit breaker terminal 310 of the present invention are arranged at regular intervals in the serial direction, that is, along the moving direction of the drawing unit 400, There is an advantage that it is possible to omit the installation of a separate component for aligning the center of gravity of the drawing unit 400. Further,

In addition, the three-phase enclosure terminal 200 disposed in the serial direction is provided at a higher position from the inside of the cabinet enclosure toward the entrance of the drawer unit 400 to secure the insulation distance L1 in the vertical direction, Phase breaker terminal 310 of the breaker main body 300 disposed in the direction of the main body 300 is positioned at a position closer to the entrance and exit of the drawer unit 400 from the inside of the cabinet 100 to the entrance and exit of the drawer unit 400 corresponding to the differential height of the three- The longer the length of the link.

Also, the three-phase enclosure terminal 200 and the three-phase circuit breaker terminal 310 disposed in the serial direction can avoid the interference with other terminals due to the difference in height, and also the insulation distance L2 between the terminals There is an advantage that it can secure enough.

The three-phase enclosure terminal 200 and the three-phase circuit breaker terminal 310 are preferably spaced apart from each other in the width direction so as to secure a lateral insulation distance L3 between them when viewed from the side (See FIG. 3).

On the other hand, the drawing unit 400 fixes and supports the breaker main body 300 to selectively apply or cut off a current supplied from the three-phase enclosure terminal 200 to the three-phase circuit breaker terminal 310 So as to drive the switchgear cabinet 100 in the pull-in or pull-out direction.

The drawing unit 400 is formed of an insulating material, and a wheel 410 is installed on the bottom surface to allow rolling movement.

The drawing unit 400 is a well-known constituent element, and a detailed description thereof will be omitted.

According to the present invention thus configured, the three-phase circuit breaker terminal 310 is made of a flat plate member smooth on one surface and the other surface, and the three-phase circuit breaker terminal 200 has a thickness- And the upper and lower coupling spaces 201 are formed so as to be able to be accommodated in the housing 201. The size of the external appearance of each terminal can be effectively reduced, The wear and contact failure can be suppressed and the reliability of operation can be further improved.

The three-phase enclosure terminal 200 and the breaker main body 300 are arranged in the serial direction at regular intervals in the front-rear direction in which the drawer unit 400 moves, It is possible to effectively reduce the arrangement of the force for selectively engaging or disengaging the current between the upper breaker terminal 310 and the center of gravity of the upper breaker terminal 310, It is possible to omit the installation of a separate component.

100: Switchboard enclosure
200: Three-phase enclosure terminal
200a: Fixed terminal on the input side
200b: fixed terminal on the load side
210: energizing terminal
220: first contact terminal
230: second contact terminal
240: elastic fixing means
300: Circuit breaker body
310: Three phase breaker terminal
310a: input side movable terminal
310b: Load side movable terminal
400: withdrawal unit

Claims (8)

Switchboard enclosure;
A three-phase enclosure terminal provided inside the switchgear enclosure and having a fixed terminal on the input side and a fixed terminal on the load side for energizing current;
A three-phase circuit breaker terminal having an input-side movable terminal and a load-side movable terminal corresponding to the three-phase enclosure terminal, and a circuit breaker body electrically connecting the three-phase circuit breaker terminal;
And a withdrawing unit for holding the breaker main body and driving the switchgear enclosure in a pull-in or pull-out direction so as to selectively apply or cut off current,
The three-phase circuit breaker terminal is composed of a flat plate member smooth on one surface and the other surface. The three-phase circuit breaker terminal has a joint space portion opened frontward and top and bottom so as to accommodate the thickness side of the three- And a terminal connecting structure for a drawer-type circuit breaker.
The method according to claim 1,
The three-phase enclosure terminals are respectively arranged in a serial direction at a predetermined interval with respect to the front-rear direction in which the draw-out unit moves, and the breaker main body is arranged along the moving direction of the draw- Are arranged in a direction parallel to the longitudinal direction of the terminal.
3. The method of claim 2,
The three-
An energizing terminal for energizing a current,
A first contact terminal and a second contact terminal which come into contact with one end side and the other end side of the end with the electric current terminal interposed therebetween,
And an elastic fixing means for elastically fixing the electrifying terminal, the first contact terminal, and the second contact terminal.
The method of claim 3,
Wherein the elastic fixing means comprises:
A fastening bolt passing through the first contact terminal and the second contact terminal and screwed to the current terminal, and an elastic spring interposed between the fastening bolt and the first contact terminal and the second contact terminal, respectively Terminal connection structure for withdrawable circuit breaker.
5. The method of claim 4,
Wherein the first contact terminal and the second contact terminal are elastically moved and resiliently restored in a vertical direction according to a position where the three-phase breaker terminal is attached and detached when the elastic fixing means is viewed from a plane. Terminal connection structure.
6. The method of claim 5,
The first contact terminal and the second contact terminal are provided at opposite sides thereof with a first inclined portion for easily guiding the attachment and detachment of the three-phase circuit breaker terminal, and the other side facilitates elastic movement and elastic restoring movement in the vertical direction And the second inclined portion is formed on the second inclined portion.
7. The method according to any one of claims 2 to 6,
The three-phase enclosure terminal arranged in the series direction is provided at a higher position from the inside of the cabinet enclosure to the entrance and exit of the draw-out unit to secure an insulation distance with respect to the vertical direction,
Wherein the three-phase circuit breaker terminal of the breaker main body arranged in the serial direction extends the length of the terminal from the inside of the power distribution board enclosure to the entrance and exit of the drawout unit so as to correspond to the differential height of the three-phase enclosure terminal. Terminal connection structure.
8. The method of claim 7,
Wherein the three-phase enclosure terminal and the three-phase circuit breaker terminal are spaced apart from each other in the width direction so as to ensure a lateral insulation distance of each other when viewed from the side.
KR1020150142280A 2015-10-12 2015-10-12 terminal contact structure for withdrawable circuit breaker KR101792060B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150142280A KR101792060B1 (en) 2015-10-12 2015-10-12 terminal contact structure for withdrawable circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150142280A KR101792060B1 (en) 2015-10-12 2015-10-12 terminal contact structure for withdrawable circuit breaker

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KR20170042995A true KR20170042995A (en) 2017-04-20
KR101792060B1 KR101792060B1 (en) 2017-11-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110277744A (en) * 2019-06-21 2019-09-24 许继电气股份有限公司 The contact apparatus and handcart circuit breaker of handcart circuit breaker

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101044288B1 (en) * 2010-12-03 2011-06-28 (주)서전기전 Switchgear using a bus bar connector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110277744A (en) * 2019-06-21 2019-09-24 许继电气股份有限公司 The contact apparatus and handcart circuit breaker of handcart circuit breaker

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