KR20140062775A

KR20140062775A - Cut out switch

Info

Publication number: KR20140062775A
Application number: KR1020120129563A
Authority: KR
Inventors: 문보배; 임찬재; 박윤근
Original assignee: 한국전력공사
Priority date: 2012-11-15
Filing date: 2012-11-15
Publication date: 2014-05-26

Abstract

An invention relating to a cut-out switch is disclosed. The cut-out switch includes: a fuse holder portion provided at an upper terminal and a lower terminal of a support insulator and having a fuse; a moving joint portion movably coupling the fuse holder portion to the lower terminal; and a fixing prevention portion preventing the moving joint portion from being fixed .

Description

Cutout switch {CUT OUT SWITCH}

The present invention relates to a cut-out switch, and more particularly to a cut-out switch used for protection and disconnection of a transformer.

In general, the cut-out switch is installed on the primary side of the transformer to prevent breakage of the transformer due to the overcurrent flowing from the high-voltage cable, and is used for disconnecting during work such as part replacement for the safety of the operator.

The cut-out switch allows the fuse inside the fuse holder to be fusing when an overcurrent is introduced to prevent breakage of the transformer due to overcurrent.

Further, when the fuse blows, the fuse holder is rotated by the gravity, so that it is possible to check whether the cut-out switch is operated from the outside.

In addition, the cut-out switch is provided with an engagement portion formed of an annular ring or the like on the fuse holder so that the fuse holder can be rotated when necessary in the operation. When the operator pulls the engagement portion with a jig or the like, So that the flow of current can be cut off.

Relevant prior art is disclosed in Korean Patent Laid-Open Publication No. 10-2011-0068722 (published on Jun.22, 2011, entitled "Arrester Built-in Insulator for Cut-out Switch of Transformer").

The cutout switch may be exposed to foreign substances such as changes in temperature and humidity of the outside, salinity, and the like, and the moving joint part may be fixed.

If the moving joint is fixed, even if the fuse blows, the fuse holder is not rotated. Therefore, there is a problem that the blowing of the fuse can not be grasped from the outside.

Therefore, there is a need for improvement.

An object of the present invention is to prevent sticking of a moving joint part of a fuse holder.

A cut-out switch according to the present invention includes: a fuse holder portion provided at an upper terminal and a lower terminal of a support insulator and having a fuse; A moving joint part movably coupling the fuse holder part to the lower terminal; And a sticking prevention part for preventing the moving joint part from being fixed.

The moving joint portion may include a lower terminal bracket coupled to the lower terminal; And a fuse holder bracket coupled to the fuse holder and movably coupling the fuse holder to the lower terminal bracket.

The fixing portion may be disposed between the lower terminal bracket and the fuse holder bracket to prevent the lower terminal bracket and the fuse holder bracket from being fixed.

The fixing portion may include a gap holding portion positioned between the lower terminal bracket and the fuse holder bracket to maintain a gap between the lower terminal bracket and the fuse holder bracket.

The fixing portion may further include coupling portions that are located on both sides of the gap holding portion and couple both sides of the gap holding portion to the lower terminal bracket and the fuse holder bracket.

In addition, the anti-sticking portions are provided on both sides of the lower terminal bracket.

Further, the anti-sticking portion is a torsion spring.

Further, the moving joint part is characterized in that the fuse holder part is rotatably coupled to the lower terminal.

The cut-out switch according to the present invention can maintain the gap between the fuse holder bracket and the lower terminal bracket, thereby preventing the moving joint from being fixed.

Further, in the present invention, a torsion spring may be applied to the anti-sticking portion to prevent sticking of the moving joint portion and to assist rotation of the fuse holder.

1 is a front view showing a schematic state of a cut-out switch according to an embodiment of the present invention.
2 is a view illustrating a fuse holder and a moving joint according to an embodiment of the present invention.
3 is a diagram showing the operation of a cut-out switch according to an embodiment of the present invention.
4 is a view showing a configuration of a moving joint part and a stuck-at portion according to an embodiment of the present invention.
5 is a view showing an assembled state of the moving joint part and the anti-sticking part according to an embodiment of the present invention.

Hereinafter, an embodiment of a cut-out switch according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a front view showing a schematic state of a cut-out switch according to an embodiment of the present invention, FIG. 2 is a view showing a fuse holder and a moving joint according to an embodiment of the present invention, and FIG. FIG. 4 is a view showing a configuration of a moving joint part and a stuck-at portion according to an embodiment of the present invention. FIG.

1 to 4, a cut-out switch according to an embodiment of the present invention includes (1) a fuse holder unit 100, a mobile joint 200, and a stuck-up prevention unit 300.

The fuse holder part 100 is provided between the upper terminal 20 and the lower terminal 30 of the support insulator 10 and has a fuse 110.

The supporting insulator 10 is connected to an upper terminal 20 connected to a high voltage electric wire or the like via an upper side and connected to a lower terminal 30 for transmitting electric power to a transformer or the like, And the like.

The support insulator 10 comprises an insulating material. The current flowing from the high voltage cable to the upper connection terminal 21 flows to the lower connection terminal 31 via the upper support portion 23 and the fuse 110 mounted inside the fuse holder portion 100.

In this embodiment, the lower side of the fuse holder part 100 is rotatably fixed to the lower terminal 30, and the upper side thereof is pressurized and supported by the upper contact metal fitting 25 and the coil spring 27.

In this embodiment, the fuse holder portion 100 includes a fuse 110 and a holder housing 130.

The fuse 110 is located between the upper terminal 20 and the lower terminal 30 and is fused when the overcurrent flows. The fuse 110 is connected to a supporting line 150 including a conductive material on the lower side and the supporting line is coupled to the lower terminal 30 by a supporting line binding portion 160.

The holder housing 130 surrounds the outside of the fuse 110 and includes insulating material. The holder housing 130 is coupled to the upper contact portion 40 at the upper side and coupled to the moving joint portion 200 at the lower side so as to insulate the fuse 110 from the outside, (Fiber Reinforced Plastics).

The movable joint 200 moves the fuse holder 100 to the lower terminal 30 in a movable manner.

In this embodiment, the mobile joint 200 includes a lower terminal bracket 210 and a fuse holder bracket 230.

The lower terminal bracket 210 is coupled to the lower terminal 30. In this embodiment, the lower terminal bracket 210 is rotatably mounted on the lower support 33.

One end of the fuse holder bracket 230 is fitted to the fuse holder 100 and the other end of the fuse holder bracket 230 is coupled to the lower terminal bracket 210 by the bracket fixing part 250 so as to be movable.

5 is a view showing an assembled state of the moving joint part and the anti-sticking part according to an embodiment of the present invention.

Referring to FIG. 5, the anti-sticking portion 300 prevents the moving joint 200 from being stuck.

The fixing portion 300 is positioned between the lower terminal bracket 210 and the fuse holder bracket 230 to prevent the lower terminal bracket 210 and the fuse holder bracket 230 from being fixed.

In the present embodiment, the anti-stiction portion 300 includes a gap holding portion 310.

The gap holding part 310 is positioned between the lower terminal bracket 210 and the fuse holder bracket 230 and maintains the gap between the lower terminal bracket 210 and the fuse holder bracket 230.

The gap holding portion 310 is positioned between the lower terminal bracket 210 and the fuse holder bracket 230 and is fixed by the bracket fixing portion 250. The gap between the lower terminal bracket 210 and the fuse holder bracket 230, May have a variety of shapes and configurations within the spirit of the invention to prevent the attachment portions 230 from sticking together.

For example, the gap holding part 310 may be formed of an injection plastic or an annular ring of metal to prevent the fuse holder bracket 230 from being directly in contact with the part to be coupled to the lower terminal bracket 210.

In the present embodiment, the anti-stiction portion 300 further includes a coupling portion 330.

The coupling portion 330 is located on both sides of the gap holding portion 310 and couples the gap holding portion 310 to the lower terminal bracket 210 and the fuse holder bracket 230. In this embodiment, the coupling part 330 extends from the gap holding part 310 and is fitted into the fixing groove part 240 provided in the lower terminal bracket 210 and the fuse holder bracket 230.

The fixing portion 300 is provided on both sides of the lower terminal bracket 210 to prevent the fuse holder bracket 230 from being deflected to one side with respect to the lower terminal bracket 210. [

In this embodiment, the anti-sticking portion 300 is a torsion spring. In this embodiment, the torsion spring includes a metal material and includes a gap holding portion 310 formed in a coil shape, a coupling portion 330 bent at both ends of the coil shape to be bent and coupled to the fixed groove portion 240, .

Hereinafter, the operation and effect of the cut-out switch 1 according to an embodiment of the present invention will be described.

In the present embodiment, the cut-out switch 1 is attached to the electric pole using the support insulator fixing portion 70 located at one side of the support insulator 10.

The current which has entered the upper terminal 20 from the high voltage cable is transmitted to the lower terminal 30 via the fuse 110 and is transmitted to the transformer connected to the lower terminal 30. [

When an overcurrent flows into the upper terminal 20, the fuse 110 is fused.

When the fuse 110 is melted, the supporting line 150 coupled to the lower side of the fuse 110 is moved downward and the flipper 50, which is supported upward by the supporting line 150, ).

The movable joint 200 is exposed to the external environment so that dust and bird excretion can be introduced between the fuse holder bracket 230 and the lower terminal bracket 210. However, So that the fixing is prevented, and further, the fuse holder bracket 230 is smoothly rotated by the rotational elastic force.

The fuse holder bracket 230 rotates in the counterclockwise direction in FIG. 2 due to the rotational elasticity of the fixing portion 300 and the gravity acting on the fuse holder 100. The lower terminal 30 ) Of the current flowing through the transistor.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

1: Cut-out switch 10: Support insulator
20: upper terminal 21: upper connection terminal
23: upper support part 25: upper contact metal fitting
27: coil spring 30: lower terminal
31: lower connection terminal 33: lower end supporting portion
40: upper contact portion 50: flipper
70: Support insulator fixing part 100: Fuse holder part
110: fuse 130: holder housing
150: supporting line 160: supporting line connecting portion
200: moving joint part 210: lower terminal bracket
230: Fuse holder bracket 240: Fixing groove
250: bracket fixing part 300: fixing prevention part
310: gap holding part 330:

Claims

A fuse holder portion provided at an upper terminal and a lower terminal of the support insulator and having a fuse;
A moving joint part movably coupling the fuse holder part to the lower terminal; And
A fixing preventing portion for preventing the moving joint from being fixed;
And a cut-out switch connected to the cut-out switch.

The method according to claim 1,
Wherein,
A lower terminal bracket coupled to the lower terminal; And
A fuse holder bracket coupled to the fuse holder portion and movably coupling the fuse holder portion to the lower terminal bracket;
And a cut-out switch connected to the cut-out switch.

3. The method of claim 2,
The anti-
Wherein the lower terminal bracket is located between the lower terminal bracket and the fuse holder bracket to prevent the lower terminal bracket from being fixed to the fuse holder bracket.

The method of claim 3,
The anti-
A gap holding part which is positioned between the lower terminal bracket and the fuse holder bracket and holds a gap between the lower terminal bracket and the fuse holder bracket;
And a cut-out switch connected to the cut-out switch.

5. The method of claim 4,
The anti-
An engaging portion located at both sides of the gap holding portion and coupling both sides of the gap holding portion to the lower terminal bracket and the fuse holder bracket;
Further comprising a cut-out switch.

6. The method of claim 5,
The anti-
Wherein the cut-out switch is provided on both sides of the lower terminal bracket.

The method according to claim 6,
The anti-
Wherein the cut-out switch is a torsion spring.

8. The method according to any one of claims 1 to 7,
Wherein the moving joint part rotatably couples the fuse holder part to the lower terminal.