WO2022181985A1

WO2022181985A1 - Load break switch

Info

Publication number: WO2022181985A1
Application number: PCT/KR2022/000837
Authority: WO
Inventors: 김영문
Original assignee: 엘에스일렉트릭 (주)
Priority date: 2021-02-26
Filing date: 2022-01-17
Publication date: 2022-09-01
Also published as: KR20220122308A

Abstract

The present invention provides a load breaker switch wherein gas in an arc chamber is extinguished while passing through a rotation shaft and a puffer guide. The puffer guide coupled to the outer circumferential surface of the rotation shaft and rotatable together with the rotation shaft comprises: an insertion part formed in a column shape and extending in the radial direction of the rotation shaft; and a barrier part coupled to the insertion part while forming a predetermined angle with the insertion part.

Description

load switchgear

The present invention relates to a load switchgear, and more particularly, to a load switchgear in which a gas inside an arc chamber passes through a rotating shaft and a puffer guide and is extinguished.

A load break switch (LBS) refers to a part that opens and closes the rated current of a circuit to protect the branch, division and power system of the line. Furthermore, when short circuit protection is not required in general power circuits, the load switchgear can be used to block overload currents and ground fault currents instead of circuit breakers.

The load switch includes a fixed terminal part that is energably connected to an external power source and load, and a movable terminal part that can be moved in a direction toward or away from the fixed terminal part.

The movable terminal part may be moved manually or automatically to be in contact with and separated from the fixed terminal part.

When the movable terminal part comes into contact with the fixed terminal part, the switching load is energized with an external power source and load. That is, when the movable terminal part comes into contact with the fixed terminal part, the open/close load supplies power to the load.

Conversely, when the movable terminal part is separated from the fixed terminal part, the load switchgear is disconnected from the external power source and the load, and cuts off the power supply to the load. In the above process, an arc is generated between the movable terminal part and the fixed terminal part.

The arc is generated when a voltage is formed between two electrodes disposed with a gas therebetween, and refers to an electrical discharge made by converting a gas existing between the two electrodes into a energizing medium.

The arc is a high-temperature and high-pressure electron flow, which delays the interruption of current and may cause damage to the load switchgear. Accordingly, there is a need for prompt treatment of arcs generated during the power cut-off process of the load switchgear. This is called arc extinguishing.

A puffer may be formed on the rotating shaft coupled to the movable terminal unit. The puffer forms a flow path of pressure generated as the rotating shaft rotates, and serves to disperse and extinguish the arc.

In the conventional puffer, the rear flow path is not formed narrow enough, and some pressure may be lost through the rear flow path. That is, there is a difficulty in concentrating the pressure of the fluid passing through the rear flow path.

This can adversely affect the arc induction and extension process of the load switchgear. In addition, this can lead to damage to the components of the load switchgear.

Therefore, the development of a load switch capable of more concentrating the fluid passing through the rear flow path of the puffer can be considered.

Korean Patent Publication No. 10-1977053 discloses an arc extinguishing device of a load switchgear. Specifically, an arc extinguishing device of a load switchgear that combines a puffer and an arc chute is disclosed.

However, this type of arc extinguishing device is not provided with a separate member for guiding the arc at the inlet of the puffer. Accordingly, pressure lost through the rear flow path of the puffer may be generated.

Korean Patent Publication No. 10-0549510 discloses a gas insulated load switchgear. Specifically, a gas insulated load switchgear in which an arc chute is installed on a main circuit fixed electrode is disclosed.

However, this type of gas insulated load switchgear does not disclose a separate arc extinguishing device other than an arc chute. That is, there is a limit in sufficiently extinguishing the generated arc.

[Prior art literature]

[Patent Literature]

(Patent Document 1) Korean Patent Publication No. 10-1977053 (2019.05.10.)

(Patent Document 2) Korean Patent Publication No. 10-0549510 (2006.02.08.)

SUMMARY OF THE INVENTION One object of the present invention is to provide a load switch in which gas inside an arc chamber can be extinguished while passing through a rotating shaft and a puffer guide.

Another object of the present invention is to provide a load switch in which the pressure of the arc and fluid passing through the puffer guide can be concentrated.

Another object of the present invention is to provide a load switch in which the arc elongation and cooling effect can be further increased when the arc is extinguished.

Another object of the present invention is to provide a load switch in which the insertion part of the puffer guide can be more easily inserted into the housing part, and at the same time, the insertion part and the housing part can be more firmly coupled.

In order to achieve the above object, a load switch according to an embodiment of the present invention, a fixed terminal unit; movable terminal unit; a rotation shaft rotatable relative to the fixed terminal portion and rotatable together with the movable terminal portion; and a puffer guide having a hollow accommodating the movable terminal part therein, coupled to the outer circumferential surface of the rotating shaft and capable of being rotated together with the rotating shaft, wherein the puffer guide is a radiation of the rotating shaft It is formed in the shape of a column extending in the direction, the insertion portion; and a barrier portion coupled to one surface of the insertion portion, wherein the barrier portion includes: a plurality of barrier side portions formed in a plate shape and extending in a direction away from the one surface of the insertion portion; and a barrier inclined portion positioned between a plurality of the barrier side portions, formed in a plate shape, and coupled to the insertion portion at a predetermined angle.

In addition, a plurality of the barrier inclined portions may be provided, and the different barrier inclined portions may be spaced apart from each other.

In addition, the movable terminal portion, a movable contact that can be in contact with or separated from the fixed terminal portion; and a movable contact point formed in a rod shape extending in a radial direction of the rotation shaft and having the movable contact point formed at one end thereof, wherein the puffer guide accommodates the movable contact point inside, and externally The movable contact may be disposed.

In addition, it includes an arc chute having a plurality of arc grids spaced apart from each other from the fixed terminal, wherein the arc grid includes: a grid base portion formed in a plate shape; and two grid legs extending radially inward of the rotation shaft from one side of the grid base part, wherein the grid legs have a distance between one end of the rotation shaft facing radially inward and the rotation shaft, is formed to be smaller than the distance between the movable contact and the rotation shaft, and a grid concave portion is formed in the space between the two grid legs, the grid concave portion being formed to have a width greater than a width of the movable contact, and to the inside thereof The movable contact is passed through and can be rotated.

In addition, the puffer guide is disposed adjacent to the outer circumferential surface of the rotation shaft, is formed in a column shape extending radially outward of the rotation shaft, and includes a housing portion in which an insertion wedge is protruded from at least one surface, and , An insertion groove is recessed in at least one surface of the insertion part, and the insertion groove is formed in a shape corresponding to the insertion wedge, and the insertion wedge is slid to be coupled thereto.

In addition, at least one portion of the outer peripheral surface of the insertion portion,

An insertion auxiliary part that protrudes in a direction away from the outer circumferential surface and extends toward the rotation shaft may be formed.

In addition, the barrier part includes a barrier coupling part positioned adjacent to the one surface of the insertion part, and an insertion part through hole and a barrier through hole are formed in a portion of the insertion part and the barrier coupling part, respectively, and the insertion part The through-hole and the barrier through-hole may be disposed adjacent to each other, and may be coupled by a bolt coupling method.

In addition, the barrier coupling part may be coupled to one side of the barrier inclined part.

In addition, the barrier coupling part may be coupled to one side of the barrier side part.

In addition, at least one surface of the insertion portion may be provided with a depression formed by cutting toward the rotation shaft.

In addition, at least a portion of the upper end of the inner circumferential surface of the insertion part may be cut at a predetermined angle.

In addition, the load switch according to another embodiment of the present invention, the opening and closing unit including a fixed terminal unit and a movable terminal unit; a rotation shaft rotatable relative to the fixed terminal portion and rotatable together with the movable terminal portion; and a puffer guide having a hollow accommodating the movable terminal part formed therein, coupled to the outer circumferential surface of the rotating shaft and capable of being rotated together with the rotating shaft, wherein the puffer guide extends in a radial direction of the rotating shaft It is formed in a column shape, the insertion portion; and a barrier portion coupled to one surface of the insertion portion, wherein the barrier portion includes: a plurality of barrier side portions formed in a plate shape and extending in a direction away from the one surface of the insertion portion; and a barrier bottom part disposed between the different barrier side parts, connecting one end of the different barrier side parts, and coupled to the insertion part at a predetermined angle.

In addition, it includes an arc chute having a plurality of arc grids spaced apart from each other from the fixed terminal, wherein the arc grid includes: a grid base portion formed in a plate shape; and two grid legs extending radially inwardly of the rotation shaft from one side of the grid base portion, wherein the movable terminal portion includes: a movable contact capable of being in contact with or separated from the fixed terminal portion; and a movable contact point formed in a rod shape extending in a radial direction of the rotation shaft and having the movable contact point formed at one end thereof, wherein the puffer guide accommodates the movable contact point inside, and externally The movable contact is disposed, and the grid leg is formed such that a distance between one end of the rotary shaft facing radially inward and the rotary shaft is smaller than a distance between the movable contact point and the rotary shaft, and the two grid legs A grid concave portion is formed in the space between the grid concave portions, the width of the grid concave portion is formed to be greater than the width of the movable contact, and the movable contact is passed therein and can be rotated.

In addition, at least one portion of the outer circumferential surface of the insertion portion may be formed with an insertion auxiliary portion that protrudes in a direction away from the outer circumferential surface and extends toward the rotation shaft.

The barrier part may include a barrier coupling part positioned adjacent to the one surface of the insertion part and extending from one end of at least one of the barrier side part and the barrier bottom part.

In addition, an insertion part through-hole and a barrier through-hole are formed in a portion of the insertion part and the barrier coupling part, respectively, and the insertion part through-hole and the barrier through-hole are disposed adjacent to each other and coupled by a bolt coupling method. can

Among the various effects of the present invention, effects that can be obtained through the above-described solution are as follows.

First, it is coupled to a puffer guide (puffer guide) including a barrier (barrier) on the rotating shaft. Specifically, the puffer guide is coupled to one side of the rotation shaft. At this time, the inner space of the rotating shaft and the inner space of the puffer guide are in communication.

The puffer guide rotates together with the rotating shaft when the rotating shaft rotates. When the rotating shaft is rotated, this creates a pressure. Accordingly, the arc and gas inside the arc chamber may be momentarily compressed.

The arc and gas pass through the rotating shaft and the puffer guide, and are discharged to the other side opposite to the one side of the rotating shaft. During this process, the arc and gas pass through the puffer guide at high speed.

Accordingly, during the rotational operation of the rotating shaft, the arc may pass through the puffer guide and be extinguished (extinguishing).

In addition, the arc and gas flowing into the rear of the puffer guide collide with the barrier and then flow into the inner space of the puffer guide. At this time, the arc and gas flowing into the rear of the puffer guide have a narrower flow path.

Accordingly, the pressure of the arc and gas passing through the rear surface of the puffer guide can be more concentrated. Accordingly, the dispersion effect of the arc can be maximized. Furthermore, the performance of arc extinguishing can be further improved.

Further, when the movable terminal portion is rotated, the movable contact may pass through the grid concave portion. In this case, the grid concave portion means a space formed between the grid legs of the arc grid.

Accordingly, the guide path of the arc can be moved more inward with respect to the grid recess. Accordingly, the arc elongation and cooling effect may be further increased. As a result, the arc extinguishing efficiency of the arc chute can be increased.

In addition, the insert part of the puffer guide and the housing part are combined by a slide coupling method. At this time, an insertion wedge corresponding to the insertion groove of the insertion unit is formed in the housing part.

* Therefore, the insertion part of the puffer guide can be more easily inserted into the housing part. At the same time, the insertion portion and the housing portion of the puffer guide may be more firmly coupled to each other.

1 is a perspective view illustrating a load switch according to an embodiment of the present invention.

FIG. 2 is a front sectional view showing the load switch of FIG. 1 .

FIG. 3 is a front view illustrating an opening/closing unit, a rotating shaft, an arc chute, and a puffer guide provided in the load switch of FIG. 1 .

Figure 4 is a side view showing the arc chute and puffer guide of Figure 3;

FIG. 5 is a front view illustrating an opening/closing unit and an arc chute provided in the load switch of FIG. 1 .

6 is a perspective view illustrating an arc chute provided in the load switch of FIG. 1 .

Fig. 7 is a front view showing the arc chute of Fig. 6;

Fig. 8 is a side view showing the arc chute of Fig. 6;

9 is a perspective view illustrating a fastening unit provided in the arc chute of FIG. 6 .

FIG. 10 is a front view illustrating the fastening part of FIG. 9 .

11 is a side view illustrating the fastening part of FIG. 9 .

12 is a conceptual diagram illustrating an arc runner and an arc grid provided in the arc chute of FIG. 6 .

13 is a perspective view illustrating an arc runner provided in the arc chute of FIG. 6 .

14 is a side view illustrating an arc grid provided in the arc chute of FIG. 6 .

15 is a side view illustrating an arc chute according to an embodiment different from FIG. 6 .

16 is a side view illustrating an arc grid provided in the arc chute of FIG. 15 .

17 is a perspective view illustrating the puffer guide of FIG. 3 .

18 is a side view illustrating the puffer guide of FIG. 17 .

19 is a plan view illustrating the puffer guide of FIG. 17 .

FIG. 20 is a perspective view illustrating the housing part of FIG. 17 ;

FIG. 21 is a side view illustrating the housing part of FIG. 20 .

22 is a plan view illustrating the housing part of FIG. 20 .

FIG. 23 is a perspective view illustrating the insertion part of FIG. 17 ;

Fig. 24 is a side view showing the insert of Fig. 23;

FIG. 25 is a plan view showing the insertion part of FIG. 23 .

FIG. 26 is a perspective view showing the barrier part of FIG. 17 .

Fig. 27 is a side view showing the barrier portion of Fig. 26;

Fig. 28 is a plan view showing the barrier portion of Fig. 26;

29 is a side view illustrating an arc chute and a puffer guide according to another embodiment of the present invention.

Fig. 30 is a perspective view showing the arc chute of Fig. 29;

Fig. 31 is a side view showing the arc chute of Fig. 29;

32 is a side view illustrating an arc grid provided in the arc chute of FIG. 29 .

33 is a perspective view showing an insertion part of the puffer guide according to another embodiment of the present invention.

Fig. 34 is a side view showing the insertion part of Fig. 33;

Fig. 35 is a plan view showing the insertion portion of Fig. 33;

36 is a perspective view illustrating a barrier part of a puffer guide according to another embodiment of the present invention.

Fig. 37 is a side view showing the barrier portion of Fig. 36;

Fig. 38 is a plan view showing the barrier portion of Fig. 36;

39 is a conceptual diagram illustrating (a) before arc generation and (b) after arc generation of the opening/closing unit and the puffer guide according to an embodiment of the present invention.

Hereinafter, the load switch 1 according to an embodiment of the present invention will be described in more detail with reference to the drawings.

In the following description, in order to clarify the characteristics of the present invention, descriptions of some components may be omitted.

In the present specification, the same reference numerals are assigned to the same components even in different embodiments, and overlapping descriptions thereof will be omitted.

The accompanying drawings are only for making it easy to understand the embodiments disclosed in the present specification, and the technical ideas disclosed in the present specification are not limited by the accompanying drawings.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

* The terms "upper side", "lower side", left", "right", "front side" and "rear side" used in the following description are used in FIGS. 1, 6, 13, 17, 30, 33 and the coordinate system shown in FIG. 36 .

1. Description of the load switch 1 according to the embodiment of the present invention

Hereinafter, the load switch 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 28 . However, the rotation direction of each component will be understood with reference to FIGS. 2, 3 and 5 .

The load switch 1 may open and close the rated current of the converter. That is, the load switch 1 may allow or block an energized state between an external power source and a load. To this end, the load switch 1 is electrically connected to an external power source and a load. In other words, the external power source and the load are connected to be energized by the load switch 1 .

When the fixed

contacts

321b and 322b and the movable contact 332 of the load switch 1 are in contact with each other, an external power source and a load may be electrically connected through the load switch 1 . Conversely, when the fixed

contacts

321b and 322b and the movable contact 332 of the load switch 1 are spaced apart from each other, the energization state between the external power source and the load is cut off.

Whether the load switch 1 is opened or closed may be manually or automatically operated. To this end, a separate manipulation unit may be coupled to the load switch 1 .

Hereinafter, the configuration of the load switch 1 according to an embodiment of the present invention will be described with reference to the accompanying drawings, but the frame part 10, the fixing part 20, the opening and closing part 30, the rotating shaft 40, Arc chute 50 and puffer guides 60 and 70 are described in separate sections.

(1) Description of the configuration of the load switch (1)

The load switch 1 is connected to an external power source and a load to be energized, respectively, and may allow or block an energization state between the power source and the load. Specifically, in the load switch 1, the fixed terminal part 320 and the movable terminal part 330 are in contact or spaced apart from each other, and allow or block the energized state between the external power source and the load.

In one embodiment, the load switch 1 is coupled with a handle. The user may manually control whether the load switch 1 is opened or closed by manipulating the handle. In the case of the load switch 1 provided in the Ring Main Unit (RMU), the handle may be rotated to operate whether to open or close.

In another embodiment, the operation unit is attached to the load switch 1 . The manipulation unit opens or closes a circuit between an external power source and a load under certain conditions. That is, whether the load switch 1 is opened or closed may be automatically operated by the manipulation unit.

In the illustrated embodiment, the load switch 1 includes a frame part 10 , a fixing part 20 , an opening and closing part 30 , a rotating shaft 40 , an arc chute 50 and puffer guides 60 and 70 . do.

Hereinafter, the configuration of the load switch 1 will be described in more detail with reference to the accompanying drawings.

(2) Description of the frame part 10 and the fixing part 20

Hereinafter, the frame unit 10 will be described with reference to FIGS. 1 and 2 .

The frame part 10 forms the exterior of the load switch 1 .

The frame portion 10 is formed in a cylindrical shape.

The outer periphery of the frame part 10 is formed in a shape corresponding to the arc chute 50 .

A through hole capable of accommodating the fixed terminal unit 320 is formed on the outer periphery of the frame unit 10 . In the illustrated embodiment, the upper and lower outer peripheral surfaces of the frame unit 10 are formed with vertical through-holes capable of accommodating the fixed terminal unit 320 .

The frame part 10 has a space that can accommodate various devices therein. In the space, various devices performing a function for the load switch 1 to apply or block an externally transmitted current may be accommodated. In the illustrated embodiment, the opening and closing part 30, the rotating shaft 40 and the puffer guide 60 are accommodated in the space.

A rotation shaft 40 coupled to the puffer guides 60 and 70 is coupled through the frame portion 10 . In the illustrated embodiment, the rotation shaft 40 is coupled through the central portion of the frame portion 10 in the front-rear direction. Specifically, the rotation shaft 40 is positioned on a straight line with the central axis of the frame unit 10 .

The gas inside the frame part 10 may be momentarily compressed by the pressure generated when the rotating shaft 40 rotates. The gas passes through the puffer guides 60 and 70 and moves in the opposite direction. In the above process, the gas may pass through the puffer guides 60 and 70 at high speed. As a result, the arc generated in the opening and closing process can be extinguished through the above process.

The fixing part 20 and the arc chute 50 are fixed and coupled to the outside of the frame part 10 . In the illustrated embodiment, the fixing part 20 is coupled to the rear side of the frame part 10 , and the arc chute 50 is coupled to the outer periphery of the frame part 10 .

In an embodiment, the frame part 10 may be formed of an insulating material. For example, the frame part 10 may be formed of a synthetic resin material. Accordingly, it can be prevented that the inside and outside of the frame portion 10 are arbitrarily energized. That is, it can be prevented that the arc, which is a flow of electrons, is arbitrarily leaked to the outside of the frame unit 10 .

In another embodiment, the frame unit 10 may be formed of a material having high pressure resistance and high heat resistance. Accordingly, it is possible to prevent the frame portion 10 from being damaged by the arc, which is a high-temperature and high-pressure electron flow.

In the illustrated embodiment, the frame part 10 includes an upper frame 110 and a lower frame 120 .

The upper frame 110 forms the upper exterior of the load switch 1 .

The upper frame 110 is formed in a semi-cylindrical shape. Specifically, the upper frame 110 has a semi-cylindrical shape in which the curved portion faces upward. At this time, the outer periphery of the upper frame 110 is formed in a shape corresponding to the arc chute (50).

The arc chute 50 is closely coupled to the outer peripheral surface of the upper frame 110 . To this end, an upper fastening wing portion (not shown) may be formed on the outer periphery of the upper frame 110 . That is, the upper fastening wing portion is closely coupled to the arc chute 50 .

The upper fastening wing portion is disposed adjacent to the arc chute 50 and is inserted and coupled to the arc chute 50 . In one embodiment, the upper fastening wing portion may be formed in a shape corresponding to the fastening groove 511 of the arc chute 50 to be described later.

An upper fastening wing hole (not shown) is formed in the upper fastening wing portion. The upper fastening wing hole functions as a passage for the engaging member 520 of the arc chute 50 . The coupling member 520 of the arc chute 50 passes through the upper fastening wing hole and is coupled to the upper fastening wing portion. That is, the coupling member 520 of the arc chute 50 is through-coupled to the upper fastening wing hole. In one embodiment, the coupling may be a bolt coupling method.

In addition, an upper fixed terminal accommodating part 112 capable of accommodating the fixed terminal part 320 is protruded from the outer periphery of the upper frame 110 part 10 .

The upper fixed terminal accommodating part 112 accommodates the fixed terminal part 320 so that the fixed terminal part 320 communicates with the outer and inner spaces of the frame part 10 .

A space for accommodating the fixed terminal unit 320 is formed inside the upper fixed terminal accommodating part 112 . Specifically, the fixed

contact bars

321a and 322a are accommodated in the space. That is, the fixed

contact bars

321a and 322a are coupled through the upper fixed single yarn receiving portion.

The upper fixed terminal accommodating part 112 is formed in the shape of a column with a hollow formed therein. In the illustrated embodiment, the upper fixed terminal receiving part 112 extends upwardly from the upper outer peripheral surface of the upper frame 110 .

The upper fixed terminal receiving part 112 is disposed to surround the fixed terminal part 320 . That is, the fixed terminal unit 320 is surrounded by the upper fixed terminal receiving unit 112 .

A plurality of upper fixed terminal accommodating parts 112 may be provided. The number of the upper fixed terminal receiving portions 112 is the same as the number of the fixed terminal portions 320 coupled to the upper frame 110 . In the illustrated embodiment, three pairs of upper fixed terminal accommodating portions 112 are arranged side by side in the front-rear direction.

The number of the upper fixed terminal accommodating part 112 may be determined according to the type of power system in which the load switch 1 of the present invention is provided. In an embodiment, the load switch 1 is provided in a power system using a three-phase circuit of R-phase, S-phase and T-phase. Accordingly, three pairs of the upper fixed terminal accommodating part 112 are also provided in accordance with the three-phase circuit.

The lower frame 120 is coupled to the lower side of the upper frame 110 .

The lower frame 120 forms the lower exterior of the load switch 1 .

The lower frame 120 is disposed adjacent to the upper frame 110 . In addition, the lower frame 120 is disposed below the upper frame 110 .

The lower frame 120 is symmetrical with the upper frame 110 with respect to the rotation shaft 40 . In the illustrated embodiment, the upper frame 110 and the lower frame 120 are disposed to be vertically symmetrical with respect to the rotation shaft 40 .

The lower frame 120 is formed in a semi-cylindrical shape. Specifically, the lower frame 120 has a semi-cylindrical shape in which the curved portion faces downward. At this time, the outer periphery of the lower frame 120 is formed in a shape corresponding to the arc chute (50).

The upper end of the lower frame 120 is in contact with the lower end of the upper frame 110 . In addition, the upper end of the lower frame 120 is formed in a shape corresponding to the lower end of the upper frame (110).

The arc chute 50 is closely coupled to the outer peripheral surface of the lower frame 120 . To this end, a lower fastening wing portion (not shown) may be formed on the outer periphery of the lower frame 120 . That is, the lower fastening wing portion is closely coupled to the arc chute 50 .

A lower fastening wing hole (not shown) is formed in the lower fastening wing portion.

In addition, a lower fixed terminal accommodating portion 122 capable of accommodating the fixed terminal portion 320 is protruded from the outer periphery of the lower frame 120 . In the illustrated embodiment, the lower fixed terminal receiving part 122 extends downward from the lower outer peripheral surface of the lower frame 120 .

The function and structure of the lower fixed terminal accommodating part 122 corresponds to the upper fixed terminal accommodating part 112 of the upper frame 110 . Accordingly, a redundant description thereof will be omitted.

The fixing part 20 securely installs the frame part 10 to the main body of the ring main unit, a switchboard, and the like.

The fixing part 20 is disposed adjacent to the frame part 10 . In the illustrated embodiment, the fixing part 20 is disposed on the rear side of the frame part 10 .

The fixing part 20 is disposed between the frame part 10 and a specific member (not shown) on which the load switch 1 is installed, and is coupled to the frame part 10 and the specific member, respectively. That is, the frame part 10 and the specific member may be coupled by the fixing part 20 .

Accordingly, the load switch 1 may be operated while the frame portion 10 is coupled to the specific member without being separated from the specific member.

The fixing part 20 may be formed of a material of high rigidity. For example, the fixing part 20 may be formed of a metal material. Accordingly, damage to the fixing part 20 and separation of the frame part 10 due to external impact can be prevented.

In the illustrated embodiment, the fixing unit 20 includes a fixing plate 210 and a support 220 .

The fixing plate 210 is a member to which the fixing part 20 is directly coupled to the specific member.

The fixing plate 210 is formed on one side of the fixing part 20 opposite to the frame part 10 . In the illustrated embodiment, the fixing plate 210 is formed on the rear side of the fixing portion (20).

The fixing plate 210 is formed in a plate shape. In an embodiment, a through hole may be formed in the center of the fixing plate 210 . Accordingly, the fixing plate can be more lightweight.

In the illustrated embodiment, the fixing plate 210 is formed in a rectangular plate shape with a through hole formed in the center. In the above embodiment, the center point of the fixing plate 210 is located on an extension line of the frame portion 10 center line.

A fixing hole 211 may be formed through the fixing plate 210 .

In an embodiment, a member coupling the specific member and the fixing plate 210 may be through-coupled to the fixing hole 211 . In this case, it is preferable that a through hole communicating with the fixing hole 211 is formed in the specific member.

A support 220 is disposed between the fixing plate 210 and the frame portion 10 .

The support 220 is disposed between the fixing plate 210 and the frame part 10 , and is coupled to the fixing plate and the frame part 10 , respectively. That is, the fixing plate and the frame portion 10 may be coupled through the support 220 . Accordingly, the frame portion 10 may be spaced apart from the fixing plate 210 .

The support 220 is coupled to one surface of the fixing plate 210 facing the frame portion (10). In addition, the support 220 is coupled to one side of the frame portion 10 facing the support (220). The coupling may be a bolt coupling method.

The support 220 extends in a direction toward the frame portion 10 and the fixing plate 210 . In the illustrated embodiment, the support 220 extends in the front-rear direction.

In an embodiment, a plurality of supports 220 may be provided. In the above embodiment, the plurality of supports 220 are arranged such that the center point is the same as the center point of the fixing plate (210).

(3) Description of the opening/closing part 30

Hereinafter, the opening/closing unit 30 will be described with reference to FIGS. 2 to 5 .

The opening/closing unit 30 is accommodated in the inner space of the frame unit 10 to allow or block current flow. Specifically, the opening/closing unit 30 has the fixed

contacts

321b and 322b and the movable contact 332 in contact to allow the conduction of current, or the fixed

contacts

321b and 322b and the movable contact 332 are spaced apart to conduct the current. to block

A plurality of opening/closing units 30 may be provided. In the illustrated embodiment, the three opening and closing parts 30 are arranged side by side in the front-rear direction.

The number of the opening and closing parts 30 may be determined according to the type of the power system in which the load switch 1 of the present invention is provided. When the load switch 1 is provided in a power system using a three-phase circuit of R-phase, S-phase and T-phase, three switchgear 30 may also be provided according to the three-phase circuit.

In the illustrated embodiment, the opening/closing unit 30 includes an arc chamber 310 , a fixed terminal unit 320 , and a movable terminal unit 330 .

The arc chamber 310 may also be referred to as an “arc extinguishing unit”. The arc chamber 310 extinguishes the arc generated when the fixed

contacts

321b and 322b and the movable contact 332 are spaced apart. Specifically, the arc chamber 310 forms a space capable of extinguishing the arc therein.

The gas inside the space may be momentarily compressed by the pressure generated during the movement of the movable terminal unit 330 . At this time, the gas may flow in a direction opposite to the rotation direction while passing through the puffer guides 60 and 70 . In the above process, the gas flows through the puffer guides 60 and 70 at high speed, and an arc extinguishing operation may be performed.

The arc chamber 310 airtightly accommodates the fixed terminal part 320 and the movable terminal part 330 . That is, the fixed terminal part 320 and the movable terminal part 330 are accommodated in the arc chamber 310 . Accordingly, the arc generated by the fixed

contacts

321b and 322b and the movable contact 332 being spaced apart from each other is not arbitrarily discharged to the outside of the arc chamber 310 .

The fixed terminal unit 320 is electrically connected to an external power source or load. Through the fixed terminal unit 320 , the load switch 1 may be connected to an external power source or a load to be energized.

A part of the fixed terminal part 320 is accommodated in the arc chamber 310 .

The fixed terminal unit 320 may be formed of a conductive material. For example, the fixed terminal unit 320 may be formed of copper (Cu), silver (Ag), or the like.

In addition, a portion of the fixed terminal unit 320 is accommodated in the inner space of the frame unit 10 , so that electricity inside and outside the load switch 1 may be applied or blocked. Specifically, the fixed terminal unit 320 may be in contact with or spaced apart from the movable terminal unit 330 , thereby applying or blocking current to the inside and the outside of the load switch 1 .

The fixed terminal unit 320 is coupled through the fixed

terminal receiving units

112 and 122 of the frame unit 10 . The fixed terminal part 320 is surrounded by the fixed terminal

accommodating parts

112 and 122 and seals the fixed terminal

accommodating parts

112 and 122 . That is, the movement of the material through the fixed terminal

accommodating portions

112 and 122 is blocked by the fixed terminal portion 320 .

The fixed terminal part 320 does not move in the inner space of the frame part 10 . Accordingly, contact and separation between the fixed terminal part 320 and the movable terminal part 330 is achieved by the movement of the movable terminal part 330 .

The rest of the fixed terminal part 320 except for the one part is exposed to the outside of the frame part 10 . The remaining portion may be electrically connected to an external power source or load by a conducting wire member (not shown).

A plurality of fixed terminal units 320 may be provided. The number of fixed terminal units 320 is the same as the number of fixed

terminal receiving units

112 and 122 provided in the frame unit 10 .

In the illustrated embodiment, four fixed terminal units 320 are formed in one group, and three groups of fixed terminal units 320 are arranged side by side in the front-rear direction. In the above embodiment, the two fixed terminal parts 320 facing each other with the rotation shaft 40 interposed therebetween are arranged so as to be point-symmetrical with respect to the central axis of the rotation shaft 40 .

The two fixed terminal units 320 facing each other with the rotation shaft 40 interposed therebetween may be connected to each other so as to be energized. The connection is formed by contacting the movable terminal part 330 with the two fixed terminal parts 320 , respectively.

In the illustrated embodiment, the fixed terminal unit 320 includes a first fixed terminal unit 321 and a second fixed terminal unit 322 .

The first fixed terminal part 321 is electrically connected to an external power source and a load, or is electrically connected to a ground line. The second fixed terminal part 322 is electrically connected to a ground line or electrically connected to an external power source and a load.

The movable terminal part 330 is moved and may be in contact with or spaced apart from the first fixed terminal part 321 or the second fixed terminal part 322 . However, the movable terminal part 330 cannot contact the first fixed terminal part 321 and the second fixed terminal part 322 at the same time, but only in contact with any one of the first fixed terminal part 321 and the second fixed terminal part 322 . can be

Specifically, the movable terminal unit 330 may be rotated in a direction toward the fixed terminal unit 320 or in a direction away from the fixed terminal unit 320 .

When the movable terminal part 330 is rotated in a direction away from the fixed terminal part 320, the movable terminal part 330 and the fixed terminal part 320 are separated from each other, and an arc is formed between the movable terminal part 330 and the fixed terminal part 320. occurs

In an embodiment, the first fixed terminal part 321 may be electrically connected to an external power source and a load, and the second fixed terminal part 322 may be electrically connected to a ground line.

In the above embodiment, when the movable terminal part 330 is in contact with the first fixed terminal part 321, electricity may be applied between the external power source and the load. In addition, when the movable terminal part 330 is in contact with the second fixed terminal part 322 , the movable terminal part 330 is energably connected to the ground line, and conduction between the external power source and the load is cut off.

When the movable terminal part 330 is spaced apart from both the first fixed terminal part 321 and the second fixed terminal part 322 , the current outside the load switch 1 is not transmitted to the inside of the load switch 1 .

In the illustrated embodiment, the first fixed terminal unit 321 includes a first fixed contact bar 321a and a first fixed contact 321b.

The first fixed contact point 321a is electrically connected to an external power source or load.

A portion of the first fixed contact point 321a is accommodated in the inner space of the frame portion 10 , and the remaining portion is exposed to the outside of the frame portion 10 . Specifically, a portion of the first fixed contact bar 321a is surrounded by the fixed terminal

accommodating portions

112 and 122 .

A plurality of first fixed contact bars 321a may be provided. In the illustrated embodiment, six first fixed contact points 321a are provided on the upper side of the frame part 10 and six on the lower side, a total of twelve.

In an embodiment, the first fixed contact bar 321a may have a cylindrical shape that is bent and extended in a direction toward the rotation shaft 40 .

A first fixed contact point 321b is formed at one end of the first fixed contact point 321a facing the rotation shaft 40 .

The first fixed contact 321b is disposed adjacent to the first fixed contact stand 321a. In addition, the first fixed contact 321b is electrically connected to the first fixed contact stand 321a.

The first fixed contact 321b may be in contact with or spaced apart from the movable contact 332 . Accordingly, the load switch 1 may be energized or cut off with an external power source or load.

In an embodiment, the first fixed contact 321b may be integrally formed with the first fixed contact stand 321a.

The second fixed terminal part 322 is disposed to be spaced apart from the first fixed terminal part 321 .

The second fixed terminal unit 322 is electrically connected to a member that is not connected to the first fixed terminal unit 321 among external power, load, and ground lines.

That is, when the first fixed terminal part 321 is electrically connected to an external power source and a load, the second fixed terminal part 322 is electrically connected to the ground line.

In the illustrated embodiment, the second fixed terminal unit 322 includes a second fixed contact bar 322a and a second fixed contact 322b.

The second fixed contact bar 322a and the second fixed contact point 322b have functions and structures corresponding to the first fixed contact bar 321a and the first fixed contact point 321b. Accordingly, a redundant description thereof will be omitted.

The movable terminal part 330 is connected to or separated from the fixed terminal part 320 so as to be energized. Through the movable terminal part 330 , the plurality of fixed terminal parts 320 may be electrically connected to each other. As a result, the load switch 1 may be electrically connected to an external power source or load.

The movable terminal unit 330 is accommodated in the inner space of the frame unit 10 . The movable terminal part 330 is rotatably coupled to the inner space of the frame part 10 .

The movable terminal part 330 is coupled to the rotation shaft 40 . When the rotation shaft 40 is rotated, the movable terminal part 330 may also be rotated together with the rotation shaft 40 .

In addition, a part of the movable terminal part 330 is accommodated in the puffer guides 60 and 70 .

A plurality of movable terminal units 330 may be provided. In the illustrated embodiment, the load switch 1 is provided with three pairs of movable terminal units 330 . The three pairs of movable terminal units 330 are arranged side by side in the front-rear direction.

The plurality of movable terminal portions 330 may be in contact with or spaced apart from the plurality of fixed terminal portions 320 to be electrically energized, respectively. That is, the movable terminal unit 330 may be rotated to contact the fixed terminal unit 320 , or rotated to be spaced apart from the fixed terminal unit 320 . The contact and separation may be achieved according to the rotation of the rotating shaft 40 connected to the movable terminal unit 330 .

When the movable terminal unit 330 is in contact with the fixed terminal unit 320 connected to an external power source and a load, electricity may be applied between the external power source and the load.

In addition, when the movable terminal unit 330 is in contact with the fixed terminal unit 320 connected to the ground line, the movable terminal unit 330 is connected to the ground line so as to be energized, and conduction between the external power source and the load is cut off.

The movable terminal unit 330 may be formed of a conductive material. For example, the movable terminal unit 330 may be formed of copper, silver, or the like.

In the illustrated embodiment, the movable terminal unit 330 includes a movable contact bar 331 and a movable contact 332 .

The movable contact point 331 is directly coupled to the rotation shaft 40 and rotates together with the rotation shaft 40 . The movable contact point 331 may be rotated clockwise or counterclockwise by the rotation shaft 40 .

In one embodiment, the movable contact point 331 is disposed such that its center point is the same as the center point of the rotation shaft 40 .

The movable contact bar 331 is formed in a bar shape extending in a predetermined direction. The predetermined direction may be a radial direction of the rotation shaft 40 . In an embodiment, the movable terminal part 330 is bent and extended toward the fixed terminal part 320 .

In the illustrated embodiment, both ends of the movable contact point 331 in the radial direction of the rotation shaft 40 are separated into two parts. A movable contact 332 is formed at each end.

The movable contact 332 is electrically connected to the movable contact stand 331 .

The movable contact 332 is in contact with or spaced apart from the fixed

contacts

321b and 322b. Accordingly, the load switch 1 may be energized or cut off with an external power source or load.

The movable contact 332 is located at both ends of the movable contact stand 331 . That is, the movable contact 332 is positioned radially outward with respect to the rotation shaft 40 .

In an embodiment, the movable contact 332 is disposed to be surrounded by the puffer guides 60 and 70 . In another embodiment, the movable contact 332 is disposed radially outside the puffer guides 60 , 70 with respect to the rotating shaft 40 . That is, in the above embodiment, the movable contact 332 is not surrounded by the puffer guides 60 and 70 , but is exposed to the outside of the puffer guides 60 and 70 .

A plurality of movable contacts 332 may be provided. In the illustrated embodiment, two movable contacts 332 are respectively located at both ends of the movable contact bar 331 . That is, the movable contact point 331 is provided with a total of four movable contact points 332 .

The movable contact 332 rotates together with the rotation shaft 40 when the rotation shaft 40 rotates. The movable contact 332 is accommodated in the inner space of the frame portion 10 so as to be rotatable with respect to the axis of rotation of the rotation shaft 40 .

In one embodiment, the movable contact 332 may be integrally formed with the movable contact stand 331 .

(4) Description of the rotating shaft 40

Hereinafter, the rotation shaft 40 will be described with reference to FIGS. 2 and 3 .

The rotation shaft 40 is connected to the movable terminal part 330 and rotates together with the movable terminal part 330 . By rotation of the rotation shaft 40 , the movable terminal part 330 may be in contact with or spaced apart from the fixed terminal part 320 .

The rotating shaft 40 is rotatably coupled to the frame portion 10 . Specifically, the rotation shaft 40 is rotatably accommodated in the inner space of the frame unit 10 .

The rotation shaft 40 is connected to the movable terminal part 330 . In the illustrated embodiment, the plurality of movable terminal units 330 are coupled through the rotation shaft 40 .

In addition, the rotating shaft 40 is electrically connected to the movable terminal part 330 . Accordingly, the current flowing into the load switch 1 through the fixed terminal unit 320 may proceed toward the other fixed terminal unit 320 through the movable terminal unit 330 and the rotating shaft 40 .

Puffer guides 60 and 70 are coupled to one side of the rotation shaft 40 . In an embodiment, the inner space of the puffer guides 60 and 70 and the inner space of the rotation shaft 40 are in communication with each other.

In addition, the rotation shaft 40 may be connected to a handle (not shown) or a manipulation unit (not shown). The rotation of the rotating shaft 40 may be manually operated by a handle or may be automatically operated by a manipulation unit.

In the illustrated embodiment, the rotating shaft 40 is rotated clockwise or counterclockwise with respect to the central axis.

The rotating shaft 40 rotates and rotates the movable terminal part 330 . That is, the movable terminal unit 330 may be rotated by the rotation shaft 40 in a direction toward the fixed terminal unit 320 or in a direction away from the fixed terminal unit 320 .

The rotation shaft 40 is formed in a cylindrical shape. In one embodiment, the center point of the rotation shaft 40 is positioned to be the same as the center point of the movable terminal unit 330 .

A plurality of rotation shafts 40 may be provided. The number of rotation shafts 40 is the same as the number of movable terminal parts 330 . In the illustrated embodiment, three rotation shafts 40 are arranged side by side in the front-rear direction.

The number of rotating shafts 40 may be determined according to the type of power system in which the load switch 1 of the present invention is provided. When the load switch 1 is provided in a power system using a three-phase circuit of R-phase, S-phase and T-phase, three rotating shafts 40 may also be provided in accordance with the three-phase circuit.

In the illustrated embodiment, the rotation shaft 40 includes a pillar portion 410 and an uneven portion 420 .

The pillar part 410 forms the exterior of the rotation shaft 40 .

The movable terminal part 330 is coupled through the pillar part 410 and rotates together with the movable terminal part 330 .

The pillar portion 410 is disposed between the two opposing puffer guides 60 and 70, and is coupled to the two puffer guides 60 and 70, respectively.

The column part 410 is formed in a cylindrical shape. In the illustrated embodiment, a hollow is formed in the center of the pillar portion 410 .

Concave-convex portions 420 are formed at both ends of the pillar portion 410 .

The concave-convex portion 420 more firmly couples the two adjacent rotation shafts 40 .

One of the concavo-convex portions 420 of the two adjacent rotation shafts 40 is disposed adjacent to the concave-convex portion 420 of the other rotating shaft 40 .

The concavo-convex portions 420 of the two rotation shafts 40 are formed in shapes corresponding to each other. Accordingly, the concavo-convex portions 420 of the two rotation shafts 40 may be engaged and coupled to each other. Accordingly, when one rotation shaft 40 is rotated, the other rotation shaft 40 may also be rotated together.

2. Description of the arc chute 50 and the puffer guide 60 according to an embodiment of the present invention

Hereinafter, the arc chute 50 and the puffer guide 60 according to an embodiment of the present invention will be described with reference to FIGS. 3 to 28 .

The arc chute 50 extends the length of the arc generated during the opening and closing of the current, and cools and extinguishes the arc.

The arc chute 50 is disposed adjacent to the outer periphery of the frame portion (10). Specifically, the arc chute 50 is in close contact with the outer periphery of the frame portion (10).

The arc chute 50 is coupled to the frame portion 10 . At this time, the arc chute 50 is coupled to the fastening wing portion (not shown) of the frame portion 10 . Specifically, the fastening wing is inserted into the fastening groove 511 of the arc chute 50 .

In addition, a portion of the arc chute 50 is inserted and coupled to the inner space of the frame portion 10 and the arc chamber 310 .

The arc chute 50 is formed in a curved shape. Therefore, it can be easily installed in the rotary load switch (1).

In addition, the arc chute 50 is formed to extend along the circumferential direction of the frame portion (10).

In one embodiment, the arc chute 50 may be formed in a shape corresponding to the outer periphery of the frame portion (10). In another embodiment, the radius of curvature of the arc chute 50 may be the same as the radius of curvature of the frame unit 10 . Accordingly, the arc chute 50 may be in close contact with the outer circumferential surface of the frame portion 10 .

A plurality of arc chute 50 may be provided. In the illustrated embodiment, the two arc chutes 50 are formed as a pair. This is to respond to an arc generated when the movable terminal 330 in contact with the two fixed

contacts

321b and 322b is simultaneously separated from the two fixed

contacts

321b and 322b.

In the above embodiment, the two arc chutes 50 facing each other with the rotating shaft 40 therebetween are arranged so as to be point-symmetrical with respect to the central axis of the rotating shaft 40 . Accordingly, the arc extinguishing ability of the arc chute 50 can be maximized.

The arc chute 50 is not limited to the illustrated shape, and may be formed in various ways. In one embodiment, the arc chute 50 may be provided in three pairs. In the above embodiment, the three pairs of arc chute 50 may be arranged side by side in the front-rear direction.

It will be understood that the direction of the coordinate system used in the description of the arc chute 50 may be changed according to the installation position of the arc chute 50 .

In the illustrated embodiment, the arc chute 50 includes a fastening part 510 , a coupling member 520 , a cover part 530 , an arc runner 540 and an arc grid 550 . do.

The fastening part 510 is a member to which the arc chute 50 is directly coupled to the frame part 10 .

The fastening part 510 is disposed adjacent to the outer periphery of the frame part 10 . In addition, the fastening part 510 is coupled to the fastening wing part (not shown) of the frame part 10 .

The fastening part 510 overlaps the fastening wing part in a predetermined direction. In this case, the predetermined direction is the axial direction of the frame part 10 .

The fastening part 510 is disposed between the plurality of cover parts. In the illustrated embodiment, the fastening part is disposed between the two cover parts 530 and is coupled to each of the cover parts 530 . In the above embodiment, the fastening portion 510 is disposed such that its front side and rear side are covered by the cover portion 530 .

A plurality of fastening units 510 may be provided. The number of fastening parts 510 is the same as the number of fastening wing parts of the frame part 10 . In the illustrated embodiment, the arc chute 50 is provided with two fastening parts 510 . In the above embodiment, an arc runner 540 and an arc grid 550 are disposed between the two fastening parts 510 .

In one embodiment, the fastening part 510 may be provided with a fastening hole 512 communicating with the through hole of the cover part 530 . The fastening hole 512 is formed through the frame portion 10 in the axial direction.

In the illustrated embodiment, a fastening groove 511 is recessed in the fastening part 510 .

The fastening groove 511 is recessed radially outward of the frame part 10 from one surface in contact with the outer circumferential surface of the frame part 10 . In addition, the fastening groove 511 is formed to extend in the radial direction of the frame portion (10).

In one embodiment, the fastening groove 511 is formed in a shape corresponding to the fastening wing portion. This assists in more robust coupling of the fastening groove 511 and the fastening wing portion.

The fastening groove 511 is coupled to the fastening wing of the frame part 10 . Specifically, the fastening wing is inserted into the fastening groove 511 and coupled. To this end, the thickness of the fastening groove 511 may be formed to be greater than the thickness of the fastening wing portion.

The fastening hole 512 is formed to pass through the fastening part 510 in a predetermined direction. In addition, the fastening hole 512 is formed to pass through the fastening groove (511). In one embodiment, the predetermined direction is an axial direction of the frame portion 10 .

The coupling member 520 passes through the fastening portion 510 and the fastening wing portion of the frame portion 10, and makes the coupling of the fastening portion 510 and the fastening wing portion more firmly.

The coupling member 520 is not limited to the illustrated shape and may be formed in various shapes. In one embodiment, the coupling member 520 may be coupled to the arc chute 50 and the frame portion 10 in a bolt coupling manner.

In addition, the coupling member 520 may be formed of a material of high rigidity. For example, the coupling member 520 may be formed of a metal material.

The cover part 530 may be closely coupled to the fastening part 510 , the arc runner 540 , and the arc grid 550 by the coupling member 520 .

The cover part 530 forms the exterior of the arc chute 50 . The cover part 530 supports the fastening part 510 , the arc runner 540 and the arc grid 550 in both directions. In the illustrated embodiment, the cover part 530 supports the fastening part 510 , the arc runner 540 , and the arc grid 550 in the front-rear direction.

The cover part 530 is disposed adjacent to the frame part 10 . Specifically, the cover part 530 is disposed adjacent to the outer periphery of the frame part 10 and the fixed terminal

accommodating parts

112 and 122 .

A plurality of cover parts 530 may be provided. In the illustrated embodiment, the arc chute 50 is provided with two cover parts 530 . In the above embodiment, the two cover parts 530 overlap in the axial direction of the frame part 10 .

A fastening part 510 , an arc runner 540 , and an arc grid 550 are disposed between the two facing cover parts 530 . At this time, the runner coupling protrusion 542 of the arc runner 540 and the grid coupling protrusion 552 of the arc grid 550 are inserted into the cover part 530 .

The cover part 530 is formed to extend in the circumferential direction of the frame part 10 .

The cover part 530 may be formed in a plate shape including a plurality of curves. In an embodiment, the cover part 530 may be formed in a plate shape extending in the circumferential and radial directions of the frame part 10 .

In the illustrated embodiment, the cover portion 530 is formed in a plate shape extending radially outward from a predetermined arc. Accordingly, the cover part 530 may be closely attached to and coupled to the rotary load switch 1 . That is, the cover part 530 may be easily installed in the rotary load switch 1 .

In one embodiment, one side of the cover part 530 in contact with the outer periphery of the frame part 10 may be formed in a shape corresponding to the outer periphery of the frame part 10 . Preferably, one side of the cover part 530 in contact with the outer periphery of the frame part 10 has a radius of curvature equal to the radius of curvature of the frame part 10 . At this time, the center of curvature of the cover part 530 is formed to be the same as the center point of the frame part 10 .

Accordingly, the one side of the cover part 530 may be more firmly attached to the outer periphery of the frame part 10 .

The one side and the other side of the cover part 530 are disposed adjacent to the fixed terminal part 320 . In the illustrated embodiment, the right side of the cover part 530 is disposed adjacent to the fixed terminal part 320 .

In the illustrated embodiment, a cover coupling hole 531 and a cover through hole 532 are formed in the cover part 530 .

The cover coupling hole 531 is disposed adjacent to the fastening part 510 . In an embodiment, the cover coupling hole 531 may communicate with the coupling hole 512 of the coupling part 510 . In addition, the cover coupling hole 531 is spaced apart from the arc runner 540 and the arc grid 550 .

A coupling member 520 is coupled through the cover coupling hole 531 .

A plurality of cover coupling holes 531 may be provided. In an embodiment, the number of cover coupling holes 531 may be the same as the number of coupling members 520 .

The cover through hole 532 is formed at a position spaced apart from the cover coupling hole 531 .

In the cover through hole 532 , the arc runner 540 and the arc grid 550 are inserted. Specifically, the runner coupling protrusion 542 of the arc runner 540 and the grid coupling protrusion 552 of the arc grid 550 are inserted into the cover through hole 532 .

A plurality of cover through holes 532 may be provided. The number of cover through-holes 532 is equal to the sum of the number of runner coupling protrusions 542 and the number of grid coupling protrusions 552 provided in the arc chute 50 .

The plurality of cover through-holes 532 are arranged at regular intervals along a predetermined curve. In an embodiment, the radius of curvature of the predetermined curve may be the same as the radius of curvature of the frame unit 10 .

The cover through hole 532 is formed in a shape corresponding to the runner coupling protrusion 542 and the grid coupling protrusion 552 . In the illustrated embodiment, the cover through-hole 532 is formed to have a rectangular cross-section extending in the front-rear direction.

An arc runner 540 and an arc grid 550 are inserted between the two facing cover parts 530 .

The arc runner 540 may maximize the arc induction effect of the arc chute 50 .

The arc runner 540 is disposed between the fastening part 510 and the arc grid 550 .

The arc runner 540 is disposed between the arc grid 550 and the fixed terminal part 320 . Also, the arc runner 540 is disposed closer to the fixed terminal part 320 as compared to the arc grid 550 . In the illustrated embodiment, the arc runner 540 is disposed to the right of the arc grid 550 .

A portion of the arc runner 540 is in contact with the fixed terminal portion 320 . Accordingly, when an arc is generated, the arc may be guided toward the arc runner 540 . As a result, the arc-inducing effect can be maximized.

Another part of the arc runner 540 is inserted and fixed in the cover part 530 .

In an embodiment, the arc runner 540 may be formed of a conductive material. For example, the arc runner 540 may be formed of a metal material.

In the illustrated embodiment, the arc runner 540 may be divided into a runner base portion 541 , a runner coupling protrusion 542 , and a runner leg 543 .

The runner base portion 541 forms the body portion of the arc runner 540 .

The runner base part 541 is disposed closer to the fixed terminal part 320 as compared to the grid base part 551 of the arc grid 550 . In the illustrated embodiment, the runner base portion 541 is disposed to the right of the grid base portion 551 .

The runner base portion 541 is formed in a plate shape. In one embodiment, the runner base portion 541 is formed to extend in the width direction. That is, the width of the runner base portion 541 is formed to be longer than the length. In the illustrated embodiment, the width direction is a front-back direction, and the length direction is an up-down direction.

A coupling protrusion is formed on one side of the runner base portion 541 facing the cover portion 530 . In the illustrated embodiment, coupling protrusions are formed on the front side and the rear side of the runner base portion 541 .

The runner coupling protrusion 542 fixes the arc runner 540 to the cover part 530 .

The runner coupling protrusion 542 is inserted into the cover through hole 532 of the cover part 530 .

The runner coupling protrusion 542 extends from one side of the runner base part 541 facing the cover part 530 toward the cover part 530 . In the illustrated embodiment, the runner engaging projection 542 extends from the front side or the rear side of the runner base portion 541 toward the front side or the rear side.

In an embodiment, the runner coupling protrusion 542 may be integrally formed with the runner base portion 541 .

Runner legs 543 form an arc guiding path.

The runner leg 543 is disposed adjacent to the fixed terminal part 320 .

The runner leg 543 extends from the one side and the other side of the runner base portion 541 toward the rotation shaft 40 . Also, the runner legs 543 extend in the longitudinal direction. In the illustrated embodiment, the runner legs 543 extend downwardly from the underside of the runner base portion 541 .

The runner leg 543 extends in a direction toward the fixed terminal part 320 . In addition, the runner leg 543 is bent and extended at a predetermined angle. The bending direction is opposite to the fixed terminal part 320 . In the illustrated embodiment, the bending direction is to the left.

In one embodiment, the runner leg 543 may be integrally formed with the runner base portion 541 and the runner coupling protrusion 542 .

A terminal contact portion 543a is formed at one end of the runner leg 543 .

The terminal contact part 543a is formed at one end of the runner leg 543 opposite to the runner base part 541 based on the bending line of the runner leg 543 . That is, the terminal contact portion 543a is positioned radially inside the frame portion 10 based on the bending line of the runner leg 543 .

In the illustrated embodiment, the terminal contact 543a is formed at the lower end of the runner leg 543 . In the above embodiment, the terminal contact portion 543a is formed below the bent line of the runner leg 543 .

The terminal contact portion 543a is in direct contact with the fixed terminal portion 320 . In one embodiment, the terminal contact portion 543a is in contact with the fixed

contacts

321b and 322b of the fixed terminal portion 320 .

An arc grid 550 is disposed on one side of the arc runner 540 opposite to the fixed terminal part 320 .

The arc grid 550 forms an induction path of the arc generated when the current is opened/closed and blocked.

The arc grid 550 is disposed between the two facing cover parts 530 . A portion of the arc grid 550 is inserted and fixed in the cover through hole 532 of the cover part 530 . That is, the arc grid 550 is disposed adjacent to the cover part 530 .

In addition, the arc grid 550 is disposed to be spaced apart from the fixed terminal unit 320 .

The arc grid 550 extends in a radial direction of the frame portion 10 . Accordingly, the arc grid 550 may be adjacent to the movable terminal unit 330 rotated with respect to the central axis of the frame unit 10 .

A plurality of arc grids 550 may be provided. As the number of arc grids 550 increases, the arc elongation and cooling effect may be further increased.

The plurality of arc grids 550 may be arranged at regular intervals along a predetermined curve. Accordingly, the induction and stretching effect of the arc can be increased.

In an embodiment, the radius of curvature of the predetermined curve may be the same as the radius of curvature of the frame unit 10 . In another embodiment, the predetermined curve may be formed in a shape corresponding to the outer periphery of the frame unit 10 . In the above embodiment, the arc grid 550 is arranged to correspond to one side of the cover part 530 in contact with the frame part 10 .

In the illustrated embodiment, the plurality of arc grids 550 are arranged with a constant radius of curvature with respect to the central point C. The central point (C) is located on the central axis of the frame portion (10) and the rotation shaft (40).

In the illustrated embodiment, in the plurality of arc grids 550 , the length of the arc grid 550 is gradually reduced in a direction away from the fixed terminal part 320 . Accordingly, the insulation distance for the same number of arc grids 550 may be further increased. Furthermore, re-occurrence of the arc due to the excessive recovery voltage can be prevented.

The plurality of arc grids 550 are arranged at predetermined intervals. In an embodiment, the predetermined interval may be 1.4 times or more and 1.6 times or less the thickness of the arc grid 550 . Preferably, the predetermined interval is 1.5 times the thickness of the arc grid 550 .

The arc grid 550 is formed in a plate shape. In the illustrated embodiment, the arc grid 550 is formed to be symmetrical with respect to the front-rear and left-right directions.

6 to 14, the arc chute 50 is provided with a plurality of arc grids 550 of the same shape.

In the embodiment shown in FIG. 15 , the arc chute 50 is provided with arc grids 550 of two different shapes. In the above embodiment, the two arc grids 550 having different shapes are alternately arranged along the predetermined curve.

In an embodiment, the arc grid 550 may be formed of a conductive material. For example, the arc grid 550 may be formed of a metal material.

In the illustrated embodiment, the arc grid 550 may be divided into a grid base portion 551 , a grid coupling protrusion 552 , and a grid leg 553 .

The grid base portion 551 forms the body portion of the arc grid 550 .

The grid base part 551 is disposed on one side of the arc runner 540 opposite to the fixed terminal part 320 . In the illustrated embodiment, the grid base portion 551 is disposed to the left of the runner base portion 541 of the arc runner 540 .

The grid base portion 551 is formed in a plate shape. In one embodiment, the grid base portion 551 is formed to extend in the width direction. That is, the width of the grid base portion 551 is formed to be longer than the length. In the illustrated embodiment, the width direction is a front-back direction, and the length direction is an up-down direction.

An arc hole 551a may be formed through the grid base portion 551 .

The arc hole 551a forms a bypass path of the arc. Accordingly, the arc can be stretched and cooled more efficiently.

A plurality of arc holes 551a may be provided. In the illustrated embodiment, the arc grid 550 is provided with five arc holes 551a.

A grid coupling protrusion 552 is formed on one side of the grid base portion 551 facing the cover portion 530 . In the illustrated embodiment, coupling protrusions are formed on the front side and the rear side of the grid base portion 551 .

The grid coupling protrusion 552 fixes the arc grid 550 to the cover part 530 .

The grid coupling protrusion 552 is inserted into the cover through hole 532 of the cover part 530 .

The grid coupling protrusion 552 extends from one side of the grid base portion 551 toward the cover portion 530 toward the cover portion 530 . In the illustrated embodiment, the grid engaging projection 552 extends from the front side or the rear side of the grid base portion 551 toward the front side or the rear side.

In an embodiment, the grid coupling protrusion 552 may be integrally formed with the grid base portion 551 .

Grid legs 553 form an arc guiding path.

The grid legs 553 extend toward the rotation shaft 40 from the other side and the other side of the grid base portion 551 . Also, the grid legs 553 extend in the longitudinal direction. In the illustrated embodiment, the grid legs 553 extend from the lower side to the lower side of the grid base portion 551 .

The grid leg 553 may be formed in various shapes according to the shape of the movable terminal part 330 , the puffer guide 60 , and the like, and the driving conditions of the load switch 1 .

The grid leg 553 may change the distance between the adjacent grid legs 553 and the length and shape of the grid leg 553 according to the driving condition of the load switch 1 . In an embodiment, the grid legs 553 may be cut and formed according to the driving conditions of the load switch 1 .

The arc grid 550 is provided with two grid legs 553 . In the embodiment shown in FIG. 14 , the grid legs 553 are formed to be symmetrical with respect to the front and rear and left and right directions of the arc grid 550 .

In an embodiment not shown, the center line of the two grid legs 553 provided in the arc grid 550 is spaced apart from the center line of the arc grid 550 . That is, the grid legs 553 are arranged to be biased in a specific direction with respect to the arc grid 550 . In the above embodiment, the specific direction is any one of the front side and the rear side.

The grid legs 553 provided in the plurality of arc grids 550 are arranged so that the grid legs 553 provided in two adjacent arc grids 550 do not overlap each other in the circumferential direction of the frame unit 10 . .

Also, in the above embodiment, the grid legs 553 provided in the two adjacent arc grids 550 are arranged so as not to overlap each other in the left and right directions.

One end of the grid legs 553 provided in the plurality of arc grids 550 toward the rotation shaft 40 is arranged along a predetermined curve. In an embodiment, the radius of curvature of the predetermined curve may be the same as the radius of curvature of the frame unit 10 . In another embodiment, the predetermined curve is formed in a shape corresponding to the outer periphery of the frame portion (10).

In the illustrated embodiment, the predetermined curve is bent in a specific direction. Said specific direction is a radially outward direction of the rotating shaft 40 . Accordingly, under the condition of the same number of arc grids 550 , the insulating distance between the movable contact 332 and the arc grid 550 may be more reliably secured. Furthermore, refiring of the arc can be prevented.

The one side end of the grid leg 553 is arranged at a predetermined interval.

In an embodiment, the grid leg 553 may be integrally formed with the grid base portion 551 and the grid coupling protrusion 552 .

A grid concave portion 553a is formed between two grid legs 553 provided in the arc grid 550 . That is, the grid concave portion 553a means a space between the two grid legs 553 .

The grid recesses 553a form a direct guide path of the arc.

The arc generated between the fixed terminal portion 320 and the movable terminal portion 330 is guided to the grid concave portion 553a and extinguished.

The grid concave portion 553a may be formed in various shapes. The shape of the grid concave portion 553a is determined according to the position and shape of the grid legs 553 .

In the embodiment shown in FIG. 14 , the grid concave portion 553a is formed to be symmetrical with respect to the front-rear and left-right directions of the arc grid 550 .

In an embodiment, the grid concave portion 553a is formed by extending in the thickness direction of the arc grid 550 in a triangular cross-section with a chamfered edge.

In another embodiment, the grid concave portion 553a is formed by extending in the thickness direction of the arc grid 550 in a triangular cross-section in which the width of one side opposite to the grid base portion 551 is extended.

In another embodiment, the grid concave portion 553a is formed so that a cross section of a pentagon with chamfered edges extends in the thickness direction of the arc grid 550 .

In another embodiment, the grid concave portion 553a is formed so that a cross section of a quadrangular chamfered edge extends in the thickness direction of the arc grid 550 .

In another embodiment, the center line (see dotted line) of the grid concave portion 553a is spaced apart from the center line (see dashed-dotted line) of the arc grid 550 . That is, the grid concave portion 553a is disposed to be biased in a specific direction with respect to the arc grid 550 . In the above embodiment, the specific direction is any one of the front side and the rear side.

In the above embodiment, the grid concave portions 553a provided in the plurality of arc grids 550 are arranged such that the grid concave portions 553a provided in two adjacent arc grids 550 do not overlap each other in the left and right directions. do.

The puffer guide 60 may be rotated in a direction toward the arc chute 50 or in a direction away from the arc chute 50 .

The puffer guide 60 narrows the flow path of the gas in which the pressure is increased while the movable terminal part 330 is rotated, thereby dispersing and extinguishing the arc.

The puffer guide 60 is accommodated in the inner space of the frame unit 10 .

The puffer guide 60 is coupled to one side of the rotation shaft 40 . The puffer guide 60 extends radially outward of the rotation shaft 40 from the one side of the rotation shaft 40 . In one embodiment, the puffer guide 60 may be coupled to the rotation shaft 40 by welding.

A plurality of puffer guides 60 may be provided. In one embodiment, two puffer guides 60 may be provided. The two puffer guides 60 are disposed to face each other with the rotation shaft 40 interposed therebetween. That is, the two puffer guides 60 are arranged to be point-symmetric with respect to the rotation shaft 40 .

The puffer guide 60 is formed to surround the movable terminal part 330 . In the above embodiment, one side of the puffer guide 60 facing radially outward of the rotation shaft 40 is open. Accordingly, an arc generated when the movable terminal part 330 rotates may be guided to the arc chute 50 .

The puffer guide 60 coupled to the rotating shaft 40 is rotated together with the rotating shaft 40 when the rotating shaft 40 rotates. That is, the puffer guide 60 may be rotated clockwise or counterclockwise with respect to the rotation shaft 40 . At this time, the puffer guide 60 does not collide with the arc grid 550 .

During the rotation process, the gas inside the arc chamber 310 is compressed and its pressure is increased. The gas passes through the puffer guide 60 and flows in a direction opposite to the rotation. In the flow process, the gas passes through the puffer guide 60 at a high speed, and an arc extinguishing operation may be performed.

In the illustrated embodiment, the puffer guide 60 includes a housing portion 610 , an insertion portion 620 , and a barrier portion 630 .

The housing part 610 forms the exterior of the puffer guide 60 .

The housing part 610 supports the movable terminal part 330 in front and rear and left and right directions.

The housing part 610 is disposed adjacent to the rotation shaft 40 . In addition, the housing part 610 is directly coupled to the rotation shaft 40 . In an embodiment, the housing unit 610 may be coupled to the rotation shaft 40 by welding.

The housing part 610 is formed in the shape of a column with a hollow formed therein. Both sides of the housing part 610 facing the radial direction of the rotation shaft 40 are open.

In the illustrated embodiment, the housing part 610 may be divided into a housing front part 611 , a housing rear part 612 , and a housing side part 613 based on the rotation direction.

The housing front part 611 , the housing rear part 612 , and the housing side part 613 form the front side, the rear side, and the left and right side exteriors of the housing part 600 , respectively.

The housing front part 611 , the housing rear part 612 , and the housing side part 613 are formed to extend radially outward of the rotation shaft 40 .

The housing front part 611 and the housing rear part 612 support the movable terminal part 330 in the front side and rear side directions, respectively.

Both side ends of the housing front part 611 and the housing rear part 612 are connected to the housing side part 613, respectively.

The housing side part 613 supports the movable terminal part 330 in the left and right directions.

In the illustrated embodiment, the housing side part 613 is formed to protrude from the housing front part 611 and the housing rear part 612 radially outward of the rotation shaft 40 . That is, the housing side part 613 is disposed more radially outward with respect to the rotation shaft 40 as compared with the housing front part 611 and the housing rear part 612 .

In an embodiment, an insertion wedge 613a may be formed inside the housing side part 613 .

The insertion wedge 613a is a portion in which the housing unit 610 and the insertion unit 620 are directly coupled.

Insertion wedges 613a are formed on opposite surfaces of housing side portions 613 facing each other. Specifically, the insertion wedge 613a is formed to protrude from the opposite surface of the housing side portion 613 toward the opposite housing side portion 613 .

In an embodiment, a locking protrusion (not shown) may be formed at one end of the insertion wedge 613a. This is to prevent arbitrary release of the coupling between the housing part 610 and the insertion part 620 .

* In the illustrated embodiment, the insertion wedge 613a includes a wedge plate formed in a shape corresponding to the opposite surface of the housing side portion 613 and a column coupled to the opposite surface of the wedge plate and the housing side portion 613, respectively. .

The insertion portion 620 is slidably coupled to the insertion wedge 613a.

The insertion part 620 is coupled to one end of the housing part 610 facing radially outward.

The insertion part 620 is coupled to the housing part 610 in a sliding manner. The insertion part 620 coupled to the housing part 610 is prevented from being randomly dropped by a locking protrusion (not shown) formed in the housing part 610 .

The insertion part 620 rotates together with the housing part 610 when the rotation shaft 40 and the housing part 610 rotate. During the rotation process, the insertion part 620 does not collide with the arc grid 550 . That is, the insertion part 620 is disposed to be spaced apart from the arc grid 550 .

In addition, the distance between the rotation shaft 40 and one end of the radially outwardly facing insertion portion 620 of the rotation shaft 40 is, the one end of the arc grid 550 facing radially inward of the rotation shaft 40 and the rotation shaft ( 40) is formed smaller than the distance between them. That is, the insertion part 620 is disposed more radially inside the frame part 10 as compared to the arc grid 550 .

The insertion part 620 is formed in the shape of a column with a hollow formed therein. Both sides of the insertion portion 620 facing the radial direction of the rotation shaft 40 are open.

In the illustrated embodiment, the insertion portion 620 may be divided into an insertion front portion 621 , an insertion rear portion 622 , and an insertion side portion 623 based on a rotation direction.

The insertion front portion 621 , the insertion rear portion 622 , and the insertion side portion 623 form the front side, the rear side, and the left and right side exteriors of the insertion portion 620 , respectively.

The insertion front portion 621 , the insertion rear portion 622 , and the insertion side portion 623 respectively support the movable terminal portion 330 in the front side, the rear side, and the left and right directions.

The insertion front portion 621 and the insertion rear portion 622 are formed in a plate shape.

Both side ends of the insertion front part 621 and the insertion back part 622 are connected to the insertion side part 623, respectively.

Also, the insertion front portion 621 is coupled to the housing front portion 611 .

*In the illustrated embodiment, the insertion front portion 621 includes a front insertion auxiliary portion 621a and a front recessed portion 621b.

The front insertion auxiliary part 621a prevents the insertion part 620 from being separated from the housing part 610 .

The front insertion auxiliary portion 621a is formed to extend downward from the lower end of the insertion front portion 621 . Specifically, the front insertion auxiliary portion 621a is formed to protrude forward than the insertion front portion 621 .

The front insertion auxiliary portion 621a is formed by plate formation. In the illustrated embodiment, the width in the left and right direction of the front insertion auxiliary part 621a is formed to be smaller than the width in the left and right direction of the insertion front part 621 .

* The front insertion auxiliary part 621a is in contact with the housing front part 611, and supports the housing part 610 from the front side. Accordingly, arbitrary movement and separation of the housing part 610 may be prevented.

In one embodiment, the front insertion auxiliary part 621a may be formed in a shape corresponding to the contact surface of the housing front part 611 .

The front recessed part 621b makes the flow passage of the pressure generated when the rotation shaft 40 rotates narrower, and serves to disperse and extinguish the arc.

It is formed by being depressed in a direction toward the rotation shaft 40 from one side facing the radially outward of the rotation shaft 40 . In the illustrated embodiment, the front recessed portion 621b is formed by recessing downward from the top of the insertion front portion 621 .

The front recessed part 621b is formed so that a predetermined cross-section extends in the thickness direction of the insertion part 620 . In one embodiment, the predetermined cross-section is trapezoidal.

In an embodiment, the front recessed portion 621b may have an edge chamfered.

When the rotation shaft 40 rotates, a portion of the grid legs 553 may pass through a space formed in the front recessed portion 621b.

The insertion front portion 621 is disposed to face the insertion rear portion 622 .

Insertion rear portion 622 is coupled to housing rear portion 612 .

The gas inside the frame part 10 is compressed when the rotation shaft 40 is rotated and flows through the insertion rear part 622 in a state in which the pressure is increased.

In the illustrated embodiment, the insertion rear portion 622 includes a rear insertion auxiliary portion 622a, a rear recessed portion 622b, a rear groove 622c, and a rear through hole 622d.

The rear insertion auxiliary part 622a prevents the insertion part 620 from being separated from the housing part 610 .

The rear insertion auxiliary portion 622a is formed to extend downwardly from the lower end of the insertion rear portion 622 . Specifically, the rear insertion auxiliary portion 622a is formed to protrude rearward than the insertion rear portion 622 .

The rear insertion auxiliary part 622a is formed in a plate shape. In the illustrated embodiment, the width in the left and right direction of the rear insertion auxiliary part 622a is formed smaller than the width in the left and right direction of the insertion rear part 622 .

* The rear insertion auxiliary part 622a is in contact with the housing rear part 612 to support the housing part 610 from the rear side. Accordingly, arbitrary movement and separation of the housing part 610 may be prevented.

In an embodiment, the rear insertion auxiliary part 622a may be formed in a shape corresponding to the contact surface of the housing rear part 612 .

The rear recessed part 622b narrows the flow path of the gas inside the frame part 10, and functions to disperse and extinguish the arc.

The rear recessed portion 622b is formed by being depressed in a direction toward the rotation shaft 40 from one side facing the radially outward side of the rotation shaft 40 . In the illustrated embodiment, the rear recessed portion 622b is formed by being depressed downward from the top of the insertion rear portion 622 .

The rear recessed portion 622b is formed so that a predetermined cross-section extends in the thickness direction of the insertion portion 620 . In one embodiment, the predetermined cross-section is trapezoidal.

In an embodiment, the cross-sectional area of the rear recessed part 622b may be larger than the cross-sectional area of the front recessed part 621b. In the case of the above embodiment, there is a possibility that the arc may not be sufficiently extinguished by the rear recessed portion 622b. This may be supplemented by a barrier part 630 which will be described later. A detailed description thereof will be given later.

In one embodiment, the rear recessed portion 622b may have an edge chamfered.

In addition, when the puffer guide 60 is rotated, a portion of the runner leg 543 and the grid leg 553 passes through the rear recessed portion 622b.

The rear groove 622c is spaced apart from the rear recess 622b.

The rear groove 622c is formed through the rear side of the insertion rear portion 622 . In the illustrated embodiment, the rear groove 622c is formed so that a rectangular cross-section extends in the thickness direction of the insertion rear portion 622 .

However, the rear groove 622c is not limited to the illustrated shape, and may be formed in various shapes. For example, the rear groove 622c may have a circular cross-section extending in the thickness direction of the insertion rear portion 622 .

The rear groove 622c is engaged with the side protrusion 632a of the barrier part 630 . Specifically, the side protrusion 632a of the barrier part 630 is inserted into and coupled to the rear groove 622c. To this end, the rear groove 622c is preferably formed in a shape corresponding to the side protrusion 632a of the barrier part 630 .

The rear through hole 622d is spaced apart from the rear recessed portion 622b and the rear groove 622c, respectively.

The rear through-hole 622d is formed through the rear side of the insertion rear portion 622 . In the illustrated embodiment, the rear through-hole 622d is formed to have a circular cross-section extending in the thickness direction of the insertion rear portion 622 .

However, the rear through-hole 622d is not limited to the illustrated shape, and may be formed in various shapes. For example, the rear through-hole 622d is formed by having a polygonal cross-section extending in the thickness direction of the insertion rear portion 622 .

The rear through-hole 622d is coupled to the barrier coupling part 631 of the barrier part 630 . In one embodiment, the rear through-hole 622d and the barrier coupling portion 631 are coupled by a coupling member (not shown).

The insertion side portion 623 is respectively connected to the left and right sides of the insertion front portion 621 and the insertion rear portion 622 . That is, the insertion side portion 623 is disposed between the insertion front portion 621 and the insertion rear portion 622 .

The insertion side portion 623 is formed to extend radially outward of the rotation shaft 40 .

The insertion side portion 623 is coupled to the housing side portion 613 . Specifically, the insertion side portion 623 is insertedly coupled to the inner opposite surface of the housing side portion 613 .

In one embodiment, the upper end of the inner surface 623a of the insertion side portion 623 may be cut at a predetermined angle. At this time, the inner surface 623a is preferably cut in consideration of the rotation direction of the puffer guide 60 and the size of the arc chute 50 . This is to prevent a collision between the insertion side part 623 and the arc chute 50 .

In the illustrated embodiment, the insertion side portion 623 has an insertion groove 623b.

The insertion groove 623b is a portion into which the insertion wedge 613a of the housing part 610 is inserted and coupled. In an embodiment, the insertion wedge 613a may be slidably inserted into the insertion groove 623b.

The insertion groove 623b is recessed in the outer surface of the insertion side part 623 . In this case, the insertion groove 623b is preferably formed in a shape corresponding to the insertion wedge 613a. Specifically, the cross-sectional area of the insertion groove 623b is preferably formed in a shape corresponding to the cross-sectional area of the insertion wedge 613a.

In one embodiment, the cross-sectional area of the insertion groove 623b may be formed to be larger than the cross-sectional area of the engaging protrusion (not shown) of the insertion wedge 613a.

The barrier part 630 serves to make the arc flow path flowing into the puffer guide 60 narrower.

The barrier part 630 is located on the rear side of the puffer guide 60 . Specifically, the barrier part 630 is coupled to the insertion rear part 622 . In addition, the space formed inside the barrier part 630 communicates with the rear recessed part 622b of the insertion part 620 .

The arc generated when the fixed terminal part 320 and the movable terminal part 330 are separated, collides with the barrier part 630 and then flows into the hollow inside of the insertion part 620 . Specifically, the generated arc passes through the inner space of the barrier part 630 and then flows into the inner hollow of the insertion part 620 through the rear recessed part 622b.

Accordingly, the flow passage of the pressure generated by the rotation of the rotation shaft 40 may be formed narrower. Accordingly, the dispersion extinguishing efficiency of the arc may be further improved.

In the illustrated embodiment, the barrier part 630 includes a barrier coupling part 631 , a barrier side part 632 , and a barrier inclined part 633 .

The barrier coupling part 631 is a part in which the barrier part 630 and the insertion part 620 are directly coupled.

The barrier coupling portion 631 is disposed adjacent to the insertion rear portion 622 .

The barrier coupling part 631 is coupled to at least one of the barrier side part 632 and the barrier inclined part 633 . In an embodiment, the barrier coupling part 631 is coupled to at least one of the barrier side part 632 and the barrier inclined part 633 by a bolt coupling method.

In the illustrated embodiment, the barrier coupling part 631 is coupled to one side of the barrier inclined part 633 . In the above embodiment, the barrier coupling part 631 is formed in a plate shape that is bent and extended at a right angle. However, the barrier coupling portion 631 is not limited to the illustrated shape, and may be formed in various shapes.

In an embodiment, a barrier through hole 631a is formed through the barrier coupling portion 631 .

The barrier through-hole 631a is positioned adjacent to the rear through-hole 622d of the insertion part 620 and communicates with the rear through-hole 622d.

In the illustrated embodiment, the barrier through hole 631a is formed to have a circular cross section extending in the thickness direction of the barrier coupling portion 631 . However, the barrier through hole 631a is not limited to the illustrated shape, and may be formed in various shapes.

In an embodiment, a member such as a bolt may be through-coupled to the barrier through hole 631a.

The barrier side portion 632 forms the side appearance of the barrier portion 630 .

The barrier side portion 632 is formed in a plate shape extending to the rear side. In the illustrated embodiment, the barrier side portion 632 is formed in a polygonal plate shape. However, the barrier side portion 632 is not limited to the illustrated shape, and may be formed in various shapes.

A plurality of barrier side portions 632 may be provided. In the illustrated embodiment, two barrier side portions 632 are provided. In the above embodiment, a barrier inclined portion 633 is disposed between the two barrier side portions 632 .

The barrier side part 632 is coupled to the left and right side surfaces of the barrier inclined part to support the barrier inclined part 633 in the left and right directions.

In the illustrated embodiment, a side protrusion 632a is formed at the front side end of the barrier side portion 632 .

The side projection 632a is formed to protrude from the front side end of the barrier side portion 632 toward the insertion portion 620 .

The side protrusion 632a is a portion into which the rear groove 622c of the insertion part 620 is inserted and coupled. To this end, the side protrusion 632a is preferably formed in a shape corresponding to the rear groove 622c.

In the illustrated embodiment, the side protrusion 632a has a rectangular cross-section extending in the thickness direction of the barrier side portion 632 . However, the side protrusion 632a is not limited to the illustrated shape, and may be formed in various shapes. For example, the side protrusion 632a may have a circular cross-section extending in the thickness direction of the barrier side portion 632 .

The barrier inclined portion 633 forms the lower and rear side exteriors of the barrier portion 630 .

In an embodiment, the barrier inclined portion 633 may be formed in a plate shape. Also, the barrier inclined portion 633 may be disposed to form a predetermined angle with the insertion rear portion 622 . In the illustrated embodiment, the predetermined angle is formed as an acute angle.

In an embodiment, a plurality of barrier inclined portions 633 may be provided. In the above embodiment, the different barrier slopes 633 are spaced apart from each other. In the illustrated embodiment, two barrier slopes 633 are provided.

The barrier inclined portion 633 is coupled to the barrier side portion 632 . In one embodiment, the barrier slope 633 is disposed between the barrier side portions 632 facing each other.

3. Description of the puffer guide 70 according to another embodiment of the present invention

Referring back to FIGS. 1 to 3 , the load switch 1 according to an embodiment of the present invention includes puffer guides 60 and 70 .

The puffer guide 70 according to the present embodiment corresponds to the puffer guide 60 according to the above-described embodiment in function and structure. However, the puffer guide 70 according to the present embodiment is different from the puffer guide 60 according to the above-described embodiment in some components.

Specifically, the puffer guide 70 according to the present embodiment is a puffer guide ( 60) is different.

In addition, in the puffer guide 70 according to this embodiment, the insertion part 720 is partially cut so that the movable terminal part 330 is exposed to the outside of the puffer guide 70, the puffer guide ( 60) is different.

Hereinafter, the puffer guide 70 according to the present embodiment will be described with reference to FIGS. 29 to 38 , focusing on differences from the puffer guide 60 according to the above-described embodiment.

The puffer guide 70 according to the present embodiment includes a housing part 710 , an insertion part 720 , and a barrier part 730 .

Among the components, the housing unit 710 and the insertion unit 720 have the same structure, function, and coupling structure as the housing unit 610 and the insertion unit 620 according to the above-described embodiment.

The barrier unit 730 has almost the same structure and function as the barrier unit 630 according to the above-described embodiment. However, the barrier part 730 according to the present embodiment is different in that the barrier coupling part 731 , the barrier side part 732 , and the barrier bottom part 733 are integrally formed.

The barrier part 730 according to the present embodiment is integrally formed. Specifically, the barrier part 730 may be divided into a barrier coupling part 731 , a barrier side part 732 , and a barrier bottom part 733 .

Among the components, the barrier side part 732 has the same structure, function, and coupling structure as the barrier side part 632 according to the above-described embodiment.

* The barrier coupling portion 731 is disposed adjacent to at least one of the barrier side portion 732 and the barrier bottom portion 733 . Specifically, the barrier coupling portion 731 is formed to extend from at least one of the barrier side portion 732 and the barrier bottom portion 733 .

In the illustrated embodiment, the barrier coupling portion 731 is formed to extend from the barrier side portion 732 and the barrier bottom portion 733 . In the above embodiment, the barrier coupling portion 731 is formed in a plate shape extending along the barrier side portion 732 and the barrier bottom portion 733 . However, the barrier coupling portion 731 is not limited to the illustrated shape, and may be formed in various shapes.

In an embodiment, a barrier through hole 731a may be formed through the barrier coupling portion 731 .

The barrier through-hole 731a has the same structure, function, and coupling structure as the barrier through-hole 631a according to the above-described embodiment.

The barrier bottom portion 733 forms a lower exterior of the barrier portion 730 .

* In one embodiment, the barrier bottom portion 733 is formed in a plate shape. In addition, the barrier bottom portion 733 may be disposed to form a predetermined angle with the insertion rear portion 722 . In the illustrated embodiment, the predetermined angle is formed at a right angle.

The barrier bottom portion 733 is connected to the barrier side portion 732 . Specifically, both ends of the left and right sides of the barrier bottom portion 733 are respectively connected to the lower ends of the barrier side portion 732 .

4. Description of the process in which the arc extinguishing operation is performed in the load switchgear 1 according to the embodiment of the present invention

Hereinafter, an arc extinguishing operation of the load switch 1 according to an embodiment of the present invention will be described with reference to FIG. 39 . The rotation direction of each component will be understood with reference to FIG. 39 .

Fig. 39(a) shows the load switchgear 1 in a state before the arc A is generated, and FIG. 39b shows the load switch 1 in a state after the arc A is generated.

When the movable contact 332 is rotated in a direction away from the fixed

contacts

321b and 322b, the movable contact 332 and the fixed

contacts

321b and 322b are separated from each other and an arc A is generated.

A portion of the generated arc A is primarily guided toward the arc runner 540 . A portion of the arc A directed toward the arc runner 540 is moved from the arc runner 540 toward the arc grid 550 . Specifically, a portion of the arc A is moved toward the grid concave portion 553a of the arc grid 550 .

The remaining part of the generated arc A is introduced into the inner space of the puffer guides 60 and 70 and can be extinguished. The specific process is as follows.

The gas inside the arc chamber 310 may be momentarily compressed by the pressure generated by the rotation of the rotation shaft 40 . Accordingly, the arc A may be introduced into the inner space of the puffer guides 60 and 70 together with the gas.

The arc A introduced into the puffer guides 60 and 70 first collides with the

barrier portions

630 and 730 and then flows into the insertion

rear portions

622 and 722 . Accordingly, the pressure movement passage passing through the rear inlet of the puffer guides 60 and 70 may be formed narrower. Furthermore, the pressure of the fluid is concentrated, and the dispersion effect of the arc A can be maximized.

In the above process, the arc A passes through the puffer guides 60 and 70 at a faster speed, and an effect of improving the arc extinguishing effect is generated.

Although the above has been described with reference to the preferred embodiment of the present invention, the present invention is not limited to the configuration of the above-described embodiments.

In addition, the present invention may be variously modified and changed by those of ordinary skill in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below.

Claims

fixed terminal unit;

movable terminal unit;

a rotation shaft rotatable relative to the fixed terminal portion and rotatable together with the movable terminal portion; and

A hollow accommodating the movable terminal part is formed therein, and it is coupled to the outer circumferential surface of the rotating shaft and includes a puffer guide that can be rotated together with the rotating shaft,

The puffer guide,

It is formed in the shape of a column extending in the radial direction of the rotation shaft, the insertion portion; and

It includes a barrier part coupled to one surface of the insertion part,

The barrier part,

a plurality of barrier side portions formed in a plate shape and extending in a direction away from the one surface of the insertion portion; and

It is positioned between the plurality of the barrier side portions, is formed in a plate shape, and comprises a barrier inclined portion coupled to the insertion portion and forming a predetermined angle,

load switchgear.
According to claim 1,

A plurality of barrier slopes are provided,

The different barrier slopes are spaced apart from each other,

load switchgear.
According to claim 1,

The movable terminal part,

a movable contact capable of being in contact with or separated from the fixed terminal unit; and

It is formed in the shape of a rod extending in the radial direction of the rotation shaft, and includes a movable contact point at one end of which the movable contact is formed,

The puffer guide,

Accommodating the movable contact bar inside, the movable contact is disposed on the outside,

load switchgear.
4. The method of claim 3,

Comprising an arc chute having a plurality of arc grids spaced apart from the fixed terminal portion,

The arc grid is

a grid base formed in a plate shape; and

and two grid legs extending radially inward of the rotation shaft from one side of the grid base part,

The grid leg,

The distance between the one end facing the radially inward of the rotary shaft and the rotary shaft is formed smaller than the distance between the movable contact and the rotary shaft,

A grid recess is formed in the space between the two grid legs,

The grid concave portion,

The width is formed to be larger than the width of the movable contact, and the movable contact is passed thereinto and is rotated,

load switchgear.
According to claim 1,

The puffer guide,

It is disposed adjacent to the outer circumferential surface of the rotation shaft, is formed in a column shape extending radially outward of the rotation shaft, and includes a housing portion in which an insertion wedge is protruded from at least one surface,

An insertion groove is recessed in at least one surface of the insertion part,

The insertion groove is

Formed in a shape corresponding to the insertion wedge, the insertion wedge is coupled by sliding,

load switchgear.
6. The method of claim 5,

At least one portion of the outer peripheral surface of the insertion portion,

Protruding in a direction away from the outer circumferential surface, an insertion auxiliary portion extending toward the rotation shaft is formed,

load switchgear.
According to claim 1,

The barrier part,

and a barrier coupling part positioned adjacent to the one surface of the insertion part,

A portion of the insertion part and the barrier coupling part,

Insertion part through-holes and barrier through-holes are formed, respectively,

The insertion part through-hole and the barrier through-hole,

disposed adjacent to each other and coupled in a bolted manner,

load switchgear.
8. The method of claim 7,

The barrier coupling portion,

coupled to one side of the barrier slope,

load switchgear.
8. The method of claim 7,

The barrier coupling portion,

coupled to one side of the barrier side part,

load switchgear.
According to claim 1,

On at least one side of the insertion part,

A depression formed by cutting toward the rotating shaft is provided,

load switchgear.
According to claim 1,

The inner peripheral surface of the insertion part,

At least a portion of the upper end is cut at a predetermined angle,

load switchgear.
an opening/closing unit including a fixed terminal unit and a movable terminal unit;

a rotation shaft rotatable relative to the fixed terminal portion and rotatable together with the movable terminal portion; and

A hollow accommodating the movable terminal part is formed therein, and it includes a puffer guide that is coupled to the outer circumferential surface of the rotating shaft and can be rotated together with the rotating shaft,

The puffer guide,

It is formed in the shape of a column extending in the radial direction of the rotation shaft, the insertion portion; and

It includes a barrier part coupled to one surface of the insertion part,

The barrier part,

a plurality of barrier side portions formed in a plate shape and extending in a direction away from the one surface of the insertion part; and

It is disposed between the different barrier side parts, connects one end of the different barrier side parts, and comprises a barrier bottom part coupled to the insertion part at a predetermined angle,

load switchgear.
13. The method of claim 12,

Comprising an arc chute having a plurality of arc grids spaced apart from the fixed terminal portion,

The arc grid is

a grid base formed in a plate shape; and

and two grid legs extending radially inward of the rotation shaft from one side of the grid base part,

The movable terminal part,

a movable contact capable of being in contact with or separated from the fixed terminal unit; and

It is formed in the shape of a rod extending in the radial direction of the rotation shaft, and includes a movable contact point at one end of which the movable contact is formed,

The puffer guide,

Accommodating the movable contact bar inside, the movable contact is disposed outside,

The grid leg,

The distance between the one end facing the radially inward of the rotary shaft and the rotary shaft is formed smaller than the distance between the movable contact and the rotary shaft,

A grid recess is formed in the space between the two grid legs,

The grid concave portion,

The width is formed to be larger than the width of the movable contact, and the movable contact is passed thereinto and is rotated,

load switchgear.
13. The method of claim 12,

The puffer guide,

It is disposed adjacent to the outer circumferential surface of the rotation shaft, is formed in a column shape extending radially outward of the rotation shaft, and includes a housing portion in which an insertion wedge is protruded from at least one surface,

An insertion groove is recessed in at least one surface of the insertion part,

The insertion groove is

Formed in a shape corresponding to the insertion wedge, the insertion wedge is coupled by sliding,

load switchgear.
15. The method of claim 14,

At least one portion of the outer peripheral surface of the insertion portion,

Protruding in a direction away from the outer circumferential surface, an insertion auxiliary portion extending toward the rotation shaft is formed,

load switchgear.
13. The method of claim 12,

The barrier part,

and a barrier coupling part positioned adjacent to the one surface of the insertion part and extending from one end of at least one of the barrier side part and the barrier bottom part;

load switchgear.
17. The method of claim 16,

A portion of the insertion part and the barrier coupling part,

Insertion part through-holes and barrier through-holes are formed, respectively,

The insertion part through-hole and the barrier through-hole,

disposed adjacent to each other and coupled in a bolted manner,

load switchgear.