KR20160067512A - Branching circuit breaker formed cutting partition part for cutting arc gas - Google Patents

Abstract

The present invention relates to a branch circuit breaker, and more specifically, to a branch circuit breaker having an arc gas circuit breaker, in which a blocking unit for blocking of conductive arc gases emitted by blocking of a short-circuit current is formed. The branch circuit breaker comprises: a front case part formed on a front surface; a rear case part detachably formed on the front case part; and an arc gas circuit breaker fastened in an upper part of the front case part. The arc gas circuit breaker includes: an upper detachable part fastened in the upper part of the front case part; an upper partition part surrounding at least two sub busbars of the branch circuit breaker; and a back partition part extending downwards from the upper partition part along the rear case part of the branch circuit breaker. According to the present invention, conductive arc gases generated during blocking of a short-circuit current is prevented from being transited to a sub busbar connected to an adjacent branch circuit breaker.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a branch circuit breaker having an arc gas cut-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch circuit breaker, and more particularly, to a branch circuit breaker having an arc gas cutoff portion in which a blocking means for blocking a conductive arc gas emitted by breaking a short circuit is formed.

In general, the distribution panel is a device in which various kinds of circuit breakers such as a main power circuit breaker, an auxiliary power circuit breaker and an earth leakage breaker are installed on the base panel and the breakers are electrically connected to each other. It is used to re-supply each element and to open and close the power supply. In addition, a bus bar made of a thick plate material such as a copper plate is used for connecting terminals and terminals in the distribution board.

The patent literature described in the following prior art document is Korean Registration No. 10-0996857, which relates to a direct mounting stand for a wiring breaker and a switchboard having the same, comprising a three-phase bus bar 210 arranged in parallel, ; An MCCB mounting base 300 to be plugged into the three-phase bus bar; And a wiring circuit breaker (100) which is plug-coupled to the MCCB mount and electrically connected to the bus bar, and a switchboard comprising the same.

However, the prior art document has a problem in that it is difficult to easily block the conductive arc gas generated by short-circuit current interruption of the branch circuit breaker.

Also, there is not disclosed a technique for shutting off the conductive arc gas to the branch circuit breaker of the adjacent branch circuit without any additional processing on the branch circuit breaker of the existing distribution panel.

Accordingly, there is a strong demand for a technique of easily blocking the conductive arc gas generated by the short-circuit current interruption of the branch circuit breaker, and blocking the conductive arc gas to the branch circuit breaker of the adjacent branch circuit breaker without separately processing the branch circuit breaker of the existing distribution panel.

Patent No .: Korean Registration No. 10-0996857 Name of patent: Direct mounting base of wiring breaker and distribution board with it

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the conventional art as described above, and it is an object of the present invention to provide a branch circuit breaker which can easily block the conductive arc gas generated by short- And an arc gas blocking portion that is easily attached to and detached from the existing branch circuit breaker.

To this end, the branch circuit breaker having the arc gas shutoff unit according to the present invention comprises: a front case part formed on the front surface; A rear case part for attaching / detaching the front case part; And an arc gas shutoff unit coupled to an upper portion of the front case unit, wherein the arc gas shutoff unit includes: an upper detachable unit coupled to an upper portion of the front case unit; An upper partition wall surrounding at least two charger bus bars of the branch circuit breaker; And a rear wall part extending downward from the upper partition part along the rear case part of the branch circuit breaker.

Wherein the upper detachable portion includes: a cylindrical insertion member inserted into a fastening hole provided at an upper portion of the front case portion; A first support member formed integrally with the insertion member and supporting the insertion member from above; And a second support member integrally formed with the first support member and having a right angle, wherein the insertion member has at least one hole.

Wherein the upper partition wall includes a first upper partition wall, a second upper partition wall and a third upper partition wall, and the first upper partition wall and the second upper partition wall surround a first charger bus bar electrically connected to the branch breaker, The second upper partition wall and the third upper partition wall surround the second charger bus bar electrically connected to the branch breaker, and the upper partition wall is formed to be in close contact with the charger bus bar connecting portion of the branch breaker, .

Sectional shape of the upper partition wall is formed in an 'E' shape which surrounds the charger bus bar electrically connected to the branch breaker.

A bottom surface partition wall portion including first to third bottom surface partition walls extending along the bottom surface of the rear case portion and the bottom surface of the front case portion and being shielded from a front surface parallel to the front case portion; And a lower detachable portion for fixing the bottom wall portion to the front case portion, wherein the upper partition wall portion, the rear wall portion and the bottom wall portion are formed so as to surround the charger bus bar electrically connected to the branch breaker Wherein the first top, first back and first bottom barrier ribs and the second top, second back and second bottom barrier ribs surround the electric wire that draws power from the first charger bus bar and the first charger bus bar, The second upper, second and lower bottom barrier ribs and the third upper, third back, and third bottom barrier ribs are formed to surround the electric wire for drawing power from the second and third sub- And is formed to be in close contact with the charger bus bar and the wire connecting portion of the branch circuit breaker, and is formed of an insulating material.

Wherein the upper detachable portion and the lower detachable portion include insertion members inserted into the corresponding locking holes provided at the upper and lower portions of the front case portion; A first support member formed integrally with the insertion member and supporting the insertion member from above; And a second support member integrally formed with the first support member and having a rectangular shape, wherein the insert member has a driver groove formed on a front surface thereof and at least one hole on a side surface thereof, And are separated from each other.

Sectional shape of the upper partition wall portion and the bottom wall portion is formed in an 'E' shape that surrounds the charger bus bar electrically connected to the branch circuit breaker and the electric wire drawing power from the charger bus bar.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed in the meaning and concept consistent with the technical idea of the present invention.

According to various embodiments of the present invention, the branch circuit breaker includes the arc gas blocking portion formed with at least one barrier rib, thereby effectively blocking the conductive arc gas generated by the short circuit current interruption of the branch circuit breaker.

In addition, according to various embodiments of the present invention, the arc gas shutoff part is formed in a structure that can be attached to and detached from the branch circuit breaker, and is applicable to the existing branch circuit breaker, thereby providing an economical effect of reducing the installation cost.

In addition, according to various embodiments of the present invention, the branch circuit breaker includes the arc gas blocking portion formed with at least one barrier rib, so that the conductive arc gas emitted while the short circuit current is blocked by the branch circuit breaker is diffused into the adjacent branch circuit breaker, There is also an effect that it is possible to prevent the occurrence of a problem that is caused by

Therefore, according to various embodiments of the present invention, it is ultimately effective to protect people and property by preventing large-scale accident caused by electric leakage.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary diagram showing a distribution board provided with a branch breaker having an arc gas cutoff unit according to an embodiment of the present invention. FIG.
FIG. 2 is an overall perspective view showing an example in which an arc gas barrier is fastened to a branch circuit breaker according to an embodiment of the present invention; FIG.
3 is a side view showing an example in which the arc gas blocking portion according to the embodiment of the present invention is separated from the branch circuit breaker.
4 is a perspective view showing in detail one side of an arc gas blocking portion according to an embodiment of the present invention.
5 is a perspective view showing in detail the other side of the arc gas blocking part according to the embodiment of the present invention.
FIG. 6 is a perspective view of a branch circuit breaker having a second arc gas barrier portion having a rear barrier rib according to another embodiment of the present invention; FIG.
7 is an exploded perspective view of a second arc gas blocking portion having the rear wall portion and the branch breaker.
FIG. 8 is a perspective view of a branch circuit breaker having a rear wall part and a third arc gas blocking part having a bottom wall part according to another embodiment of the present invention; FIG.
9 is an exploded perspective view of a third arc gas blocking portion having the rear wall portion and the bottom wall portion and the branch breaker.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages, and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements have the same numerical numbers as much as possible even if they are displayed on different drawings. Also, the terms " first ", " second ", and the like are used to distinguish one element from another element, and the element is not limited thereto.

Also, the singular forms as used below include plural forms unless the phrases expressly have the opposite meaning. Throughout the specification, when an element is referred to as "including" an element, it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.

The same reference numerals are given to the same members in Figs. 1 to 5.

The basic principle of the present invention is that a discharge breaker and an attachable and detachable arc gas blocking unit are provided to cut off an arc gas generated when a short circuit current is cut off, wherein the arc gas blocking unit has at least one barrier rib.

Here, when the arc gas is brought into contact with the electrode and a strong current flows, the tip of the electrode is overheated by the contact resistance, and the electrode evaporates to generate vapor of the metal and discharge. This state is referred to as arc discharge, and the gas generated at this time is arc-saturated, and the arc gas is conductive.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram illustrating an example of a distribution panel provided with a branch breaker having an arc gas barrier according to an embodiment of the present invention.

Referring to FIG. 1, a distribution board A including a branch breaker 100 having an arc gas barrier according to the present invention includes a main power circuit breaker a, a main bus bar b, a branch breaker 100, (c).

The distribution board A according to the embodiment of the present invention constructed as shown in FIG. 1 will be described in detail as follows.

First, a main power source circuit breaker (a) for receiving a power source transmitted from the outside is disclosed.

The main circuit breaker (a) receives power transmitted from the outside, and the branch circuit breaker (100) distributes the power from the main power circuit breaker (a) or cuts off the distributed power. The branch circuit breaker 120 is a term including an auxiliary power circuit breaker for distributing and outputting power from the main power circuit breaker a and an earth leakage circuit breaker for shutting off the power distributed in case of a short circuit.

The main bus bar (b) is coupled to the main bus breaker (a) and is electrically connected to the main bus breaker (a), and the auxiliary bus bar (c) is connected to the bus bar bar (b) And electrically connects the busbar bar (b) and the branch circuit breaker (100).

Here, the branch circuit breaker 100 is provided with at least one barrier rib for preventing the arc gas generated when the short-circuit current is cut off from being transmitted to the charger busbar c connected to the branch breaker 100, (130) is fastened. The arc gas shutoff unit 130 will be described with reference to FIG.

The branch circuit breaker 100 described in the following FIG. 2 has been described on the assumption that the branch circuit breaker 100 having two charger busbars c are connected to each other. However, this is merely an example, and the number of the charger busbars c It is preferable not to limit it.

FIG. 2 is an overall perspective view showing an example in which the arc gas blocking part is fastened to the branch circuit breaker according to the embodiment of the present invention, and FIG. 3 is a view showing an example in which the arc gas blocking part according to the embodiment of the present invention is separated from the branch circuit breaker Side view. FIG. 4 is a perspective view showing details of one side of an arc gas blocking part according to an embodiment of the present invention, and FIG. 5 is a perspective view showing the other side of the arc gas blocking part according to an embodiment of the present invention in detail.

2 and 3, the branch circuit breaker 100 according to the embodiment of the present invention includes a front case part 110, a rear case part 120, and an arc gas blocking part 130.

The branch circuit breaker 100 constructed as shown in FIG. 2 according to the embodiment of the present invention will be described in detail as follows.

2, a front case 110 is provided on a front surface of the branch circuit breaker 100 and a fastening hole 111 is formed on an upper surface of the front case 110. The arc gas blocking part 130, Respectively. Preferably, a switch hole Sh is provided on the upper surface of the front case part 110 so that the switch S protrudes to the outside.

Referring to FIG. 3, it is preferable that the fastening hole 111 is provided between the first hole h1 and the second hole h2.

Meanwhile, the arc gas shutoff part 130 is provided with an upper detachable part 131 for fastening with the fastening hole 111. That is, the detachable portion 131 is inserted into the fastening hole 111 to be fastened.

4, the partition 132 of the arc gas barrier 130 is formed to surround the charger bus bars C and D electrically connected to the branch breaker 100, (C, D), as well as the adjacent branch circuit breaker to block the conductive arc gas and the short-circuit current.

The upper detachable portion 131 and the partition wall portion 132 will be described in detail with reference to FIGS. 4 and 5 below.

Referring to FIG. 4, the arc gas shutoff unit 130 includes an upper detachable portion 131 and an upper partition 132.

First, the upper detachable portion 131 includes an insertion member 131a, a first support 131b, and a second support 131c.

First, the insertion member 131a is inserted into the fastening hole 111 provided in the front case part 110. 5, it is preferable that the insertion member 131a is formed in a cylindrical shape, but it may be formed in a polygonal shape such as triangular, square or the like depending on the shape of the fastening hole 111. [

It is preferable that the insertion member 131a is provided with at least one groove F for improving the supporting force when the insertion member 131a is inserted into the fastening hole 111. [

That is, the radius of the insertion member 131a is slightly larger than the coupling hole 111, and one end of the insertion member 131a is inserted with a reduced radius by the groove F at the time of insertion. After one end is completely inserted, The fastening of the insertion member 131a and the fastening hole 111 can be maintained.

5, it is assumed that the number of the grooves F is 4. However, since the number of grooves F can be arbitrarily determined such as 1, 2, 3 to n, it is preferable that the number of grooves F is not limited to four.

The other end of the insertion member 131a is provided with a first support 131b for supporting the insertion member 131a. Here, the first support 131b is preferably integrally formed with the insertion member 131a.

A second support 131c is provided at a right angle to the first support 131b. Similarly, the first support 131b and the second support 131c are preferably integrally formed but are not limited thereto.

The second support base 131c is integrally connected to the upper partition wall 132 and supports the upper partition wall 132 by inserting the insertion member 131a into the coupling hole 111. [

Preferably, the insertion member 131a, the first support 131b, and the second support 131c are formed of an insulating material for shielding the short-circuit current with the conductive arc gas.

On the other hand, an upper partition wall 132 is provided under the second support table 131c.

The upper partition wall portion 132 includes a first upper partition wall 132a, a second upper partition wall 132b, and a third upper partition wall 132c.

Each of the first upper partition wall 132a and the second upper partition wall 132b is formed in a shape of a C shape and the first upper partition wall 132a and the second upper partition wall 132b are connected to the first sub- C). The second upper partition wall 132b and the third upper partition wall 132c enclose the second charger bus bar D, respectively.

That is, the second upper partition wall 132b is provided in the middle of the first upper partition wall 132a and the third upper partition wall 132c.

Particularly, it is preferable that the first upper partition wall 132a to the third upper partition wall 132c are formed to be in close contact with the front portion of the branch circuit breaker 100.

The first upper partition wall 132a to the third upper partition wall 132c may be formed of an insulating material such as plastic, rubber, or wood for blocking the conductive arc gas. However, the present invention is not limited thereto.

4 and 5, the cross section of the upper partition wall 132 is formed in an 'E' shape, and the second upper partition wall 132b formed at the center thereof blocks the short- It is possible to prevent the transition between the first charger bus bar (C) and the second charger bus bar (D).

The upper partition wall 132 may further include a first upper partition wall 132a and a third upper partition wall 132c to prevent the conductive arc gas from being transferred to the adjacent branch circuit breaker.

6 is a perspective view of a second branch breaker 100A coupled with a second arc gas barrier portion having a rear barrier rib portion according to another embodiment of the present invention, And the second branch circuit breaker 100A.

As shown in FIGS. 6 and 7, the second branch circuit breaker 100A includes:

The arc gas barrier of FIG. 1 to FIG. 5 further includes a rear wall part. That is, the second arc-gas shutoff part 130UR of the second branch circuit breaker 100A

The first upper partition wall 132a, the second upper partition wall 132b and the third upper partition wall 132c constituting the upper partition wall portion 132 are extended to the back side of the second support base 131c, The first rear barrier rib 132Ra, the second rear barrier rib 132Rb, and the third rear barrier rib 132Rc, which are in close contact with the rear surface, (132R).

The first rear barrier rib 132Ra and the second rear barrier rib 132Rb shield the region where the first charger bus bar C extends from the rear surface of the second branch circuit breaker 100A.

The second rear barrier rib 132Rb and the third rear barrier rib Rc shield the region where the second charger bus bar B extends from the rear surface of the second branch circuit breaker 100A.

As a result, the conductive arc gas generated when the short-circuit current is cut off by the second branch circuit breaker 100A flows from the upper surface and the rear surface of the second branch circuit breaker 100A to the first charger busbar C and the second charger busbar (D). Further, the first rear barrier rib 132Ra and the third rear barrier rib 132Rc are further provided to prevent the conductive arc gas from being transferred to the adjacent branch breaker.

8 is a perspective view of a third branch circuit breaker 100B coupled with a third arc gas blocking unit 130URL having a rear side wall part and a bottom side wall part according to another embodiment of the present invention, An arc gas blocking portion 130URL and the third branch circuit breaker 100B.

The third branch circuit breaker 100B of FIGS. 8 and 9 includes an upper detachable part 131U and a lower detachable part 131L. The third branch circuit breaker 100B of FIG. 8 and FIG. And a bottom wall part 132L formed on the bottom wall part 132L.

Specifically, the second arc gas blocking portion 130UR of the third branch circuit breaker 100B shown in FIGS. 8 and 9 includes an upper partition wall portion 132, a defective partition wall portion 132R, and a bottom wall partition portion 132L do. Here, the configurations of the upper partition wall 132 and the rear partition wall 132R are the same as those of the second arc gas shutoff unit 130UR of FIGS. 6 and 7, and thus a detailed description thereof will be omitted.

The bottom wall part 132R includes a first bottom wall 132La extending to cover the bottom face of the front case part 110 and the rear case part 120 on the side where the bottom wall part 132R extends downward, A second bottom barrier rib 132Lb, and a third bottom barrier rib 132Lc.

The first bottom barrier rib 132La and the second bottom barrier rib 132Lb are formed in a U shape and the first bottom barrier rib 132La and the second bottom barrier rib 132Lb are connected to the third branch barrier 100B ) Of the first charger bus bar (C). And the second bottom barrier rib 132Lb and the third bottom barrier rib 132Lc surround the electric wire for drawing the power of the second charger bus bar D. [

The first bottom barrier rib 132La, the second bottom barrier rib 132Lb, and the third bottom barrier rib 132Lc may be formed of an insulating material such as plastic, rubber, or wood to shield the conductive arc gas. I do not.

8 and 9, the cross section of the bottom wall part 132L is formed in an 'E' shape, and the second bottom wall 132Lb formed at the center thereof blocks the short-circuit current, It is possible to prevent the transition between the wires for drawing the power supply of the one-sided bus bar (C) and the second slave bus bar (D).

In addition, the bottom partition 132L may further include a first bottom partition 132La and a third bottom partition 132Lc to prevent the conductive arc gas from being transferred to the adjacent branch circuit breaker.

9, the upper detachable portion 131U includes an upper insertion member 131Ua, a first support 131b and a second support 131c, and the lower detachable portion 132L Includes a lower insertion member 131La, a first support 131b, and a second support 131c.

Driver grooves 131Sa are formed on the front surfaces of the upper insertion member 131Ua and the lower insertion member 131La. A thread 131Sb is formed on the outer peripheral surface of the body so as to be detachable from the first support 131b. The first support base 131b is formed with an insertion member coupling hole 131bF into which the upper insertion member 131Ua and the lower insertion member 131La are connected.

The upper insertion member 131Ua is inserted into the upper fastening hole 111 provided in the front case part 110 and the lower insertion member 131Ua is inserted into the lower fastening hole 111. [ And the lower hole 131La is inserted into the lower fastening hole 111L located between the third hole h3 and the fourth hole h4. 9, the upper insertion member 131Ua and the lower insertion member 131La are formed in a cylindrical shape and threaded on the outer circumferential surface of the insertion member coupling groove 131bF of each first support base 131b And is configured to be screwed. Also, the upper insertion member 131Ua and the lower insertion member 131La may be formed as polygons such as triangular, square or the like depending on the shape of the fastening holes 111 and 111L.

The upper insertion member 131Ua and the lower insertion member 131La are preferably provided with at least one groove F for improving the supporting force when the upper insertion member 131Ua and the lower insertion member 131La are inserted into the coupling holes 111 and 111L.

That is, the radii of the upper insertion member 131Ua and the lower insertion member 131La are slightly larger than the coupling holes 111 and 111L so that one end is inserted with a reduced radius by the groove F upon insertion, After being inserted, it is fixed to the inside of the fastening holes 111 and 111L by elasticity, so that fastening of the upper and lower insertion members 131Ua and 131La and fastening holes 111 and 111L can be maintained.

Although the number of the grooves F is assumed to be four in Fig. 9, since the number of the grooves F can be arbitrarily determined such as 1, 2, 3 to n, it is preferable that the number of the grooves F is not necessarily limited to four As mentioned above.

The other end of the upper and lower insertion members 131Ua and 131La is provided with a first support 131b for supporting the upper and lower insertion members 131Ua and 131La. Here, the first support 131b is preferably integrally formed with the insertion member 131a.

A second support 131c is provided at a right angle to the first support 131b. Similarly, the first support 131b and the second support 131c are preferably integrally formed but are not limited thereto.

Each of the second supports 131c is integrally connected to the upper partition wall 132 and the lower partition wall 132L so that the upper and lower insertion members 131Ua and 131La are inserted into the coupling holes 111 and 111L And serves to fix and support the third arc gas shutoff part 130URL to the branch circuit breaker.

Preferably, the upper and lower insertion members 131Ua and 131La, the first support 131b, and the second support 131c are also formed of an insulating material for shielding the short-circuit current with the conductive arc gas.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

A: Distribution board a: Main power breaker
b: Bus bar bus bar c: Charity bus bar
100: Branch circuit breaker 100A: Second branch circuit breaker
100B: third branch circuit breaker 110: front case part
120: rear case part 130: arc gas blocking part
130UR: the second arc gas blocking portion
130URL: Third arc gas shutoff unit
111: fastening hole h1: first hole
h2: second hole h3: third hole
h4: Fourth hole S: Switch
Sh: switch hole 131: detachable part
131U: upper attachment / detachment unit 131L:
132: upper partition wall portion 131a: insertion member
131Ua: upper insertion member 131La: lower insertion member
131Sa: Driver groove 131Sb: Threaded
131bF: insertion member engaging hole
131b: first support base 131c: second support base
F: groove 132a: first upper partition wall
132b: second upper partition wall 132c: third upper partition wall
132R: rear partition wall portion 132Ra: first rear partition wall
132Rb: second rear barrier rib 132Rc: third rear barrier rib
132L: bottom wall part 132La: first bottom wall
132Lb: second bottom surface partition wall 132Lc: third bottom surface partition wall
C: First charger booth bar D: Second charger booth bar

Claims (7)

A front case part formed on the front side;
A rear case part for attaching / detaching the front case part; And
And an arc gas shutoff unit coupled to an upper portion of the front case unit,
The arc gas cut-
An upper detachable portion coupled to an upper portion of the front case portion;
An upper partition wall surrounding at least two charger bus bars of the branch circuit breaker; And
And a rear wall part extending downward from the upper partition part along the rear case part of the branch circuit breaker.
[2] The apparatus of claim 1,
A cylindrical insertion member inserted into a fastening hole provided in an upper portion of the front case part;
A first support member formed integrally with the insertion member and supporting the insertion member from above; And
Wherein the inserting member includes at least one hole, the inserting member including at least one hole, the inserting member being integrally formed with the first supporting member and having a right angle with the first supporting member.
The plasma display panel of claim 1,
A first upper partition wall, a second upper partition wall and a third upper partition wall,
Wherein the first upper partition wall and the second upper partition wall surround a first charger bus bar electrically connected to the branch breaker,
The second upper partition wall and the third upper partition wall surround a second charger bus bar electrically connected to the branch breaker,
Wherein the upper partition wall is formed so as to be in close contact with the charger bus bar connection portion of the branch breaker, and is formed of an insulating material.
[4] The branch circuit breaker of claim 3, wherein the upper partition wall is formed in an 'E' shape that surrounds each of the charger busbars electrically connected to the branch breaker.
The method of claim 3,
A bottom surface partition wall portion including first to third bottom surface partition walls extending along the bottom surface of the rear case portion and the bottom surface of the front case portion and being shielded from a front surface parallel to the front case portion; And
And a lower detachable part fixing the bottom wall part to the front case part,
The upper partition wall portion, the rear wall portion, and the bottom wall portion are formed so as to surround the respective charger bus bars electrically connected to the branch breaker,
The first upper portion, the first back surface, and the first bottom surface partition wall, and the second top portion, the second back surface, and the second bottom surface partition wall surround the electric wire for drawing the power of the first charger bus bar and the first charger bus bar,
The second top, second back and second bottom barrier ribs and the third top, third back, and third bottom barrier ribs are formed to surround the wires for drawing power from the second and third charger bus bars,
Wherein the branch circuit breaker is formed to be in close contact with the charger bus bar and the wire connecting portion of the branch circuit breaker, and is formed of an insulating material.
[7] The apparatus of claim 5, wherein the upper detachable portion and the lower detachable portion comprise:
An inserting member inserted into a corresponding fastening hole provided at upper and lower portions of the front case part;
A first support member formed integrally with the insertion member and supporting the insertion member from above; And
And a second support member integrally formed with the first support member and having a right angle,
Wherein the insertion member has a driver groove formed in the front surface thereof, at least one hole formed in the side surface thereof, and a separate structure detachably coupled with the first support member.
The method of claim 6,
Sectional shape of the upper partition wall portion and the bottom wall portion is formed in an 'E' shape that surrounds the charger bus bar electrically connected to the branch circuit breaker and the electric wire drawing power from the charger bus bar, (20).

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