KR102272604B1 - Bus bar structure of distribution panel - Google Patents

Abstract

The present invention relates to a busbar structure of a switchboard.
A busbar structure of a switchboard according to the present invention includes: a busbar body connected to a energizing part of a switchgear inside an enclosure of the switchboard; and a support insulator for supporting the bus bar body in the enclosure, wherein the bus bar body includes: a hollow part; and an uneven portion present in the hollow portion or outside the hollow portion.

Description

Bus bar structure of distribution panel

The present invention relates to a busbar structure of a switchboard.

A switchboard is a facility that can manage power transmission and distribution, such as receiving and sending current in a power plant, substation, or building.

In general, various switching devices such as a circuit breaker, a disconnector and a grounding switch are provided inside the enclosure of such a switchboard, and an element that is connected to these various switching devices and constitutes a conduction path of the main current is called a bus bar.

Busbars may have various shapes, such as rectangular, circular, and semicircular cross-sections, depending on the use environment. Busbars having a rectangular cross-section are commonly used due to the characteristics of busbar production and switchboard manufacturing processes.

The cross-sectional area of such a bus bar is closely related to the performance of the bus bar to accommodate a higher rated current, but as the cross-sectional area of the bus bar is increased, the density of the current flowing through the bus bar becomes lower and the resistance of the bus bar becomes smaller. It has the effect of reducing the loss, which in turn lowers the temperature rise. In addition, as the cross-sectional area of the bus bar increases, the volume of forced cooling elements for cooling the bus bar also increases, so there is a problem that the size of the switchboard enclosure is inevitably increased by the increased cross-sectional area of the bus bar and the volume of the cooling elements.

KR 10-2003-0086538 A (2003.11.10)

An object of the present invention is to improve the cooling efficiency of busbars.

Another object of the present invention is to reduce the size of the switchboard and improve the natural cooling efficiency of the busbar.

A busbar structure of a switchboard according to an embodiment of the present invention includes: a busbar body connected to a energizing part of a switching device inside an enclosure of the switchboard; and a support insulator for supporting the bus bar body in the enclosure, wherein the bus bar body includes: a hollow part; and a concave-convex part present in the hollow part or outside the hollow part, wherein the bus bar body includes: a first bus bar body provided inside the enclosure; a second bus bar body spaced apart from the first bus bar body and provided to face the first bus bar body; and a third bus bar body spaced apart from the second bus bar body and provided to face the second bus bar body, wherein the first, second, and third bus bar bodies are in the direction of gravity inside the enclosure. is disposed in a direction perpendicular to, and the concave and convex portions are respectively present outside the hollow portion of the first, second, and third bus bar bodies, and the surfaces of the first and second bus bar bodies facing each other and the second and third bus bar bodies The bus bar body may be present on the facing surface.

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A busbar structure of a switchboard according to another embodiment of the present invention includes: a busbar body connected to a energizing part of a switchgear inside an enclosure of the switchboard; and a support insulator for supporting the bus bar body in the enclosure, wherein the bus bar body includes: a hollow part; and a concave-convex part present in the hollow part or outside the hollow part, wherein the bus bar body includes: a first bus bar body provided inside the enclosure; a second bus bar body spaced apart from the first bus bar body and provided to face the first bus bar body; and a third bus bar body spaced apart from the second bus bar body and provided to face the second bus bar body, wherein the first, second, and third bus bar bodies have gravity in the interior of the enclosure. direction, and the concave and convex portions are respectively present in the hollow portions of the first, second, and third bus bar bodies, and the inner surfaces of the side walls facing the first and second bus bar bodies and the second and third bus bars The body may be present on the inner surface of the opposite sidewall.

The concave-convex portion may include a protruding region protruding from an outer periphery or an inner periphery of the bus bar body.

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In addition, the protruding region may be continuous in the longitudinal direction of the bus bar body.

In addition, a plurality of the protruding areas may be provided, and the plurality of protruding areas may be spaced apart from each other by a predetermined interval.

According to the present invention, it is possible to improve the cooling efficiency of the busbar and the natural cooling efficiency of the busbar.

In addition, the switchgear can be downsized.

1 is a perspective view of a busbar structure of a switchboard according to an embodiment of the present invention.
2 is a perspective view of a busbar structure of a switchboard according to an embodiment of the present invention.
FIG. 3 shows a cross section parallel to the XZ plane of FIG. 2 .
4 is a temperature analysis result of the bus bar body.
5 is a perspective view of a busbar structure of a switchboard according to another embodiment of the present invention.
FIG. 6 shows a cross section parallel to the XY plane of FIG. 5 .
7 is a temperature analysis result of the bus bar body.

In order to help the understanding of the description of the embodiment of the present invention, elements indicated by the same reference numerals in the accompanying drawings are the same elements, and related elements among the elements that perform the same operation in each embodiment are the same or extended numbers. marked.

In addition, in order to clarify the gist of the present invention, descriptions of elements and techniques well known by the prior art will be omitted, and below, the present invention will be described in detail with reference to the accompanying drawings.

However, the spirit of the present invention is not limited to the presented embodiment, and specific elements may be proposed in other forms with addition, change, or deletion by those skilled in the art, but this is also included within the scope of the same spirit as the present invention. make it clear

The X-axis direction shown in the accompanying drawings is the longitudinal direction of the enclosure of the switchboard, the Y-axis direction is the width direction of the enclosure, and the Z-axis direction is the height direction of the enclosure.

As shown in FIG. 1 , the bus bar structure 100 of the switchboard may include a bus bar body 110 arranged in a horizontal or vertical direction and a support insulator 120 for supporting or fixing the bus bar body 110 . In addition, a plurality of bus bar bodies 110 may be provided to correspond to the R, S, and T phases, respectively.

As shown in FIG. 2 , the bus bar structure of the switchboard according to an embodiment of the present invention has a bus bar body 110 connected to the energizing part (not shown) of various switching devices (not shown) inside the enclosure forming the outer shape of the switchboard. ) and a support insulator for supporting the bus bar body 110 in the enclosure.

The bus bar body 110 may be disposed parallel to the Y-axis direction inside the enclosure 101 , and a plurality of bus bar bodies may be provided.

In more detail, the bus bar body 110 is a first bus bar body 113 disposed in parallel to the Y-axis direction inside the enclosure 101, and is spaced apart from the first bus bar body 113 by a predetermined distance. A second bus bar body 114 disposed parallel to the axial direction and provided to face the first bus bar body 113 and a predetermined distance apart from the second bus bar body 114 in parallel to the Y-axis direction It may include a third bus bar body 115 disposed to face the second bus bar body 114 .

At least one side of the first bus bar body 113 and the second bus bar body 114 faces each other, and the second bus bar body 114 and the third bus bar body 115 have at least one side. These are placed facing each other.

At this time, the first, second, and third bus bar bodies 113, 114, and 115 each include a hollow portion 111 provided as a through hole, and the first, second, and third bus bar bodies 113, 114, and 115 are outer periphery and hollow. An uneven portion 112 may be provided outside the portion 111 .

The concave and convex portions 112 are respectively provided on surfaces where the first bus bar body 113 and the second bus bar body 114 face each other, and the second bus bar body 114 and the third bus bar body 114 are respectively provided. The body 115 may be provided on surfaces facing each other.

In addition, the first bus bar body 113 and the third bus bar body 115 present at both edges may be provided with concave-convex portions 112 on the surface facing the enclosure 101 .

The first, second, and third bus bar bodies are all arranged in a direction parallel to the Y-axis direction, and the Y-axis direction may be a direction perpendicular to the direction of gravity.

Accordingly, the first, second, and third bus bar bodies may be disposed in a direction perpendicular to the direction of gravity inside the enclosure 101 of the switchboard.

3 is a view showing a cross section in a direction parallel to the X-Z plane of FIG. 2 .

As shown in FIG. 3 , the uneven portion ( 112 in FIG. 2 ) according to an embodiment of the present invention may include a protruding region 116 protruding from the outer periphery 110a of the bus bar body.

The protrusion region 116 may exist for a certain period along the outer periphery of the bus bar body, and a plurality of protrusions may be provided.

In addition, the plurality of protrusion regions 116 may be spaced apart from each other by a predetermined distance to have a predetermined amount of spaced distance 117 .

As such, the concave-convex portion 112 may be formed on the outer periphery of the bus bar body by the plurality of protruding regions 116 spaced apart from each other by a predetermined distance.

The protrusion region 116 may be continuously provided for a certain section in a direction parallel to the Y-axis direction, and may exist on the bus bar body in a direction parallel to the Y-axis direction. In addition, the protrusion region 116 may be continuously arranged for a predetermined section in the longitudinal direction of the bus bar body.

This serves to guide the cooling fluid (or outside air) to flow smoothly along the longitudinal direction of the bus bar body, and can contribute to uniform cooling of the entire bus bar body.

In FIG. 4A, as shown in FIGS. 2 and 3, a plurality of busbar bodies are arranged in a horizontal direction, that is, a direction perpendicular to the direction of gravity, and irregularities 112 are formed on the outer periphery of the busbar body. A temperature analysis result is shown in this case, and in FIG. 4(b), a plurality of busbar bodies are arranged in a horizontal direction, that is, a direction perpendicular to a direction of gravity, and irregularities are formed on the inner periphery of the busbar body (110b in FIG. 3). The temperature analysis result when the part 112 is formed is shown.

Comparing FIGS. 4 (a) and 4 (b), it can be seen that the temperature is lower when the concave-convex portions 112 are formed on the outer periphery of the plurality of bus bar bodies (110a in FIG. 3) compared to the case where the concave-convex portions 112 are not formed. can

Therefore, when a plurality of bus bar bodies are arranged in a direction perpendicular to the direction of gravity, the temperature rise of the bus bar body can be suppressed by forming the concave-convex portions 112 on at least surfaces facing each other.

This is because the plurality of protruding areas 116 shown in FIG. 3 serves to increase the area in which the bus bar body can come into contact with the cooling fluid (or outside air), and the natural cooling efficiency of the bus bar body can be improved, and , it is possible to improve the cooling efficiency of the bus bar body without adding a separate cooling element.

Meanwhile, as shown in FIG. 5 , a plurality of bus bar bodies according to another embodiment of the present invention may be disposed in a direction parallel to the Z-axis direction inside the enclosure 101 .

The plurality of bus bar bodies have a first bus bar body 113 provided on one side of the enclosure 101 , and at least one surface facing the first bus bar body 113 , the first bus bar body 113 . A second bus bar body 114 spaced apart from the second bus bar body 114 and a third bus bar body 115 spaced a certain distance from the second bus bar body 114 and having at least one surface facing the second bus bar body 114 ) may be included.

In addition, the first, second, and third bus bar bodies 113, 114, and 115 may be disposed in a direction parallel to the direction of gravity.

The first, second, and third bus bar bodies may each include a hollow portion 111 , and concave-convex portions 112 may be provided on inner periphery of the first, second, and third bus bar bodies 113 , 114 and 115 , respectively.

As the concave-convex portion 112 is present on the inner periphery of the first, second, and third bus bar bodies 113 , 114 , and 115 , the concave-convex portion 112 may be positioned in the hollow portion 111 .

In addition, the concave-convex portion 112 may exist at a position where the first, second, and third bus bar bodies 113 , 114 , and 115 face each other.

When an inlet 118 is present at one end of the first, second, and third bus bar bodies 113, 114, and 115 and an outlet 119 is provided at the other end of the first, second, and third bus bar bodies 113, 114 and 115, When the concave-convex portion 112 is provided on the inner periphery, the hot fluid can be easily discharged through the inlet of the bus bar body according to the principle that hot air rises upward, thereby reducing the calorific value of the bus bar body, which in turn cools the bus bar body. It can contribute to improving efficiency.

In addition, the rate at which the cooling fluid (or outside air) is introduced into the inlet by gravity and discharged to the outlet may be increased, which improves the cooling rate and cooling efficiency.

As shown in FIG. 6 , when the bus bar body is disposed in the gravitational direction, an uneven portion ( 112 in FIG. 5 ) may be provided on the inner periphery 110b of the bus bar body. In addition, the concave-convex portions ( 112 in FIG. 5 ) may be continuously provided in a direction parallel to the longitudinal direction of the bus bar body.

In addition, the concave-convex portion may include a plurality of protruding regions 116 protruding a predetermined length in the direction of the hollow portion 111 from the inner periphery of the bus bar body.

The plurality of protrusion regions 116 may have a predetermined amount of separation distance 117 .

According to this, the flow of the cooling fluid (or outside air) can be guided inside the bus bar body, and the contact area between the bus bar body and the cooling fluid (or outside air) inside the bus bar body is increased to increase the cooling efficiency of the bus bar body. can be improved

7(a) shows the temperature analysis result when the concave-convex portion (112 of FIG. 5) is formed on the inner periphery (110b of FIG. 6) of the bus bar body while the bus bar body is disposed in the direction of gravity, and FIG. Figure (b) shows the temperature analysis result when the concave-convex portion is formed on the outer periphery of the bus bar body (110a in FIG. 6) while the bus bar body is disposed in the direction of gravity.

Comparing (a) and (b) of FIG. 7 , it can be seen that the temperature of the bus bar body is lower when the bus bar body is disposed in the gravity direction and the concave-convex portion is formed on the inner periphery of the bus bar body.

The above has been described with respect to one embodiment of the present invention, the scope of the present invention is not limited thereto, and various modifications and variations are possible within the scope without departing from the technical spirit of the present invention described in the claims. It will be apparent to one of ordinary skill in the art.

101: enclosure 110: bus bar body
111: hollow part 112: uneven part
113: first bus bar body 114: second bus bar body
115: third bus bar body 116: protruding area
120: supporter

Claims (8)

a bus bar body connected to the energizing part of the switching device in the enclosure of the switchboard; and
A support insulator for supporting the bus bar body in the enclosure
including,
The bus bar body,
hollow part; and
Concave-convex portions present in the hollow portion or outside the hollow portion
includes,
The bus bar body,
a first bus bar body provided inside the enclosure;
a second bus bar body spaced apart from the first bus bar body and provided to face the first bus bar body; and
A third bus bar body spaced apart from the second bus bar body and provided to face the second bus bar body
including,
The first, second, and third bus bar bodies are disposed in a direction perpendicular to the direction of gravity inside the enclosure,
The concave and convex portions are respectively present outside the hollow portion of the first, second, and third bus bar bodies, and are located on the surfaces facing the first and second bus bar bodies and the surfaces facing the second and third bus bar bodies. Busbar structure of the existing switchboard.
delete delete a bus bar body connected to the energizing part of the switching device in the inside of the switchboard enclosure; and
A support insulator for supporting the bus bar body in the enclosure
including,
The bus bar body,
hollow part; and
Concave-convex portions present in the hollow portion or outside the hollow portion
includes,
The bus bar body,
a first bus bar body provided inside the enclosure;
a second bus bar body spaced apart from the first bus bar body and provided to face the first bus bar body; and
and a third bus bar body spaced apart from the second bus bar body and provided to face the second bus bar body;
The first, second, and third bus bar bodies are disposed in the gravitational direction inside the enclosure,
The concave and convex portions are present in the hollow portions of the first, second, and third bus bar bodies, respectively, and the inner surface of the side wall facing the first and second bus bar bodies and the side wall facing the second and third bus bar bodies The busbar structure of the switchboard that exists on the inner surface of the
delete 5. The method of claim 1 or 4,
The busbar structure of the switchboard, characterized in that the uneven portion includes a protruding region protruding from the busbar body.
7. The method of claim 6,
The protruding area is
A busbar structure of a switchboard, characterized in that it is continuous in the longitudinal direction of the busbar body.
7. The method of claim 6,
The protrusion area is provided in plurality,
A busbar structure of a switchboard, characterized in that the plurality of protruding areas are spaced apart from each other by a predetermined interval.

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