KR20200000643U - Supporting device for bus bar - Google Patents

Abstract

The present invention relates to a busbar support device, which supports a plurality of busbars on one side, but includes a plurality of lower clamps arranged along the longitudinal direction of the busbars; A plurality of upper clamps supporting the plurality of busbars on the other side but disposed to face the lower clamps along the longitudinal direction of the busbars; A plurality of fastening members for mutually coupling the upper clamp and the lower clamp; And a plurality of support blocks inserted between the upper clamp and the lower clamp and disposed between the busbars.
According to the present invention, by providing a reinforcing structure that supports the compression force applied to the clamp, it is possible to prevent damage to the clamp and stably support the busbar.

Description

Supporting device for bus bar

The present invention relates to a busbar support device with improved bonding stability and support by reinforcing the support structure.

In general, the switchboard is a power device installed in each power camp to monitor and control the distribution system. In addition, the switchboard is provided with a switch, a circuit breaker, an instrument, and the like for distribution and opening and closing of electricity, safety, and weighing. The switchboard is divided into a high-voltage switchboard connected to the primary side of the main transformer and a low-voltage switchboard connected to the secondary side according to the power used.

The low voltage switchboard is equipped with a bus bar, which is a main circuit for power transmission. Busbars are made of copper or aluminum conductors. The busbar is a bar shape of a rectangular parallelepiped having a predetermined thickness and length. The busbar is supported on the frame of the switchboard by means of an insulator or clamping device. The insulator is made of an insulating material such as epoxy, and the clamping device is made of an insulating material such as polyester or glass fiber.

Hereinafter, a conventional busbar support structure will be described with reference to the drawings.

1 is a perspective view showing a conventional busbar support device. FIG. 2 is a front view showing a detailed structure of the busbar support device according to FIG. 1.

1 and 2, the conventional clamp 10 is installed on the frame of the switchboard to support a plurality of busbars 30. The clamp 10 is provided in a pair, and is composed of a bolt 16 and a nut 18.

The clamp 10 is formed with a plurality of three grooves into which the busbar 30 is inserted along the longitudinal direction. The busbar 30 is first fixed to the upper and lower sides in the longitudinal direction by the clamp 10. After that, the upper and lower clamps 10 are connected by bolts 16 to fix and support the busbar 30 second.

Generally, when a current greater than or equal to a short-time withstand current occurs, a repulsive force is generated between the busbars 30. This repulsive force causes the busbar 30 to bend.

When the busbar 30 is inserted into the groove 12 of the clamp 10 and bent in a fixed state, compressive force is applied to both sides of the protrusion 14 constituting the groove 12 of the clamp 10. However, the clamp 10 is formed of an insulating material such as polyester or glass fiber, as described above. Therefore, since the strength of the busbar 30 is lower than that of the busbar 30 made of a metal material, when the busbar 30 is deformed, the protrusion 14 of the clamp 10 may not overcome the above-described compressive force and may crack or break.

In order to secure the reliability of the low-voltage switchboard, the clamp 10 must be able to withstand the short-time current without damage even if the busbar 30 is bent in a short-time current generation situation. However, as described above, if the clamp 10 is damaged, the cost of the clamp 10 needs to be replaced, and the short circuit of the busbar 30 may occur, so that the reliability of the switchboard cannot be secured.

To solve this, a bolt that couples the clamp 10 can be added, but this is a major cause of cost increase. Therefore, measures are needed to reduce the cost while maintaining the reliability of the busbar support structure.

The object of the present invention is to provide a busbar support device with improved bonding stability and support by reinforcing the support structure.

The objects of the present invention are not limited to the above-mentioned purposes, and other objects and advantages of the present invention not mentioned may be understood by the following description, and will be more clearly understood by embodiments of the present invention. In addition, it will be readily appreciated that the objects and advantages of the present invention can be realized by means of the appended claims and combinations thereof.

A busbar support device according to the present invention includes a plurality of lower clamps supporting a plurality of busbars at one side, but arranged along the length direction of the busbars; A plurality of upper clamps supporting the plurality of busbars on the other side, but facing the lower clamps along the longitudinal direction of the busbars; A plurality of fastening members for mutually coupling the upper clamp and the lower clamp; And a plurality of support blocks inserted between the upper clamp and the lower clamp and disposed between the busbars.

The upper clamp and the lower clamp are recessed on one surface and include a plurality of conductor insertion grooves into which the busbar is inserted, and a plurality of support protrusions formed between the conductor insertion grooves and protruding from the one surface.

The support block is characterized in that one end is inserted into the support projection of the lower clamp, and the other end extends toward the support projection of the upper clamp.

The support block is characterized in that one end is inserted into the support protrusion of the lower clamp and the other end is spaced apart from the support protrusion of the upper clamp.

The support block is characterized in that an insertion groove having a shape corresponding to the support projection of the lower clamp is formed at one end and is installed in a form surrounding the support projection of the lower clamp.

The upper clamp, the lower clamp, and the support block are made of an insulating material.

The busbar support device according to the present invention is provided with a reinforcing structure that supports the compressive force applied to the clamp, thereby preventing damage to the clamp and stably supporting the busbar.

In addition to the above-described effects, the concrete effects of the present invention will be described together while explaining the specific matters for carrying out the invention.

1 is a perspective view showing a conventional busbar support device.
2 is a front view showing a detailed structure of the busbar support device according to FIG.
3 is a perspective view showing an installation state of a busbar support device according to an embodiment of the present invention.
4 is a perspective view showing a busbar support device according to an embodiment of the present invention.
5 is a partially exploded perspective view of the busbar support device according to FIG. 4.
6 is a side view of the busbar support device according to FIG. 4.
7 is a front view of the busbar support device according to FIG. 4.

The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, and accordingly, a person skilled in the art to which the present invention pertains can easily implement the technical spirit of the present invention. In describing the present invention, when it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

In the following, the arrangement of any component in the "upper (or lower)" or "upper (or lower)" of the component means that any component is disposed in contact with the upper surface (or lower surface) of the component. In addition, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

Also, when a component is described as being "connected", "coupled" or "connected" to another component, the components may be directly connected to or connected to each other, but other components may be "interposed" between each component. It should be understood that "or, each component may be" connected "," coupled "or" connected "through other components.

3 is a perspective view showing an installation state of a busbar support device according to an embodiment of the present invention. 4 is a perspective view showing a busbar support device according to an embodiment of the present invention. 5 is a partially exploded perspective view of the busbar support device according to FIG. 4. 6 is a side view of the busbar support device according to FIG. 4. 7 is a front view of the busbar support device according to FIG. 4.

3 to 7, the busbar support device 300 according to an embodiment of the present invention is installed on the horizontal frame 110 of the switchboard 100. The busbar support device 300 supports a plurality of busbars 200 in the vertical direction and fixes them in the installation position. Hereinafter, the vertical direction means a direction perpendicular to the longitudinal direction of the busbar 200 (direction perpendicular to the horizontal frame of the switchboard) based on FIG. 3.

Generally, in a medium voltage system, a switchboard is composed of a three-phase (R, S, T) system. However, in the case of the low voltage switchboard, the switchboard is mainly composed of a four-phase (R, S, T, N) system (also composed of a three-phase like the medium voltage switchboard). Hereinafter, description will be made based on a four-phase system.

The busbar 200 is composed of a total of 12 pieces of 3 in one phase for supply of 4 phase (R, S, T, N) current. It is composed of three busbars 200, which are equivalent to one, but it is also possible to implement four phases with two busbars that are equivalent. 3, the busbar 200 is installed through one side from the other side of the switchboard 100. In addition, the busbar 200 is installed on a horizontal frame 110 parallel to the installation surface. The busbar 200 is a bar-shaped conductor having a predetermined length. Therefore, a plurality of busbar support devices 300 support the busbar 200 to prevent bending of the busbar 200 or short circuit between adjacent busbars 200. That is, a plurality of busbar support devices 300 are installed along the longitudinal direction of the busbar 200 to couple the busbar 200 on the horizontal frame 110.

The busbar 200 must be spaced apart from each other so as not to be short-circuited with the neighboring busbar 200. In particular, even if a short-time current or more accident current flows and the busbar 200 is bent, neighboring busbars 200 should not be in contact with each other. Considering this, the busbar support device 300 is made.

4 to 7, the busbar support device 300 includes an upper clamp 310 coupled to the upper side of the plurality of busbars 200 and a lower clamp coupled to the lower side of the plurality of busbars 200. 330, a fastening member 350 for mutually fastening the upper clamp 310 and the lower clamp 330, and a support block 370 inserted between the upper clamp 310 and the lower clamp 330 do. The upper clamp 310, the lower clamp 330, and the support block 370 are made of an insulating material.

The upper clamp 310 and the lower clamp 330 have the same shape. The upper clamp 310 and the lower clamp 330 are installed in a form facing each other with the busbar 200 interposed therebetween, and are fixed by the fastening member 350.

The upper clamp 310 has a block shape having a predetermined thickness. The upper clamp 310 must support a plurality of busbars 200. Therefore, it has a length sufficient to support a predetermined number of busbars 200. A plurality of conductor insertion grooves 312 in which one side of the upper clamp 310 is concavely formed and into which the busbar 200 is inserted, and a plurality of support protrusions disposed between the conductor insertion grooves 312 and protruding from one surface 314 is formed.

The lower clamp 330 has the same shape as the upper clamp 310, and has the same number of conductor insertion grooves 332 and support projections 334.

The fastening member 350 may be composed of a cylindrical connector 352 having a thread formed therein, and a nut 354 having a screw groove formed therein and coupled to the connector 352.

The detailed structures of the upper clamp 310 and the lower clamp 330 are as follows.

For example, as illustrated in FIG. 7, 12 conductor insertion grooves 312 may be formed in one upper clamp 310 to allow four sets of busbars 200 to be inserted. Since a set of busbars 200 are inserted into the three conductor insertion grooves 312, three conductor insertion grooves 312 can also be defined as one set (hereinafter, for convenience, three conductor insertion grooves, one set) Is defined and explained as support). A fastening member 350 may be inserted between the plurality of conductor insertion groove 312 sets, respectively. That is, three conductor insertion grooves 312 and fastening members 350 are alternately arranged in the upper clamp 310. Based on FIG. 7, 12 conductor inserting grooves 312 are provided, and five fastening members 350 may be fastened.

Since the above-described conductor insertion groove 312 is a portion in which one side in the width direction of the busbar 200 is inserted, it is formed to have a width corresponding to the width of the busbar 200. In addition, the interval between the support portion supporting the four-phase busbar 200 and the adjacent support portion may be determined in consideration of a short-time current.

Short-time withstand currnet means the limit of current that can flow through the energized part of the switchgear for a specified period of time under specified conditions. In general, when a current corresponding to a short-time current is applied to the busbar 200, a repulsive force is generated between the busbars 200. As the repulsive force increases, the degree of deflection of the busbar 200 increases, so it is necessary to support the busbar 200 to minimize bending of the busbar 200. Therefore, the distance between the supports can be shortened under high short-time current conditions, and the distance between the supports can be set relatively long under low-short-time current conditions.

Since three conductor insertion grooves 312 are provided in the support portion, two support protrusions 314 that are protruding portions between the conductor insertion grooves 312 are provided. When a reaction force is generated in the busbar 200 and the busbar 200 is bent, pressure is applied by the busbar 200 in the direction of the arrow in FIG. 7. This pressure is a compressive force that presses the supporting projections 314 from both sides. At this time, the support protrusion 314 is thinner than other parts, and thus may be damaged by compressive force. When the support protrusion 314 is damaged, a short circuit occurs between the busbars 200, so that the support block 370 is inserted to prevent this.

5 to 7, the support block 370 is a separate component inserted between the upper clamp 310 and the lower clamp 330. The support block 370 has a length shorter than the width of the busbar 200 and has a block shape having a predetermined thickness. The support block 370 has a shape in which a groove corresponding to the shape of the support protrusion 314 is formed in a block having a rectangular parallelepiped shape. This groove is an insertion groove 372 into which the supporting projection 334 on the lower clamp 330 is inserted. Both sides of the insertion groove 372 are defined as ribs 374 for convenience.

The support block 370 is inserted between each bus bar 200. Further, the support block 370 is located only on the support projection 334. Therefore, two support blocks 370 are disposed between the three busbars 200. For example, when four sets of busbars 200 composed of three are installed in one set, a total of eight support blocks 370 may be inserted.

Since the support block 370 must be inserted into the lower clamp 330, the width of the support block 370 is formed larger than the width of the lower clamp 330. Therefore, the support block 370 is installed in a form surrounding the support protrusion 334 of the lower clamp 330 as shown in FIG. 6. Accordingly, even when the support block 370 has the insertion groove 372 on only one side, it is possible to maintain the engaged state.

In addition, it is preferable that the support block 370 has a length not affected by the fastening force of the upper clamp 310 and the lower clamp 330.

For example, assuming that the width of the busbar 200 is 100 mm and the height of the support protrusion 314 is 10 mm, the length of the support block 370 (length in the vertical direction based on FIG. 5) may be set to 88 mm. have. In this case, a gap of 2 mm occurs between the upper end of the support block 370 and the support protrusion 314 of the upper clamp 310 as in FIGS. 6 and 7.

When a gap exists between the upper end of the support block 370 and the support protrusion 314 of the upper clamp 310, the support block is caused by excessive fastening force when the upper clamp 310 and the lower clamp 330 are fastened. (370) can be prevented from being damaged.

Even if there is a gap between the support block 370 and the support protrusion 314 of the upper clamp 310, the support block 370 is in the state where the support protrusion 314 of the lower clamp 330 is inserted into the support block 370 It is not arbitrarily separated and can maintain a bond state.

In the busbar support apparatus according to an embodiment of the present invention having the above-described configuration, a brief description of the busbar installation and support process is as follows.

First, a predetermined number of busbars 200 are inserted into the conductor insertion groove 332 of the lower clamp 330. A plurality of lower clamps 330 are provided to support the busbars 200 from the lower side along the length direction of the busbars 200. When the busbar 200 is seated on the lower clamp 330, two support blocks 370 are inserted between the three busbars 200. Support blocks 370 are inserted between the neighboring busbars 200, respectively. Alternatively, the support block 370 may be first seated on the support protrusion 314 of the lower clamp 330 and then the busbar 200 may be inserted into the conductor insertion groove 332.

Then, the upper clamp 310 is disposed above each lower clamp 330, and the conductor insertion groove 312 of the upper clamp 310 is pressed to be inserted into the busbar 200. When the upper clamp 310 and the busbar 200 are connected, the upper clamp 310 and the lower clamp 330 are combined with the fastening member 350.

In this way, the busbar 200 and the busbar support device 300 may be mounted on the horizontal frame 110 of the switchboard 100 in a state where all of the busbar 200 are coupled to the busbar support device 300. .

Alternatively, the busbar 200 may be disposed on the switchboard 100 first, and then the lower clamp 330 and the upper clamp 310 may be combined. Conversely, the lower clamp 330 may be disposed on the switchboard 100 first, and then the busbar 200 and the upper clamp 310 may be combined.

In the above-described embodiment, it has been described as an example that the support block 370 is formed with only one insertion groove 372 in the longitudinal direction. However, insertion grooves 372 may be formed on both sides of the support block 370 in the longitudinal direction. However, in this case, when the upper clamp 310 and the lower clamp 330 are shifted from each other by an external force, the rib 374 that is a thin portion of the support block 370 may be damaged. Therefore, in the present invention, it has been described as a preferred embodiment that the support block 370 has an insertion groove 372 on only one side.

As described above, the present invention has been described with reference to the exemplified drawings, but the present invention is not limited by the examples and drawings disclosed in the present specification, and can be varied by a person skilled in the art within the scope of the technical idea of the present invention. It is obvious that modifications can be made. In addition, although the operation effect according to the configuration of the present invention is not explicitly described while explaining the embodiment of the present invention, it is natural that the predictable effect by the configuration should also be recognized.

100: switchboard 110: horizontal frame
200: busbar 300: busbar support device
310: upper clamp 330: lower clamp
312, 332: conductor insertion groove 314, 334: support projection
350: fastening member 370: support block
372: insertion groove 374: rib

Claims (7)

A plurality of lower clamps which support a plurality of busbars at one side but are arranged along the longitudinal direction of the busbars;
A plurality of upper clamps supporting the plurality of busbars on the other side but disposed to face the lower clamps along the longitudinal direction of the busbars;
A plurality of fastening members for mutually coupling the upper clamp and the lower clamp; And
It is inserted between the upper clamp and the lower clamp, including a plurality of support blocks disposed between the busbar
Busbar support device. According to claim 1,
The upper clamp and the lower clamp
It is formed concave on one surface and includes a plurality of conductor insertion grooves into which the busbar is inserted, and a plurality of support protrusions formed between the conductor insertion grooves and protruding from the one surface.
Busbar support device.
According to claim 2,
The support block
One end is inserted into the support projection of the lower clamp, and the other end extends toward the support projection of the upper clamp
Busbar support device.
According to claim 3,
The support block
In the state where one end is inserted into the support protrusion of the lower clamp, the other end is spaced apart from the support protrusion of the upper clamp.
Busbar support device.
According to claim 4,
The support block
At one end, an insertion groove having a shape corresponding to the supporting projection of the lower clamp is formed to be installed in a form surrounding the supporting projection of the lower clamp.
Busbar support device.
According to claim 3,
The support block
Inserting grooves having a shape corresponding to the supporting projections of the lower clamp are formed at both ends to be installed in a form surrounding the supporting projections of the lower clamp.
Busbar support device.
According to claim 1,
The upper clamp, the lower clamp, and the support block are made of an insulating material.
Busbar support device.

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