KR20180125651A - Busduct system - Google Patents

Abstract

The present invention relates to a bus duct system using a molding material to insulate a bus duct bar, and a bus duct system using an air-insulated type for separating a bus duct bar as a bare conductor in a duct. The bus duct system includes a plurality of bus bars, a plurality of molding part, and a duct.

Description

Booth duct system {BUSDUCT SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a booth duct system, and more particularly, to a booth duct system in which a molding material is used to insulate a booth bar and an air-isolating booth duct The present invention relates to a booth duct system employing the advantages of the system.

Generally, cables have been used as a medium for transferring electrical energy. Recently, bus ducts have been used as a substitute for cables. The bus duct is equipped with a bus bar that acts as a conductor core included in the cable and has the advantage of energizing a large amount of current.

Originally, wiring by electric wire cables has been widely used in power wiring. However, in wiring of high-rise buildings and large-scale factories, when wiring by a bus duct having a bus bar is gradually adopted Is increasing.

These booth ducts and cables have commonality in that they have conductors and insulators, but cables use vinyl or rubber to protect or insulate conductors, but booth ducts carry large amounts of current through the conductors, making them difficult to protect directly as insulators There is a difference in that the insulator is coated on the bus bar and the bus bar is embedded in the metal duct.

These booth ducts are easy to install, enlarge and install on complicated wiring paths, and can be quickly recovered due to easy handling in the event of an abnormality or an accident on the power wiring of the busbar. Therefore, it is widely used .

Moreover, since the electricity supply system of the current building requires energy of large and diverse capacity as compared to the past, the use of bus ducts which are safe and have low energy loss is rapidly increasing in accordance with this trend.

For example, booth ducts can be used in a variety of industries such as factories, buildings, apartments, large discount marts, officetels, research complexes, department stores, golf courses, tunnels, semiconductors and LCD factories, chemicals, refineries, steel mills, high-rise buildings, And so on.

Since a large current flows through a bus bar provided in a booth duct, the booth duct including the boom bar is manufactured as a unit having a predetermined length and then installed And it is connected according to the facilities and distribution design.

Such a booth duct may be provided to accommodate three-phase busbars in the duct, and each of the busbars must be mutually insulated so that they can be spaced apart and accommodated within the busbust. Also, since the distance between the phases needs to be increased as the voltage of the power supplied through the bus duct increases, the spacing distance may be increased depending on the voltage. Therefore, the size of the bus duct may be determined depending on the voltage of the supplied power.

Here, the cross-sectional area of each bus bar and the like can be determined so as to satisfy the required heat-generating condition depending on the magnitude of the voltage or current of the power supplied through the bus duct. For example, according to the IEC60694 standard for the MV class booth duct system, since the maximum temperature rise width at the surface of the bus duct is required to be 65K or less, the cross sectional area of each bus bar And improve the heat dissipation performance of the booth duct itself.

As a method for inserting the bus bars of each phase in the bus duct, a method of separating the bus bars of the bus bar type from each other may be used, or a method of molding each bus bar into a molding material such as epoxy may be used.

In the air insulated method, when the voltage of the bus bar is increased, the separation distance must be increased to increase the size of the duct.

Particularly, the method of molding each bus bar with a molding material such as epoxy is an insulation method used when the booth duct is manufactured so as to satisfy waterproof and dustproof conditions such as IP68.

Also, in the case of a booth duct manufactured to satisfy the waterproof and dustproof conditions such as IP68, since the connecting portion between the bus ducts is also connected after the connecting portion is wrapped by the flask and the inside is molded, the installation work of the booth duct is not easy, It is not easy to determine whether or not the molding of the mold is completed.

In recent years, compactness, low cost, and ease of installation of a bus duct have been sought. For this purpose, the heat dissipation performance of the bus bar must be improved, and a costly conductor such as copper should be replaced with a low-cost conductor, and a new type of bus duct which does not mold the connection part is required.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a booth duct system, and more particularly, to a booth duct system using a molding material to insulate a booth bar and a booth duct system using an air-insulated booth duct system The present invention provides a booth duct system employing a booth duct system.

According to an aspect of the present invention, there is provided a bus duct system including a plurality of unit bus ducts and a connecting portion for connecting the plurality of unit bus ducts, wherein the unit bus ducts include a plurality of bus bars, And a duct for enclosing a plurality of bus bars surrounding the plurality of bus bars and including a plurality of molding parts formed by the molds and a plurality of bus bars provided with the molding parts, And the ducts are connected to each other in a state of being connected to each other.

The bus bar may be made of aluminum or an aluminum alloy.

In this case, the molding part may be constituted by mixing 70:30 to 80:20 filler in epoxy and adding a curing agent.

Further, a separate cover member may be mounted on the open portion of the connection portion that is not covered by the duct.

Here, a vent hole may be provided on the side surface of the duct so as to be inclined downward.

The duct may include an upper panel provided on an upper portion of the bus bar, a lower panel provided below the bus bar, and a pair of side panels provided on a side surface of the bus bar, .

Here, the upper panel and the lower panel may be provided with vent holes.

When the length of the side panels is longer than that of the upper panel or the lower panel and two unit bus ducts are connected to each other, And a cover member can be mounted on the upper and lower portions of the connection portion.

In this case, the booth bar of the unit booth duct is provided at one side of the molding part, and at least one molding supporting part, which is integrally formed when the molding part is formed and supports the molding part, .

The mold frame may further include a plurality of base frames provided at one side of the molding support portion and crossing the molding portions to be coupled with the molding support portion and the bottom panel.

The spacing distance between the bus bars and the bus bars and the facing connecting conductors at the connecting portions is a minimum spacing distance satisfying the inter-phase insulation in the stator, and the distance between the molding portions in the duct Can be determined.

According to another aspect of the present invention, there is provided a plasma display panel comprising: a plurality of bus bars arranged in parallel to each other; A duct accommodating the plurality of bus bars; And at least one connection portion in which the plurality of bus bars and the plurality of ducts are connected at a predetermined interval, wherein the plurality of bus bars are insulated by air with a molding insulation portion in which molding is added and insulated, Air insulation sections may alternately be repeatedly provided along the respective longitudinal directions.

In this case, the air insulation section may be disposed at a position corresponding to the connection section.

Further, a separate cover member may be mounted on the exposed region without being shielded by the duct.

Here, the separation distance of the plurality of bus bars may be a minimum distance satisfying the inter-phase insulation in the air insulation section.

Since the booth duct of the present invention is provided with the molding part by adding the molding to the booth bar provided in the duct, the heat radiation performance due to the expansion of the heat radiation area can be improved. Therefore, compared with the method in which the molding part is not provided, Can be reduced.

Further, according to the bus duct of the present invention, since the molding portion is added by molding the bus bar, the rigidity of the bus bar can be reinforced, so that the conventional copper bus bar conductor can be replaced with aluminum or the like.

Further, according to the booth duct of the present invention, since the connecting portion is not molded separately, molding is not required in the field, so that the construction can be simplified and the maintenance of the connecting portion can be improved.

1 shows a perspective view of a booth duct constituting an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing a state in which ducts of a booth duct constituting an embodiment of the present invention are separated.
3 is a perspective view showing the configuration of a molding part, a molding supporting part, and a base frame of a bus duct constituting an embodiment of the present invention.
FIG. 4 is a side view showing a configuration of a molding part, a molding supporting part, and a base frame of a booth duct constituting an embodiment of the present invention.
Figure 5 shows a cross-sectional view taken along line A-A 'in Figure 4;
6 is a plan view of a bus duct system in a state where a pair of bus ducts of the present invention are connected.
FIG. 7 illustrates a process of mounting the cover member to the bus duct system shown in FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like reference numerals designate like elements throughout the specification.

FIG. 1 is a perspective view of a unit booth duct 100 constituting an embodiment of the present invention. FIG. 2 is an exploded perspective view showing a state in which a duct of a unit booth duct 100, which constitutes an embodiment of the present invention, And FIG. 3 is a perspective view showing a molding part, a molding supporting part, and a base frame of the unit bus duct 100 constituting an embodiment of the present invention. FIG. 4 is a side view showing a molding part, a molding supporting part and a base frame of a unit bus duct 100 constituting an embodiment of the present invention, FIG. 5 is a sectional view taken along the line A-A ' 6 is a plan view of a booth duct system in which a pair of booth ducts according to the present invention are connected, and FIG. 7 is a view illustrating a process of mounting a cover member to the booth duct system shown in FIG.

1 to 7, a booth duct system 1 according to an embodiment of the present invention includes a plurality of unit booth ducts 100 and a plurality of connection units 200 for connecting the plurality of unit booth ducts 100 The unit bus duct 100 includes a plurality of bus bars 21 made of a conductor, a plurality of bus bars 21 surrounding the bus bar bars 21, And a duct 60 for receiving therein a plurality of booth bars 21 having a molding part 23 and the molding part 23. The connection part 200 is formed by connecting the unit booth duct 100 And the bus bars (21) constituting the bus bars (21) are connected to each other in a state of being connected to each other.

1 and 2, the booth duct 100 of the present invention may have a structure in which a plurality of booth bars 21 are arranged in parallel, and the duct 60 surrounds the exterior thereof.

Each of the bus bars 21 is formed in a flat conductor shape and the molding part 23 is enclosed in both of the bus bars 21 and is accommodated in the duct 60 in parallel with a predetermined distance.

1 and 2, the duct 60 includes an upper panel 62 provided at an upper portion thereof, a lower panel 64 provided at a lower portion thereof, and a plurality of side panels 66 provided at a side surface thereof Thereby forming a constant internal space.

The upper panel 62, the lower panel 64, and the side panel 66 may be coupled by various methods such as bolting, riveting, bonding or welding.

The duct (60) may have at least one vent hole (69) communicating with the outside air. As shown in FIGS. 1 and 2, a plurality of vent holes 69 are formed in the side panels 66 constituting the duct 60, respectively. In this case, the vent hole formed in the side panel 66 may be formed in the form of a ventilation hole inclined downward so that rainwater or the like hardly penetrates in the case of rain (69).

The booth bar 21 is enclosed by the molding part 23 to ensure insulation, waterproof and dustproof functions so that it is possible to form a vent hole 69 through which the outside air can communicate with the duct 60, A vent hole 69 is formed in the duct 60 so that the outside air is introduced and the moist air is discharged to prevent or mitigate the dew condensation inside the duct 60. In addition, by the method of forming the vent hole 69, dew condensation inside the duct can be prevented, and heat generated from the bus bar 21 can be externally discharged. Therefore, the stability and reliability of the product can be secured .

However, vent holes are not formed in the upper panel 62, the lower panel 64 and the cover member c, which constitute the duct 60.

Unlike conventional booth ducts of the molding type, the booth bars 21 are connected to each other without molding the connection portion 200, so that rainwater or the like flows into the connection portion 200 and the like, A vent hole may not be formed in the upper panel 62, the lower panel 64 and the cover member c described later. Concretely, in the case of a conventional bus-duct having a bus bar in the form of a hollow body by an air-insulating method, a vent hole can not be formed in the bottom panel other than the top panel in the case where a rating of about IP54 or IP53 is required.

1 to 3, the booth bar may be configured such that the molding part 23 is individually wrapped around each of the bus bars 21. In this case, The molding part 23 may be formed by disposing a bus bar 21 on a flask (not shown) and then injecting insulating resin for casting to cure it. The insulating resin for a mold may be epoxy, for example.

The molding part 23 and the molding support part 40 to be described later can be integrally formed by injecting the insulating resin for casting into the flask.

The molding part 23 performs both the protection and the insulation of the bus bar 21, thereby enhancing the stability of the power supply, and can achieve the waterproof and dustproof performance basically.

The molding part 23 and the molding support part 40 to be described later are integrally formed by injecting an insulating resin for a mold into a single flask. An epoxy resin, for example, can be applied as the insulating resin for the mold.

The epoxy included in the molding part 23 may be composed of a mixture of a base and a curing agent to promote curing. The mixing ratio of the base and the curing agent may be 100: 25 to 100: 35.

If the mixing ratio of the curing agent is less than 100: 25, the curing of the molding part 23 takes a long time. When the mixing ratio of the curing agent is more than 100: 35, the curing quality may be lowered. The molding portion 23 is formed within the range of 100: 25 to 100: 35.

At this time, the dielectric breakdown voltage of the molding part 23 is greater than 24 kV / mm to ensure safety. The tensile strength of the molding part 23 is 25 N / mm ² to 35 N / mm ² , Typically about 30 N / mm < ^{2 >} Is preferable.

When forming the molding part 23, various kinds of fillers other than the epoxy may be mixed together. The filler may include at least one of a coarse ground sand, a fine ground sand, a fine silica powder, a chalk, and a micro glass ball. In general, the five fillers may be mixed together at an appropriate ratio have.

At this time, the epoxy and filler can be kept in a constant quality by inputting predetermined quantities through automatic weighing.

Meanwhile, the mixing ratio of the filler and epoxy contained in the molding part 23 is in the range of 70:30 to 80:20. When the mixing ratio of the filler is less than 70: 30, the specific gravity of the epoxy increases and the manufacturing cost increases. If the mixing ratio is larger than 80:20, the curing quality is deteriorated and the mechanical strength and insulation performance of the molding part 23 decrease. Therefore, it is preferable that the mixing ratio of the filler and epoxy is determined in the range of 70:30 to 80:20.

Among the fillers, the coarse ground sand has a PH value of 5.3 to 9.3 and a specific gravity of 0.78 to 1.78, and the water content should be 0.03% or less. In the case of the fine ground sand, the PH value is 4.8 to 8.8 and the specific gravity is 1.09 to 2.09. The water content should be maintained at 0.05% or less.

When the filler comprises fine silica powder, the fine silica powder has a PH value of 5 to 8 and a specific gravity of 1.6 to 3.6. At this time, the Mohs hardness of the fine silica powder should be 7 or more and the water content should be kept at 0.1% or less, and the average particle size is preferably 10um to 15um.

When the filler includes chalk, the pH value of the chalk is in the range of 6.8 to 10.8. At this time, the Mohs hardness of the chalk should be not less than 7, the water content should be kept not more than 0.35%, and the average particle size is preferably from 9 to 13 um. And the whiteness of the chalk, that is, whiteness, is 90% to 94%. The chalk may be replaced by a microdol.

When the filler includes a micro glass ball, the specific gravity of the micro glass ball is in the range of 1.5 to 3.5. Here, the whiteness of the micro glass ball should be maintained at 90% to 94% and the moisture content thereof should be maintained at 0.1% or less.

Filler: Epoxy (76: 24) subject 0.17700 Hardener 0.06300 coarse ground sand 0.23800 fine ground sand 0.25000 find silica powder 0.14000 chalk or microdol 0.04200 마이크로 유리 볼 0.09000 system 1.0000

Table 1 is an example of actual application mixing ratio of the main constitution of the molding part 23 described above. Of course, the ratio of the filler to the epoxy is not limited to the above-mentioned 76:24, but can be applied, for example, to 75:25. That is, it is possible to carry out the modification within the range of 70:30 to 80:20 as described above.

In addition to the epoxy and filler mentioned above, the molding part 23 may be mixed with pigments so as to match the surrounding color during installation.

The booth duct 100 is manufactured as a unit having a maximum length of 3.5 m including the booth bar 21, the molding part 23 and the duct 60, and then the connecting part (not shown) Which can be implemented as a distribution facility.

The configuration of the bus bar 21 may be variously configured depending on the installation target of the bus duct 100, the installation environment, the power capacity to be supplied, and the like. For example, the bus bar 21 may have three phases of R, S, and T as shown in FIGS. However, the present invention is not limited to this, and it is also possible to use four bus bars 21 of R, S, T and N, four bus bars 21, or five bus bars 21 consisting of R, S, It is possible.

A plurality of booth bars 21 capable of supplying electric power are provided in the booth duct 100. The booth bar 21 may be made of a metal material such as copper or aluminum. When the conductor of the bus bar 21 is made of copper, a material having a conductivity of 99% or more is used, and when it is made of aluminum, a conductivity of 61% or more can be used.

Copper has a disadvantage that its rigidity is excellent and its conductivity is good, but its price is higher than that of aluminum.

Generally, air-insulated bus-ducts are constructed in the form of a bus-bar conductor, and the bus-bar in the form of a busbar is sufficiently spaced inside the duct 60 to use air as an insulating material.

Particularly, in the case of a bus duct using an air insulated type air conductor, in order to prevent deformation of a conductor due to a problem of deformation of a conductor due to an accident current during an accident such as a short circuit or deformation of a conductor due to elongation and contraction of a conductor, Since it should have its own rigidity, mainly copper or copper alloy conductors are used. However, since the bus bar constituting the bus duct 100 of the present invention is provided with the molding portion 23 outside the conductor, deformation of the conductor due to the short-circuit fault current can be prevented or alleviated, The stiffness of the conductor constituting the bus bar 21 is reinforced by the stiffness reinforcing effect by the own stiffness, and the above-mentioned problem can be minimized. Therefore, the conductor of the unit bus duct 100 of the present invention can be made of aluminum or aluminum alloy, which is inexpensive.

Of course, the bus bar conductor of the bus duct of the present invention, which combines the advantages of the air insulation method and the molding method, may be made of aluminum or an aluminum alloy material, but it may be made of a copper material of good rigidity and electrical conductivity. The required cross-sectional area of the conductor can be further reduced.

In addition, when the molding portion 23 is provided outside the conductors of the bus bar 21, the heat dissipation performance is improved as compared with the case where the same size of conductor is used. This means that heat generated from the conductor is conducted to the molding part 23 to increase the heat dissipation area, which means that the cross-sectional area of the conductor of the bus bar can be reduced even if the same amount of power and the conductor surface temperature standard are satisfied.

That is, assuming that a molding part is added to a conductor having the same cross-sectional area, and if the molding part is not added to the conductor having the same cross-sectional area, even if heat is generated in the case of electrons, the heat is easily dissipated by the molding part. Can be kept low.

This, in turn, means that the same duct surface temperature specification is met and the cross-sectional area of the conductor can be further reduced when the same power is transmitted, provided that the molding part is provided.

Generally, 3.3 kV to 24 kV is classified into a medium voltage (MV), that is, a high voltage, and a voltage lower than that is classified into a low voltage (LV), that is, a low voltage. In the case of high pressure, it is necessary to maintain the distance between the phases, that is, the distance between the bus bars 21 larger than the low pressure, sufficiently.

Therefore, the booth duct 100 of the present invention has a structure in which the outside of each bus bar 21 is surrounded by a molding part 23 integrally formed by a mold. As shown in FIGS. 1 to 3, (23) are spaced apart from each other by a predetermined distance.

At least one molding supporting part 40 formed integrally with the molding part 23 and supporting the molding part 23 may be provided at the lower part of the molding part 23. The molding support part 40 may have a shape in which a part of the molding part 23 is extended downward by a certain length.

The molding support part 40 is integrally formed when the molding part 23 is formed in order to fix the respective booth bars to the lower panel, and at least one molding supporting part for supporting the molding part is provided in one molding part 23 A dog may be provided spaced apart.

4, the molding support portion 40 of the booth bar of the booth duct 100 of the present invention is formed in one molding portion 23 along the longitudinal direction thereof. However, the present invention is not limited thereto, The number of the molding supporting portions 40 can be increased or decreased according to the length of the molding portion 23, installation environment, and the like.

The molding support part 40 may be integrally formed with the molding part 23. [ The shape of the molding support part 40 may be also applied to the mold frame for injecting the molding part 23 so that the molding support part 40 as well as the molding part 23 may be formed together. Therefore, if the insulating resin for casting is injected after the booth bar 21 is disposed in the flask, the molding part 23 and the molding support part 40 can be hardened together and formed integrally.

The width of the molding support portion 40 may be 90% to 110% of the width of the molding portion 23. [

5, the width of the molding support portion 40 is preferably the same as the width of the molding portion 23, but the width of the molding support portion 40 may be increased or decreased as necessary . However, if the width of the molding support portion 40 is too large, the amount of the insulating resin for casting increases and the weight of the bus duct 100 becomes too large. Therefore, the width of the molding support portion 40 does not exceed 110% The width of the molding support portion 40 may be smaller than the width of the molding portion 23 but the width of the molding support portion 40 may be too small to sufficiently secure the strength of the molding support portion 40 It is desirable to prevent the width of the molding portion 23 from becoming smaller than 90%. Therefore, it has been confirmed through repeated tests.

The cross sectional area of the molding support portion 40 (the sum of the areas of the molding support portions 40 under the molding portion 23) of the molding support portion 40 shown in FIG. The total area in the longitudinal direction) of 20% to 40%. It is preferable to determine the value of the cross-sectional area of the molding support portion 40 for the same reason as the reason why the width of the molding support portion 40 is determined.

A plurality of base frames 50 for mounting the molding support part 40 on the lower panel side may be provided under the molding support part 40 while crossing the plurality of molding parts 23.

The base frame 50 includes a vertical main bar 52 extending across the plurality of molding parts 23 and extending in the horizontal direction at an upper end of the main bar 52, And a lower bending plate 56 bent from the lower portion of the main bar 52 and extending in the horizontal direction and fastened to the lower panel 64. [ have.

The number of the base frames 50 corresponding to the number of the molding supporting portions 40 formed in one molding portion 23 can support the molding supporting portion 40.

In the present embodiment, the base frame 50 is configured such that the main bar 52, the upper bent plate 54 and the lower bent plate 56 are formed in a 'C' shape, but not limited thereto, 40 and the lower panel 64. The upper and lower panels 40, For example, the base frame 50 may have a shape such as 'E' to support the base frame 50.

3 and 4, the upper and lower bent plates 54 and 56 extend in different directions with respect to a central portion of the molding part 23, Respectively.

4, the left two base frames 50 are arranged so that the upper bent plate 54 and the lower bent plate 56 extend toward the left, and the two right base frames 50 The upper bending plate 54 and the lower bending plate 56 are disposed so as to extend toward the right side.

The base frame 50 may alternatively be arranged so that the adjacent base frames 50 extend in different directions.

6 shows a connection part 200 to which a pair of bus ducts constituting a booth duct system according to the present invention are connected. FIG. 7 shows a state in which the cover member is in a state where the pair of bus ducts shown in FIG. FIG.

The method of interconnecting the bus ducts of the present invention uses a method of connecting a bus duct of general air-insulating type.

That is, the booth duct of the present invention is provided with the molding part 23 in the bus bar 21. However, in the case where the conductor is made of aluminum in addition to the purpose of waterproof, etc., the booth bar reinforces the rigidity of the conductor, Therefore, if the waterproof performance is not required, the connecting portion can be connected to a conventional air-isolating bus-duct connecting method.

6 and 7, when the two bus ducts 100a and 100b are connected, the length of the side panel 66 is longer than the length of the upper panel 62 or the lower panel 64 The end portions of the bus bars 21a and 21b and the side panels 66a and 66b of the respective bus ducts 100a and 100b are connected to each other The connecting portion 200 can be formed by fastening the connecting conductors 25 through the fastening member b in a state in which the connecting conductors 25 are stacked and disposed on the side surfaces of the respective bus bars 21a and 21b. In this case, the side panels 66a and 66b may also be connected by fastening members such as bolts.

Since the length of the side panel 66 is longer than that of the upper panel 62 or the lower panel 64, the side panels 66a and 66b are also fastened and connected by fastening members such as bolts, Since each of the bus bars 21a and 21b is also connected via the connection conductor 25, the upper and lower regions of the connection portion 200 are opened. Therefore, So that the connection of the booth duct can be completed.

The bus duct connecting method shown in Figs. 6 and 7 is only one example, and various methods other than the method using the connecting conductor 25 can be used for connecting each bus bar or panel.

The spacing distance between the conductors 21a and 21b in the connecting portion is a minimum spacing distance that satisfies the inter-phase insulation of the bus bars in a nodular state, and the spacing between the molding portions in the duct is determined based on the spacing distance . The conductors 21a and 21b are connected in a coreless state in the connecting portion 200 and therefore the distance between the bus bars in the duct 60, that is, the distance between the molding portions 23 Should be not less than the minimum separation distance at which the inter-phase insulation of the specific conductors and opposing connecting conductors 25 at the connections can be ensured.

In the case of heat generation other than the inter-phase insulation, the connecting conductor 25 is connected to the side surface of the conductor in a state where the conductor of the bus bar 21 comes back from the connecting portion 200. Consequently, The amount of generated heat can be reduced. Therefore, the heat generation may not be a significant problem as compared with the region where the molding portion is provided, without forming the molding portion in the conductor in the connection portion 200.

The area where the conductors are connected through the connecting conductor 25 can be configured to be enclosed by a separate boot (insulator), a cap member, or the like for the purpose of protecting the conductor.

6, the booth duct 100 of the present invention is constructed such that the booth bar 21 is fastened to the connecting portion 200 connecting the pair of bus ducts, And the connection portion 200 is covered with the member c or the like.

Likewise, it is preferable not to form a vent hole in the cover member (c) for the same reason as to prevent moisture such as rainwater or the like from penetrating through the upper panel 62 to enter the bus bar 21 in the conductive state in the connection region Do.

The booth duct system shown in FIGS. 6 and 7 has a molding insulation section in which the plurality of booth bars 21 are molded and insulated from each other in the duct, and an air insulation section in which the air insulation is insulated It can be said that they are repeatedly provided along the respective longitudinal directions. In this case, the air insulation section may be disposed at a position corresponding to the connection section 200.

According to the booth duct of the present invention described above, since the molding part is added to the booth bar provided in the duct, the heat radiation performance can be improved by expanding the heat radiation area. Therefore, compared with the method in which the molding part is not provided, Sectional area of a conductor to be connected to the booth duct can be reduced and aluminum or aluminum alloy based metal having relatively low rigidity due to rigidity reinforcement by the molding part can be used as the bus bar conductor and the connection part for connecting the bus ducts is not separately molded , It is possible to obtain an effect that the molding work is unnecessary in the site, the construction is simple and the maintenance property of the connecting portion can be improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. You can do it. It is therefore to be understood that the modified embodiments are included in the technical scope of the present invention if they basically include elements of the claims of the present invention.

10: Booth duct
21: Busbar
23: Molding part
40: molding support
60: Duct

Claims (15)

A bus duct system comprising a plurality of unit bus ducts and a connecting portion for connecting the plurality of unit bus ducts,
Wherein the unit bus duct includes a plurality of bus bars formed by a conductor, a plurality of molding units surrounding the plurality of bus bars and formed by the mold, and a plurality of bus bars having the molding units therein,
Wherein the connecting portion is formed by mutually connecting the busbars constituting each unit bus duct to each other in a state of being connected to each other. The method according to claim 1,
Wherein the booth bar is made of aluminum or an aluminum alloy. The method according to claim 1,
Wherein the molding part is formed by mixing 70:30 to 80:20 filler to epoxy and adding a hardening agent to the epoxy. The method according to claim 1,
Wherein a separate cover member is mounted on an open area of the connection part that is not covered by the duct. The method according to claim 1,
And a vent hole formed on the side surface of the duct so as to be inclined downward. 6. The method of claim 5,
The duct may include an upper panel provided on an upper portion of the bus bar, a lower panel provided below the bus bar, and a pair of side panels provided on a side surface of the bus bar, Wherein the booth duct system comprises: The method according to claim 6,
Wherein the upper panel and the lower panel are not provided with a vent hole. The method according to claim 6,
When the length of the side panel is longer than that of the upper panel or the lower panel and when connecting the two unit bus ducts, the bus bar and the end of the side panel of each bus duct are connected to the sides of the respective bus bars And a cover member is mounted on an upper portion and a lower portion of the connection portion. The method according to claim 6,
The booth bar of the unit booth duct is provided at one side of the molding part and includes at least one molding supporting part integrally formed when the molding part is formed in order to fix the respective booth bars to the lower panel, Booth duct system that features. 10. The method of claim 9,
And a plurality of base frames provided at one side of the molding supporting part and interposed between the molding supporting part and the bottom panel while crossing the plurality of molding parts. The method according to claim 1,
The spacing distance between the conductor and the conductor and the facing conductor in the connection portion is a minimum spacing distance satisfying the inter-phase insulation in the stator state, and the spacing between the molding portions in the duct is determined based on the spacing distance Wherein the booth duct system comprises: A plurality of bus bars spaced apart in parallel;
A duct accommodating the plurality of bus bars; And
And at least one connection portion to which the plurality of bus bars and the duct are connected at predetermined intervals,
Wherein the plurality of bus bars are repeatedly provided along a longitudinal direction of the booth bar alternately with a molded insulation section in which molding is added and insulated, and an air insulation section in which the air insulation is insulated. 13. The method of claim 12,
And the air insulation section is disposed at a position corresponding to the connection section. 13. The method of claim 12,
Wherein a cover member is mounted on an area exposed by the duct without being shielded. 13. The method of claim 12,
Wherein the spacing distance of the plurality of bus bars is a minimum distance satisfying the inter-phase insulation in the air insulation section.

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