KR101541191B1 - Electric power busway duct improved water-proof performance - Google Patents

Abstract

The present invention relates to a power bus duct having enhanced watertightness characteristics suitable for use as a power distribution line outside of a building or where there is concern about the penetration of moisture, such as a ship, by securing excellent watertightness by a simple structure. A power bus duct comprising a plurality of bus bars (200) having a square cross section as a power conductor and an enclosure (300 or 300a or 300b) for receiving and protecting the plurality of bus bars (200) 300 or 300a or 300b is formed by joining two or more panels together and is provided between two overlapping portions of two panels in a state of being exposed to the outside among the overlapping portions between the two or more panels, 400 or 401 is interposed between the gasket 450 and the gasket 450 to ensure high watertightness with the gasket 450 alone or by the expansion of the water expanding index tape 400 or 401 when moisture permeates.

Electric power, bus, duct, watertightness, enclosure, water expansion, exponent, tape, gasket,

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric power bus duct,

The present invention relates to a power bus duct used as a power transmission line. More specifically, the present invention can provide a watertightness by a simple structure and can be used as a power distribution line outside of a building or where there is concern about moisture infiltration such as a ship The present invention relates to a power bus duct with enhanced watertightness characteristics.

The power bus duct can transmit a large amount of electricity compared to general cable wiring, and is widely used as a power distribution line for high-rise buildings and large-scale factories.

The power bus duct has a form in which a plurality of bus bars having a square cross section for directly transmitting electricity are built in the enclosure.

These power bus ducts are characterized by the fact that they are separately wired through additional work after the building of the actual building columns and walls (eg, concrete structures) is completed, and that they are prepared for power draw and maintenance for each load As a result, most of the sections of the wiring line are exposed in the air.

However, due to the fact that the enclosure of the power bus is made up of a combination of several panels, there is a gap in the overlap between the panel and the panel, which causes moisture to penetrate. For example, bus ducts that are exposed to the outside of a building, watery facilities such as ships, or where they pass through a watery portion of a building or factory, can easily penetrate through the gaps between the panels will be. If moisture penetrates into the inside of the enclosure, it will cause not only the enclosure itself but also the corrosion of the bolts for joining the panels, and the risk of electric power accidents.

As shown in Figs. 13 and 14, the gasket 11 is provided at each panel joint of the enclosure 10, but a power bus duct installed outside (or passing through) the inside of the ship, When the gasket 11 is installed only in an area where there is a possibility of infiltration with a lot of moisture or habit, it is necessary to additionally apply a sealant 12 made of silicone or the like to the outside of the joint.

However, since the application of the sealant is performed manually by the operator, it takes a lot of time and manpower to work, and the quality of the sealant can not be guaranteed.

14, the enclosure 10 is enclosed by the housing 20 and the sealant 22 is attached to the outer joint portion (overlapping portion) of the housing 20 in addition to the gasket 21, And it is inconvenient to apply the sealant 31 to the joint between the joint cover 30 and the housing 20 that surrounds the connection between the duct and the duct.

As shown in FIGS. 15A and 15B, in order to prevent moisture infiltration, a double enclosure is applied. In this case, however, when the enclosure 40 is installed outside the building or in an area having substantial water content, The sealant 40 should be further applied over the entire length of the joint of the joint cover 45 and the sealant 46 and the sealant 46 should be further applied to the joint between the joint cover 45 and the enclosure 40. [

Therefore, it is an object of the present invention to provide a power bus duct having enhanced watertightness characteristics suitable for use as a power distribution line outside of a building or where there is concern for moisture infiltration, such as a ship, .

In order to achieve the above object, a power bus duct according to the present invention is a power bus duct comprising a plurality of bus bars having a square cross section as a transmission conductor, and an enclosure for receiving and protecting the plurality of bus bars, More than two panels are combined; And a water expan- sion index tape for watertightness is interposed between the overlapped portions of the two panels that are exposed to the outside among the overlapped portions between the two or more panels.

In this case, a gasket may be further provided on the overlapping portion between the two or more panels in parallel with the interposition of the water expansition index tape.

A power bus duct according to another aspect of the present invention is a power bus duct comprising a plurality of bus bars with a square cross section as a transmission conductor and an enclosure for receiving and protecting the plurality of bus bars, And the abdominal panel are in contact with each other and joined together; A flange is formed at an upper end and a lower end of the abdominal panel so that the upper and lower flanges are respectively engaged with the inner surface of the upper panel and the inner surface of the lower panel by a fastener; And a water expansion index tape is interposed between the upper and lower flanges of the abdominal panel and the overlapping portion between the upper panel and the lower panel.

It is preferable that the water expansition index tape is disposed on the outer side of the fastener in a state in which it does not contact the fastener.

A power bus duct according to another aspect of the present invention is a power bus duct comprising a plurality of bus bars of square cross section as transmission conductors and an enclosure for receiving and protecting the plurality of bus bars, A main panel having one side plate made of a single body and opened in an opposite side direction; And

And a side blocking panel in which an upper side plate and a lower side plate of the main panel are overlapped and engaged with the upper plate and the lower plate of the main panel, respectively; And a water expansition index tape is interposed between the overlapped portion between the upper plate of the main panel and the upper extending plate of the side wall blocking panel and between the lower plate of the main panel and the lower extending plate of the side blocking panel.

A power bus duct according to another aspect of the present invention is a power bus duct including a plurality of bus bars having a square cross section as a transmission conductor and an enclosure for receiving and protecting the plurality of bus bars, A housing made of a single body, the housing having a closed-type three-sided panel and a bottom-opened panel; A lower blocking panel disposed in such a manner as to block a downward opening of the housing, wherein both flanges of the lower blocking panel are coupled to the inner surfaces of the both side portions; And a vent panel disposed in an inner space defined by the housing and the bottom blocking panel in a state of accommodating the bus bar; And a water expansion index tape is interposed between the inner surfaces of both side portions of the housing and the flanges on both sides of the bottom blocking panel to maintain watertightness.

In this case, gaskets may be further provided on the overlapping portions between the inner surfaces of both side portions of the housing and the flanges on both sides of the bottom blocking panel in parallel with the installation of the water-swellable index tape.

Also, the power bus duct is formed in a form of a unit-length power bus duct connected back and forth; Upper and lower joint covers are attached to the cut-off portions of the front and rear enclosures at the connection portion between the front and rear ducts and the ducts; Wherein the upper joint cover is integrally formed with three sides of an upper surface portion and both side surface portions closed together and opened downward to be overlapped with an end portion of the front and rear housings; Wherein the lower joint cover is disposed in such a manner as to close a downward opening of the upper joint cover so that both flanges thereof are overlapped and joined to the flange inner surface of the lower blocking panel; A water expansion index tape is interposed in the overlapping portion between the upper surface portion and the side surface portion of the housing and the upper joint cover; A water expansion index tape is interposed between the flange outer surface of the lower joint cover and the flange inner surface of the lower blocking panel and between the outer surface of the side surface portion of the housing and the inner surface of the side surface portion of the upper joint cover; And a water expan- sion index tape is interposed between the side portions of the upper joint cover and the flange of the lower joint cover facing each other through the spacing portions of the front and rear housings and the lower blocking panels at the connection portion between the front and rear ducts.

It is preferable that a gasket is additionally provided between the flange outer surface of the lower joint cover and the flange inner surface of the lower blocking panel and between the outer surface of the side surface portion of the housing and the inner surface of the side surface portion of the upper joint cover in parallel with the water- .

A gasket may be additionally provided in parallel with the water expansition index tape between the side portion of the upper joint cover and the flange of the lower joint cover facing each other through the spacing portions of the front and rear housings and the bottom blocking panel.

According to the present invention, when a water expansion index tape is provided at a joint portion (overlapping portion) where a panel and a panel of a power bus duct overlap or touch, the water expansion index tape expands due to the penetrating moisture to strongly fill the gap in the joint portion It becomes completely sealed.

In addition, it is possible to ensure sufficient watertightness even with a single enclosure without the need of applying a double enclosure, and there is no need to apply an additional sealant to the outside, thereby simplifying the process, preventing water tightness, have.

Therefore, the electric power bus duct according to the present invention secures excellent watertightness in a portion exposed to the outside of a building, a watery facility such as a ship, or a watery portion in a building or a factory, And safety can be guaranteed, and electric power accident can be prevented.

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

(Example 1)

1 shows a power bus duct according to a first embodiment of the present invention.

As shown, the power bus duct 100 has bus bars 200 of rectangular cross section, which are conductors for transmitting electricity, and an enclosure 300 for receiving and protecting the bus bars 200. The bus bar 200 is made of copper or an aluminum conductor, and its surface is coated with an insulating layer. The enclosure 300 is made of aluminum or stainless steel and covers the bus bars 200 to protect the bus bars 200.

The enclosure 300 of the power bus duct 100 shown in Figure 1 includes an upper panel 310 and a lower panel 320 facing each other and a vent panel 330 covering both sides of the bus bar 200 And they are in contact with each other. A flange 331 extends outwardly from the upper and lower ends of the abdomen panel 330 so that the flange 331 contacts the inner surface of the upper panel 310 and the inner surface of the lower panel 320 to form a bolt / Or a fastener 50 such as a rivet.

FIG. 2 is a cross-sectional view illustrating a state in which the flange 331 of the abdomen panel 330 and the overlapped portions exposed to the outside of the upper panel 310 and the lower panel 320 (Overlapping portions or overlapping portions) W1 and W2 of the water-tightness.

2, a water expansion index tape (or a moisture absorption tape) 400 (also referred to as a "moisture absorption tape") 400 is interposed between the flange 331 of the abdominal panel 330 and the upper panel 310 and the lower panel 320, Is interposed to maintain watertightness.

It should be noted that the thickness of the water-swell index tape 400 and the thickness of the gasket 450 are exaggerated to be very thick in order to facilitate understanding, in the following drawings for explaining the present invention including FIG. 2.

When the water (including moisture or moisture) comes into contact with the water, the water-swell index tape 400, like a normal water-swell index tape, expands itself several times to several tens of times while absorbing water, To completely block the penetration of moisture. In addition, it has self-elasticity, it can easily cope with deformation of the structure, and is excellent in durability, weather resistance, and chemical resistance.

The water expansion index tape 400 is preferably formed by applying an adhesive layer 411 to both surfaces of the inner layer 410 which is a water expansion index material. The water swell index material may be, for example, a conventional 'acrylate salt neutralizing agent', 'water expansion rubber index material', 'bentonite rubber index material', etc. The adhesive layer 411 may be, for example, Rate adhesive.

2, it is preferable that the water expansition index tape 400 is disposed at a position spaced apart from the fastener 450 so as not to touch the fastener 50. For example, when the total distance from an inlet portion where moisture penetrates, that is, an outer end of the flange 331 of the abdominal panel 330 to the outer diameter of the fastener 50 is L, It is preferable that the index tape 400 be installed within a section from the outer end of the flange 331 to the 4/5 point of the entire distance L. [ The water absorbed in the water expansion index tape 400 may flow along the fastener 50 if the water expansion index tape 400 is in contact with or too close to the fastener 50.

2, in order to prevent the water absorbed by the water-swell index tape 400 from penetrating into the inside of the water-swell index tape 400, the water- (412).

In parallel with the installation of the water-swell index tape 400, another additional sealing means may be further provided.

That is, as shown in FIG. 3A, a gasket 450 may be further provided, or a blocking protrusion 460 may be further provided, as shown in FIG. 3B. It is preferable that the gasket 450 and the blocking protrusion 460 are installed on the inner side far from the water expansion index tape 400, for example, inside the fastener 50. The gasket 450 is compressed between the flange 331 of the abdominal panel 330 and the upper and lower panels 310 and 320 to perform water tightness. A plurality of the blocking protrusions 460 protrude in the width direction of the flange 331 and are continuous in the longitudinal direction of the flange 331. The blocking protrusions 460 are in close contact with the upper panel 310 or the lower panel 320 And each of the blocking protrusions 460 forms a water wall that sequentially blocks water.

As described above, according to the present invention, in the enclosure 300 in which two or more panels are combined, the water expan- sion index tape 400 alone or the gasket 450 can be attached to the externally exposed joints (overlapped portions or overlapping portions) And the blocking protrusion 460 are reinforced to enhance the waterproofing, order and exponential function.

(Example 2)

4 to 6 show a power bus duct according to a second embodiment of the present invention.

4 and 5, the enclosure 300a of the power bus duct 100a according to the present embodiment includes a main panel 340 and a side blocking panel 350. [

The main panel 340 has a shape in which the upper plate 341, the lower plate 342, and the one side plate 343 are formed as a unitary body and open in the opposite side direction.

The side blocking panels 350 are formed such that the side panels of the main panel 340 are fitted with the bending plates 351 thereof and the upper and lower extending plates 352 thereof are engaged with the upper plates 341 and 342 of the main panel 340, And is in contact with the lower plate 342 and joined by a plurality of fasteners 50.

Between the upper panel 341 of the main panel 340 and the upper panel 352 of the side blocking panel 350 and between the main panel 340 and the main panel 340, A water expansion index tape 400 is provided between the lower plate 342 of the side closure panel 350 and the lower extension plate 352 of the side closure panel 350.

The structure, installation position and the like of the water swell index tape 400 according to the present embodiment are the same as those of the water swell index tape 400 of the first embodiment described above.

As shown in FIGS. 6A and 6B, a gasket 450 may be further provided as another additional sealing means in parallel with the installation of the water expansition index tape 400, as shown in FIG. 6B The blocking protrusion 460 may be further provided. The gasket 450 and the blocking protrusion 460 are the same as those of the gasket and the blocking protrusion of the first embodiment described above.

(Example 3)

7A to 13 show a power bus duct according to a third embodiment of the present invention.

7A and 7B, an enclosure 300b of the power bus duct 100b according to the present embodiment includes a housing 360, a bottom blocking panel 370, and the housing 360, And an abdominal panel 380 and a bus bar 200 disposed in the inner space formed by the bottom blocking panel 370.

In the housing 360 according to the present embodiment, the upper face portion 361 and the both side face portions 362 are formed as a single body and are closed and only the lower side is opened.

The bottom blocking panel 370 is installed in a manner blocking the downward opening of the housing 360. Both the flanges 371 of the bottom blocking panel 370 are in contact with the inner surfaces of the both side portions 362.

The abdomen panel 380 is disposed in an inner space formed by the housing 360 and the bottom blocking panel 370 while accommodating the bus bar 200 therein.

The abdominal panel 380 may be installed vertically or horizontally.

The flange 381 of the abdominal panel 380 is brought into contact with the inner surfaces of the both side portions 362 of the housing 360 and is coupled by the fastener 50 as shown in FIG.

7B, the upper and lower flanges 381 of the ventilation panel 380 are attached to the inner surface of the upper surface portion 361 of the housing 360 and the bottom surface of the lower blocking panel 370 And is engaged by the fastening tool 50.

The power bus duct 100b having such a structure is constructed such that the upper and side surfaces of the duct are completely covered with the housing 360 and the abdominal panel 380 and the bus bar 200 are accommodated in the inner space thereof, This prevents moisture from penetrating well. On the other hand, the watertightness can be ensured while using a single enclosure without using a double enclosure.

Here, although the connecting portion J between the duct and the duct is shown only in FIG. 7B, the same configuration is also applied to FIG. 7A. The joint J is for covering and sealing the duct where the unit length is connected to the duct, and includes an upper joint cover 390 and a lower joint cover 395.

In the power bus tuck 100b according to the present embodiment, the joint between the panels exposed to the outside, that is, the joint between the housing 360 of the enclosure 300b and the flange 371 of the bottom blocking panel 370 The sealing structure is shown in detail in Figures 8A and 8B.

8A, a water expansion index tape 400 is interposed between the inner surfaces of both side portions 362 of the housing 360 and the flanges 371 on both sides of the bottom blocking panel 370. The water expansion index tape 400 according to this embodiment is the same as the water expansion index tapes according to the first and second embodiments described above.

In parallel with the installation of the water swell index tape 400, as shown in FIG. 8B, between the inner surfaces of both side portions 362 of the housing 360 and the flanges 371 of the bottom blocking panel 370 A known gasket 450 can be further installed.

9 to 12 show a sealing structure for a connection portion between the duct and the duct in this embodiment. 7B together.

The connecting portion between the duct and the duct has a shape in which the front and rear enclosures 300b are disconnected and the upper and lower joint covers 390 and 395 are covered with the disconnected portions.

The upper joint cover 390 has a shape in which the upper surface portion 391 and the both side surface portions 392 are formed as a single piece and closed only at the lower side. The upper joint cover 390 is partially overlapped with the end of the front and rear housing 360.

The lower joint cover 395 is provided to block the downward opening of the upper joint cover 390 and both flanges 396 of the lower joint cover 395 abut the inner surface of the flange 371 of the lower blocking panel 370. Thus, the flange 396 of the lower joint cover 395, the flange 371 of the lower blocking panel 370, the side portions 362 of the housing 360 and the side portions 392 of the upper joint cover 390 (In particular, see Fig. 7B).

A water expansion index tape 400 is interposed between the upper surface portion 361 and the side surface portion 362 of the housing 360 and the upper joint cover 390. Further, the gasket 450 may be further interposed with the water-swell index tape 400.

Next, the sealing structure of the portion where the end portions of the front and rear housing 360 and the upper and lower joint covers 390 and 395 overlap at the connection portion between the front and rear ducts of the present invention is well shown in FIG.

11, between the outer surface of the flange 396 of the lower joint cover 395 and the inner surface of the flange 371 of the lower blocking panel 370, the outer surface of the flange 371 of the lower blocking panel 370, Between the outer surface of the side surface of the housing 360 and the inner surface of the side surface portion 392 of the upper joint cover 390 is interposed between the inner surface of the housing 360 and the inner surface of the side surface portion 362 of the housing 360. The gasket 450 may be further interposed with the water-swell index tape 400.

Next, the sealing structure of the portion where the end portions of the front and rear housings 360 and the upper and lower joint covers 390 and 395 do not overlap with each other at the connecting portion between the front and rear ducts (see (b) 12b.

12A and 12B, the housing 360 and the bottom blocking panel 370 are spaced apart from each other in the longitudinal direction (maintaining a space) in the connecting portion between the front and rear ducts, The flange 396 of the lower joint cover 395 and the flange 396 of the lower joint cover 395 directly face each other. The thickness of the housing 360 and the thickness of the lower blocking panel 370 are set to be equal to each other between the side surface portion 392 of the upper joint cover 390 and the flange 396 of the lower joint cover 395, A gap is formed. A water expansion index tape 401 is interposed in this gap.

Further, as shown in Fig. 12A, a gasket 450 may be additionally provided in parallel with the water-swell index tape 401. Fig.

Further, as shown in FIG. 12B, the water expansion index tape 401 and the gasket 450 may be stacked. In this case, the thickness of the water expanding index tape 401 may be made larger than the thickness of the gasket 45, or the thickness of the gasket 450 may be made thicker than the thickness of the water expanding index tape 401. In this case, the water expansion index tape 401 expands upon permeation of water, thereby pressing the gasket 450 on both sides to increase the sealing force.

As described above, according to the present invention, when a water expansive index tape is provided at a joint portion where a panel and a panel of a power bus duct overlap or touch, the water expansive index tape expands due to infiltrating moisture, .

In addition, it is possible to ensure sufficient watertightness even with a single enclosure without the need of applying a double enclosure, and there is no need to apply an additional sealant to the outside, simplifying the installation process, preventing water tightness, There is also an advantage.

Therefore, the electric power bus duct according to the present invention secures excellent watertightness in a portion exposed to the outside of the building, in a watery facility such as a ship, or in a watery place in a building or a factory, And safety can be guaranteed, and electric power accident can be prevented.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications and equivalent arrangements may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims. But fall within the scope of the appended claims of the invention.

1 is a view showing a power bus duct according to a first embodiment of the present invention.

Fig. 2 is an enlarged view showing a sealing structure of a joint portion (overlapped portion) of the housing of Fig. 1;

Figs. 3A and 3B are enlarged views showing another sealing structure of the joint of the housing of Fig. 1;

4 is a cross-sectional view of a power bus duct according to a second embodiment of the present invention.

Figs. 5A and 5B are enlarged views showing the sealing structure of the joint of the housing of Fig. 4;

6A and 6B are enlarged views showing another sealing structure of the joint of the housing of Fig.

7A and 7B are perspective views of a power bus duct according to a third embodiment of the present invention.

8A and 8B are enlarged views showing the sealing structure of the joint portion of the housing of Fig. 7;

9 is a cross-sectional view taken along line A-A of Fig. 7B.

10 is a cross-sectional view taken along the line B-B in Fig. 7B.

11 is a cross-sectional view taken along the line C-C in Fig. 7B.

12A and 12B are sectional views taken along the line D-D in Fig.

13 is a schematic view showing an example of a conventional power bus duct.

14 is a schematic diagram showing another example of a conventional power bus duct.

15 is a schematic diagram showing another example of a conventional power bus duct.

Description of the Related Art

50: fasteners 100, 100a, 100b: electric bus duct

200: bus bar 300, 300a, 300b: enclosure

310: upper panel 320: lower panel

330: abdominal panel 331: flange

340: main panel 341: top plate

342: Lower plate 343:

350: side blocking panel 351:

352: extension plate 360: housing

361: upper surface portion 362:

370: bottom blocking panel 371: flange

380: abdominal panel 381: flange

390: upper joint cover 391: upper surface portion

392: Both side portions 395: Lower joint cover

396: Flange

400, 401: water expansion index tape 410: inner layer

411: Adhesive layer 412: Waterproof film

450: gasket 460: blocking protrusion

Claims (13)

delete A power bus duct comprising a plurality of bus bars and an enclosure for receiving and protecting the plurality of bus bars, The enclosure is in the form of a combination of two or more panels, A water expan- sion index tape for watertightness is interposed between the overlapped portions of the two panels that are exposed to the outside among the overlapped portions between the two or more panels, Wherein a gasket is provided in the overlapping portion between the two or more panels in parallel with the interposition of the water expansition index tape. delete A power bus duct comprising a plurality of bus bars and an enclosure for receiving and protecting the plurality of bus bars, The upper panel 310, the lower panel 320 and the abdomen panel 330 are in contact with each other, A flange 331 is formed at an upper end and a lower end of the abdomen panel 330 and the upper and lower flanges 331 are fastened to the inner surface of the upper panel 310 and the inner surface of the lower panel 320, Is coupled by a sphere 50, A water expansion index tape 400 is interposed between the upper and lower flanges 331 of the abdomen panel 330 and the upper panel 310 and the lower panel 320, Wherein the water expansition index tape (400) is disposed on the outer side of the fastener (50) in a state of not contacting the fastener (50). A power bus duct comprising a plurality of bus bars and an enclosure for receiving and protecting the plurality of bus bars, The enclosure, A main panel 340 having a top plate 341, a bottom plate 342, and one side plate 343 formed as a single body and opened in the opposite side direction; And The upper and lower extension plates 351 and 352 of the main panel 340 are overlapped with the upper plate 341 and the lower plate 342 of the main panel 340, And a side blocking panel (350) The overlapping portions between the upper plate 341 and the lower plate 342 of the main panel 340 and the upper and lower extension plates 352 and 352 of the side blocking panel 350 are brought into close contact with each other, Lt; / RTI > The overlapping portion between the upper plate 341 of the main panel 340 and the upper extension plate 352 of the side blocking panel 350 and the lower portion of the lower plate 342 of the main panel 340 and the lower portion of the side blocking panel 350 The water expansion index tape 400 is interposed between the extension plates 352 so that the water expansion index tape 400 does not come in contact with the fastener 50, Wherein the power bus duct is disposed in the vicinity of the power bus duct. A power bus duct comprising a plurality of bus bars and an enclosure for receiving and protecting the plurality of bus bars, The enclosure, A housing 360 composed of a panel in which the upper surface portion 361 and the both side surface portions 362 are formed as a single body and the three sides are closed and the lower side is opened; A bottom blocking panel (370) disposed in such a manner as to close the downward opening of the housing (360), both flanges (371) of which are in contact with the inner surface of the both side portions (362); And And a vent panel (380) disposed in an inner space formed by the housing (360) and the bottom blocking panel (370) while accommodating the bus bar (200) The water expansion index tape 400 is interposed between the inner surface of the side surface portion 362 of the housing 360 and the flange 371 of the lower blocking panel 370 to maintain the watertightness Power bus duct with enhanced watertight characteristics. The method according to claim 6, The gasket 450 is attached to the overlapping portion between the inner surface of the both side portions 362 of the housing 360 and the flanges 371 on both sides of the bottom blocking panel 370 in parallel with the installation of the water- Wherein the power bus duct has a watertight characteristic enhanced. The method according to claim 6, The power bus duct is formed in a form of a unit-length power bus duct connected to the front and rear, At the connection between the front and rear ducts and the duct, upper and lower joint covers 390 and 395 are covered at the cut-off portions of the front and rear enclosures 300b, The upper joint cover 390 is formed by covering three surfaces of the upper surface portion 391 and the both side surface portions 392 as a unitary body and being opened downwardly and overlapped with the end portion of the front and rear housing 360 under, The lower joint cover 395 is disposed in such a manner as to block the downward opening of the upper joint cover 390 so that both flanges 396 thereof are overlapped on the inner surface of the flange 371 of the lower blocking panel 370, And, A water expansion index tape 400 is interposed in the overlapping portion between the upper surface portion 361 and the side surface portion 362 of the housing 360 and the upper joint cover 390, Between the outer surface of the flange 396 of the lower joint cover 395 and the inner surface of the flange 371 of the lower blocking panel 370 and between the outer surface of the side surface portion of the housing 360 and the inner surface of the side surface portion 392 of the upper joint cover 390. [ A water expansion index tape 400 is interposed, A side portion 392 of the upper joint cover 390 and a flange 396 of the lower joint cover 395 facing each other through the spacing portions of the front and rear housings 360 and the lower blocking panels 370 at the connection portion between the front and rear ducts. And a water expansion index tape (401) interposed therebetween. 9. The method of claim 8, Between the outer surface of the flange 396 of the lower joint cover 395 and the inner surface of the flange 371 of the lower blocking panel 370 and between the outer surface of the side surface portion of the housing 360 and the inner surface of the side surface portion 392 of the upper joint cover 390. [ Wherein a gasket (450) is additionally provided in parallel with the water expansion index tape (400). 9. The method of claim 8, Between the side portion 392 of the upper joint cover 390 and the flange 396 of the lower joint cover 395 facing each other through the spacing between the front and rear housings 360 and the bottom blocking panel 370, Wherein a gasket (450) is additionally installed in parallel with the expansion index tape (401). A power bus duct comprising a plurality of bus bars and an enclosure for receiving and protecting the plurality of bus bars, The enclosure is in the form of a combination of two or more panels, Wherein a waterproofing index tape (400) and a blocking protrusion (460) are provided between the overlapped portions of the two panels in a state of being exposed to the outside among the overlapped portions between the two or more panels, This enhanced power bus duct. 12. The method of claim 11, The two or more panels are joined by a fastener (50) in close contact with each other, Wherein the water expan- sion index tape (400) is disposed outwardly with respect to the fastener (50), and the interrupting projection (460) is disposed inwardly of the fastener (50). 13. The method according to claim 11 or 12, Wherein the blocking protrusion (460) has a plurality of protrusions arranged continuously.

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