Claims:1. An arrangement for resistance to ingress of fluid at tap off opening in a plug-in point busway, the arrangement comprising:
a busway (1) comprising a side housing assembly (1.1), a top housing assembly (1.2) and a bottom housing assembly;
a plug-in power box (2) to mate with the tap-off opening (A) of the plug-in point busway (1);
characterized in that the arrangement comprising:
an ingress protection block (1.1.1) mounted on the top housing assembly (1.2);
fluid routers (2.2) provided on a rear side of the plug-in power box (2), the rear side being received at the tap-off opening (A) in the plug-in point busway (1); and
guide plates (3) provided along a length of the rear side of the plug-in power box (2);
where the ingress protection block (1.1.1), the fluid routers (2.2) and the guide plates (3) prevent ingress of fluid through plug-in points of the plug-in power box (2) in relation to the plug-in point busway (1).

2. The arrangement as claimed in claim 1 comprising a flat gasket (11) placed along edges (B) of the tap-off opening (A), the edges (B) extending to metal contacts of the top housing assembly (1.2) such that, the flat gasket (11) lies in-between mating metallic surfaces of ingress protection block (1.1.1) and the top housing assembly (1.2), the flat gasket (11) further makes contact with metal contacts affixing the side housing assembly (1.1) with the top housing assembly (1.2) in the busbar (1).
3. The arrangement as claimed in claim 2 wherein the flat gasket (11) is positioned adjacent to a plug-in hole base cover (4) of the tap-off opening (A).
4. The arrangement as claimed in claim 3 wherein the plug-in hole base cover (4) is restricted in movement by rivet fixing (8) with the side housing assembly (1.1).
5. The arrangement as claimed in claim 4 wherein the plug-in hole base cover (4) is screw-fitted to a plug-in hole cover (5) using screws having the flat gasket (11) positioned at metallic contacts in-between the plug-in hole base cover (4) and the plug-in hole cover (5).
6. The arrangement as claimed in claim 5 wherein edges of the plug-in hole base cover (4) screw-fitted to the plug-in hole cover (5) have a sealant (12) applied thereupon, the edges making contact with the ingress protection block (1.1.1) and the side-housing assembly (1.2).
7. The arrangement as claimed in claim 1 wherein the side house assembly (1.2) is fabricated by welding of side enclosures (1.2.2) and a plug-in location ingress protection cover (1.2).
8. The arrangement as claimed in claim 1 wherein the top housing assembly (1.1) is assembled by fastening the ingress protection block (1.1.1) on top enclosure (1.1.2) by a pair of nut-bolts.
9. The arrangement as claimed in claim 1 wherein when the plug-in power box (2) mates with the tap-off opening (A) of the plug-in point busway (1), the fluid routers (2.2) divert the fluid towards the ingress protection block (1.1.1), and the ingress protection block (1.1.1) act as an outlet for the fluid when the fluid flows in the top housing enclosure (1.2) of plug-in point busway (1).
10. An arrangement for resistance to ingress of fluid at tap off opening in a plug-in point busway, the arrangement comprising:
a busway (1) comprising a side housing assembly (1.1), a top housing assembly (1.2) and a bottom housing assembly;
characterized in that the arrangement comprising:
an ingress protection block (1.1.1) mounted on the top assembly housing assembly (1.2);
a flat gasket (11) placed along edges (B) of the tap-off opening (A), the edges (B) extending to metal contacts of the top housing assembly (1.2) such that, the flat gasket (11) lies in-between mating metallic surfaces of ingress protection block (1.1.1) and the top housing assembly (1.2), the flat gasket (11) further makes contact with metal contacts affixing the side housing assembly (1.1) with the top housing assembly (1.2) in the busbar (1).;
a plug-in hole base cover (4) of the tap-off opening (A) wherein the flat gasket (11) is positioned adjacent to the plugin hole base cover (4), the plug-in hole base cover (4) being restricted in movement by rivet fixing (8) with the side housing assembly (1.1);
a plug-in hole cover (5) screw fitted to the plug-in base cover (4) using screws;
wherein the flat gasket (11) positioned at metallic contacts in-between the plug-in hole base cover (4) and the plug-in hole cover (5); and
a top cover (6) covering the plug-in hole cover (5) by screw-fitting the top cover (6) to the plug-in hole cover (5).

11. The arrangement as claimed in claim 10 comprising an additional gasket (11) placed along the edges of the metallic contacts between the top cover (6) and the plug-in hole cover (5).
, Description:TECHNICAL FIELD
The present invention is related to plug-in point busways with intermediate openings.
BACKGROUND
Busways are installed in various orientations in buildings. Busway system can be mounted in edgewise or flatwise orientation and vertical and horizontal directions. Typically, busways are installed prior to interior and exterior work of building. At most of installation sites, busways are installed after completing slab work. Plastering and pointing, watering, plumbing, drilling for point fixing and painting work is carried out after busway installation. Feeder accessories has protection against ingress through their enclosure, but this does not case at plug-in hole location of busway plug-in feeder accessory. Due to the joint between jaw contact of the plug-in unit and plug-in feeder, there is a high possibility of ingress of foreign particles in plug-in hole locations of the busway system. Interference of foreign particle with live parts and insulation degrades its working capability and may lead to electrical faults.
Another motive is during plastering and pointing, watering and painting work, water falls on the enclosures of busway accessories. Other than plugin feeder (PIF) busway, feeder accessories do not have an opening in between jointing section, thus water seepage is not possible. While PIF has a provision for the insertion of jaw contacts of PIB inside PIF for electrical connection. This could lead the probable opening and loop holes on the enclosures for flowing water droplets to percolate inside the enclosure. Percolated water droplets result in drop-in insulation resistance. Wet or moisture absorbed insulation region may lead to electrical faults.
Busway units such as straight run, edgewise and flatwise elbows, flange ends and various units other than plug-in point busway do not have any intermediate opening. They are completely sealed by the enclosure along its cross-section throughout the length. Jointing section of two busway units is taken care of ingress protection especially against the entry of fluid by fastening of enclosures. Whereas, plug-in point busways have intermediate openings for the tapping of supply which is carried by insertion of the plug-in box. On installation sites, plug-in box are considered as a more flexible source for the tapping of electricity. Based on the load requirement different size of the plug-in box can be inserted on the same locations by ejecting the previously inserted one. Also, the same box can be used for different plug-in hole locations for tapping electricity. The possibility of manual error while insertion and ejection of plug-in box create loop holes for insertion of fluid.
Plug-in boxes are fixed with plug-in point busway enclosure using clamps on top and bottom side. Due to the weight of the outgoing cable, the plug-in box may get pulled outside of plug-in point feeder between the connected clamps; if cables are not supported properly. Therefore, concern location is prone to entry of ingress. This will also create the threat of a reduction in the clearance between two phases at jaw contacting region and thereby it will lead to electrical faults. This may turn into adverse for installed busways, surrounding the property and may lead injurious to personnel in the vicinity.
Currently, available technology has featured such that plug-in point cover for protection of ingress in plug-in point busways when water splashes on plug-in point. Plug-in point cover is necessary and effective when a plug-in box is not inserted in plug-in point busway. When the plug-in box is inserted, the box itself acts as the plug-in point cover for the water splashing on its surface in edgewise orientation in a horizontal installation. But when the busways are installed in the vertical installation as a vertical riser, then splashed water on the top surfaces starts flowing over the top enclosure of busways.
Outgoing cables terminated at outgoing terminals of the circuit breaker are coming out of the box through an outlet provided as per availability of space and as per manufacturer. Generally, outlets are provided at the bottom side of the plug-in box. Clamping of the box with busway involves human intervention while installation. Therefore, due to poor clamping and weight of the cable sag may be observed on the plug-in box, which will lead for the gap between the plug-in box and plug-in point busway on the top side of the box. When flowing fluid over enclosures of busway comes in contact with the gap between plug-in point busway and plug-in box, it may prone to seep inside the plug-in point.
A need thus arriving for the provision of a mechanical arrangement which can divert the exuding fluid droplets from entering into the plug-in hole location and provide the resistance to fluid percolation in the plug-in hole location.
SUMMARY
This summary is provided to introduce a selection of concepts in a simplified format that is further described in the detail description of the invention. This summary is not intended to identify key or essential inventive concepts of the claimed subject matter, nor is it intended for determining the scope of the claimed subject matter.
In accordance with the purposes of the invention, the present invention as embodied and broadly described herein provides solutions for preventive measure for water seeping inside the plug-in point busway when plug-in box, also referred to as the ‘power box’, or the ‘plug-in power box,’ is installed as well as when the plug-in box is not installed and the plug-in point is covered with the plug-in top cover.
Accordingly, an aspect of the present invention is to provide an arrangement for providing resistance to ingress of fluid at tap off opening in a plug-in point busway. The arrangement comprises of a busway comprising a side housing assembly, a top housing assembly and a bottom housing assembly. The arrangement further comprises a plug-in power box to mate with the tap-off opening of the plug-in point busway. The arrangement is characterized in that the arrangement comprises of an ingress protection block mounted on the top assembly housing assembly, fluid routers provided on a rear side of the plug-in power box, the rear side being received at the tap-off opening in the plug-in point busway, and guide plates provided along a length of the rear side of the plug-in power box. The ingress protection block, the fluid routers and the guide plates prevent ingress of fluid through plug-in points of the plug-in power box in relation to the plug-in point busway.
In accordance with a further embodiment, the arrangement for providing resistance to ingress of fluid at tap off opening in a plug-in point busway comprises of a flat gasket placed along edges (B) of the tap-off opening, the edges extending to metal contacts of the top housing assembly such that, the flat gasket lies in-between mating metallic surfaces of ingress protection block and the top housing assembly, the flat gasket further makes contact with metal contacts affixing the side housing assembly with the top housing assembly in the busbar.
In accordance with an embodiment, the flat gasket is positioned adjacent to a plug-in hole base cover of the tap-off opening.
In accordance with an embodiment, the plug-in hole base cover is restricted in movement by rivet fixing with the side housing assembly.
In accordance with an embodiment, the plug-in hole base cover is screw-fitted to a plug-in hole cover using screws having the flat gasket positioned at metallic contacts in-between the plug-in hole base cover and the plug-in hole cover.
In accordance with an embodiment, edges of the plug-in hole base cover screw-fitted to the plug-in hole cover have a sealant applied thereupon, the edges making contact with the ingress protection block and the side-housing assembly.
In accordance with an embodiment, the side housing assembly is fabricated by welding of side enclosures and a plug-in location ingress protection cover.
In accordance with an embodiment, the top housing assembly is assembled by fastening the ingress protection block on top enclosure by a pair of nut-bolts.
In accordance with an embodiment, when the plug-in power box mates with the tap-off opening of the plug-in point busway, the fluid routers divert the fluid towards the ingress protection block, and the ingress protection block act as an outlet for the fluid when the fluid flows in the top housing enclosure of plug-in point busway.
Another aspect of the present invention is to provide an arrangement for providing resistance to ingress of fluid at tap off opening in a plug-in point busway, the arrangement comprising a a busway comprising a side housing assembly, a top housing assembly and a bottom housing assembly. The arrangement is characterized in that it comprises of an ingress protection block mounted on the top assembly housing assembly, a flat gasket placed along edges of the tap-off opening, the edges extending to metal contacts of the top housing assembly such that, the flat gasket lies in-between mating metallic surfaces of ingress protection block and the top housing assembly, the flat gasket further makes contact with metal contacts affixing the side housing assembly with the top housing assembly in the busbar. Further, the arrangement comprises a plug-in hole base cover of the tap-off opening wherein the flat gasket is positioned adjacent to the plugin hole base cover, the plug-in hole base cover being restricted in movement by rivet fixing with the side housing assembly. Further, the arrangement comprises a plug-in hole cover screw fitted to the plug-in base cover using screws, wherein the flat gasket is positioned at metallic contacts in-between the plug-in hole base cover and the plug-in hole cover, and a top cover covering the plug-in hole cover by screw-fitting the top cover to the plug-in hole cover.
In one embodiment, the arrangement comprises an additional gasket placed along the edges of the metallic contacts between the top cover and the plug-in hole cover.
The above aspects and the advantages will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings and claims.

BRIEF DESCRIPTION OF FIGURES
To further clarify the advantages and aspects of the invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be construed as limiting its scope. The invention will be described and explained with additional specificity and detail with the accompanying drawings, which are listed below for quick reference.
Figure 1 illustrates a schematic view of plug-in point busway when the plug-in point is inserted.
Figure 2 illustrates a schematic view of the plug-in power box, in accordance with the embodiments of the present invention.
Figure 3(a) illustrates a schematic representation for the placement of plug-in hole base cover, in accordance with an embodiment of the present invention.
Figure 3(b) illustrates a schematic representation for the movement fixing of the plug-in hole location of the plug-in point base cover.
Figure 4 illustrates a schematic arrangement of the side housing assembly of the busbar.
Figure 5 illustrates a schematic arrangement of the top housing assembly of the bulbar.
Figure 6 illustrates an assembly of plug-in hole cover and top cover when the plug-in box is not inserted.
Figure 7 illustrates an assembly of plug-in point busway with the top cover when the plug-in box is not inserted.
It may be noted that to the extent possible like reference numerals have been used to represent elements like drawings. Further, those of ordinary skill in the art will appreciate that the elements in the drawings are illustrated for simplicity and may not have been necessarily drawn to scale. Furthermore, one or more elements may have been represented in the drawings by conventional symbols, and the drawings may show only those specific details that are pertinent to understanding of the embodiments of the invention so as not to obscure the drawings with details that will be readily apparent to those of ordinary skilled in the art having benefit of the description herein.

DETAILED DESCRIPTION
It should be understood at the outset that although illustrative implementations of the embodiments of the present invention are illustrated below, the present invention may be implemented using any number of techniques, whether currently known or in existence. The present disclosure should be in no way limited to illustrative implementations, drawings, and techniques, illustrated below, including the exemplary design and implementation illustrated and described herein, but may be modified within the scope of the appending claims along with the full scope of equivalents.
Unless otherwise defined, all terms and especially technical and/or scientific terms, used herein, may be taken to have the same meaning as commonly understood by one having an ordinarily skilled in the art.
Reference is made herein to some “embodiments”. It should be understood that an embodiment is an example of a possible implementation of any features and/or elements presented in the foregoing claims. Some embodiments have been described for the purpose of illuminating one or more potential ways in which the specific features and/or elements of the foregoing claims fulfill the requirements of uniqueness, utility, and non-obviousness.
Any particular and all details set forth herein are used in the context of some embodiments and therefore should not be necessarily taken as limiting factors to the foregoing claims. The claims and their legal equivalents can be realized in the context of the embodiments other than the ones used as illustrative examples in the description below.
In a first embodiment, the present invention discloses mechanisms for providing resistance to ingress of fluid in a plug-in point busway at a tap off opening that receives the plug-in points of a plug-in power box. The plug-in power box is adapted to mate with the tap off opening of the plug-in point busway at the plug-in points.
In a second embodiment, the present invention discloses mechanisms for providing resistance to ingress of fluid in a plug-in point busway at a tap off opening that receives the plug-in points of a plug-in power box, when the plug-in box is not inserted in the tap off opening of the plug-in point busway.
The detailed description of the present invention is provided by way of illustrations shown in Figures 1 to Figures 7.
The basic components of a plug-in point busway 1 consists top housing assembly 1.1 and side housing assembly 1.2. Figures 3 to 5 depict the arrangement of the plug-in point busway 1. The plug-in point busway 1 also has a bottom enclosure (not shown in Figures) which form the entire busway enclosure along with the top housing assembly and the side housing assembly to contain the conductor 13 of the busway.
Figure 4 depicts the arrangement of the side housing assembly 1.2 of the busway. Side housing assembly 1.2 is fabricated by welding of side enclosure 1.2.2 and a plug-in location ingress protection (IP) cover 1.2.1. During the welding of plug-in location IP cover 1.2.1 with the side enclosure 1.2.2, it has been ensured that all the mating surfaces, edges, and corners are welded and entry of fluid obstructed. The first level of a barrier for fluid entry has been created for flatwise and vertical riser orientation.
Figure 4 depicts the arrangement of top housing assembly 1.1 which is assembled by fastening an ingress protection (IP) block 1.1.1 on top enclosure 1.1.2 by nut-bolt pairs. A flat gasket 11 is placed between two mating metallic surfaces of IP block 1.1.1 and top enclosure 1.1.2 to seal the minute gap against seepage of fluid.
The side housing assemblies 1.2 on either side of conductor 13 in sandwich construction are fixed with top housing assembly 1.1 using nut-bolt pairs 10. The flat gasket 11 is placed between metal to metal contacts of both assemblies for ingress protection. Accordingly, the gasket 11 is placed along edges B, see figure 3(a) for reference, of the tap-off opening A, the edges B extending to metal contacts of the top housing assembly 1.2 such that, the flat gasket lies in-between mating metallic surfaces of the ingress protection block and the top housing assembly, the flat gasket 11 further makes contact with metal contacts affixing the side housing assembly 1.1 with the top housing assembly 1.2.
The plug-in-hole base cover 4 is placed in the open gap between two top housing assemblies 1.1 from both sides and the cover’s s 4 movement is restricted by rivet fixing 8 with plug-in location IP cover 1.2. The other end of plug-in location IP cover 1.2.1 is sealed by rivet fixing 8 with top (bottom) enclosure. Due to rivet fixing, deformation due to welding is overridden in plug-in location IP cover 1.2.1. Plug-in-hole cover 5 is fixed with plug-in-hole base cover 4 using screws 9 and flat gasket 11 is applied between metallic contacts.
A sealant 12 is applied on the edge of plug-in-hole base 4 and cover 5 which joints with IP block 1.1.1. The sealant 12 is also applied between at the edge of plug-in location IP cover 1.2.1 wherever it is in contact with top/bottom enclosure 1.1.2 for ingress protection.
Two fluid routers 2.2 are welded on plug-in box rear surface 2.1 towards the top and bottom side. Guide plates 3 are fixed with plug-in box rear surface using nut-bolt 10 pair.
When Plug-in box 2 is inserted into the plug-in point busway 1, then fluid router 2.2 will divert the fluid towards the IP block 1.1.1. IP block 1.1.1 is acting as the outlet for the fluid flowing on the top enclosure 1.1.2 of plug-in point busway 1. The combined effect of fluid router 2.2 welded on the plug-in box rear surface 2.1 and C-shaped IP block 1.1.1 gives the path to the fluid flowing or splashed on the top enclosure to move out of the busway. The Plug-in hole covers 5 and IP block 1.1.1 are assembled such a way that their top surfaces are co-planar. The gap between these metallic coplanar surfaces and the rear surface of plug-in box 2.1 is sealed for ingress by using flat gasket 11. For effectiveness of the gasket plug-in box 2 is fixed with the plug-in feeder using mounting clamp 7. Because of arrangement in the said invention, fluid could not seep inside the plug-in point busway 1 through plug-in point and thereby the possibility of electrical fault is avoided.
Further, when the plug-in box 2 is not inserted in the busway 1, a top cover 6 covers the base cover 5, as shown in Figures 6 and 7. The top cover 6 may be screw fitted to the plug-in-hole cover 5. An additional gasket 11 may be placed along the edges of the metallic contacts between the top cover 6 and the plug-in hole cover 5.
Those skilled in the art will recognize other use cases, improvements, and modification to the embodiments of the present disclosure. All such improvements and other use-cases are considered within the scope of the concepts disclosed herein and the claims that follow.