CLIAMS:1. A PAN assembly configured to distribute three phase and neutral power supply to a number of power control devices within a distribution box, the PAN assembly comprising:
at least one housing configured to hold at least one set of incoming phase bus bars and further configured to hold at least two sets of outgoing phase bus bars, wherein the housing is further configured to provide electrical connectivity between respective phases;
at least one auxiliary cover configured to hold incoming neutral bus bar and more than one outgoing neutral bus bars and provide electrical connectivity there-between, wherein the housing and the auxiliary cover are configured to hold the incoming bus bars of varying cross sections for varying current ratings.
2. The PAN assembly of claim 1, wherein the PAN assembly further comprises at least one cover that is configured to provide protection from direct contact with live bus bars.
3. The PAN assembly of claim 2, wherein the at least one cover incorporates click fit feature.
4. The PAN assembly of claim 1, wherein electrical connectivity between respective phases and neutrals is obtained by joining respective bus bars by one or more screws and one or more spring washers.
5. The PAN assembly of claim 1, wherein the PAN assembly further comprises an end plate to cover the incoming phase bus bars.
6. The PAN assembly of claim 5, wherein the end plate incorporates one or more windows for air circulation and efficient dissipation of heat.
7. The PAN assembly of claim 5, wherein the end plate incorporatesslide lock arrangement.
8. The PAN assembly of claim 1, wherein the auxiliary cover incorporates a flap that is configured to provide insulation to incoming and outgoing neutral bus bars.
9. The PAN assembly of claim 8, wherein the PAN assembly further comprises a main auxiliary cover configured to hold a main neutral bus bar, and wherein the main auxiliary cover is realized from the auxiliary cover by removing the flap.
10. The PAN assembly of claim 1, wherein the PAN assembly is a 4 pole PAN assembly that is realized from a 3 pole PAN assembly by incorporating the auxiliary cover.
,TagSPECI:TECHNICAL FIELD
[0001] The present invention relates generally to low power distribution boards and electric power panels. More particularly the present disclosure pertains to a PAN assembly for distribution of electrical power supply to modular devices in the electrical enclosures.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art
[0003] Electrical energy has serious potential to cause damage and therefore lot of care is taken during design and installation of electricity supply and distribution systems. Distribution boards are a major safety contributor in electrical distribution systems, be it in residential/office premises for domestic/office supply or in industrial applications. A distribution board is a component of the electricity supply system which divides an electrical power feed into subsidiary circuits, and provides protective fuses or/and circuit breakers for each circuit in a common enclosure.Current carrying members of the distribution board such as bus bars, neutral bars and others are mounted on a base pan assembly located within the distribution board. The bus bars serve as a common connection for two or more circuits and may be used to connect circuit breakers to service conductors and load wiring. The bus bars are required to be isolated from each other to prevent short circuiting between phases and phase to ground; and several components and assemblies are needed to isolate the bus bars. Such isolation of bus bars and distribution of power supply to different subsidiary circuitsis normally done through PAN assembly.
[0004] The number of components in PAN assembly required for isolation and to maintain electrical integrity of such distribution boards increases both the complexity and inventory cost. This is particularly true for three pole PAN assembly. Also conventional PAN assemblies have a common neutral and because of this substantial voltage drop and/or excessive temperature rise can be experienced at bus bars. Considerable improvement in transmission efficiency can be achieved by overcoming this limitation. Further, a method enabling conversion of existing three pole PAN assemblies to four pole PAN assemblies for distribution of three phase & neutral supply to modular devices in the electrical enclosure can not only reduce the inventory but also the complexity of design.
[0005] There is therefore a need in the art to design and develop systems and methods by which above shortcomings can be overcome and enhance the safety of distribution boards by making isolation of busbars/earthing arrangement more reliable and dependable.
[0006] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply.
[0007] In some embodiments, the numbers expressing quantities of ingredients, properties such as concentration, reaction conditions, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term “about.” Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
[0008] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0009] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[0010] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all Markush groups used in the appended claims.

OBJECTS OF THE INVENTION
[0011] It is an object of the present disclosure to provide a compact and modular design for four pole PAN assembly which can accommodate three phase supply and neutral using existing three pole PAN assembly.
[0012] It is another object of the present disclosure to provide a compact and modular design for four pole PAN assembly which provides for appropriate creepage and clearance for bus bars through special features in housing of PAN assembly.
[0013] It is another object of the present disclosure to provide a compact and modular design for four pole PAN assembly which provides for special profile in PAN housing to retain a connecting busbar in its position.
[0014] It is another object of the present disclosure to provide a compact and modular design for four pole PAN assembly which provides for an auxiliary cover that can also act as an end cover to protect income neutral connecting bus bar.
[0015] It is another object of the present disclosure to provide a compact and modular design for four pole PAN assembly wherein auxiliary cover provides insulation to incoming neutral and outgoing bus bar.
[0016] It is another object of the present disclosure to provide a compact and modular design for four pole PAN assembly which provides for easy integration of auxiliary cover with main unit.
[0017] It is another object of the present disclosure to provide a compact and modular design for four pole PAN assembly which provides for flexibility to accommodate minor terminal height variations of connecting breakers.
[0018] It is another object of the present disclosure to provide a compact and modular design for four pole PAN assembly with fail safe assembling features.
[0019] It is another object of the present disclosure to provide a compact and modular design for four pole PAN assembly with Poke Yoke features against wrong fixing of housing.
[0020] It is another object of the present disclosure to provide a compact and modular design for four pole PAN assembly which provides for click fit fixing of PAN assembly with base plate.
[0021] It is another object of the present disclosure to provide a compact and modular design for four pole PAN assembly which provides rib features at specific locations on parts of PAN assembly to make a stronger structure and withstand higher forces during short-circuit.
[0022] It is another object of the present disclosure to provide a compact and modular design for four pole PAN assembly which provides windows in end plates for air circulation and faster means for dissipation of heat energy.
[0023] It is another object of the present disclosure to provide a compact and modular design for four pole PAN assembly which provides for slide lock arrangement for ease in assembly of end plates.

SUMMARY
[0024] The present invention relates to a PAN assembly for various types of distribution boards and electric power supply panels and for distribution of electrical power supply to modular devices in the electrical enclosures.
[0025] In an embodiment, a set of the disclosed PAN assembly can comprise of a housing, a cover, an auxiliary cover, a main auxiliary cover and an endplate. One set of these components can cater for two set of outgoing ways of R, Y, B Phases and Neutral.
[0026] In an embodiment, the housing is configured to house incoming bus bars for R,Y & B; neutral main bus bar and two sets of outgoing phase bus bars. The incoming and outgoing bus bars can be fixed with each other through screws and spring washers. Cover is configured to protect any direct contact to live bus bars. The end plate is configured to avoid accidental contact with main bus bars and is configured with number of small windows for better air circulation to reduce temperature rise during distribution of supply from incoming to outgoing circuit. The main auxiliary cover can be configured to house the main neutral busbar.
[0027] In an embodiment, the auxiliary cover is configured to house neutral outgoing busbar and can be placed between two housings for tapping main neutral busbar and also better fitment in overall assembly. In another embodiment, the auxiliary cover can incorporate a flap which can rotate 90° from horizontal of base plate and can be broken for using the auxiliary cover as main auxiliary cover and using as a main auxiliary cover. The auxiliary cover can incorporate three windows for holding incoming bus bars pertaining to three phases (R,Y & B). Below the three main phase busbar windows, one additional window can be provided for incoming neutral bus bar. In an aspect the flap of the auxiliary cover provides proper insulation between neutral busbar and base plate.
[0028] In an embodiment, the number of housings, cover and auxiliary covers is decided according to number of ways for example, for 4 outgoing ways two set of these parts can be used for outgoing phases and neutral circuits. In another aspect the main auxiliary cover and the end plate may not be repeated with each set of housing, cover and auxiliary cover.
[0029] In an embodiment, the disclosed PAN assembly incorporates features that enable accommodating different incoming busbar sizes depending on the desired rating within the same housing and cover.
[0030] In an embodiment, the housing is configured to provide clearance and creepage distance between incoming and outgoing bus bars and separate different live phases and live parts from non-current carrying baseplate. In an aspect when multiple housings are connected with each other, overlapping surface between two consecutive housings helps in maintaining appropriate creepage and clearance.
[0031] In an embodiment, the flexibility of connecting bus bar is achieved through a special profile that accommodates small variations in terminal height of connecting breaker.
[0032] In an embodiment, the cover and the housing incorporate click-fit fixing feature at diagonally opposite location in the cover and the housing for easy fixing and removal of the cover with/from the housing. In addition the cover incorporates PokaYoke features to avoid wrong fixing with the housing.
[0033] In an embodiment, the disclosed PAN assembly incorporates click fit fixing feature for assembly with baseplate of the enclosure. Further the disclosed PAN assembly incorporates ribs at specific locations to make structure strong and withstand high level of forces during short-circuit. Also end plate incorporates sliding lock arrangement for ease of assembly.
[0034] In an embodiment, the PAN assembly can be done outside before mounting on base plate or it can be done directly at the base plate also. After proper placement of incoming bus bars in the middle portion of housings, the outgoing bus bars having clearance hole, can be placed on top of the housings. The incoming neutral bus bar can be placed at bottom of the housings along with auxiliary covers. To support main neutral incoming one main auxiliary cover is placed with main housing. Screws along with spring washer used from the top to fix incoming and outgoing bus bars in the housing and maintaining desired level of contact resistance between joints of two bus bars. In an aspect the joints between simple profile of main and connecting bus bar are of simple profile andsave copper wastage which otherwise cannot be avoided. Joints between the main and the connecting bus bars also reduce insulation requirement between the two bus-bars of different potential and makes the disclosed PAN assembly compact.
[0035] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components

BRIEF DESCRIPTION OF THE DRAWINGS
[0036] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0037] FIG. 1 illustrates an exemplary schematic view of a 4 pole PAN assembly mounted on a base plate in accordance with an embodiment of the present disclosure.
[0038] FIG. 2 illustrates an exemplary schematic view of the4 pole PAN assembly in accordance with embodiments of the present disclosure.
[0039] FIG. 3A and FIG. 3B illustrate exemplary exploded views of the4 pole PAN assembly along with base plate in accordance with embodiments of the present disclosure.
[0040] FIG. 4A and FIG. 4B illustrate exemplary schematic views of an auxiliary cover in accordance with an embodiment of the present disclosure.
[0041] FIG. 5 illustrates an exemplary schematic view of a fully assembled 4 pole circuit breaker assembly integrated with the 4 pole PAN assembly in accordance with embodiments of the present disclosure.

DETAILED DESCRIPTION
[0042] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0043] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.
[0044] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[0045] Embodiments of present disclosure pertain to a PAN assembly that can be used in various types of distribution boards and electric power supply panels for distribution of electrical power supply to modular devices in the electrical enclosures.
[0046] In an embodiment, a set of the disclosed PAN assembly can comprise of a housing, a cover, an auxiliary cover, a main auxiliary cover and an endplate. One set of these components can cater for two set of outgoing ways of R, Y, B Phases and Neutral.
[0047] In an embodiment, the housing is configured to house incoming bus bars for R, Y & B; neutral main bus bar and two sets of outgoing phase bus bars. The incoming and outgoing bus bars can be fixed with each other through screws and spring washers. Cover is configured to protect any direct contact to live bus bars. The end plate is configured to avoid accidental contact with main bus bars and is configured with number of small windows for better air circulation to reduce temperature rise during distribution of supply from incoming to outgoing circuit. The main auxiliary cover can be configured to house the main neutral bus bar.
[0048] In an embodiment, the auxiliary cover is configured to house neutral outgoing busbar and can be placed between two housings for tapping main neutral bus bar and also better fitment in overall assembly. In another embodiment, the auxiliary cover can incorporate a flap which can rotate 90° from horizontal of base plate and can be broken for using the auxiliary cover as main auxiliary cover and using as a main auxiliary cover. The auxiliary cover can incorporate three windows for holding incoming bus bars pertaining to three phases (R,Y & B). Below the three incoming phase busbar windows, one additional window can be provided for incoming neutral bus bar. In an aspect the flap of the auxiliary cover provides proper insulation between neutral busbar and base plate.
[0049] In an embodiment, the number of housings, cover and auxiliary covers is decided according to number of ways for example, for 4 outgoing ways two set of these parts can be used for outgoing phases and neutral circuits. In another aspect the main auxiliary cover and the end plate may not be repeated with each set of housing, cover and auxiliary cover.
[0050] In an embodiment, the disclosed PAN assembly incorporates features that enable accommodating different incoming busbar sizes depending on the desired rating within the same housing and cover.
[0051] In an embodiment, the housing is configured to provide clearance and creepage distance between incoming and outgoing bus bars and separate different live phases and live parts from non-current carrying baseplate. In an aspect when multiple housings are connected with each other, overlapping surface between two consecutive housings helps in maintaining appropriate creepage and clearance.
[0052] In an embodiment, the flexibility of connecting bus bar is achieved through a special profile that accommodates small variations in terminal height of connecting breaker.
[0053] In an embodiment, the cover and the housing incorporate click-fit fixing feature at diagonally opposite location in the cover and the housing for easy fixing and removal of the cover with/from the housing. In addition the cover incorporates PokaYoke features to avoid wrong fixing with the housing.
[0054] In an embodiment, the disclosed PAN assembly incorporates click fit fixing feature for assembly with baseplate of the enclosure. Further the disclosed PAN assembly incorporates ribs at specific locations to make structure strong and withstand high level of forces during short-circuit. Also end plate incorporates sliding lock arrangement for ease of assembly.
In an embodiment, the PAN assembly can be done outside before mounting on base plate or it can be done directly at the base plate also. After proper placement of incoming bus bars in the middle portion of housings, the outgoing bus bars having clearance hole, can be placed on top of the housings. The incoming neutral bus bar can be placed at bottom of the housings along with auxiliary covers. To support main neutral incoming one main auxiliary cover is placed with main housing. Screws along with spring washer used from the top to fix incoming and outgoing bus bars in the housing and maintaining desired level of contact resistance between joints of two bus bars. In an aspect the joints between simple profile of main and connecting bus bar are of simple profile and save copper wastage which otherwise cannot be avoided. Joints between the main and the connecting bus bars also reduce insulation requirement between the two bus-bars of different potential and makes the disclosed PAN assembly compact.
[0055] It is to be understood that though the embodiments of the present disclosure have been explained with reference to a 4 pole PAN assembly in a distribution board/distribution box with four way distribution, the application of the disclosed PAN assembly is not restricted to 4 pole or four way distribution or any particular type of distribution board/distribution box. The4 pole PAN assembly of the present disclosure can be implemented on any type of distribution board such as DB boards, ACDB (alternating current distribution boards), DCDB (direct current distribution boards), power breakers, panel boards, breaker box, fuse box, electric board, fuse board, consumer unit (CU), circuit breaker panel, breaker panel, electrical supply panels, etc. for distribution of power in any number of ways and in less than 4 pole applications also.
[0056] Embodiments of the present disclosure and their advantages can be best understood by reference to attached drawings.
[0057] FIG. 1 illustrates an exemplary schematic view 100 of a 4 pole PAN assembly 102, also interchangeably referred to as PAN assembly, mounted on a base plate 104 in accordance with an embodiment of the present disclosure wherein the base plate 104 can pertain to an electrical enclosure such as but not limited to a distribution board (not shown). The PAN assembly 102 can distribute an incoming power supply comprising three phases and neutral to different feeder circuits. In an embodiment the PAN assembly 102 can have click fitting feature for its assembly on the base plate 104 for ease of assembly and removal.
[0058] FIG. 2 illustrates an exemplary schematic view 200 of the4 pole PAN assembly 102 in assembled condition in accordance with an embodiment of the present disclosure. As shown therein PAN assembly 102 can have four outgoing connections. In an embodiment one set of components of the PAN assembly 102 can provide two outgoing connections each comprising R, Y and B phases and neutral with one outgoing way on either side of the PAN assembly. The exemplary PAN assembly 102 depicted in view 200 of the FIG. 2 is made from two set of components. Also shown in the view 200 are other parts of the disclosed PAN assembly 102 such as auxiliary cover(s) 202-1, 202-2 and 202-3, collectively referred as auxiliary cover 202 hereinafter, a clamp 204, outgoing neutral bus bars 206, incoming phase bus bars 208-1, 208-2 and 208-3, collectively and referred to as incoming phase bus bar 208 hereinafter, end plate 210 and cover 212-1 and 212-2, collectively referred to as cover 212 hereinafter. In an aspect, configuration of auxiliary cover 202 can be different when used during assembly at position 202-1 and at positions 202-2 and 202-3 wherein a flap (described subsequently at FIG. 4A and FIG. 4B) can be broken at a triangular slot during assembly for fitment in position 202-1 (also referred to as main auxiliary cover). For positions such as 202-2 and 202-3, the auxiliary cover 202 can be assembled/used in full basic configuration (with flap in intact condition). In another aspect, auxiliary cover 202 can be manufactured by a process such as but not limited to molding.
[0059] In an aspect, cover 212can incorporate click fit feature for easy fitting and removal and can provide protection against any direct contact between live bus bars.
[0060] FIG. 3A and FIG. 3B illustrate exemplary exploded views300 and 350 of the4 pole PAN assembly102 and the base plate 104in accordance with an embodiment of the present disclosure wherein exemplary PAN assembly 102 of the present disclosure can consist of a housing 304 which houses/accommodates incoming bus bars 208-1, 208-2 and 208-3 (collectively referred to as incoming bus bar 208 hereinafter). Their position is also marked as R, Y and B on the cover 212 for easy identification. The PAN assembly can further incorporate neutral main bus bar 310, outgoing phase bus bars 302-1, 302-2 and 302-3 (collectively referred to as outgoing phase bus bar302 hereinafter) and outgoing neutral bus bar 206.In an aspect, bus bars can be fixed with each other through screw 306 and spring washers (not shown) and cover 212-1 an 212-2, (collectively referred to as cover 212 hereinafter) can provide protection against any direct contact between live bus bars. End plate 308 can be provided to avoid accidental contact with main bus bar. In another aspect, end plate 308 can be provided with number of small windows to allow for better air circulation, for dissipation of heat energy and to prevent temperature arising during distribution of supply from incoming to outgoing power supply circuits.
[0061] In an aspect the housing 304, the cover 212 and end cover 308 can belong to an existing design of 3 pole PAN assembly and addition of the auxiliary cover 202 facilitates conversion of the existing design 3 pole PAN assembly to a 4 pole PAN assembly by providing means to distribute neutral phase.
[0062] In an embodiment, the PAN assembly 102 can be assembled outside before mounting on the base plate 104 or it can be assembled directly at the base plate 104 also. After proper placement of incoming phase bus bars 208 in the middle portion of the housings 304, the outgoing bus bars 302 having clearance hole, can be placed on top of the housings 304. The incoming neutral bus bar 208 can be placed at bottom of the housings304 along with auxiliary covers 202. To support main neutral incoming 310 one main auxiliary cover 202-1 is placed with main housing 304-1. Screws 306 along with spring washer (not shown) can befitted from the top to fix incoming and outgoing bus bars in the housing 304 and maintaining desired level of contact resistance between joints of two bus bars. In an aspect the joints between simple profile of main and connecting bus bar are of simple profile and save copper wastage which otherwise cannot be avoided. Joints between the main and the connecting bus bars also reduce insulation requirement between the two bus-bars of different potential and makes the disclosed PAN assembly compact.
[0063] In an aspect, auxiliary cover 202 having neutral outgoing bus bar 206 can be positioned between two main housings 304 for tapping neutral path and can also provide for better fitment in overall assembly. In another aspect, number of auxiliary covers 202 in any PAN assembly can depend on the number of ways required to be provided in PAN assembly. In an aspect, for 4 ways, two auxiliary cover 202 can be provided for outgoing phases R, Y and B and neutral circuit. In another aspect, flexibility in connecting bus bars 206 and 302 can be achieved by a special profile to accommodate small variations in terminal height of connecting breakers. It is two be understood that exemplary example has been using only two housings and two covers only to explain the embodiment in a simple manner whereas number of housing 304, cover 212 and auxiliary cover 202 can be used in cascading manner to have multiple desirable configurations. In another aspect, clearance and creepage distance of incoming bus bars 208 and 310 and outgoing bus bars 206 and 302 can be provided through specially designed housing 304 which can separate different live phases and live parts from non-current carrying base plate 104. In yet another aspect, overlapping surfaces between two consecutive housings 304 can help in maintaining required creepage and clearance when multiple PAN housing are connected with each other.
[0064] In an embodiment, the flexibility of connecting bus bar is achieved through a special profile that accommodates small variations in terminal height of connecting breaker.
[0065] In an embodiment, the cover and the housing incorporate click-fit fixing feature at diagonally opposite location in the cover and the housing for easy fixing and removal of the cover with/from the housing. In addition the cover incorporates PokaYoke features to avoid wrong fixing with the housing.
[0066] In an embodiment, the disclosed PAN assembly incorporates click fit fixing feature for assembly with baseplate of the enclosure. Further the disclosed PAN assembly incorporates ribs at specific locations to make structure strong and withstand high level of forces during short-circuit. Also end plate incorporates sliding lock arrangement for ease of assembly.
[0067] In an embodiment the PAN assembly 102 can incorporate features that enable accommodating different incoming busbar sizes depending on the desired rating within the same housing and cover. In an aspect, cross-section size of main bus bar 208 and 310 can increase proportionately with increase in current rating. For example size of main bus bar can double as current rating increases from 125A to 250A.
[0068] FIG. 4A and FIG. 4B illustrate exemplary schematic views 400 and 450 of the auxiliary cover 202 in accordance with an embodiment of the present disclosure wherein auxiliary cover 202 can have a flap 402 which can have freedom of rotation by approximately 900 with respect to its base. Auxiliary cover 202 can be provided with three windows 404 for holding incoming phase bus bars (R, Y and B) in one line and an additional window 406 for holding incoming neutral bus bar. In an aspect, flap 402 integrated with auxiliary cover 202 can provide proper insulation between neutral bus bar 310 (not shown) and base plate 104 (not shown). In yet another aspect, auxiliary cover 202 can be provided with a triangular slot 408 which can allow breaking of flap 402 for use of auxiliary cover 202 as a main cover such as in position 202-1.
[0069] In an aspect, configuration of auxiliary cover 202 can be different when used during assembly at position 202-1 and at positions 202-2 and 202-3 wherein flap 402 can be broken at triangular slot 408 during assembly at position 202-2 and 202-3 and auxiliary cover 202 can be assembled/used in full basic configuration (with flap 402 in intact condition) when assembled/used at position 202-1. In another aspect, auxiliary cover 202 can be manufactured by a process such as but not limited to molding.
[0070] FIG. 5 illustrates an exemplary schematic view of a fully assembled 4 pole circuit control panel/distribution box assembly 500 integrated with 4 pole PAN assembly 102 on base plate 104 in accordance with an embodiment of the present disclosure wherein a 4 pole PAN assembly 102 has been integrated with a four pole circuit breaker-MCB 502 through outgoing bus bars 206 and 302. In an aspect, half din rail 504 can be used to locate and hold modular circuit breakers.
[0071] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION
[0072] The present disclosure provides a compact and modular design for four pole PAN assembly which can accommodate three phase supply and neutral using existing three pole PAN assembly.
[0073] The present disclosure provides a compact and modular design for four pole PAN assembly which provides for appropriate creepage and clearance for bus bars through special features in housing of PAN assembly.
[0074] The present disclosure provides a compact and modular design for four pole PAN assembly which provides for special profile in PAN housing to retain a connecting busbar in its position.
[0075] The present disclosure provides a compact and modular design for four pole PAN assembly which provides for an auxiliary cover that can also act as an end cover to protect income neutral connecting bus bar.
[0076] The present disclosure provides a compact and modular design for four pole PAN assembly wherein auxiliary cover provides insulation to incoming neutral and outgoing bus bar.
[0077] The present disclosure provides a compact and modular design for four pole PAN assembly which provides for easy integration of auxiliary cover with main unit.
[0078] The present disclosure provides a compact and modular design for four pole PAN assembly which provides for flexibility to accommodate minor terminal height variations of connecting breakers.
[0079] The present disclosure provides a compact and modular design for four pole PAN assembly with fail safe assembling features.
[0080] The present disclosure provides a compact and modular design for four pole PAN assembly with Poke Yoke features against wrong fixing of housing.
[0081] The present disclosure provides a compact and modular design for four pole PAN assembly which provides for click fit fixing of PAN assembly with base plate.
[0082] The present disclosure provides a compact and modular design for four pole PAN assembly which provides rib features at specific locations on parts of PAN assembly to make a stronger structure and withstand higher forces during short-circuit.
[0083] The present disclosure provides a compact and modular design for four pole PAN assembly which provides windows in end plates for air circulation and faster means for dissipation of heat energy.
[0084] The present disclosure provides a compact and modular design for four pole PAN assembly which provides for slide lock arrangement for ease in assembly of end plates.