FORM 2
The Patents Act 1970
(39 of 1970)
&
The Patent Rules 2003
COMPLETE SPECIFICATION
(See Section 10 and rule 13)
TITLE OF THE INVENTION:
DISTRIBUTION BUS SYSTEM FOR FEEDER MODULES IN ELECTRICAL
SWITCHGEAR ASSEMBLIES
APPLICANT:
LARSEN & TOUBRO LIMITED
L&T House, Ballard Estate, P.O. Box No. 278,
Mumbai, 400 001, Maharashtra. INDIA.
PREAMBLE OF THE DESCRIPTION:
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED

A) TECHNICAL FIELD OF THE INVENTION
[0001] The present invention generally relates to a power distribution system and particularly to the power distribution system in switchgear assemblies. The present invention more particularly relates to a power distribution bus system for the feeder modules of electrical switchgear assemblies.
B) BACKGROUND OF THE INVENTION
[0002] Moulded Case Circuit Breakers (MCCB) are widely used in all types of low-voltage switchboards and panel boards. The MCCB are available in the ratings from 15 amps to 3000 amps. The breaker mechanism in the MCCB is totally sealed within an external moulded case. When the MCCB has a failure or problem, it must be replaced and cannot be repaired. These MCCBs are typically bolted onto the switchboard bus or provided with plug-in designs. The removal or addition of MCCBs to a switchboard should only take place with the switchboard power turned off.
[0003] The MCCB switchboard is used to direct electrical power from a main power source to other parts of the system. The switchboard is the assembly of panels which include switches and electrical contacts that allow the electrical power to be redirected. The amount of electrical power fed into the switchboard must always equal to the electrical power drawn out to the loads. The switchboard includes a group of bus bars which are generally wide strips of copper to which the switchgear is connected. These bus bars allow the flow of large currents through the switchboard.
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The bus bars are supported by insulators since the bus bars have a potential severe electrocution hazard.
[0004] The electrical power contacts are arranged on the rear of the control unit of the switchboard. The electrical power contact is connected to the bus bar arranged on the panel frame of the switchboard, through which the electrical power is supplied to each on-board piece of the system. However, it is often desired to protect and isolate components at high potential from unwanted connection with tools, dust or other contaminating material and pests such like insects or rodents. Hence there is a need to develop a distribution bus system which can be housed inside a sheet of metallic enclosure.
[0005] In the existing switchboards, a plurality of feeder modules is operated via a power feeder. To do this, each feeder module has an individual associated power distribution bus system to make connection with the power feeder. In this case, the power bus systems are connected to one another to form a continuous distribution rail. Hence there is a requirement to provide a distribution bus system which works as a common power supply and distributes power to a plurality of the feeder modules of the various downstream devices in the switchboards.
[0006] The existing distribution bus systems are non-modular which can be used in a particular type of the feeder module only. Hence there is a requirement for a modular distribution bus system for supplying the electrical power to the fractional feeder modules such as quarter-width module, half-width module and full width module.
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[0007] The abovementioned shortcomings, disadvantages and problems are addressed herein and which will be understood by reading and studying the following specification.
C) OBJECTS OF THE INVENTION
[0008] The primary object of the present invention is to develop a distribution bus system for feeder modules in the switch gear assemblies for distributing the electrical power into and out of the fractional feeder modules in the switchgear assemblies.
[0009] Another object of the present invention is to develop a distribution bus system which works as an interface between the incoming side power distribution system and the fractional feeder modules.
[0010] Yet another object of the present invention is to develop a distribution bus system to feed electrical power to pluralities of the fractional power modules from the same common power distribution system.
[0011] Yet another object of the present invention is to develop a distribution bus system for feeding the electrical power to various types of fractional feeder modules such as full width module, half width module, quarter width module etc.
[0012] Yet another object of the present invention is to develop a distribution bus system provided with a mini-bus type construction for the incoming power supply.
[0013] These and other objects and advantages of the present invention will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings.
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D) SUMMARY OF THE INVENTION
[0014] The various embodiments of the present invention provide a distribution bus system for distributing electrical power into and out of the fractional feeder modules in switchgear assemblies. According to one embodiment of the present invention, a distribution bus system for feeder modules in electrical switch gear assemblies has an incoming side contact system connected to pluralities of vertical bus bars to draw the electrical power from the mains. Pluralities of bus strips are electrically connected to the incoming side contact system. The pluralities of the bus strips are arranged in a bus rack. An outgoing side contact system is electrically connected to the pluralities of bus strips. Pluralities of feeder modules are electrically connected to the outgoing side contact system. A cable termination arrangement is electrically connected to the pluralities of bus strips. An end load device is connected to the cable termination arrangement. The bus strips act an interface between the incoming side contact system and the outgoing side contact system. The pluralities of bus strips receive and forward the incoming electrical power to the pluralities of the feeder modules and receive the electrical power coming out of the pluralities of the feeder modules for feeding to the end load devices through the cable termination arrangement.
[0015] The incoming side contact system has pluralities of contacts to receive an incoming electrical power from the mains through pluralities of vertical bus bars. The incoming side contact system has copper flex braids connected between the pluralities of contacts and the bus strips to pass the incoming electrical power to the bus strips.
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[0016] The bus strips are arranged horizontally in the bus rack. The bus strips are connected to the outgoing side contact system through conductive links such as copper links. The bus rack has pluralities of support brackets to support and hold the pluralities of the bus strips respectively. The bus rack and the bus strips are stored in an insulated box.
[0017] The outgoing side contact system has pluralities of main contacts and auxiliary contacts to mat with the respective main contacts and the auxiliary contacts in the pluralities of feeder modules. The main contacts in the outgoing side contact system have contacts arranged in two different rows. The main contacts arranged in the first row mate with respective main contacts in the feeder modules to supply electrical power to the feeder modules. The main contacts arranged in the second row mate with respective main contacts in the feeder modules to receive the electrical power from the feeder modules for feeding into the end load devices. The outgoing side contact system has an auxiliary contact plate provided with auxiliary contacts to mate with the auxiliary contacts on the feeder modules. The feeder module is a full width module or a half width module or a quarter width module.
[0018] According to one embodiment of the present invention, the distribution bus system includes an incoming side contact system, a bus rack housing one or more bus strips and a contact system on the feeder module side. The incoming side contact system includes individual contacts housed within the system that are used to absorb specified mismatch of mating contacts by swivelling sidewise when the incoming side contact system is inserted with main distribution bus bars. The incoming side contact system is mounted lengthwise as well as horizontally on one edge of the bus rack in such a way that the individual contacts of the incoming side contact system become
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perpendicular to the bus strips mounted on the bus rack. On the other edge of the bus rack, a plate is mounted in perpendicular to the bus rack to support the contact system on the feeder module side. The bus strips of the bus rack are connected to the incoming side contact system and the contact system on the feeder module side through links such like copper links.
[0019] The contact system on the feeder module side includes one or more main contacts mounted on a main contact plate in two rows and one or more auxiliary contacts mounted on an auxiliary contact plate. The main contacts arranged in the first row are used to draw the electrical power from the bus rack and to feed to the incoming side contacts of the feeder module. The main contacts provided in the second row are used to draw the output power from the outgoing side contacts of the feeder module and to feed to the devices for customer termination through the cable alley for customer cable terminations in the switchboards.
[0020] The incoming side power contact system draws the electrical power from the main distribution bus bars through the individual contacts and feeds power to the bus rack. The power is passed through the entire length of the bus strips in the bus rack. The bus rack works as a common power supply and distributes the electrical power to each feeder module through the contact system on the feeder module side. The main contacts provided in the first row at the contact system on the feeder module side draws the electrical power from the bus rack and feeds to the incoming side contacts of the feeder module. The output power is drawn from the outgoing side contacts of each feeder module through main contacts provided in the second row at the contact system on the feeder module side and fed to the end load devices through the customer termination in the cable alley attached to the bus rack.
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[0021] According to one embodiment, the entire distribution bus system is housed inside a metallic sheet of enclosure to achieve isolation. Each contact plate of the contact system on the feeder module side is provided with one or more cylindrical projections that are used to absorb the mismatch over all the contact positions of the mating contacts in orthogonal directions, when the feeder module is inserted. The distribution bus system is a modular system which is used for various types of feeder modules such like quarter-width module, half-width module, full width module etc.
E) BRIEF DESCRIPTION OF THE DRAWINGS:
[0022] The other objects, features and advantages will occur to those skilled in the art from the following description of the preferred embodiment and the accompanying drawings in which;
[0023] FIG. 1 illustrates a top side perspective view of a distribution bus system for the feeder modules in switchgear assemblies according to one embodiment of the present invention.
[0024] FIG. 2 illustrates an exploded perspective view of an incoming side contact system and distribution bus arrangement in the distribution bus system for the feeder modules in switchgear assemblies according to one embodiment of the present invention.
[0025] FIG. 3 illustrates a side perspective view of an outgoing side contact system in the distribution bus system for the feeder modules in switchgear assemblies according to one embodiment of the present invention.
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[0026] FIG. 4 illustrates an exploded side perspective view of the outgoing side contact system in the distribution bus system for the feeder modules in switchgear assemblies according to one embodiment of the present invention.
[0027] FIG. 5 illustrates a top perspective view of the distribution bus system for the feeder modules in switchgear assemblies with cover enclosed condition according to one embodiment of the present invention.
[0028] FIG. 6 illustrates a top perspective view of a distribution bus system for the feeder modules in switchgear assemblies according to one embodiment of the present invention.
[0029] FIG. 7 illustrates a front side perspective view of a distribution bus system for the feeder modules in switchgear assemblies in a cover enclosed condition according to one embodiment of the present invention.
[0030] Although the specific features of the present invention are shown in some drawings and not in others. This is done for convenience only as each feature may be combined with any or all of the other features in accordance with the present invention.
F) DETAILED DESCRIPTION OF THE INVENTION
[0031] In the following detailed description, a reference is made to the accompanying drawings that form a part hereof, and in which the specific embodiments that may be practiced is shown by way of illustration. These embodiments are described in sufficient detail to enable those skilled in the art to
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practice the embodiments and it is to be understood that the logical, mechanical and other changes may be made without departing from the scope of the embodiments. The following detailed description is therefore not to be taken in a limiting sense.
[0032] The various embodiments of the present invention provide a distribution bus system for distribution of power into and out of the fractional feeder modules in switchgear assemblies. According to one embodiment of the present invention, a distribution bus system for feeder modules in electrical switch gear assemblies has an incoming side contact system connected to pluralities of vertical bus bars to draw the electrical power from the mains. Pluralities of bus strips are electrically connected to the incoming side contact system. The pluralities of the bus strips are arranged in a bus rack. An outgoing side contact system is electrically connected to the pluralities of bus strips. Pluralities of feeder modules are electrically connected to the outgoing side contact system. A cable termination arrangement is electrically connected to the pluralities of bus strips. An end load device is connected to the cable termination arrangement. The bus strips act an interface between the incoming side contact system and the outgoing side contact system. The pluralities of bus strips receive and forward the incoming electrical power to the pluralities of the feeder modules and receive the electrical power coming out of the pluralities of the feeder modules for feeding to the end load devices through the cable termination arrangement.
[0033] The incoming side contact system has pluralities of contacts to receive an incoming electrical power from the mains through pluralities of vertical bus bars. The incoming side contact system has copper flex braids connected between the pluralities of contacts and the bus strips to pass the incoming electrical power to the bus strips.
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[0034] The bus strips are arranged horizontally in the bus rack. The bus strips are connected to the outgoing side contact system through conductive links such as copper links. The bus rack has pluralities of support brackets to support and hold the pluralities of the bus strips respectively. The bus rack and the bus strips are stored in an insulated box.
[0035] The outgoing side contact system has pluralities of main contacts and auxiliary contacts to mate with the respective main contacts and the auxiliary contacts in the pluralities of feeder modules. The main contacts in the outgoing side contact system have contacts arranged in two different rows. The main contacts arranged in the first row mate with respective main contacts in the feeder modules to supply the electrical power to the feeder modules. The main contacts arranged in the second row mate with respective main contacts in the feeder modules to receive the electrical power from the feeder modules for feeding into the end load devices. The outgoing side contact system has an auxiliary contact plate provided with auxiliary contacts to mate with the auxiliary contacts on the feeder modules. The feeder module is a full width module or a half width module or a quarter width module.
[0036] According to one embodiment of the present invention, the distribution bus system includes an incoming side power contact system, a bus rack housing one or more bus strips and a contact system on the feeder module side.
[0037] The incoming side contact system includes one or more individual contacts housed within the system. The incoming side contact system is mounted lengthwise as well as horizontally on one edge of the bus rack in such a way that the individual contacts of the incoming side contact system become perpendicular to the bus strips mounted on the bus rack. The individual contacts are used to absorb the specified
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mismatch of the mating contacts by swivelling sidewise, when the incoming side contact system is inserted with the main distribution bus bars. On the other edge of the bus rack, a plate is mounted in perpendicular to the bus rack to support the contact system on the feeder module side. The bus strips of the bus rack are connected to the incoming side contact system and the contact system on feeder module side through links such as copper links. According to one embodiment of the present invention, the bus strips mounted on the bus rack are L-shaped bus strips.
[0038] The contact system on the feeder module side includes one or more main contacts and one or more auxiliary contacts. The main contacts are mounted on a main contact plate in two rows and the auxiliary contacts are mounted on an auxiliary contact plate. The main contacts arranged in the first row are used to draw the electrical power from the bus rack through the links such as copper links and to feed to the incoming side contacts of the feeder module. The main contacts provided in the second row are used to draw the output power from the outgoing side contacts of the feeder module and to feed to the devices for customer termination through the cable alley.
[0039] Further each main contact plate and each auxiliary contact plate of the contact system on the feeder module side is provided with one or more projections. The projections are used to absorb the mismatch of over all the contact positions of the mating contacts in orthogonal directions when the feeder module is inserted into the contact system on the feeder module side. Also the contact system on the feeder module side is supported by support brackets.
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[0040] When the distribution bus system is connected to the main distribution bus bars, the incoming side contact system draws the electrical power from the main distribution bus bars through the individual contacts and feeds the electrical power to the bus rack. The power is passed through the entire length of the bus strips in the bus rack. The bus rack works as a common power supply and distributes the power to each feeder module through the contact system on the feeder module side. The main contacts provided in the first row at the contact system on the feeder module side are used to draw the electrical power from the bus rack and to feed to the incoming side contacts of the feeder module. The output electrical power is drawn from the outgoing side contacts of each feeder module by the main contacts provided in the second row at the contact system on the feeder module side and fed to the devices for customer termination in the cable alley through the bus rack.
[0041] According to one embodiment, the entire distribution bus system is housed inside a metallic sheet of enclosure. The metallic sheet of enclosure is used to protect and isolate the distribution bus system components at high potential from unwanted connection with tools dust or other contaminating material and pests such like insects or rodents. The distribution bus system is a modular system which is used for various types of fractional feeder modules such like quarter-width modules, half-width module, full width module etc.
[0042] FIG. 1 illustrates a top side perspective view of a distribution bus system for the feeder modules in switchgear assemblies according to one embodiment of the present invention. With respect to FIG. 1, the distribution bus system 100 includes an incoming side contact system 102, a bus rack 104 and a contact system on the feeder module side 106. The incoming side contact system 102 is mounted lengthwise as
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well as horizontally on one edge of the bus rack 104. The incoming side contact system 102 is connected to the main distribution bus bars 108. On the other edge of the bus rack 104, the contact system on feeder module side 106 is mounted. Further the contact system on the feeder module side 106 is supported by the support brackets 110.
[0043] When the incoming side contact system 102 is connected to the main distribution bus bars 108, the incoming side contact system 102 draws the electrical power from the main distribution bus bars 108 and feeds to the bus rack 104. Then the contact system on the feeder module side 106 draws the power from the bus rack 104 and feeds to feeder modules. Further the contact system on the feeder module side 106 draws the output power from the feeder modules and feeds to the devices for customer termination in the cable alley.
[0044] FIG. 2 illustrates an exploded perspective view of an incoming side contact system and distribution bus arrangement in the distribution bus system for the feeder modules in switchgear assemblies according to one embodiment of the present invention. With respect to FIG. 2, the incoming side contact system includes one or more individual contacts 202 housed within the system. The individual contacts 202 are used to absorb the specified mismatch of mating contacts by swivelling sidewise when the incoming side contact system 102 is inserted with the main distribution bus bars 108. Further the bus rack 104 includes one or more bus strips 204. The bus strips 204 are mounted in lengthwise to the bus rack 104. Also the bus strips 204 are mounted perpendicular to the individual contacts 202 of the incoming side contact system 102. According to one embodiment of the present invention, the bus strips 204 are L-shaped bus strips. The bus strips 204 of the bus rack 104 are connected to the
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incoming side contact system 102 and the contact system on the feeder module side through links such as copper links 206. The copper links 206 are used to carry the electrical power from the bus strips 204 to the contact system on the feeder module side. Thus the bus rack 104 works as a common power supply and distributes power to the feeder modules of the various downstream devices.
[0045] FIG. 3 illustrates a back side perspective views of an outgoing side contact system in the distribution bus system for the feeder modules in switchgear assemblies according to one embodiment of the present invention. With respect to FIG. 3, the contact system on the feeder module side 106 includes one or more main contacts 302 and one or more auxiliary contacts 304. The main contacts 302 are mounted on a main contact plate 306 in two rows and the auxiliary contacts 304 are mounted on an auxiliary contact plate 308 in the contact system on the feeder module side 106. The main contacts 302 arranged in the first row of the contact system are used to draw the electrical power from the bus strips in the bus rack through links such as copper links and feeds to the incoming side contacts of the feeder module. The main contacts 302 provided in the second row are used to draw the output electrical power from the outgoing side contacts of the feeder module and to feed to the devices for customer termination through the cable alley.
[0046] Further each main contact plate 306 of the contact system on the feeder module side 106 is provided with one or more projections 3101. Each auxiliary contact plate 308 is provided with one or more projections 3102. The projections 3101 and 3102 are used to absorb the mismatch of over all the contact positions of the mating contacts in orthogonal directions, when the feeder module is inserted into the contact system on the feeder module side 106.
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[0047] FIG. 4 illustrates an exploded side perspective views of the outgoing side contact system in the distribution bus system for the feeder modules in switchgear assemblies according to one embodiment of the present invention. With respect to FIG. 4, the bus rack 104 includes one or more bus strips 204. The bus strips 204 are mounted in lengthwise to the bus rack 104. According to one embodiment of the present invention, the bus strips 204 are L-shaped bus strips. The bus strips 204 of the bus rack 104 are connected to the contact system on the feeder module side 106 through links such as copper links 206. The copper links are used to carry the electrical power from the bus strips 204 to the contact system on the feeder module side 106. The bus rack 104 works as a common power supply and distributes electrical power to the feeder modules of the various downstream devices.
[0048] Further the contact system on the feeder module side 106 includes one or more main contacts mounted on the main contact plate in two rows and one or more auxiliary contacts mounted on the auxiliary contact plate. The main contacts provided in the first row at the contact system on the feeder module side 106 are used to draw the electrical power from the bus strips 204 in the bus rack 104 through links such as copper links and feeds to the incoming side contacts of the feeder module. The main contacts provided in the second row at the contact system on the feeder module side 106 are used to draw the output electrical power from the outgoing side contacts of the feeder module and to feed to the devices for customer termination through the cable alley.
[0049] FIG. 5 illustrates a top perspective view of the distribution bus system for the feeder modules in switchgear assemblies with cover enclosed condition according to
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one embodiment of the present invention. With respect to FIG. 5, when the distribution bus system 100 is connected to the main distribution bus bars 108, the individual contacts 202 in the incoming side contact system 102 draw electrical power from the main distribution bus bars 108 and feed the electrical power to the bus rack 104. The electrical power is passed through the entire length of the bus strips in the bus rack 104. The bus rack 104 works as a common power supply and distributes the electrical power to each feeder module through the contact system on feeder module side 106. The main contacts provided in the first row at the contact system on the feeder module side 106 draw the electrical power from the bus strips 204 of the bus rack 104 through the copper links and feed the electrical power to the incoming side contacts of the feeder module. The output electrical power is drawn from the outgoing side contacts of each feeder module by the of main contacts provided in the second row at the contact system on the feeder module side 106 and fed to the devices for customer termination in the cable alley.
[0050] FIG. 6 illustrates a top perspective view of a distribution bus system for the feeder modules in switchgear assemblies according to one embodiment of the present invention. With respect to FIG. 6, when the distribution bus system 100 is connected to the main distribution bus bars 108, the individual contacts 202 in the incoming side power contact system 102 draw the electrical power from the main distribution bus bars 108 and feed the electrical power to the bus rack. The electrical power is passed through the entire length of the bus strips 204 in the bus rack. The bus rack works as a common power supply and distributes the electrical power to each feeder module through the contact system on the feeder module side 106.
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[0051] One set of power contacts provided in the first row of the contact system on feeder module side 106 draws the electrical power from the bus strips 204 through the copper links 206 and feeds to the incoming side contacts of the feeder module. The output power is drawn from the outgoing side contacts of each feeder module by another set of power contacts provided in the second row of the contact system on the feeder module side 106 and fed to the devices for customer termination in the cable alley.
[0052] FIG. 7 illustrates a front side perspective view of a distribution bus system for the feeder modules in switchgear assemblies in a cover enclosed condition according to one embodiment of the present invention.
With respect to FIG. 7, the entire distribution bus system 100 is enclosed with a metallic sheet enclosure 702. The metallic sheet of enclosure 702 protects and isolates the components of the distribution bus system 100 which are running at high potential, from the unwanted connection with tools, dust or other contaminating material and pests such as insects or rodents. The distribution bus system 100 is a modular system which is used for various types of fractional feeder modules such as quarter-width modules, half-width modules, full width modules etc.
G) ADVANTAGES OF THE INVENTION
[0053] The various embodiments of the present invention provide a distribution bus system for distributing power into and out of the fractional feeder modules of switchboards. The distribution bus system works as a common power supply which distributes power to a plurality of the feeder modules of the various downstream devices in the switchboards. The distribution bus system provides a provision to
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accommodate a plurality of auxiliary contacts for each fractional feeder module. The distribution bus system absorbs the mismatch between the individual set of mating contacts and requirements of isolation between adjacent contacts.
[0054] Further the distribution bus system is modular which is used for quarter-width as well as half-width feeder modules. Due to the modularity feature, two quarter-width modules can be replaced by a half-width module and vice versa. The distribution bus system is housed inside a metallic sheet enclosure which protects and isolates the components at high potential, from unwanted connection with tools, dust or other contaminating material and pests such as insects or rodents.
[0055] Although the invention is described with various specific embodiments, it will be obvious for a person skilled in the art to practice the invention with modifications. However, all such modifications are deemed to be within the scope of the claims.
[0056] It is also to be understood that the following claims are intended to cover all of the generic and specific features of the present invention described herein and all the statements of the scope of the invention which as a matter of language might be said to fall there between.

Place: Bangalore RAKESH PRABHU
Date: 31 July 2009 Patent Agent
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CLAIMS What is claimed is:
1. A distribution bus system for feeder modules in electrical switch gear
assemblies comprising:
an incoming side contact system;
pluralities of bus strips electrically connected to the incoming side contact
system;
a bus rack to accommodate the pluralities of the bus strips;
a cable termination arrangement electrically connected to the pluralities of bus
strips;
an outgoing side contact system electrically connected to the pluralities of bus
strips;
pluralities of feeder modules electrically connected to the outgoing side
contact system; and
end load devices connected to the cable termination arrangement;
wherein the pluralities of bus strips receive and forward the incoming
electrical power to the pluralities of the feeder modules and receive the
electrical power coming out of the pluralities of the feeder modules for feeding
to the end load devices through the cable termination arrangement.
2. The system according to claim 1, wherein the incoming side contact system
has pluralities of contacts to receive an incoming electrical power from the
mains through a plurality of vertical bus bars.
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3. The system according to claim 1, wherein the incoming side contact system has copper flex braids connected between the pluralities of contacts and the bus strips to pass the incoming electrical power to the bus strips.
4. The system according to claim 1, wherein the bus strips are arranged horizontally in the bus rack.
5. The system according to claim 1, wherein bus strips are connected to the outgoing side contact system through conductive links.
6. The system accordmg to claim 1, wherein the conductive links are copper links.
7. The system according to claim 1, wherein the bus rack has pluralities of support brackets to support and hold the pluralities of the bus strips respectively.
8. The system according to claim 1, further comprises an insulative box to store the bus rack and the bus strips.
9. The system according to claim 1, wherein the outgoing side contact system has pluralities of main contacts and auxiliary contacts to mate with the respective main contacts and the auxiliary contacts in the pluralities of feeder modules.
10. The system according to claim 1, wherein the main contacts in the outgoing side contact system have contacts arranged in two different rows.
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11. The system according to claim 1, wherein the main contacts arranged in the
first row mate with respective main contacts in the feeder modules to supply
electrical power to the feeder modules.
12. The system according to claim 1, wherein the main contacts arranged in the
second row mate with respective main contacts in the feeder modules to
receive the electrical power from the feeder modules for feeding into the end
load devices.

Place: Bangalore RAKESH PRABHU
Date: 31 July 2009 Patent Agent
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13. The system according to claim 1, wherein the feeder module is a full width module.
14. The system according to claim 1, wherein the feeder module is a half width module.
15. The system according to claim 1, wherein the feeder module is a quarter width module.
16. The system according to claim 1, wherein the bus strips act as an interface between incoming side contact system connected to the vertical bus bars and the outgoing side contact system connected to pluralities of the feeder modules.