CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This patent application is related to and claims the benefit of priority from the Indian Provisional Patent Application with Serial No. 201711029210 titled “A SCALABLE MODULAR POWER SUPPLY RACK”, filed on August 17, 2017 and subsequently Post-dated by 2 months to October 17, 2017, and the contents of which are incorporated in entirety by the way of reference.

A) TECHNICAL FIELD
[0002] The present invention is related to a field of power management system. It is particularly related to a power supply rack. The present invention is more particularly related to a scalable modular power supply rack configured for accepting pluggable power supply modules.

B) BACKGROUND OF THE INVENTION
[0003] Modular power supplies are used since many years in various domestic as well as commercial applications. The modular power supplies used in telecommunication systems are often rack mounted in which a plurality of independent power supply modules are placed in a common rack. The rack size is typically 19 inches wide. Each module in the rack is typically supplied with an on board power supply drawing power from a common AC mains or Solar Panels Termination boards. The on board power supply of each unit thus functions to convert AC power to DC power or DC power to DC power respectively.
[0004] However, the applications which utilize only a small amount of power still need to install the complete set of power supply rack as these racks are not scalable. This turns out to be a costly affair as the complete power supply rack has to be purchased even when the power supply demand is much lesser for the application.
[0005] Further, certain modules in the rack experience early failure as compared to other modules when in use. The repair or replacement of the failed power supply module requires shutdown of the whole power supply rack. In some mission critical systems (such as telecommunications industry, hospitals, and banking) even a temporary system shutdown is highly undesirable. In addition, many applications such as telecommunication transmitters/towers require scalable power supply racks capable of supplying power depending on usage.
[0006] Hence, there is a need for a scalable modular power supply rack configured for accepting hot pluggable power supply modules. There is also a need for a power supply rack offering on site capacity enhancement using power supply modules. Further, there is a need for a power supply rack with a standardized design resulting in ease of productivity.
[0007] The above-mentioned shortcomings, disadvantages and problems are addressed herein and which will be understood by reading and studying the following specification.

C) OBJECT OF THE INVENTION
[0008] The primary object of the present invention is to provide a scalable modular integrated multi-source power supply rack configured for accepting hot pluggable power supply modules.
[0009] Another object of the present invention is to provide a power supply rack offering on site capacity enhancement from 9/12kW to 27/36kW with additional 2kW to 6(8.1) kW Solar MPPT Chargers using plurality of power supply modules each of 9/12kW and Solar Charger module of 2kW(2.7kW) each respectively.
[0010] Yet another object of the present invention is to provide a power supply rack with a standardized design resulting in ease of productivity and easy assembly.
[0011] Yet another object of the present invention is to provide a power supply rack that facilitates hot swapping of individual power supply modules without shut down of the whole system.
[0012] Yet another object of the present invention is to provide globally used standardized power supply rack having 19 inch width.
[0013] Yet another object of the present invention is to provide a power supply rack with adjustable mounting rails and numbered guides for adjusting depth of different installations.
[0014] 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.
[0015] Yet another object of the invention to install different technology batteries at same time to the power system for storage energy backups.
[0016] Yet another object of the invention is to use the selected modules of the power system in indoor as well for outdoor conditions.

D) SUMMARY OF THE INVENTION
[0017] The various embodiments of the present invention provide a scalable modular power supply rack configured for accepting hot deployment of pluggable power supply modules. The power supply rack comprises an AC DC distribution module, Solar input termination modules, one or more SMR power modules, one or more solar Maximum Power Point Tracking (MPPT) chargers, one or multilevel control module, an automation module, a Li-Ion/VRLA Battery Switching Unit, one or more interconnection bus-bars and a plurality of adjustable mounting rails. Each power module with DC load distribution is of 9KW capacity and additional hybrid module consisting of 6/8kW Rectifier & 6/8.1kW Solar capacity without any load distributions. Thus, the power supply rack offers on site capacity enhancement from 9/12 kW to 27/36kW using individual power modules.
[0018] According to one embodiment of the present invention, the power supply rack uses a standardized 19 inch design which results in ease of productivity and easy assembly. The mounting rails and numbered guides of the power supply rack are adjustable to accommodate depth of different installations.
[0019] According to one embodiment of the present invention, each SMR power module comprises a pluggable power module consisting of a switched mode rectifier, an AC input section for delivering power from Alternating Current to Direct Current (AC DC) distribution module to the individual Switched Mode Rectifier (SMRs), and similarly each Solar MPPT Charger comprises a pluggable power module consisting of a DC-DC converter and a DC input section for delivering solar panel; a DC section for distribution of output DC supply from SMRs to an individual load operator and a control section for sensing various required parameters and controlling of the module. The distribution section provided in the DC section comprises MCBs provisioned for two separate load operators along with DC contactor for connection/disconnection of load from the system. The DC distribution function is performed by pluggable bus bars which act as an interconnection arrangement between the module and the system.
[0020] According to one embodiment of the present invention, the control section comprises single panel mount connectors which terminate on the back panel of the module. The plugging of the connector to the control module results in the interconnection of all control signals from control module to the power module and other all modules to the controller module. The control module is designed to accommodate controlling of about 120 SMR power modules which includes about 20 Solar MPPT Chargers, automation module, FAN cooling unit, Li-Ion VRLA Battery Unit, DGBC. All the control signals are terminated on the connectors mounted on back panel. The interconnection of control cable from SMR power module/distribution module results in the transfer of control signals to the modules.
[0021] According to one embodiment of the present invention, the automation module comprises an Automatic Mains Failure (AMF) panel and a DG battery charger section; DG Battery charger section is physically a separate part of Automation Module but works in conjunction with the Automation Module. All the control signals from DG battery sections and AMF panel are terminated on a number of connectors on backplane of the unit and user connections are terminated on the front size of the unit. These mating parts for the connectors are easily plugged or unplugged from the system resulting in modularity of system in terms of installation.
[0022] According to the one embodiment of the present invention, the Li-Ion/VRLA (Valve-regulated lead-acid battery) Battery module comprises of Li/-ion/VRLA fall back arrangement. This module comprises with the termination of control signals, li-ion battery termination, VRLA battery termination & Termination of common DC negative bus. The same unit can also be utilized for different technology batteries as well apart from VRLA and Li-Ion battery.
[0023] According to the one embodiment of the present invention, the FAN cooling unit comprises of FANs to transfer the heat load generated by the rectifiers & solar MPPT charges to the environment. The FAN cooling unit shall be utilized precisely in outdoor systems or in special cases of indoor systems. The FANs can be programmed to run on constant speed or variable speed.
[0024] According to the one embodiment of the present invention, different necessary accessories can also be used with these standard modules. The different necessary accessories can be Smoke sensors, door sensors, Servicing Lamps, positive busbars for all common terminations, NMS (Network Management System) Modem cards.
[0025] These and other aspects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating the preferred embodiments and numerous specific details thereof, are given by way of an illustration and not of a limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.

E) BRIEF DESCRIPTION OF THE DRAWINGS
[0026] 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:
[0027] FIG. 1 illustrates a block diagram of a power supply rack, according to an embodiment of the present invention.
[0028] FIG. 2 illustrates a schematic diagram depicting a front, side, rear and top view respectively of the power supply rack, according to an embodiment of the present invention.
[0029] FIG. 3 illustrates a schematic diagram depicting interconnection bus bars used in the power supply rack, according to an embodiment of the present invention.
[0030] FIG. 4 illustrates a hot pluggable joint of the power supply rack, according to an embodiment of the present invention.
[0031] FIG. 5 illustrates a top, isometric, front and side view respectively of the automation module used in the power supply rack, according to an embodiment of the present invention.
[0032] FIG. 6 illustrates a top view of the automation module used in the power supply rack with open cover, according to an embodiment of the present invention.
[0033] FIG. 7A illustrates a top, isometric, front and side view respectively of the SMR power module-1 used in the power supply rack, according to one embodiment of the present invention.
[0034] FIG. 7B illustrates a top, isometric, front and side view respectively of power Module 2, the SMR power module & Solar MPPT Chargers used in the power supply rack, according to another embodiment of the present invention.
[0035] FIG. 8 illustrates a top view of the SMR power module used in the power supply rack with open cover, according to an embodiment of the present invention.

[0036] FIG. 9 illustrates a top, isometric, front and side view respectively of the control module used in the power supply rack, according to an embodiment of the present invention.
[0037] FIG. 10 illustrates a top view of the control module used in the power supply rack with open cover, according to an embodiment of the present invention.
[0038] FIG. 11 illustrates a top / front open view of the DGBC DG battery charger, according to an embodiment of the present invention.
[0039] FIG. 12 illustrates a top / front open view of the FAN Cooling Unit, according to an embodiment of the present invention.
[0040] FIG. 13 illustrates a top/front open view of Li-Ion VRLA Switching Unit, according to an embodiment of the present invention.
[0041] 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
[0042] 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 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.
[0043] The various embodiments of the present invention provide a scalable modular power supply rack configured for accepting hot pluggable power supply modules. The power supply rack comprises an AC DC & Solar distribution module, one or more SMR power modules, one or more Solar MPPT Chargers, a control module, an automation module, a DG Battery Charger, one Li-Ion/VRLA Switching Unit, one cooling unit, one or more interconnection bus-bars and a plurality of adjustable mounting rails. Each power module is of 9kW/12kW capacity. Thus, the power supply rack offers on site capacity enhancement from 9kW/12kW to 27/36kW using plurality of power supply modules and Solar MPPT Chargers.
[0044] According to one embodiment of the present invention, the power supply rack uses a standardized 19 inch design which results in ease of productivity and easy assembly. The mounting rails and numbered guides of the power supply rack are adjustable to accommodate depth of different installations.
[0045] According to one embodiment of the present invention, each SMR power module comprises a hot deployable pluggable power module consisting of a switched mode rectifier and Solar MPPT Chargers, an AC input section for delivering power from AC-DC distribution module to the individual SMRs, Solar input termination, one or more Solar MPPT Chargers, a DC section for distribution of output DC supply from SMRs to an individual load operator and a control section for sensing various required parameters and controlling of the module. The distribution section provided in the DC section comprises MCBs provisioned for two separate load operators along with DC contactor for connection/disconnection of load from the system. The DC distribution function is performed by pluggable bus bars which act as an interconnection arrangement between the module and the system.
[0046] According to one embodiment of the present invention, the control section comprises panel mount connectors which terminates on the back panel of the module. The plugging of the connector to the control module results in the interconnection of all control signals from control module to the other modules. The control module is designed to accommodate controlling of SMR power modules or Solar Modules, AC-DC distribution and automation module, DGBC, Li-Ion/VRLA Switching Unit, FAN cooling unit. All the control signals are terminated on the connectors mounted on back panel. The interconnection of control cable from different modules results in the transfer of control signals to the modules.
[0047] According to one embodiment of the present invention, the automation module comprises an automatic mains failure (AMF) panel and a DG battery charger section; physically the DG battery Charger is not the part of Automation Module but it comes in conjunction with Automation Module. All the control signals from DG battery sections and AMF panel are terminated on a number of connectors on backplane of the unit and user signals on the front side of the Automation unit. These mating parts for the connectors are easily plugged or unplugged from the system resulting in modularity of system in terms of installation.
[0048] FIG. 1 illustrates a block diagram of a power supply rack, according to an embodiment of the present invention. With respect to FIG. 1, the power supply rack comprises the Automation Module, one or more SMR power modules 104, one or more Solar MPPT Chargers, the control module 106 , Li-Ion/VRLA Switching unit, Fan Cooling Unit, and 108 interconnected using one or more interconnection bus-bars (not shown) and mounted on a plurality of adjustable mounting rails (not shown).
[0049] FIG. 2 illustrates a schematic diagram depicting a front (202), side (204), rear (206) and top (208) view respectively of the power supply rack, according to an embodiment of the present invention. With respect to FIG. 2, the power supply rack offers flexibility to the user/customer to customize the requirement in terms of expandability. The power supply rack is hot deployable and pluggable at both rectifier level and system level. All the modules from the rack are front accessible. The power supply rack significantly reduces cabling and installation costs as no extra wiring is needed. Thus, the system is highly efficient and energy-saving and the power components used are eco-friendly. The modules are independent of each other and hence easy to assemble on site. The power supply rack is adaptable to both single phase and three phase supply; can be configured through Automation Unit.
[0050] According to one embodiment of the present invention, the system is also configurable to operate in ECO mode that enables significant energy savings even at low load operational conditions. For achieving structural durability and corrosion resistance, seven stage treatments is done on the sheet prior to powder coating. Stainless steel fasteners are used in the rack for optimal and corrosion free joints. All the modules are configured to be similar in depth.
[0051] According to one embodiment of the present invention, for providing DC interconnection VRLA/Li-Ion Switching Unit and SMR power module pluggable bus-bars are used. Further, cables with pluggable connectors are used for AC interconnection. For interconnection between AC DC distribution module and control module, control cable with pluggable connectors is used. Control cable with pluggable connectors is also used for interconnection between SMR power module and control module. Similarly, between automation module and Power Modules, AC interconnection cable is used. For interconnection between automation module and control module control cables with pluggable connectors at both ends are used. FIG. 3 illustrates a schematic diagram depicting interconnection bus bars used in the power supply rack, according to an embodiment of the present invention. With respect to FIG. 3, the interconnection bus-bars 302 are shown. FIG. 4 illustrates a hot pluggable joint of the power supply rack, according to an embodiment of the present invention. With respect to FIG. 4, the bus-bar (402) used for interconnection is shown.
[0052] FIG. 5 illustrates a top (502), isometric (504), front (506) and side (508) view of Automation module used in the power supply rack, according to an embodiment of the present invention. The automation module comprises of EB & DG Terminations, Surge Protection Devices, Contactors/SCR for Phase Selection, SMRs individual MCBs, and AC & DC Spare MCBs which can be configurable to different applications.
[0053] According to one embodiment of the present invention, the distribution section provides a provision for powering three power modules. The distribution section comprises AC distribution connectors with pluggable connector at back 610. The input cable of the power module is plugged on the connectors resulting in AC power distribution to individual SMRs. This also provides provision for adapting three phase or single phase system and is capable of powering individual power module. The distribution section also comprises DC contactors 612 for holding the function of disconnecting battery from SMR power modules in case battery voltage falls below a particular value and for protecting battery against deep discharge. The distribution section further comprises DC shunts 614 for sensing battery current. The Power Module further comprises of Solar MPPT Chargers and their input terminations.
[0054] According to one embodiment of the present invention, the distribution section still further comprises DC power distribution section 616 that comprises two pluggable bus bars to provide a feature of plugging the distribution module to the system level DC bus bars. Plugging into the system results in DC power distribution to individually connected power modules. The control section comprises a single panel mount connector which terminates on the back panel of the module. The plugging of the connector to the control module results in the interconnection of all control signals from control module to the power module. The control signals include drives for battery contactors, battery current sensing, battery voltage sensing and load voltage sensing.
[0055] According to one embodiment of the present invention, the key features of the automation module & power module include front and easy access for customer wiring with slope provided on the front wall, lightweight and compact design, ease of transportation, bus-bars made from Cu-ETP (as per IS 191:2007) for optimal performance of the system, all the components used are CE certified or of reputed make, ergonomically designed, optimum number of hardware used, connectors used are easily pluggable, ease of connection with all other modules without interrupting the functionality of the system and use of bus-bars maximized resulting in increased overall reliability of the system.
[0056] Fig illustrates the Li-Ion VRLA Switching unit. It comprises of terminations of Li-Ion & VRLA batteries and Fall back arrangement of Li-Ion VRLA Battery. Two any different battery technologies can be utilized in the Li-Ion VRLA Switching Unit.
[0057] FIG. 7 illustrates a top (702), isometric (704), front (706) and side (708) view respectively of the SMR power module used in the power supply rack, according to an embodiment of the present invention. FIG. 8 illustrates a top view of the SMR power module used in the power supply rack with open cover, according to an embodiment of the present invention. With respect to FIG. 8, SMR power module is referred to as the heart of the power system. The SMR power module comprises a hot pluggable module consisting of one or more switched mode rectifiers, AC input section for delivering power from AC-DC distribution module to the individual SMRs, a DC section for distribution of output DC supply from SMRs to the individual load operator and a control section for sensing various required parameters and controlling of the module. The AC section comprises AC with pluggable female connector 802 at back. This performs the function of supplying AC power to the module. The AC section also comprises SMR input MCBs 804 connected to AC input connectors. This supplies power to individual SMRs backplane PCB /CONNECTORSs and acts as a switch for powering ON/OFF individual SMRs. AC PCB/CONNECTORS with pluggable female connector also switches off the SMRs during abnormal condition such as in over load condition as well as faulty condition.
[0058] According to one embodiment of the present invention, the DC section comprises MCBs 806 provisioned for two separate load operators along with DC contactor for connection/disconnection of load from the system. The DC distribution function is performed by hot pluggable bus-bars which act as an interconnection arrangement between module and system. The DC section also comprises DC contactors 808 which hold the function of disconnecting the load from the system in case the battery voltage falls below a particular value and is driven by the control unit. The DC section further comprises DC shunts 810 for sensing load current. The DC section still further comprises hot pluggable bus bars 812. This provides DC interconnection between SMR power modules and distribution module.
[0059] According to one embodiment of the present invention, the SMR section comprises switched mode rectifiers (3 x 3Kw/4kW) 814 which converts power from an AC source to DC and is hot pluggable to back plane PCB/CONNECTORS/. The SMR section also comprises SMR back plane PCB/CONNECTORS/ 816 connected to SMRs input MCBs. This supply input 1 phase AC power from AC distribution module to the connected power module and connects output DC from SMRs to load. The switched mode rectifiers comprise a pluggable connector for SMR communication to the control unit.
[0060] According to one embodiment of the present invention, the control section comprises a single panel mount connector which terminates on the back panel of the module. The plugging of the connector to the control module results in the interconnection of all control signals from control module to the module. The control signals include drives for load contactors, load current sensing, MCB trip in case of over currents and communication cable for SMRs to be connected to the main control section.
[0061] The key features of the SMR power module include front and easy access for wiring with slope provided on the front panel(MCB Panel), lightweight and compact design, high value of power density, better adaptation to future requirement, bus-bars made from Cu-ETP (as per IS 191:2007) for optimal performance of the system, all the components used are CE certified or of reputed make, ergonomically designed, diode integrated to avoid reverse polarity, minimal hardware’s used, connectors used are easily pluggable, ease of connection with all other modules without interrupting the functionality of the system, use of bus-bars maximized resulting in increased overall reliability of the system and hot plugging at both rectifier level and system level.
[0062] FIG. 9 illustrates a top (902), isometric (904), front (906) and side (908) view respectively of the control module used in the power supply rack, according to an embodiment of the present invention. FIG. 10 illustrates a top view of the control module used in the power supply rack with open cover, according to an embodiment of the present invention. With respect to FIG. 10, control module is designed to accommodate all the controlling of power system. The control module is designed to accommodate controlling of 3 SMR power modules, automation module. All the control signals are terminated on the connectors mounted on back panel. The interconnection of control cable from SMR power module/distribution module results in the transfer of control signals to the modules.
[0063] According to one embodiment of the present invention, the control module comprises a monitoring and control module (MCM) 1002. The MCM module performs accurate monitoring of system parameters. The controller provides local indications for alarms and all measurements. Settings and calibrations are done locally through display on the front panel or over serial port locally as well as remotely. The control module also comprises a DC interface card 1004. The functions of the DC interface card comprise reading DC voltage and battery voltage, reading load current and battery current, reading battery temperature and room temperature, giving command for low voltage disconnects on the basis of command from controller and sending commands for external OP PFC.
[0064] According to one embodiment of the present invention, the control module further comprises PFC I/O card 1006. The functions of the PFC I/O card include providing drive to load and battery contactors after command from DCIF card, capable of sensing 16 PFC inputs, capable of providing 16 outputs PFC for alarm extension after command from DCIF card and providing termination point for temperature sensing cables. The control module still further comprises communication interface card 1008 which acts as a medium of communication between different control cards including MCM. The control module still further comprises a NMS 1010 which provides GSM / GPRS interface for remote monitoring functions. The NMS regularly polls the MCM for alarm status changes or parameter updates. In case of a change in alarm status, the NMS sends data to configured trap receiver.
[0065] The key features of the control module include LCD colored display with a state-of-the-art interface allows simple and convenient local set-up, control and remote monitoring, remote access/monitoring through web browsers, TCP/IP and SNMP as standard, better adaptation to future requirements, ergonomically designed, optimum number of hardware used, connectors used are easily pluggable and ease of connection with all other modules without interrupting the functionality of the system.
[0066] FIG. 11 illustrate a top (1102), isometric (1104), front (1106) and side (1108) view respectively of the automation module used in the power supply rack, according to an embodiment of the present invention. FIG. 12 illustrates a top view of the automation module used in the power supply rack with open cover, according to an embodiment of the present invention. The automation module comprises an AMF panel. The AMF panel comprises input MCBs 1202 for providing user connection for AC mains and DG input. The AMF panel also comprises AC contactors 1204 that perform function of switching between AC mains and DG input. The AMF panel further comprises ACIF card 1206. The ACIF card reads AC input voltage and AC input current for mains and DG, controls the contactor logic/SCR Logic depending upon system configuration and calculates DG energy and EB energy. FIG. 13A and 13B illustrate a top (1302) and front sectional (1304) view respectively of the automation module used in power supply rack, according to an embodiment of the present invention. The AMF panel still further comprises contactor relay driver card 1208 which provides extension for ACIF card and provides drives relays of to LCU contactors. The AMF panel still further comprises a back panel connectors 1210 that acts as AC interconnection between automation module with AC-DC distribution module and light conditioning unit.
[0067] The automation module comprises a DG battery charger section 1306 for DG battery charging and DG control (start/stop), DG protection and alarms 1308. All the control signals from DG battery sections and AMF panel are terminated on a number of connectors on backplane of the unit. The mating parts for the connectors are easily plugged or unplugged from the system resulting in modularity of system in terms of installation.
[0068] The key features of the automation module include front and easy access for customer wiring as a certain amount of slope is provided on the front wall, easily be pulled out using handles, optimum number of hardware used, connectors used are easily pluggable, ease of connection with all other modules without interrupting the functionality of the system, capable of integrating diesel generator power supply, grid power supply and line conditioning unit, 12V 120W DG battery charger with reverse battery connection protection, interfacing port for RS485 based fuel sensor, DG start/stop functions with auto/manual mode and DG control signal terminations for low fuel 1, low fuel 2, HCT, DG door open, V-Belt fail, emergency stop, LLOP sense.
[0069] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments.
[0070] It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modifications.

G) ADVANTAGES OF THE INVENTION
[0071] The various embodiments of the present invention provide a scalable modular power supply rack configured for accepting hot pluggable power supply modules. The capacity enhancement of the system is done on site as the design is expandable from 9kW/12kW to 27/36kW (in multiples of 9/12kW KW) using power modules. Each individual power module is quickly inserted (Hot pluggable) into or removed from the modular power supply system without shut down of the whole system. The power supply modules are standardized for 19 inch (Globally used width) racks. The power supply rack has a modular design for quick and easy assembly. Adjustable mounting rails with numbered guides help to adjust depth for different installation needs.
[0072] Further, the scalable modular power supply rack of the present invention provides better adaptation to future requirements. The rack is ergonomically designed with minimal hardware used, connectors used are easily pluggable and offers ease of connection between all the modules without interrupting the functionality of the system. The power supply rack also offers ease of transportation due to simple assembly and disassembly required. The power supply rack is used for several applications such as DC power applications, telecom sector, IT sector, PSUs and in domestic applications.
[0073] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such as specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments.
[0074] It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modifications. However, all such modifications are deemed to be within the scope of the claims.
[0075] Although the embodiments herein are described with various specific embodiments, it will be obvious for a person skilled in the art to practice the embodiments herein with modifications.

CLAIMS:
1. A scalable modular power supply rack configured for providing on site capacity enhancement, the scalable modular power supply rack comprising:
an Alternating Current to Direct Current (AC-DC) distribution module coupled to a main power supply, the AC-DC distribution module configured for converting the AC power to DC power;
one or more Switched Mode Rectifier (SMR) power modules coupled to an automation module, each SMR power module configured for supplying power, the power module coupled to the Li-Ion VRLA Switching Unit; and
a control module, configured for controlling functioning of the multiple power modules, distribution module and automation module.

2. The scalable modular power supply rack according to claim 1, comprising one or more interconnection bus-bars and a plurality of adjustable mounting rails.

3. The scalable modular power supply rack according to claim 1, further comprising a plurality of mounting rails and numbered guides configured to be adjustable to accommodate depth of different installations.

4. The scalable modular power supply rack according to claim 1, wherein each power module is of approximately 9KW/12kW capacity.

5. The scalable modular power supply rack according to claim 1, wherein each SMR power module comprises:
a pluggable power module that includes a switched mode rectifier;
an AC input section configured for delivering power from the Automation module to each power module;
a DC section for distribution of output DC supply from each power module to an individual load operator; and
a control section configured for sensing one or more predetermined parameters and controlling the SMR power module thereof.

6. The scalable modular power supply rack according to claim 5, wherein the DC section comprises one or more Miniature Circuit Breakers (MCB), each MCB coupled to a load operator, and a DC contactor configured for facilitating selective connection of the load operator to the SMR power module.

7. The scalable modular power supply rack according to claim 6, wherein the DC section further comprises a plurality of pluggable bus bars configured for performing the DC distribution function by providing an interconnection arrangement between the SMR power module and the distribution module.

8. The scalable modular power supply rack according to claim 1, wherein the automation module comprises an Automatic Mains Failure (AMF) panel that includes multiple input MCBs configured for connecting the load to the main power supply, and a DG battery charger section, the DG battery charger section configured for charging a DG battery; physically the DG battery charger is not the part of Automation module but is being used in conjunction with automation module.

9. The scalable modular power supply rack according to claim 5, further comprising a surge protection device connected in parallel to the main power supply.

10. The scalable modular power supply rack according to claim 1, wherein the automation module coupled to the AC-DC distribution module is configured for storing backup power.