AU2020102346A4 - Continuous energy supply to house hold appliances through uninterrupted power meter - Google Patents

Continuous energy supply to house hold appliances through uninterrupted power meter Download PDF

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Publication number
AU2020102346A4
AU2020102346A4 AU2020102346A AU2020102346A AU2020102346A4 AU 2020102346 A4 AU2020102346 A4 AU 2020102346A4 AU 2020102346 A AU2020102346 A AU 2020102346A AU 2020102346 A AU2020102346 A AU 2020102346A AU 2020102346 A4 AU2020102346 A4 AU 2020102346A4
Authority
AU
Australia
Prior art keywords
electrical
force
association
power supply
mains
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
AU2020102346A
Inventor
Swaminathan C.
Sriharan G.
Nalini Joseph L.
Karthigairajan M.
Suchithra M.
Murugan P.
Surianarayanan P.
Arun S.
Kaliappan S.
Senthilrajan S.
Balaji V.
Suresh Kumar k.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
P Murugan Dr
C Swaminathan Dr
K Suresh Kumar Dr
L Nalini Joseph Dr
M Suchithra Dr
S Arun Dr
Original Assignee
P Murugan Dr
C Swaminathan Dr
K Suresh Kumar Dr
L Nalini Joseph Dr
M Suchithra Dr
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by P Murugan Dr, C Swaminathan Dr, K Suresh Kumar Dr, L Nalini Joseph Dr, M Suchithra Dr filed Critical P Murugan Dr
Priority to AU2020102346A priority Critical patent/AU2020102346A4/en
Application granted granted Critical
Publication of AU2020102346A4 publication Critical patent/AU2020102346A4/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/242—Home appliances
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/248—UPS systems or standby or emergency generators

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

With the prior and different articles in see there is given, as per the development, a uninterruptible force appropriation framework for household and structures, said framework containing a first electrical power supply association with be given from the electrical board through a mains power supply; a second electrical power supply association with be given to the majority of electrical appliances from the mains power flexibly; a third electrical force flexibly association with a steady force level to be given to a pre-decided number of electrical apparatuses from the said mains power gracefully; a first pool of electrical machines in the said household and structures; a second pool of electrical machines ordered for crisis administrations got from the said first pool of machines; at any rate one exchanging gadget for specifically exchanging the association of the electrical burden joined in the said first, second and third electrical force flexibly association and in any event one miniature regulator and additionally processor for distinguishing the method of electrical supply from the mains and speaking with the said at any rate one switching device. a Fa artVie Tn Dsge Vrart [Feug rmy Tepl te S.ytem Help / wg I I< +~blr Xk8 P2 X X P[c V7 A~ StCA~ /+ S FL(ENO L Mr1]L C it I :IX P II Itlwee Vwl`t -2ll lAi i OFig.3

Description

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/ wg I Xk8 I<+~blr P2
X X
P[c V7
A~StCA~
/+ S FL(ENO LMr1]L C it I :IX P II Itlwee Vwl`t -2ll lAi i
OFig.3
Editorial Note 2020102346 There is only seven pages of the description
COMPLETE SPECIFICATION
Continuous Energy Supply to House Hold Appliances through Uninterrupted Power Meter
Field of the Invention
This invention relates to energy management, and more particularly to continuous back up power supply to household consumer appliances, just as other pre-chosen vitality selected energy consuming devices and/or systems found home. The current exposure discovers specific application and controls activity of buyer machines, just as other vitality devouring gadgets or potentially frameworks, and goes about as a door between a service organization and the shopper apparatuses, just as other vitality expending gadgets and additionally frameworks during power shut down. The controller/gateway device to be discussed below is at times called herein as Uninterrupted Power Meter (UPM).
Background and prior art of the Invention
Electricity Power is an indispensable energy of vitality that makes the establishment of current life. The expanding prerequisite for electric force because of consistent development of populace and expanding private and mechanical needs make power both an alluring and costly essential item.
Some of the other power systems serve as a back-up power supply for the household when the household's primary power source is not functional. Most back-up power supply systems are stand-alone systems which operate independently of the household's primary power source. Battery-powered generators are the most common back-up power supply systems. Battery-powered generators are generally activated automatically when a household loses power provided by the primary power system.
Different power distribution frameworks exist for family unit applications. Most household acquire power from a typical electrical force matrix as an essential force source. A portion of the other force frameworks fill in as a back-up power flexibly for the family when the family's essential force source isn't utilitarian. Generally back-up power flexibly frameworks are independent frameworks which work freely of the family unit's essential force source. Battery powered generators are the most widely recognized back-up power gracefully frameworks. Battery-powered generators are commonly initiated consequently when a family loses power gave by the essential force framework
In addition, some power systems are auxiliary systems to assist the household's primary power source. Some households obtain power from "renewable" sources to supplement power received from the household's primary power source. As an example, some households obtain power or energy from solar or geothermal sources in addition to using power from the common electrical power grid. Although these alternative sources may also be used as a back-up power supply, household which utilize these alternative power sources often draw power from these alternative sources on a continuous basis.
Although many power systems exist for serving various household power and energy needs, there stays a requirement for a retrofitting power system that can both serve continuous operating and back-up power needs for a household. Back-up generators normally require a flexibly of fuel for long-term activity. At the point when a network loses power, there is regularly a deficiency of fuel due to inoperability of fuel station pumps and expanded interest on restricted gas supplies. Likewise, power from "renewable" sources can be costly or in any case unreasonable to get for certain households.
Hence there is a need for a second system and method that supplies a constant voltage and energy to the house hold equipments during times of power shut down for meeting the basic requirements without the need for a storage system involving the battery packs and fuel based generators. Summary of the Invention
It is accordingly an object of the creation to give an electrical supply, which beats the previously mentioned burdens of the until now known devices and strategies for this overall kind and which is additionally improved as to the vitality the board during power shut down.
With the previous and different items in see there is given, as per the creation, a uninterruptible uninterruptible power distribution system for household and buildings, said framework containing a first electrical supply flexibly association with be given from the electrical board through a main; a electrical power supply connection to be provided to the plurality of electrical appliances from the mains power supply; a third electrical supply association with a consistent force level to be given to a pre-decided number of electrical apparatuses from the said mains power gracefully; a first pool of electrical machines in the said family and structures; a second pool of electrical machines classified for crisis administrations got from the said first pool of machines; in any event one exchanging devices for specifically exchanging the association of the electrical burden fused in the said first, second and third electrical force flexibly association and at any rate one miniature regulator and additionally processor for recognizing the method of electrical gracefully from the mains and speaking with the said at any rate one exchanging device.
Object of the Invention
In this invention to provide an uninterruptible electrical power supply to the household devices around the time. It is also an objective of the present invention to provide an Uninterruptible Power Mode (UPM) for the households and buildings during the power shut down durations of the EB. It is another objective of the present invention to provide a continuous supply of power to limited low wattage electrical appliances for unlimited time period.
It is one more goal of this invention give a uninterruptible power of 200W AC power through a devoted line to the pre-decided low wattage consumption family electrical apparatuses during the force shut down period from the electrical mains.
It is one another objective of the present invention to provide at least one switching device and at least one microcontroller at the first electrical power supply connection to be provided from the electrical board through a mains power supply.
It is each other target of this invention to give at any rate one exchanging device and at any rate one microcontroller at the principal electrical force gracefully association with be given from the electrical board through a mains power supply.
It is still an objective of the present invention to provideat least one switching device and at least one microcontroller at the second electrical power supply connection to be provided to the plurality of electrical appliances at the load end inside the building and household.
It is as yet a goal of this invention provide at least one switching device and at any rate one microcontroller at the second electrical supply association with be given to the majority of electrical appliances at the load end inside the building and household.
It is a desired objective of the present invention to provide an alarm and LED display for visual and audible indication of the switching of the power supply from the normal mode to the UPM mode through a dedicated third electrical power supply connection to be provided to the pre-determined low wattage consumption electrical appliances at the load end inside the building and household.
It is a final objective of the present invention to provide a zigbee network and processors /micro controllers for detecting the normal power supply from the mains and for communicating the power supply failure from the EB and for switching the power supply mode to the UPM mode through a dedicated third electrical power supply connection. Statement of the Invention
An uninterruptible power distribution system for household and buildings, said system comprising i) A first electrical power supply connection to be provided from the electrical board through a mains power supply; ii) A second electrical power supply connection to be provided to the plurality of electrical appliances from the mains power supply; iii) A third electrical power supply connection with a constant power level to be provided to a pre-determined number of electrical appliances from the said mains power supply; iv) A first pool of electrical appliances in the said household and buildings; v) A second pool of electrical appliances categorised for emergency services derived from the said first pool of appliances; vi) At least one switching device for selectively switching the connection of the electrical load incorporated in the said first, second and third electrical power supply connection and vii)At least one micro controller and/or processor for detecting the mode of electrical supply from the mains and communicating with the said at least one switching device.
Brief Description of the Drawings
Fig.1 illustrates the block diagram of the present invention at the EB section. Fig.2 illustrates the block diagram of the present invention at the load section. Fig.3 illustrates the schematic diagram of the present invention. Fig.4 illustrates the pictorial representation of the implementation of the present invention. Detailed description of the Drawings
This invention, a force distribution system for retrofitting to a hosehold or other building, is shown in fig. 4. The power distribution framework incorporates a third devoted electrical force gracefully line for providing vitality to the force dissemination framework for a vague timeframe. In the flow model, the force conveyance framework gets electrical force from electrical force source in the EBor the mains. Electrical force source might be the family's essential electrical force source. For example, the household appliances proprietor may utilize the principle power contribution to the family's essential electrical burden place as a contribution to the force dispersion framework.
The Uninterrupted Power Meter(UPM) advanced energy that acquires data from the end user's load devices and measures the vitality utilization of the shoppers and afterward gives added data to the service organization or potentially framework administrator. In this meter vitality used and the relating sum will be shown on the LCD consistently and imparted to the controlling base station. This technique utilizes no adjustment in focal force dissemination framework. In the home, before the electric meter a regulator is included. So on head of AC power, we can gracefully a second yield of intensity at 200W AC flexibly. This solitary gives us 200 watts [from the EB side], yet it is provided 24 hours per day. Restricted 200W flexibly which will be continuous; this won't be cut during the consume outs. There will be no power outages upon the usage of the present invention.The proposed power appropriation framework is especially appropriate for families geologically arranged in locales which regularly experience power outages and brownouts. The preceding description contains significant detail regarding the novel aspects of the present invention. It should not be construed, however, as limiting the scope of the invention but rather as providing illustrations of the preferred embodiments of the invention.The electrical power supply system has at least one first electrical load connection to which an electrical load can be connected; a first electrical power supply connection which can be connected to a general electrical power supply from the EB side; a second electrical power supply connection which is connected to an autonomous electrical power supply in the load side; a plurality of switching apparatus at the EB side and load side for switching the connection of the at least one electrical load connection from the first electrical power supply connection (mains operation) to the second electrical power supply connection (normal operation) or to the third electrical power supply connection (UPM) during the power shut down; and the autonomous electrical power supply (P). Furthermore, the electrical power supply system is wherein the at least one electrical load connection has at least one dedicated third electrical power supply connection, which is designed such that it identifies the brown out of the electrical power supply and switches the at least one electrical load connection on or off, as a function of preset criteria.
The electrical power framework as per the innovation permits the at any rate one electrical burden association with be turned here and there in a straightforward way dependent on standards which are preset in the at any rate one assessment and control device. This permits better vitality the executives to be accomplished for the pre-decided low wattage utilization electrical mechanical assembly, specifically the self-ruling electrical force flexibly, during earthy colored out since, for instance, over-burdening of the self-ruling electrical force gracefully can be stayed away from and moderately long haul island activity can be accomplished for especially Important associated electrical burdens
The uninterruptible power distribution system for household and buildings as illustrated in figs. 1-4 wherein the pre-determined number of electrical appliances include low-wattage loads and low load circuits and the said first microcontroller connected to the first electrical power supply connection periodically monitors the supply of power from the mains to the loads connected through the second electrical power supply and upon the detection of the power failure in the first electrical power supply connection by the said first micro controller, initiates the UPM mode by activating said alarm and indicates in the display and switches the electrical power supply connection from the second electrical power supply connection to the third electrical power supply connection. Further the above-described embodiments of the present invention are intended to be examples only. Alterations, modifications and variations may be effected to the particular embodiments by those of skill in the art without departing from the scope of the invention, which is defined solely by the claims appended hereto.
Editorial Note 2020102346 There is only two pages of the claim

Claims (5)

Claim
1. An uninterruptible force conveyance framework for family unit and structures, said framework involving
i) A first electrical supply association with be given from the electrical board through a mains power flexibly; ii) A second electrical supply association with be given to the majority of electrical machines from the mains power flexibly; iii) A third electrical supply association with a consistent force level to be given to a pre decided number of electrical machines from the said mains power flexibly; iv) A first pool of electrical machines in the said family and structures; v) A second pool of electrical apparatuses ordered for crisis administrations got from the said first pool of machines; vi) At least one exchanging gadget for specifically exchanging the association of the electrical burden consolidated in the said first, second and third electrical force gracefully association and vii) At least one miniature regulator or potentially processor for distinguishing the method of electrical gracefully from the mains and speaking with the said at any rate one exchanging gadget.
2. The uninterruptible power supply framework for family unit and structures as asserted in guarantee 1 wherein said framework further involves a caution and a LED show for visual and sound notice of the force shut down in the mains gracefully from the essential transformer.
3. The uninterruptible power distribution system for household and buildings as claimed in Claim 1 wherein the said first, second and third electrical power supply connections are AC line power source and the said first power supply connection is arranged to send electrical force from the force conveyance framework to the family line, the subsequent force gracefully association is designed to communicate the electrical force from the mains flexibly to the majority of electrical machines inside the said building.
4. The uninterruptible power distribution system for household and buildings as claimed in claim 1 wherein the said third force flexibly association is arranged to communicate a fixed 200W electrical force from the mains gracefully to the pre-decided number of electrical apparatuses inside the said working for boundless timeframe.
5. The uninterruptible power supply for family and structures as guaranteed in guarantee 4 wherein the pre-decided number of electrical machines incorporate low-wattage loads and low burden circuits
Fig.2 Fig.1
Fig. 3
Fig.4
AU2020102346A 2020-09-20 2020-09-20 Continuous energy supply to house hold appliances through uninterrupted power meter Ceased AU2020102346A4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2020102346A AU2020102346A4 (en) 2020-09-20 2020-09-20 Continuous energy supply to house hold appliances through uninterrupted power meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2020102346A AU2020102346A4 (en) 2020-09-20 2020-09-20 Continuous energy supply to house hold appliances through uninterrupted power meter

Publications (1)

Publication Number Publication Date
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