Electronic instruments are available in which six registers are provided, to record consumption at four different times of day and two levels of maximum demand. Implementation of a singlephase electronic watthour. Standard class, 1 and 2 alternatingcurrent watthour meters iec the wrong words are highlighted. Let ez meter help you accomplish your energy goals. The focus meter was designed to be a lowcost, solidstate, kwhonly meter as an alternative metering and amr platform to the induction meter. The basic unit of power is watts and it is measured by using a watt meter. For a nushmounted meter, the meter base may include the sides of the case. The centron meter brings you the first true breakthrough in measurement for the residential market in over a century. Eatons line of single position, selfcontained meter sockets house the utilities electrical watt hour meters in residential and commercial buildings. Tamperresistant 6digit dc hour meter has solid state circuitry designed for a long service life. Implementation of a threephase electronic watthour meter using. With this solidstate meter, itron presents a platform for residential metering with the flexibility to adapt as your needs expand and change. Watthour meter is in fact a measuring device which can evaluate and records the electrical power passing through a circuit in a certain time.
The difference between watthour meter and varhour meter. Several manufacturers make such meters, including popular brands such as the kill a watt meter from p3 international, the watt s up meter from electronic educational devices, and the digital power meter from brand electronics. This device is made up from power, current and voltage transformers, who measure the average power. The rogowski coil current sense library implements an efficient software integration of the rogowski output, enabling this to be a single chip solution for 3phase emetering. Watthour meter test free download as powerpoint presentation. Crompton instruments kilowatt hour energy meters energy division 4297 tyco kilowatt 08 26308 10. Scribd is the worlds largest social reading and publishing site. Sockets work with a circuit breaker distribution section in a rainproof enclosure for residential installations, rural service entrance, mobile homes and for temporary power on construction sites. Watthour meter publisher san francisco, technical pub. Threephase watt hour meter current transformer ct mh 96h mh 96 3. Voltage from mains is directly fed to a rcbased circuit followed by rectification. Wattnode meters are suitable for use in commercial, industrial. In addition, the dynamic range performance of the meter has been extended to 400. Specification of ac static watt hour meters class 1.
Powerful, automated meter test socket the phazer family of watthour meter test sets are true threephase, fully automatic systems capable of testing virtually all types of ansi socket mounted and bottomconnected single and threephase three and four wire electricity meters. It was oliver shallenberger at westinghouse who developed the first practical modern watt hour meter, basing his invention off of weston and thomsons moving coil galvanometer instruments. Contents a3 alpha meter technical manual viii tm422190b 2003. Dt862 threephase watthour meter wiring diagram outer and mount dimension structure feature specification and main technical data the product consists of threegroup electromagnetic components, dual round plate, damp electromagnetic steel, aluminum alloy bracket, metering unit of five or sixposition, wiring box and enclosure. Technical specifications for single phase electronic energy meter of. Using the 6100a electrical power standard to calibrate energy. Throughout the years falco has developed all the necessary processes to manufacture the parts. Watthour meter monitor have you ever wondered how much power your house or apartment is using. Ls industrial systems watt hour meter can store forever, because. Watt hour meter, 200 amp, 120240 volt ac, 1phase, 4 lug.
Cts for watthour meters falco specializes in developing current transformers for electricity meters according to specific needs in terms of accuracy, mechanical constraints. Light commercial kilowatt hour meter, 3phase, 120277 volt autoranging power supply suitable for both 277480v, 4w, wye and 240480v 4wire delta services, 7 jaw. It keeps the main features of bl0931, such as better linearity. Handbook on electricity meters asiapacific economic cooperation. Power quality metering is typically used by utilities to monitor their grid and by large industrial companies looking to ensure the power being supplied to their big machinery is clean, in. Model wm watthour meter installation, operation and. One watt second ws equals 1 joule ja kilowatt hour kwh therefore equals 3. Watthour meter article about watthour meter by the free. Pdf an electronic watthour meter in hybrid thick and thin film technology is described. Running a 5,000 watt electric clothes dryer for one hour consumes 5 kilowatt hours of electricity. Use of the equipment in a manner not specified by the manufacturer can impair the protection provided within. Shallenberger at westinghouse figured out how to build the worlds first accurate watt hour meter. Dd862 singlephase watt hour meter outer and mount dimension dd862 wiring diagram specification and main technical data dd862d glass cover five digital the electromagnetic component is horizontal.
Pocket guide to watthour meters alexander publications. Implementation of a singlephase electronic watthour meter using msp430afe2xx rev. It keeps the main features of bl0931, such as better linearity, wide range of dynamic measurement, against potential shift, as well as. Gst matelec kw hour meter 3 phase 100amp direct online class 1 lcd display fkw15120. While in this mode, a product will not draw any electricity and will usually measu re 0 watt w he n metered. Pocket guide to watthour meters helps you install meters quickly and safely and it delivers loads of practical metering information with useful formulas, tables, diagrams, and examples. The meter provides advanced fourquadrant revenue functions, transformer and line loss compensation, and increased data profiling without adding hardware option boards. Implementation of a singlephaseelectronic watt hour meter using the msp430f6736 bart basile, stefan schauer, kripasagar venkat abstract this application report describes the implementation of a single phase electronic electricity meter using the texas instruments msp430f673x metering processor. Some meters measured only the length of time for which charge flowed, with no measurement of the magnitude of voltage or current. The phazer family of watthour meter test sets are true threephase, fully automatic systems capable of testing virtually all types of ansi socket mounted and bottomconnected single and threephase three and four wire electricity meters. Todays choice, tomorrows power while the electromechanical meters you. Implementation of a singlephase electronic watthour meter.
Software package also includes a dummy application for quick and easy evaluation of the hardware and software. Build a digital watt and watthour meter internet archive. The kilowatt hour meter is one of the latest additions to the. Meter socket, 200 amp, 1phase, 4 jaw, 600 volt ac, ringtype, without bypass, ug. Taking into account the requirements of the meter, two. Issue to resolve white paper l 09 a high accuracy standard for electricity meters stability of components would need to be understood. Implementation of a singlephase electronic watt hour meter using the msp430f6736a if a test setup needs to be connected, the connections have to be made according to the evm design. A9mem2110 modular single phase power meter iem2110. The meter is based on reliable, field proven digital multiplication measurement technique.
Although there are several different types of watt hour meters, each consists essentially of a small electric motor and a counter. Dt862 threephase watt hour meter wiring diagram outer and mount dimension structure feature specification and main technical data the product consists of threegroup electromagnetic components, dual round plate, damp electromagnetic steel, aluminum alloy bracket, metering unit of five or sixposition, wiring box and enclosure. Jul 25, 2018 watthour meter is in fact a measuring device which can evaluate and records the electrical power passing through a circuit in a certain time. Watthour meter bases falco is a leader in the production of bases for electricity meters. Whatever the criteria, the calibration system must have the ability to have. By implementing the watthour meter, we can know how much amount of electrical energy is used by a consumer or a residence or an electrically powered. However, because most circuit breakers in homes are 15 amps, i made my unit to have a range of zero to 1500 watts.
The meter platform will measure energy accurately over varying environmental conditions. The difference between watt hour meter and var hour meter i understand, that the question is asking for the design and operation principle of the ferraris energy meter. The standard unit of measure used to determine the amount of electricity a customer uses. English the ade7757 board design greatly exceeds this basic specifi cation for many of the accuracy requirements, e. The amount of power the meter can request is limited to the values imposed by regular standards 2 3, in the case of the meter developed the maximum power consumption from the grid is 2 w per phase. Buy one of these meters today, and you can begin to. Facilities instructions, standards, and techniques volume 310. Modern electricity meter safety, accuracy and performance.
The description can be hopefully found in profound electrical engineering textbooks, unfortunately i dont have a reference at hand. Watt hour meter, device that measures and records over time the electric power flowing through a circuit. Watthour meter maintenance and testing, january 1992. The cpu of watt hour meter is same as humans brain. At present ez meter is developing a solution for this market to provide harmonics and other power quality information. Implementation of a singlephase electronic watthour meter using. Estimated electric bills our meter readers attempt to read your meter every month or every other month bimonthly depending on your. The a3 alpha meter is a very accurate revenue meter 0. Running a 5,000 watt electric clothes dryer for one hour consumes 5 kilowatthours of electricity. Continental control systems designs and manufactures the wattnode ac energy meter and accuct current transformers. Single phase kilowatt hour meter 100amp din rail mount nmi approved mtlfkw15110nmi. Power quality metering is typically used by utilities to monitor their grid and by large industrial companies looking to ensure the power being supplied to their big machinery is clean, in order to guarantee optimal efficiency. Implementation of a singlephase electronic watthour meter using the.
Implementation of a 3phase rogowski coil based watt hour. A low cost watt hour energy meter based on the ade7757 by stephen t. A precise fraction of the current flowing in the circuit is diverted to operate the motor. March 5 northeast wisconsin technical college nwtc green bay, wi workshop overview the purpose of this training is to provide not only an educational experience but a practical experience. Watt hour meter slave, repeater, with printing device. They are designed and tested to meet the ansi and iec requirements including all the accuracy tests and effects of external influences. Test methods for transformerrated meters and self contained a base watt hour meter are included in this package as well as a watt hour safety standard. L and n correspond to the voltage inputs from the test setup.
If grounded scope is used, a hazardous condition is created since current will flow through the probe to ground. Download pdf file cts for watthour meters falco specializes in developing current transformers for electricity meters according to specific needs in terms of accuracy, mechanical constraints. Digital electricity meter eletronic polyphase meters marshal. Meter package also establishes performance criteria for thermal demand meters, mechanical demand registers and phase shifting devices used in metering. Watt hour meter bases falco is a leader in the production of bases for electricity meters. The simplest solidstate watt hour meter is completed by adding an electronic register to record the energy consumed. Implementation of a singlephase electronic watthour meter using the msp430f6736a if a test setup needs to be connected, the connections have to be made according to the evm design. Kilowatt hour meters kw hr meters electrical supplies.
Meter type measured quantities a3d 1 watthours only a3t 1 watthours only a3k, a3r, a3q 2 user. A3 alpha meter technical manual tm422190a or later all meters are calibrated and tested before shipme nt. Space terminal are standard on this series, but wire leads can be ordered as an option. When you talk about actual measurement, advanced electronic watt hour meters are. For proper installation, accuracy, and maximum life of the meters, use the following installation procedures. The back of the meter by which it is generally fixed and to which are attached the measuring element, the terminals or the terminal block, and the cover. Dd862 singlephase watthour meter outer and mount dimension dd862 wiring diagram specification and main technical data dd862d glass cover five digital the electromagnetic component is horizontal. Watt meter measures true rms watts this circuit will give you a good, accurate watt meter that can measure various power levels. If the distance exceeds 25 feet, the installation is to be referred to the company for specific approval. Benefits of combined hybrid technologies are evaluated find, read. Using the 6100a electrical power standard to calibrate.
Dual measurement watt hour meter ic bl0932 application note description bl0932 ic is the main chip widely used for singlephase antisteal electronic watthour meters. Watthour meter workshop march 1922, 2018 registration deadline. A3 alpha meter technical manual guggenmos and associates. A9mem2110 modular single phase power meter iem2110 230v 63a with pulse mid. Threephase dinrail kilowatt hour energy meters 7 direct connection panel mounted kilowatt hour energy meters 8 12 ansi ac watt watt hour meters features. If one uses one kilowatt in one hour duration, one unit of energy gets consumed. The most common type of electricity meter is the electromechanical watt hour meter. Watt hour meters history universe of instrumentation. A watt hour meter requires a power supply provided from the three phase network itself.
The following example shows the calculation of watts in an unbalanced polyphase circuit. Precision electronic energy meters can give errors less than 0. The resistor in the circuit of this coil may constitute the. The kh of the meter is what is know as the watt hour constant. The watthour meter unit is isolated from the mains. Robust revenuegrade watt hour and demand meter with advanced recording options aclara portfolio of meters. Voltage from mains is directly fed to a rc based circuit followed by a rectification circuit to provide a dc voltage for the operation of the msp430. The most common unit of measurement on the electricity meter is the kilowatt hour kwh, which is equal to the amount of energy used by a load of one kilowatt over a period of one hour, or 3,600,000 joules. Dual measurement watt hour meter ic bl0932 application note description bl0932 ic is the main chip widely used for singlephase antisteal electronic watt hour meters. They are typically calibrated in billing units, the most common one being the kilowatts hour, which is equal to the amount of energy used by a load of one kilowatt over a period of one hour, or 3,600,000 joules. They include injection molding, stamping, tin plating, crimping of terminals, welding,automatic base testing, 2d labeling, and image. So energy meters measure the rapid voltage and currents, calculate their product and give instantaneous power. The active and apparent power consumption in the voltage circuit including the power.
Concentrator module for kilowatt hourenergy meters 5. Available products include networked bacnet, modbus, and lonworks bidirectional power, energy, and demand meters and pulseoutput watthour transducers. However, the material herein will provide sufficient information for testing. By implementing the watthour meter, we can know how much amount of electrical energy is used by a consumer or a residence or an electrically powered device or a business. The telephone company may make changes in its facilities, equipment, operations, or procedures that could affect the. Use authorized utility procedures to install and service metering equipment. This is the frequency of electricity, measured in hertz, of the power grid in the united states. Meter accuracy can be quantified to discrete levels and can be used to compare different devices. Energy measurements and conversion iowa state university.
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