The kh of the meter is what is know as the watt hour constant. Watthour meter interface module can be exclusively used for dms 2 power distribution, displaying power consumption for each watthour meter. Three phase portable energy meter calibration equipment. On gas meters, do not write down any numbers from the following if your meter has them. If you have an electricity single rate smart meter, the display will automatically show the reading. Reconditioned, ac kilowatthour meter 240v this energy meter with electronic lcd register displaying 5 digits. The a3 alpha meter is a very accurate revenue meter 0. Watthour meter publisher san francisco, technical pub. These utility grade meters have been removed from service and reconditioned and certified. Implementation of a singlephase electronic watthour meter using the. Voltage from mains is directly fed to a rcbased circuit followed by rectification. Details of the current circuit showing the twostage. The above drawing shows a simple single phase motor circuit, which contains a.
Watthour meter is in fact a measuring device which can evaluate and records the electrical power passing through a circuit in a certain time. Kilowatt hour meters kw hr meters electrical supplies. Watthour meter operating principles and construction. Therefore, all apparatus submitted for calibration should be free of defects and in proper working. The p4460 kill a watt ez is an easy to use consumer power meter allowing the user to accurately measure power consumption of household appliances and to determine the actual cost of power consumed. If one uses one kilowatt in one hour duration, one unit of energy gets consumed. Use only on single phase, 240 volts, 200 amps max, 3 wire services. Handbook on electricity meters asiapacific economic cooperation. Watthour meter maintenance and testing, january 1992. 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. Scribd is the worlds largest social reading and publishing site. 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. So energy meters measure the rapid voltage and currents, calculate their product and give instantaneous power. The basic unit of power is watts and it is measured by using a watt meter.
Meter type measured quantities a3d 1 watthours only a3t 1 watthours only a3k, a3r, a3q 2 user. Software package also includes a dummy application for quick and easy evaluation of the hardware and software. Meter socket, 200 amp, 1phase, 4 jaw, 600 volt ac, ringtype, without bypass, ug. Watthour meter definition is a device to record electric energy usually in kilowatthours. Light commercial kilowatt hour meter, 3phase, 120277 volt autoranging power supply suitable for both 277480v, 4w, wye and 240480v 4wire delta services, 7 jaw. The unit will also project, in real time, the cost of continued use of the appliance in time periods of hour, day, week, month, and year.
The focus meter was designed to be a lowcost, solidstate, kwhonly meter as an alternative metering and amr platform to the induction meter. Watthour meter article about watthour meter by the. Publication date 199908 topics homebrew, test equipment, watthour meter, measurement, meter collection. Watt hour meter test free download as powerpoint presentation. Dae ddm720 240v kwh meter 100 amp internal ct 60 hz pass through. 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. Whatever the criteria, the calibration system must have the ability to have. The gf302d1 three phase portable energy meter test system consists of an integrated three phase current and voltage sourceup to 500v120a or 500v20a and builtin threephase electronic reference standard of accuracy class 0. Total ratings 5, p3 international p4490 kill a watt edge. Let ez meter help you accomplish your energy goals. The meter is based on reliable, field proven digital multiplication measurement technique. Neoikos digital engine hour meter for mover lawn mower boat yamaha ski dirt quad dirt bike marine atv motorcycle snowmobile small engine generator cropper basic version 5. For gas smart meters, press and hold the red button a for 5.
A calibration service for wattmeters and watthour meters gpo. The kh of the meter is what is know as the watthour constant. The meter provides advanced fourquadrant revenue functions, transformer and line loss compensation, and increased data profiling without adding hardware option boards. Magnetic principles and their relationship to current flow are examined to show what makes the meter disk spin. Implementation of a 3phase rogowski coil based watt hour. If one uses one kilowatt in onehour duration, one unit of energy gets consumed. Implementation of a singlephase electronic watthour meter using. How the electric utility industry generates and delivers power to its customers covering basics, delivery, safety and generation. Shallenberger at westinghouse figured out how to build the worlds first accurate watt hour meter. A label on the meter nameplate contains the fcc registration number and ringer equivalence number ren for this. 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. This is the frequency of electricity, measured in hertz, of the power grid in the united states. Using the 6100a electrical power standard to calibrate.
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. Requirements for watthour meter sockets 1 scope this standard covers the general requirements and pertinent dimensions applicable to watthour meter sockets rated up to and including 600 v and up to and including 320 a continuous duty per socket opening. Pdf an electronic watthour meter in hybrid thick and thin film technology is described. On electricity meters, do not write down any numbers from the following if your meter has them. Contents a3 alpha meter technical manual viii tm422190b 2003. Facilities instructions, standards, and techniques volume 310. Watthour meters are customarily calibrated by determining the percentage registration, that is, the percentage of the energy passed through the meter in a short time interval. Watthour meter an electrical energy meter, that is, an electricity meter that measures and registers the. However, because most circuit breakers in homes are 15 amps, i made my unit to have a range of zero to 1500 watts. 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. Single phase kilowatt hour meter 100amp din rail mount nmi approved mtlfkw15110nmi.
It really is a simple thing to do and this article will explain. This device is made up from power, current and voltage transformers, who measure the average power. However, the material herein will provide sufficient information for testing. Although there are several different types of watthour meters, each consists essentially of a small electric motor and a counter. Download fulltext pdf download fulltext pdf hybrid electronic watthour meter article pdf available in electrocomponent science and technology 634 january 1980 with 44 reads. Play now summary this 38minute video covers the operating principles and physical construction of electromechanical watthour meters.
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. The most often question that i am asked about watthour meter multipliers is how to calculate the watthour meter multiplier. Pocket guide to watthour meters alexander publications. Watt meter measures true rms watts this circuit will give you a good, accurate watt meter that can measure various power levels. Watthour meter multipliers are used whenever current transformers andor voltage transformers are used in a metering circuit. Watt hour meters history universe of instrumentation. Enter your email below to receive free informative articles on electrical. Implementation of a singlephase electronic watthour. Watthour meter principles 1 instant video alexander.
Watthour meter, device that measures and records over time the electric power flowing through a circuit. The meter platform will measure energy accurately over varying environmental conditions. Gst matelec kw hour meter 3 phase 100amp direct online class 1 lcd display fkw15120. Free electricity generator 220v cfl energy light bulb new ac electric generator. Total ratings 4, p3 international p4460 125v electricity usage monitor. Training sessions basic components 5 minutes identifies the basic compon. Watthour meter test free download as powerpoint presentation. L and n correspond to the voltage inputs from the test setup.
If you have an electricity dual rate smart meter, press and release the blue display button and this will show rate two. By implementing the watthour meter, we can know how much amount of electrical energy is used by a consumer. A1 calibration of standard wattmeter circuit diagram, direct. Voltage from the mains is fed directly to an rcbased circuit followed by. Watthour meter definition of watthour meter by merriam.
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