Watthour meter is in fact a measuring device which can evaluate and records the electrical power passing through a circuit in a certain time. Induction energy meters, measurement error, obsolescence. It enables systematic pricing of energy consumed by individual consumer as it measures the amount of electrical energy consumed by a. The electric meter measures the current flow through the service entrance and into your personal electrical service panel. A useful meter for measuring alternating and direct current is the clamp meter, which does not require the circuit to be broken to insert the meter.
Still i will try my best to sort out different types of energy meters in some simple manner. The power companies benefits from eem in three significant ways. Rotameter working principle animation instrumentationtools. The meter is connected in series with the components by breaking the circuit. 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. Pdf this paper presents a single phase electrical energy meter based on a microcontroller from. Digital multimeter working principle analyse a meter. The conventional method of electricity billing involves a person from the distribution unit reading the number of units of electricity consumed in the energy meter, conveying this information to the distribution unit and then preparing the bill according to the units consumed for a fixed amount of time. This electronic meter does not possess any rotating parts, and the energy consumption can be easily. Electronic meters display the energy used on an lcd or led display, and some can also transmit readings to remote places. The digital multimeter dmm is the most widely used electronic measuring instrument. If one uses one kilowatt in onehour duration, one unit of energy gets consumed.
Based on the flow of current, the ferriwheel rotates which makes rotation of other wheels. Energy meter circuit detailed project with source code. Electronic single phase watthour meter adopts largescale ic, the latest micro electronic technologies and smt techniques. Energy meters are the basic part to measure the power consumption. What are the different types, how do they work and what are the health issues.
Electromechanical energy meters have been the standard for metering the electricity since billing began. A mechanical disk present inside the meter rotates when the load applied. Here we discuss the construction and working principle of induction type energy meter. Different types of energy meters electrical concepts. Rs485 bus two way threephase energy meter dsz14wdrs3x5a mid. As their name suggest, electromechanical energy meters are the combination of mechanical and electrical technology. The focus meter was designed to be a lowcost, solidstate, kwhonly meter as an alternative metering and amr platform to the induction meter.
After calibrating voltage, the meter can be calibrated in terms of ohms. Types of energy meters and their working principles elprocus. Pdf study of active electric energy meters behavior of induction. Electronic energy meters product of current and voltage. The energy is the total power consumed and utilised. So energy meters measure the rapid voltage and curren. Jun 30, 2018 working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic instrumentation and measurement for electrical, electronics, extc. Mar 27, 2016 there are basically 3 types of energy meters. An electricity meter, electric meter, electrical meter, or energy meter is a device that measures the amount of electric energy consumed by a residence, a business, or.
Analog multimeter working principle electrical academia. What is the working principle of energy meters measure. Basic working of a modern electronic energy meter as in the block diagram, the meter has a power supply, a metering engine, a processing and communication engine i. The aim of this project is to design a sample meter can accurately display real voltage. What are the advantages and disadvantages of usual energy meters.
Electromechanical type the electromechanical induction meter operates by counting the revolutions of a nonmagnetic, but electrically conductive, metal disc which is made to rotate at a speed pro. Mar 28, 2017 the function of recording or registering mechanism is to record continuously a number on the dial which is proportional to the revolutions made by the moving system. In the case of electronic energy meter different transducers are used to calculate i,v and p. The mechanical meters for electricity, gas and water are being replaced with new digital meters in much of the industrialized world. It belongs to a class of meters called variable area meters, which measure flow rate by allowing the crosssectional area the fluid travels through, to vary, causing a measurable effect. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic instrumentation. In addition to measuring energy used, electronic meters can also record other parameters of the load and supply such as instantaneous and maximum rate of usage demands, voltages, power factor and reactive power used etc. Jul 25, 2018 energy meters are the basic part to measure the power consumption.
Threephase and singlephase energy meters, highquality pdf. Digital multimeter working principle electrical a2z. Digital meters are introduced, as are types of voltmeters and ammeters operating on different techniques of analogtodigital signal converters. This meter is able to perform current, voltage and power measurements in three phase supply systems. When connected to loads, they consume less power and start measuring instantaneous. Electronic energy meter is based on digital micro technology dmt and uses no moving parts. The three phase energy meter has two discs mounted on the common shaft. Aug 10, 2010 an electric meter or energy meter is a device that measures the amount of electrical energy supplied to or produced by a residence, business or machine. It involve four steps in its working driving force moving system breaking system registering system 7.
This device is available in a purely electronic form too which is known as digital wattmeter. The rotation of this disk is base of energy measurement 8. An energy meter is used to measure the energy consumed in the kilowatt hours. The aim of this project is to design a sample meter can accurately display real voltage, current, power and energy used during one day. Implementation of a singlephase electronic watthour meter. Specifically, elements of hardware included the power supply, interface circuit, suitable launch pad with microcontroller. 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. As shown in the above figure, the wattmeter has two sets of coils. An electric meter or energy meter is an essential device that goes with consumption of commercially distributed energy.
The working principle of an electronic energy meter is a device that measures the electronic energy consumed usually in kwh. Analog multimeter uses an electromechanical component called a darsonval movement to move the pointer along the scales to display measured values when the test leads are connected to a circuit, device, or circuit component. What are the various safety measures to be taken while performing practical work in electrical science lab. The basic principle of induction type energy meter is electromagnetic induction. In order to accurately measure the electronic energy used for a electronic energy meter, suitable hardware and software have to be designed. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic. Study of single phase induction type energy meter or watt. The electronic energy meter is also better protected against tampering than its mechanical predecessor, and units for prepaid operation e.
Single phase induction type energy meter construction, working principle,operation,creeping,torque equation the measurement of energy is the same process as measurement of power except that the instrument not merely indicates the power or rate of supply of energy but must take into account also the length of time for which the rate of energy is. When alternating current flow though two suitably located coils produces rotating magnetic field which is cut by the metallic disc suspended near to the coils thus emf induce in the disc which is circulates eddy current in it. Socket switching actuator fsva230v10a with current measurement. Nov 29, 2014 the traditional form of wattmeter is called as dynamometer wattmeter. Electrical energy meters for partial consumption electronic threephase energy meter with indirect connection, assembly on din rail or adaptable to panels electronic threephase meter active and reactive energy with indirect connection for din rails or adaptable to a panel. Understanding the basic theory of shieldedpole shunt magnet. A rotameter is a device that measures the flow rate of liquid or gas in a closed tube rotameter. The software supports calculation of various parameters for singlephaseenergy measurement. The conventional mechanical energy meter is based on the phenomenon of magnetic induction. The meter platform will measure energy accurately over varying environmental conditions.
This meter is able to perform current, voltage and power measurements in. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. The meter is based on reliable, field proven digital multiplication measurement technique. Prepaymentprepaid energy meter introduction and working. Electromechanical energy meters engineer experiences. The dynamometer wattmeter works on the motor principle. Electric utilities use electric meters installed at customers premises for billing and monitoring purposes. When used in electricity retailing, the utilities record the values measured by these meters to generate an invoice for the electricity. There are many basic types of energy meters that it is not an easy task to categorize them.
What is the working principle of wattmeter and an energy meter. The single phase electrical energy meter principle block diagram is shown in fig. It is often incased in glass and has a disk that rotates that measures. Eddy current generated in disc by the voltage coil. The measurement of energy is accomplished by means of a voltagefrequency converter connected downstream from the power meter. A 3phase energy meter has same elements as in case of a singlephase energy meter. Meanwhile, the problem of the distorted current waveform from loads need to be considered. Implementation of a singlephase electronic watthour meter using msp430afe2xx rev. This is the power which is used to drive the shaft in the electric motor. Utilities install these instruments at every place like homes, industries, organizations to charge the electricity consumption by loads such as lights, fans and other appliances. Meanwhile, the problem of the distorted current waveform from loads need.
It is often incased in glass and has a disk that rotates that. A list of some manufacturers of electronic voltmeters, ammeters, and oscilloscopes is. An electricity meter, electric meter, electrical meter, or energy meter is a device that measures the amount of electric energy consumed by a residence, a business, or an electrically powered device. As in the block diagram, the meter has a power supply, a metering engine, a processing and communication engine i. It is used in domestic and industrial ac circuit for measuring the power consumption. This is used in each and every house and industry for calculating the energy consumed by them.
Electromagnetic flow meters working principle electromagnetic flow meters, simply known as mag flow meter is a volumetric flow meter which is ideally used for waste water applications and other applications that experience low pressure drop and with appropriate liquid conductivity required. Electronic energy meter industrial applications vishay. So the eem is known as static energy meter in eem the accurate functioning is controlled by a specially designed ic called asic application specified integrated circuit. The torque of both the elements is added mechanically, and the total rotation of the shaft is proportional to the three phase energy consumption. Majharul islam08 kazi mahmudul hasan11 shahjalal university of science and technology,sylhet3114 dept. Sep, 2011 an electric meter or energy meter is a device that measures the amount of electrical energy supplied to or produced by a residence, business or machine. Aug, 2006 basic block diagram of an electronic energy meter. Pdf a single phase microcontroller based energy meter. This application report has the complete metrology source code.
Electrical energy meters principles and applications. The individual pulses are then summated through the use of an electromechanical meter, and are made available at a pulse output as well. What is the solution for the drawbacks of commonly used energy meters. If a meter is used in combination with a current transformer. What is the working principle of energy meter answers. It has a rotating aluminium wheel called ferriwheel and many toothed wheels. As shown in the block diagram, in a typical digital multimeter the input signal i.
The electric meter installed in your home is the device that allows the utility department to charge you monthly on the amount of energy you have consumed. In this case, the reading is the current through the resistor and led. Handbook on electricity meters asiapacific economic cooperation. This explains why electronic voltmeters do not load. It is used everywhere, no matter how big or small consumption it is. Moving system energy meter has a moveable aluminum disk in it which is mounted on a vertical shaft. The following measurement values can be obtained using trivector meter. The key parameters calculated during energy measurements are root mean square rms current and voltage, active and reactive power and energy, power factor, and frequency.
Presented here is a simple energy meter using analog devices ade7757 chip for singlephase, 2wire phase and neutral systems used in households. 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. One important advantage of eem is that in non linear loads, its metering is highly accurate and electronic measurement is more robust than that of the conventional mechanical meters. An electric meter or energy meter is a device that measures the amount of electrical energy supplied to or produced by a residence, business or machine. An analog multimeter is a meter that can measure two or more electrical properties and display the measured properties along calibrated scales using a pointer. Generally, one electronic energy meter consists of hardware and software. The result is integrated over the observation time the most used technique is the timedivision. Jul 02, 2018 block diagram, working principle and construction of digital multimeter in digital instruments video lecture of analog and digital instruments chapter in subject electronic instrumentation and. Watt hour meter or energy meter is an instrument which measures amount of electrical energy used by the consumers. Implementation of a singlephase electronic watthour. To test and troubleshoot circuits, it is necessary to understand how to use basic electronic measuring instruments. The more advanced models are called smart meters, while the simple models are called amr meters. Trivector meter is an energy meter which accurately measures all the parameters of supply such as voltage, current, power factor, active load, reactive load, apparent load etc. The basic unit of power is watts and it is measured by using a watt meter.
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