What is the differance between digital energy meter. 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. Aug 10, 2010 energy meter works on the same principle as the induction motor. What is the working principle of energy meters measure. The internal nonvolatile memory of the microcontroller is used to store the consumed electricity. Mar 02, 2017 this feature is not available right now. As their name suggest, electromechanical energy meters are the combination of mechanical and electrical technology. Its composition and working principle are very different from the traditional induction meter. Types of energy meters and their working principles elprocus. Prepaymentprepaid energy meter introduction and working. 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. In this case, the reading is the current through the resistor and led. A 3phase energy meter has same elements as in case of a singlephase energy meter. Here we discuss the construction and working principle of induction type energy meter.
Different types of energy meters electrical concepts. Mar 27, 2016 there are basically 3 types of energy meters. A mechanical disk present inside the meter rotates when the load applied. This is the diffrence between digital and static energy meter and we may. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic instrumentation and measurement for electrical, electronics, extc. Multifunctional smart meter is a hightech product developed in recent years on the basis of electronic meter. The working principle of multifunctional smart meter. Electronic energy meters product of current and voltage. The result is integrated over the observation time the most used technique is the timedivision multiplier in which pulses are modulated in duration and amplitude of voltage and current accuracy. The basic electronic energy meter senses the current and voltage which signals from the circuitry, converts them in to the digital signal and makes necessary calculations to get the units of electrical energy which has been consumed.
Modern solidstate electronic energy meters also knows as kilowatthour meters, etc. 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. Some meters measured only the length of time for which charge flowed, with no measurement of the magnitude of voltage or current. Ct reduces current to reasonable value for current scaling network. What is the solution for the drawbacks of commonly used energy meters. Some can also measure other electrical quantities such as frequency or even.
Meanwhile, the problem of the distorted current waveform from loads need. The aim of this project is to design a sample meter can accurately display real voltage. 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. Energy meter is divided into induction and electronic two categories. An energy meter is used to measure the energy consumed in the kilowatt hours. Energy meter works on the same principle as the induction motor. 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. The intelligent electronic meter is mainly composed of electronic components, its working principle is through the realtime sampling of user power supply voltage and. Energy meter working principle and construction electronic. The energy is the total power consumed and utilised by the load at a particular interval of time. Energy meter circuit detailed project with source code. All multimeters measure ac and dc voltage voltmeter, ac and dc current ammeter, and resistance ohmmeter. It enables systematic pricing of energy consumed by individual consumer as it measures the amount of electrical energy consumed by a residence, business, or an electrically powered device 1.
Presented here is a simple energy meter using analog devices ade7757 chip for singlephase, 2wire phase and neutral systems used in households. 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. The energy meters are classified into two basic categories, such as. Electronic energy meter is based on digital micro technology dmt and uses no moving parts. What is working principle of electronic energy meter answers. It is often incased in glass and has a disk that rotates that. 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. The block diagram of this project mainly includes power supply unit, a microcontroller, smart card reader, energy meter, buzzer, relay, lcd, smart and led indicators. They can transmit the data to the utilities like energy consumption, parameter values, alarms, etc and also can receive information from utilities such as automatic meter reading system, reconnectdisconnect instructions, upgrading of meter softwares and other important messages. Basic electronic meters are not just more costeffective than mechanical meters, but offer further benefits.
An electric meter or energy meter is an essential device that goes with consumption of commercially distributed energy. As shown in the block diagram, in a typical digital multimeter the input signal i. 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 meter which is used for measuring the energy utilises by the electric load is known as the energy meter.
So energy meters measure the rapid voltage and curren. Jul 25, 2018 energy meters are the basic part to measure the power consumption. This meter is able to perform current, voltage and power measurements in three phase supply systems. A second terminal block between the current transformer and the meter simplifies service work. Electromechanical energy meters engineer experiences. The most common unit of measurement on the electricity meter is the kilowatt hour kwh, which is equal to the amount of. The intelligent electronic meter is mainly composed of electronic components, its working principle is through the realtime sampling of user power supply voltage and current, and then use special electric energy meter ic processing of sampled voltage. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic.
If one uses one kilowatt in onehour duration, one unit of energy gets consumed. Majharul islam08 kazi mahmudul hasan11 shahjalal university of science and technology,sylhet3114 dept. The three phase energy meter has two discs mounted on the common shaft. But these are now being gradually replaced by electronic digital energy meters. Aug, 2006 basic block diagram of an electronic energy meter. The energy is the total power consumed and utilised.
Controlling of electricity theft using smart prepaid. These meters are called as electricity meters, electric meters, electrical. 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 meter which is used for measuring the power of three phase supply is known as the three phase energy meter. 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. A digital multimeter dmm is an instrument that can measure several basic electrical quantities and shows the measurement with a number in a display. The meter is connected in series with the components by breaking the circuit. The total energy is the sum of the reading of both the elements. So the eem is known as static energy meter in eem the accurate functioning is controlled by a specially designed ic called. Electrical energy meters principles and applications. Electromechanical energy meters have been the standard for metering the electricity since billing began.
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. Electrical energy meters principles and applications energy management. Digital multimeter working principle analyse a meter. Watthour meter is in fact a measuring device which can evaluate and records the electrical power passing through a circuit in a certain time. When connected to loads, they consume less power and start measuring instantaneous. 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. If a meter is used in combination with a current transformer.
Digital multimeter working principle electrical a2z. This is the diffrence between digital and static energy meter and we may better know that due to this different if minor load is supplied through the meter than kwh reading diffrence found between. The torque of both the elements is added mechanically, and the total rotation of the shaft is proportional to the three phase energy consumption. It is used in domestic and industrial ac circuit for measuring the power consumption.
Induction energy meter uses the principle of electromagnetic induction to voltage, current, phase into magnetic moment, to promote the rotation of the aluminum disc, the disk axis worm drive gear drive the drum of the drum rotation, the process of. This is used in each and every house and industry for calculating the energy consumed by them. Energy meters have its different names according to its function and working principle. 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. 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.
What are the advantages and disadvantages of usual energy meters. A wide variety of 3 phase energy meter working principle options are available to you. So, electronic type of threephase energy meter is explained below with its working principle. Electronic single phase watthour meter adopts largescale ic, the latest microelectronic technologies and smt techniques. This load can be domestic, commercial or industrial. Controlling of electricity theft using smart prepaid energy meter. As in the block diagram, the meter has a power supply, a metering engine, a processing and communication engine i. Energy meters are the basic part to measure the power consumption. What is the solution for the drawbacks of commonly.
Analog multiplier gives a dc voltage proportional to the product of the voltage and current drawn from. The power companies benefits from eem in three significant ways. Electric utilities use electric meters installed at customers. 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. By using these three phase meters, it is also possible to measure high voltages and currents by using appropriate. An electricity meter, electric meter, electrical meter, or energy meter is a device that measures.
Electronic meters display the energy used on an lcd or led display, and some can also transmit readings to remote places. In order to accurately measure the electronic energy used for a electronic energy meter, suitable hardware and software have to be designed. One carries a voltage coil so its flux is proportional to voltage, the second carries a current coil so its flux is proportional to current. After calibrating voltage, the meter can be calibrated in terms of ohms. The working principle of the energy meter news zhejiang. Electronic energy meter industrial applications vishay. This article discusses an overview of energy meter, its various types electromechanical induction, electronic and smart energy meter.
An electronic energy meter eem functionally outperforms the traditional ferraris wheel meter. Draw and describe working of electronic energy meter. The basic unit of power is watts and it is measured by using a watt meter. The working principle of an electronic energy meter is a device that measures the electronic energy consumed usually in kwh. 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. Energy meter working principle construction types of energy. These are capable of communicating in both directions. The three phase meter is constructed by connecting the two single phase meter through the shaft. An aluminium disc is placed inside a magnetic core with two limbs. Digital signal processor or high performance microprocessors are used in digital electric meters. Electric utilities use electric meters installed at customers premises for billing and monitoring purposes. The energy meter is nothing but a device or instrument which is used to measure the amount of electrical energy consumed by the consumer or the load.
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