Energy is the product of current and voltagein the case of 3 phase supply power factor must be considered. Jul 25, 2018 energy meters are the basic part to measure the power consumption. Energy meter working principle and construction electronic. The basic electronic energy meter senses the current and voltage which signals from the circuitry, converts them in to the. If one uses one kilowatt in onehour duration, one unit of energy gets consumed. Electronic meters measure energy using highly integrated components or other customized integrated circuits. As their name suggest, electromechanical energy meters are the combination of mechanical and electrical technology. 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. What is the solution for the drawbacks of commonly used energy meters. 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. The aim of this project is to design a sample meter can accurately display real voltage. 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.
One meter for the 240v and 2 meters for each side of the 120v. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic instrumentation and measurement for electrical, electronics, extc. Digital multimeter working principle electrical a2z. Another possible principle upon which to build a meter was to create some motion oscillation or rotation proportional to the energy, which could then drive a register to read. This meter is able to perform current, voltage and power measurements in three phase supply systems. An energy meter is used to measure the energy consumed in the kilowatt hours. 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.
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. As shown in the block diagram, in a typical digital multimeter the input signal i. Electronic energy meter is based on digital micro technology dmt and uses no moving parts. 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. Electromechanical energy meter measure energy by counting revolution. A mechanical disk present inside the meter rotates when the. The working principle of multifunctional smart meter. The basic principle of induction type energy meter is electromagnetic induction. Meanwhile, the problem of the distorted current waveform from loads need to be considered. 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. This type of energy meter measures electrical energy in a kilowatt hour. The traditional form of wattmeter is called as dynamometer wattmeter. An electric meter or energy meter is an essential device that goes with consumption of commercially distributed energy. This device is available in a purely electronic form too which is known as digital wattmeter.
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. Mar 28, 2017 basic working principle of all energy meters are same except disk type energy meter. Jun 12, 2019 but still, we need to know the basic function and constructional features of induction type single phase watt hour meter for our knowledge base. The measurement of energy is accomplished by means of a voltagefrequency converter connected downstream from the power meter. The digital multimeter dmm is the most widely used electronic measuring instrument.
Prepaymentprepaid energy meter introduction and working. In an electronic meter, the energy used is not determined through moving mechanical elements, but with electrical components such as rogowski coils, shunt. 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. Draw and describe working of electronic energy meter.
The internal nonvolatile memory of the microcontroller is used to store the consumed electricity. 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. Based on the flow of current, the ferriwheel rotates which makes rotation of other wheels. It is often incased in glass and has a disk that rotates that measures the amount of power product of current and voltage the flows through the meter. Electromechanical induction type meter electronic meter or solid state meter 5.
The conventional mechanical energy meter is based on the phenomenon of magnetic induction. What is working principle of electronic energy meter answers. The working principle of the energy meter news zhejiang. What is the working principle of energy meter answers.
Majharul islam08 kazi mahmudul hasan11 shahjalal university of science and technology,sylhet3114 dept. As disk type energy meters are obsolete there is no need to discuss them here. Mar 28, 2017 induction type energy meter used invariably to measure the energy consumed in any a. It is often incased in glass and has a disk that rotates that. Bidirectional metering is available to customers who install renewable fuel generators such as solar, wind, hydro or biomass sources and operate the generator in parallel with their electric companys electrical system. A wide variety of electronic energy meter working options are available to you, such as free samples. Electronic energy meters product of current and voltage. Pdf a single phase microcontroller based energy meter. Analog multiplier gives a dc voltage proportional to the product of the voltage and current drawn from. The resonance is the condition exists in the circuit when their inductance and capacitance reactance are of equal magnitude. 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 power companies benefits from eem in three significant ways. Energy meter is divided into induction and electronic two categories. Electronic meters need for prepaid energy meter system. They induce energy which is oscillating between the electric and. 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. The energy meters are classified into two basic categories, such as. Basic electronic meters are not just more costeffective than mechanical meters, but offer further benefits. Finally plan to test the 120v meter on my honda 6500w generator which outputs 30a at 240v on one of the connectors. When alternating current flow though two suitably located coils produces. Here we discuss the construction and working principle of induction type energy meter.
When connected to loads, they consume less power and start measuring instantaneous. There are many types of energy meters having different working principle. Energy meter working principle construction types of energy. Induction type watt hour meter or energy meter about circuit. So, electronic type of threephase energy meter is explained below with its working principle. 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. The working principle of an electronic energy meter is a device that measures the electronic energy consumed usually in kwh. 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. 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. Watthour meter is in fact a measuring device which can evaluate and records the electrical power passing through a circuit in a certain time.
Electronic meters display the energy used on an lcd or led display, and some can also transmit readings to remote places. It is used everywhere, no matter how big or small consumption it is. Electric utilities use electric meters installed at customers premises for billing purposes. Aug 31, 2019 energy meter or watthour meter is an electrical instrument that measures the amount of energy used by the consumers. By implementing the watthour meter, we can know how much amount of electrical energy is used by a. Its composition and working principle are very different from the traditional induction meter. In this case, the reading is the current through the resistor and led. A mechanical disk present inside the meter rotates when the load applied. Electrical energy meters principles and applications energy management. Types of energy meters and their working principles elprocus.
After calibrating voltage, the meter can be calibrated in terms of ohms. That is why sometimes we call this meter as kilowatthour meter. The basic unit of power is watts and it is measured by using a watt meter. 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. 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. Controlling of electricity theft using smart prepaid energy meter.
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. Electronic single phase watthour meter adopts largescale ic, the latest micro electronic technologies and smt techniques. A smart meter is an electronic device that records consumption of electric energy and communicates the information to the electricity supplier for monitoring and billing. To test and troubleshoot circuits, it is necessary to understand how to use basic electronic measuring instruments.
An electricity meter, electric meter, electrical meter, or energy meter is a device that measures. The electronic energy meter is also better protected against tampering than its mechanical predecessor, and units for prepaid operation e. 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. This electronic meter does not possess any rotating parts, and the. This article discusses an overview of energy meter, its various types electromechanical induction, electronic and smart energy meter. Mar 02, 2017 how to make free energy generator 220v with 3kw alternator and 1 hp motor recycle free electricity duration. The following is a basic explanation of how bidirectional metering works. The ac kilowatt hour meters used at present operate on the same principle as blathys original invention. If a meter is used in combination with a current transformer. The meter is connected in series with the components by breaking the circuit. A second terminal block between the current transformer and the meter simplifies service work. It is used in domestic and industrial ac circuit for measuring the power consumption.
Energy meters are the basic part to measure the power consumption. 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. Types of energy meter em there are two types of em which works on different mechanism. Mar 29, 2019 watt hour meter or energy meter is an instrument which measures amount of electrical energy used by the consumers. 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. Digital multimeter working principle analyse a meter.
Electromechanical energy meters engineer experiences. In the case of electronic energy meter different transducers are used to calculate i,v and p. Basic working principle of all energy meters are same except disk type energy meter. This paper presents a single phase electrical energy meter based on a microcontroller from microchip technology inc. The working of single phase induction type energy meters are based on two main fundamentals. Smart meters typically record energy hourly or more frequently, and report at. The energy is the total power consumed and utilised by the load at a particular interval of time. When used in electricity retailing, the utilities record the values measured by these meters to generate an invoice for the electricity. The dynamometer wattmeter works on the motor principle. They induce energy which is oscillating between the electric and magnetic field of the capacitor and inductor respectively. To understand the basics, simple digital energy meters is the best option because all the other meters are merely an upgraded form of them. These meters are called as electricity meters, electric meters, electrical. So, an electronic type of threephase energy meter is explained below with its working principle. Ct reduces current to reasonable value for current scaling network.
An electronic energy meter eem functionally outperforms the traditional ferraris wheel meter. If this works ok, plan to build another box with 3 meters in it. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic. Electronic energy meters are the accurate, precise and reliable type of measuring instruments when compared to electromechanical induction type meters. Meanwhile, the problem of the distorted current waveform from loads need. 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. 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. Digital signal processor or high performance microprocessors are used in digital electric meters. The electric meter measures the current flow through the service entrance. Electrical energy meters principles and applications. Energy meters have its different names according to its function and working principle. What is the working principle of an electrical energy meter. Working on a 240v meter in a box which i will have done soon to test my amateur radio linear amplifier. It has a rotating aluminium wheel called ferriwheel and many toothed wheels.
The individual pulses are then summated through the use of an electromechanical meter, and are made available at a pulse output as well. Different types of energy meters electrical concepts. This is used in each and every house and industry for calculating the energy consumed by them. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. It enables systematic pricing of energy consumed by individual consumer as it measures the amount of electrical energy consumed by a. In addition to measuring energy used, electronic meters can also record other parameters of the load and supply such as instantaneous.
Single phase meter wiring diagram energy meter single. 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. The energy is the total power consumed and utilised. A wide variety of energy meter working options are available to you, such as application, phase, and display type. Energy meter is an integrating instrument which measures the total quantity of electrical energy supplied to the circuit in given period. What are the advantages and disadvantages of usual energy meters. What is the working principle of energy meters measure. 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. In order to accurately measure the electronic energy used for a electronic energy meter, suitable hardware and software have to be designed. A 3phase energy meter has same elements as in case of a singlephase energy meter. 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. Electronic energy meter working wholesale, energy meter. Although the induction meter would only work on alternating current, it eliminated the delicate and troublesome. About 0% of these are energy meters, 0% are power meters.
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