Basic electronic energy meter measurement takes place by counting the led pulses at the rate of 3200 pulses per unit of electricity. Implementation of a singlephase electronic watthour meter. Smart card, which is the switch, gives information about the limitation of units. When connected to loads, they consume less power and start measuring instantaneous.
A second terminal block between the current transformer and the meter simplifies service work. Watt hour meter or energy meter is an instrument which measures amount of electrical energy used by the consumers. The metal disk is nonmagnetic, but electrically conductive. Saving of more than 30% over coventional meters meter records correct energy with same accuracy under reverse current connection led indication for current reversal tampering and phase availability an iso9001. Electromechanical energy meter measure energy by counting revolution of a rotating disk. Pdf electronic energy meter is capable of taking readings and can store it into its memory. 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. Meanwhile, the problem of the distorted current waveform from loads need to be considered. Energy meter is an electrical measuring device, which is used to record electrical energy consumed over a specified period of time in terms of units. Electronic energy meter takes place of software system.
Provide descriptions of applications for meters, data, and data analysis. Electronic meters need for prepaid energy meter system. Electronic wattmeter a modern digital electronic wattmeter energy meter samples the voltage and current thousands of times a second. One unit equals one kwh killowatthour or watthours. This article describes the different types of meters, what the problems with them are and why the utilities promote them. Handbook on electricity meters asiapacific economic.
The energy is the total power consumed and utilised by the load at a particular interval of time. This article is really good kurrey consultancy services november 25, 2018 at 2. 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. This document will guide you through the many options and solutions available from microchip technology inc. In order to accurately measure the electronic energy used for a electronic energy meter, suitable hardware and software have to be designed. Induction type energy meter used invariably to measure the energy consumed in any a. Electronic energy meters are accurate, precise and reliable type of measuring instruments when compared to electromechanical induction type meters.
Electronic energy meter industrial applications vishay. Here we discuss the construction and working principle of induction type energy meter. The energy is the total power consumed and utilised. As their name suggest, electromechanical energy meters are the combination of mechanical and electrical technology. An electric meter or energy meter is an essential device that goes with consumption of commercially distributed energy. So, electronic type of threephase energy meter is explained below with its working principle. The q meter uses in a laboratory for testing the radio frequency of the coils. 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.
How electronic energy meter works mohans electronics blog. Accuracy was better than 97% in the work of and power is shown in fig. 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. What is the solution for the drawbacks of commonly used 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 an electrically powered device. Working example of measuring energy units using the electronic energy meter. The average of the instantaneous voltage multiplied by the current is the true power. Electric utilities use electric meters installed at customers premises for billing and monitoring purposes.
Implementation of a singlephase electronic watthour. The primary controller collects information from energy meter as well as from the smart card. Implementation of a singlephase electronic watthour meter using msp430afe2xx rev. Now, the meter for this program isnt really smart in the sense of that it is sending my usage data wirelessly to the utility. In every residence, malls, industry, everywhere energy meters are used to measure the electrical energy consumed. Electronic meters typically have three modes of operation. Executive summary there are several types of electronic meters available. 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. A mechanical disk present inside the meter rotates when the load applied. Threephase ctpt operated keypad energy meter operation. Calculate the number of revolutions made by it, when connected to a load carrying 40 a at 230v and 0. The meter is provided with a field to which entries can be made for this purpose ct or vt factor. But these are now being gradually replaced by electronic digital energy meters. Allelectronic power and energy meters analog devices.
The ad775x family of energymeasuring integrated circuits accepts voltage inputs. They are typically calibrated in billing units, the most common one being the kilowatt. When measurements are performed with upstream transformers, the displayed energy value must be multiplied by the transformation ratios. Electronic meters display the energy used on an lcd or led display, and some can also transmit readings to remote places. Oct 07, 2018 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. Pdf reliability prediction approaches for domestic.
An energy meter is used to measure the energy consumed in the kilowatt hours. 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. What are the advantages and disadvantages of usual energy meters. The three phase meter is constructed by connecting the two single phase meter through the shaft. Pdf automatic energy meter reading using smart energy meter. Electrical energy meters principles and applications.
The three phase energy meter is used for measuring the large power consumption. Implementing an electronic meter does not have to be a complex endeavor. Energy meters are the basic part to measure the power consumption. Mar 28, 2017 induction type single phase energy meter. Use eye protection when experimenting on your own circuits. 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. A unit of electricity refers to the kilo watt units of power consumed in the given time in hours. The individual pulses are then summated through the use of an electromechanical meter, and are made available at a pulse output as well.
The aim of this project is to design a sample meter can accurately display real voltage, current, power and energy used during one day. Electricity power theft prevention techniques, working. Basic electronic meters are not just more costeffective than mechanical meters, but offer further benefits. The concerns are both about the meters which transmit using wireless and those. 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. Those consumers which consume large energy needs better technology to manage their energy consumption and need more data to improve their services. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic instrumentation. Reliability prediction approaches for domestic intelligent electric energy meter based on iec62380 article pdf available in iop conference series earth and environmental science 1085. Electromechanical energy meters have been the standard for metering the electricity since billing began. 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. This meter is able to perform current, voltage and power measurements in three phase supply systems. Prepaymentprepaid energy meter introduction and working. Energy meter is an integrating instrument which measures the total quantity of electrical energy.
It is often incased in glass and has a disk that rotates that. Aug, 2006 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. Oct 30, 2017 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. After it user needs to open it and find the pulse led or cal leds terminals cathode and anode. Use mydaq digital multi meter dmm to test mysnap components if they appear to be damaged or not working properly. This application report has the complete metrology source code. The performance tests of an energy meter as per iec standards are divided mainly in three segments which include its mechanical aspects, electrical circuiting, and climatic conditions. If a meter is used in combination with a current transformer. The working principle of an electronic energy meter is a device that measures the electronic energy consumed usually in kwh.
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. Pdf it is undoubtedly that in the future, energy would cost more as the direct result. Electronic energy meter is based on digital micro technology dmt and uses no moving parts. The prototype is integrated with an interval meter, mk 6 genius electric meter. This explains why electronic voltmeters do not load. Electromechanical induction type meter electronic meter or solid state meter 5. It is used in domestic and industrial ac circuit for measuring the power consumption. The total energy is the sum of the reading of both the elements. Some are read monthly, while others transmit data every few seconds.
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. 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. This is the power which is used to drive the shaft in the electric motor. It enables systematic pricing of energy consumed by individual consumer as it measures the amount of electrical energy consumed by a. It also explains the properties of the coil and capacitor. These electronic meters use micro controllers with their own programming language.
The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. In the case of electronic energy meter different transducers are used to calculate i,v and p. Types of energy meter em there are two types of em which works on different mechanism. The true power divided by the apparent voltamperes va is the power factor. Different types of energy meters electrical concepts. 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. First user need to buy an analogue electricity energy meter. Now solder two wires at both the terminals and take it out from the energy meter and then close energy meter and tight the screws. Threephase ctpt operated keypad energy meter 10 shenzhen inhemeter co. An electronic energy meter eem functionally outperforms the traditional ferraris wheel meter. The q meter measures the quality factor of the circuit which shows the total energy dissipated by it.
A 3phase energy meter has same elements as in case of a singlephase energy meter. The software supports calculation of various parameters for singlephaseenergy measurement. Jan 01, 2016 types of energy meter em there are two types of em which works on different mechanism. Energy meter circuit detailed project with source code. Kamstrup ultrasonic heat meters are produced to mid approval en1434 a stringent european standard that ensures that the accuracy and quality remain constant, so you can be confident that every meter is as good as the last. How to check accuracy of energy meters engineer experiences. There are major three methods to compare accuracy of an energy meter. Presented here is a simple energy meter using analog devices ade7757 chip for singlephase, 2wire phase and neutral systems used in households. Electromechanical energy meters engineer experiences. The work presented by 3 has developed a prepaid meter billing application. Working on a 240v meter in a box which i will have done soon to test my amateur radio linear amplifier. 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. The meter which is used for measuring the power of three phase supply is known as the three phase energy meter. Electronic single phase watthour meter adopts largescale ic, the latest micro electronic technologies and smt techniques.
If this works ok, plan to build another box with 3 meters in it. Always remove power if circuit does not perform properly, and then use mydaq dmm to check circuit for shorts or opens. Pdf electronic energy meter with remote monitoring and billing. When the energy meter is connected in circuit, the current coil carries the load current and pressure coil carries the current proportional to the supply voltage. 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 electric utilities use electric meters installed at customers premises for billing and monitoring purposes. What is the working principle of energy meter answers. Implementing an electronic energy meter, for example, can be as simple and inexpensive as using a single dedicated energy measurement ic mcp3905 and a displaycounter. Jul 25, 2018 energy meters are the basic part to measure the power consumption. It is used everywhere, no matter how big or small consumption it is. Energy is the product of current and voltagein the case of 3 phase supply power factor must be considered.
Climatic conditions test include those limits which influence the performance of the meter externally. A person having a clamp meter or power analyzer can easily check the accuracy whether that person is a lay man or a techy person. The work presented by 3 has developed a prepaid meter billing applic ation. The power companies benefits from eem in three significant ways. Generally, one electronic energy meter consists of hardware and software. Specifically, elements of hardware included the power supply, interface circuit, suitable launch pad with microcontroller. This is used in each and every house and industry for calculating the energy consumed by them. The measurement of energy is accomplished by means of a voltagefrequency converter connected downstream from the power meter. Metering best practices a guide to achieving utility resource efficiency gp sullivan. Finally plan to test the 120v meter on my honda 6500w generator which outputs 30a at 240v on one of the connectors. One meter for the 240v and 2 meters for each side of the 120v. The following is a basic explanation of how bidirectional metering works.
Working the microcontroller at89s52 acts as the primary controller. The energy meter reading is compared with the smart. Tm energy meter types and measurements electromechanical meters limited accuracy manual reading contains moving parts aluminum ring electronic meters mcus, dsps and asics based accurate measurement enhanced security equipped with amr no moving parts electricity meter types single phase common in eu residential meters one voltage and one current measurement. 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.
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