In conclusion, hardware and software were designed to deal with the problem of the current waveform and accurately display real voltage, current, power. The dynamometer wattmeter works on the motor principle. Pdf the energy metering technology used presently in nigeria is not highly. A multimeter ora multitester, also known as a voltohm meter or vom is, an. Find details of companies offering digital energy meter at best price. Types of energy meters and their working principles. Automatic meter reading and theft control system by using. The file may be stored either in the same directory as the mtr file meter file option or in a f ixed. Here we discuss the construction and working principle of induction type energy meter. The software can be downloaded for free from the eltako homepage. This article is really good kurrey consultancy services november 25, 2018 at 2. A multimeter is a permanent magnet moving coil galvanometer. Aug, 2006 the movement in the energy meter development is moving in the forward direction and has come a long way towards a loss free and a hassle free energy usage across the world.
As shown in the diagram, resistance network comprising a known resistance rk and unknown resistance ru used to develop a voltage across the unknown resistance. Some can also measure other electrical quantities such as frequency or even temperature. The energy is the total power consumed and utilised by the load at a particular interval of time. 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. The mma7660fc is a digital output iic, low power, low profile capacitive micro. Energy measurement accuracy with error in % calibrated at 230 v, 15 a, 50 hz. Nov 29, 2014 the traditional form of wattmeter is called as dynamometer wattmeter. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. Jul 25, 2018 energy meters are the basic part to measure the power consumption. The basic unit of power is watts and it is measured by using a watt meter. The electronic energy meter is also better protected against tampering than its mechanical predecessor, and units for prepaid operation e. In conclusion, hardware and software were designed to deal with the problem of the current waveform and accurately display real voltage, current, power and energy used in one day. Prepaymentprepaid energy meter introduction and working.
Principle wem monitors the energy consumption for a single phase supply. There are several adc available in the market, but we. A digital ohmmeter is used to measure electrical resistance which obstructs the path to the flow of current. The meter is a little bigger than the plate and had to enlarge the hole.
Power consumption is shown by a bar flashing at a rate of 100 times per kwh. 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. Energy meter or watthour meter is an electrical instrument that measures the amount of electrical energy used by the consumers. As shown in the above figure, the wattmeter has two sets of coils. 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.
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. The digital signals are then processed using a dsp or a microcontroller, which then displays the amount of energy consumed on a lcd or a led display. The meter is provided with a field to which entries can be made for this purpose ct or vt factor. Megohmmeter working principle megger working principle. Digital voltmeter is the basic instrument used for measurement of voltage through the use of analog to digital converter.
Multimeter working principle your electrical guide. What is the working principle of energy meter answers. So energy meters measure the rapid voltage and curren. A standard meter is a basic electromechanical induction meter measures electricity consumption in terms of kilowatthours the amount of energy used by a load of one kilowatt over the period of one hour. Electronic meters need for prepaid energy meter system. Some can also measure other electrical quantities such as frequency or even. Abt meters electrical substation analog to digital.
Implementation of a singlephase electronic watthour meter using. Dc electric power i v electric r power unit w aqvit v pvi tt t. Electrodynamometer type wattmeter in general, a watt meter is used to measure the electric power of a circuit, or sometime it also measures the rate of energy transferred from one circuit to another circuit. The voltage and current singles are received from pt and ct respectively. 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 software supports calculation of various parameters for singlephaseenergy measurement. It is often incased in glass and has a disk that rotates that. Accurate metering function iec504703 class b, 1% applicable for twogain.
Implementation of a singlephase electronic watthour. Single phase energy meter theory pdf download mastercard. Finally, the principle of the software is the paced loop. The basic principles here apply equally to polyphase circuits. Vvavb and if vavb, thus the charage dq carry out work the work defined by.
What is the working principle of energy meters measure. A second terminal block between the current transformer and the meter simplifies service work. Induction type energy meter used invariably to measure the energy consumed in any a. If a meter is used in combination with a current transformer. By definition, automatic meter reading system amr is the remote collection of consumption data from customers utility like electric meters using radio frequency, telephony, powerline or. This is also known as energy meter which is used in developing electrical and electronic. A typical multimeter may include features such as the ability to measure. The samples of these signal at a particular instant are collected by sample and hold circuit. Electronic energy meter industrial applications vishay. The electricity consumption meter shown in the figure facilitates the billing of energy meter along with load control using wireless gsm technology. Automatic meter reading and theft control system by using gsm p. The mechanism and working of this instrument are mentioned in this video. So energy meters measure the rapid voltage and currents, calculate their product and give instantaneous power. The three phase energy meter is used for measuring the large power consumption.
It is used everywhere, no matter how big or small consumption it is. The basic principle behind digital multimeters is the analog to digital converter because without this we are not able to convert the analog output into digital form. The working principle of an electronic energy meter is a device that measures the electronic energy consumed usually in kwh. Working on a 240v meter in a box which i will have done soon to test my amateur radio linear amplifier. Apr 17, 2014 types of energy meters standard meters. Analog multimeter working principle electrical academia. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic instrumentation and measurement for electrical, electronics, extc. The traditional form of wattmeter is called as dynamometer wattmeter. 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.
They are typically calibrated in billing units, the most common one being. Design and implementation of wireless energy meter system for. A modern digital electronic wattmeter energy meter samples the voltage. It is used in domestic and industrial ac circuit for measuring the power consumption. 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. Rs485 bus two way threephase energy meter dsz14wdrs3x5a mid. This is a microcontroller based wireless energy meter, as 8051 microcontroller is used for controlling the entire system. Design and implementation of wireless energy meter system. The movement in the energy meter development is moving in the forward direction and has come a long way towards a loss free and a hassle free energy usage across the world. 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.
Socket switching actuator fsva230v10a with current measurement. Microcontroller based wireless energy meter working. The differential pressure sensor attached between the entry and throat section of the venturi meter records the pressure differencep1p2 which becomes an indication of the flow rate of the fluid through the pipe when calibrated the diverging section has been provided to enable the fluid to regain its pressure and hence its kinetic energy. In addition to the types of meter described above which directly measure the amount of energy used, other types of meter are available. Energy meters are the basic part to measure the power consumption. Megger working principle is based on the working principle of movingcoil instruments, which states that when a currentcarrying conductor is placed in a magnetic field, a mechanical force is experienced by it. The principle of working of static abt meter is sampling. 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. Working principle of digital fuel flow meter it is an accumulated meter which requires fuel to displace the components mechanically in the meter for measuring the flow rate.
Energy is the product of current and voltagein the case of 3 phase supply power factor must be considered. What are the advantages and disadvantages of usual 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 electric utilities use electric meters installed at customers premises for billing and monitoring purposes. What is the solution for the drawbacks of commonly. A digital multimeter dmm is an instrument that can measure several basic electrical quantities and shows the measurement with a number in a display. 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. This article is about watthour meter circuit and its working principles. So, electronic type of threephase energy meter is explained below with its working principle. Seethalakshmi2 1 school of computing, sastra university, tamil nadu, india 2professor, school of computing, sastra university, tamil nadu, india 1 rakesh. Digital multimeter working principle electrical a2z. Digital energy meters by the millions analog devices. Utilities are one of the electrical departments, which install these instruments at every place like homes, industries, organizations, commercial buildings to charge for the electricity consumption by loads such as lights, fans, refrigerator.
Aug 06, 2018 ph meter is a widely used instrument in various laboratories including, chemistry, biochemistry, agriculture etc. Venturi flow meter working principle animation when a venturi flow meter is placed in a pipe carrying the fluid whose flow rate is to be measured, a pressure drop occurs between the entrance and throat of the venturi 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. 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.
A density meter, also known as a densimeter, is a device that measures the density. If one uses one kilowatt in onehour duration, one unit of energy gets consumed. 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. This device is available in a purely electronic form too which is known as digital wattmeter. Principle of working of abt meter the energy is recorded in terms of pulses per kwh. Some meters measured only the length of time for which charge flowed, with no measurement of the magnitude of voltage or current. Electrodynamometer type wattmeter construction and working. Electrical energy meters principles and applications. When used in electricity retailing, the utilities record the values measured by these meters to generate an invoice for the electricity.
What is the working principle of digital fuel flow meter. And this coil is free to rotate in the field of a permanent magnet. T he digital household energy meter had been configured as the view er of the. It consists of two elliptical gears meshed together and fluid forces thi. Calculate the number of revolutions made by it, when connected to. An electric meter or energy meter is an essential device that goes with consumption of commercially distributed energy.
Watthour meter is in fact a measuring device which can evaluate and records the electrical power passing through a circuit in a certain time. Calculate the number of revolutions made by it, when connected to a load carrying 40 a at 230v and 0. Megohmmeter definition megger working principle megger working principle megohmmeter circuit diagram the megohmmeter or megger is an instrument for measuring very high resistances, such as the insulation resistance of electrical cables. All multimeters measure ac and dc voltage voltmeter, ac and dc current ammeter, and resistance ohmmeter. Electric utilities use electric meters installed at customers premises for billing and monitoring purposes.
Threephase and singlephase energy meters, highquality pdf. What is the solution for the drawbacks of commonly used energy meters. When measurements are performed with upstream transformers, the displayed energy value must be multiplied by the transformation ratios. Implementation of a singlephase electronic watthour meter using the. In the case of electronic energy meter different transducers are used to calculate i,v and p. There is an iron cored coil pivoted on two jeweled bearings. Meter is installed all electricity units are charged at the same rate 24 hours a day. Handbook on electricity meters asiapacific economic cooperation. I have a 43 watt light bulb connected for the load in the picture which is showing 44 watts. An electric meter or energy meter 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 electromechanical meters ac voltage load indicator voltage coil current coil al dial permanent magnet i. Digital multimeter working principle analyse a meter.
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