The electricity consumption meter shown in the figure facilitates the billing of energy meter along with load control using wireless gsm technology. Pdf this paper presents a single phase electrical energy meter based on a microcontroller from. The dynamometer wattmeter works on the motor principle. Working principle and construction of q meter video lecture of measurement of capacitance chapter in subject electronic instrumentation. Socket switching actuator fsva230v10a with current measurement. 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. Digital voltmeters working principle of digital voltmeter. Find details of companies offering digital energy meter at best price. The energy is the total power consumed and utilised by the load at a particular interval of time.
Though not actively shown in the circuit diagram, a torroidal current transformer forms the major component. Calculate the number of revolutions made by it, when connected to a load carrying 40 a at 230v and 0. Principles for the evolution of net energy metering and rate design. This explains why electronic voltmeters do not load. An electric meter or energy meter is a device that measures the amount of electrical energy supplied to or produced by a residence, business.
The advantages of highly functional threephase meters for digital energy measurement have been demonstrated in north americas commercial and industrial. Implementation of a singlephase electronic watthour meter. Electronic meters need for prepaid energy meter system. The reading in kwh is obtained by multiply the number of rotations of the disc with the meter.
Electricity meters are typically calibrated in billing units, the most common one being the kilowatt hour. Principle of working of abt meter the energy is recorded in terms of pulses per kwh. Digital voltmeters working principle of digital voltmeter january 2, 2019 march 21, 2016 by electrical4u voltmeter is an electrical measuring instrument used to measure potential difference between two points. How the ad7755 energy meter integrated circuit can be used in threephase. The cpu processes these input signals for finding kva vi, kwh vi cos, rkva vi sin and other parameters.
It is used in domestic and industrial ac circuit for measuring the power. Mar 27, 2016 there are basically 3 types of energy meters. Rs485 bus two way threephase energy meter dsz14wdrs3x5a mid. Jan 02, 2019 digital voltmeters working principle of digital voltmeter january 2, 2019 march 21, 2016 by electrical4u voltmeter is an electrical measuring instrument used to measure potential difference between two points.
A modern digital electronic wattmeterenergy meter samples the voltage. Automatic meter reading and theft control system by using. 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. Download as ppt, pdf, txt or read online from scribd. Fmc5000 series coriolis mass flowmeter here after fmc coriolis meter is designed according to the coriolis force principle. This device is available in a purely electronic form too which is known as digital wattmeter. It is used in domestic and industrial ac circuit for measuring the power consumption. This meter is able to perform current, voltage and. Pdf the energy metering technology used presently in nigeria is not highly reliable and requires.
Digital multimeter working principle electrical a2z. The dual energy meter is a universal dual energy meter. So, electronic type of threephase energy meter is explained below with its working principle. As shown in the block diagram, in a typical digital multimeter the input signal i. Energy meter or watthour meter is an electrical instrument that measures the amount of electrical energy used by the consumers. If a meter is used in combination with a current transformer. Abt meters electrical substation analog to digital converter. The electronic energy meter is also better protected against tampering than its mechanical predecessor, and units for prepaid operation e. Nov 29, 2014 the traditional form of wattmeter is called as dynamometer wattmeter. It has a rotating aluminium wheel called ferriwheel and many toothed wheels. This is a microcontroller based wireless energy meter, as 8051 microcontroller is used for controlling the entire system. Voltmeter working principle if an ammeter is of dc type, then it has polarity signs on it for ensuring appropriate connection for an upscale indication. 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. A list of some manufacturers of electronic voltmeters, ammeters, and oscilloscopes is.
The software can be downloaded for free from the eltako homepage. Digital meters are introduced, as are types of voltmeters and ammeters operating on different techniques of analogto digital signal converters. Working principle and construction of energy meter video lecture of measurement of. What is the solution for the drawbacks of commonly used energy meters. 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. The trend of automation can be incorporated in presently working digital energy meter to make it smarter. 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. Jul 25, 2018 energy meters are the basic part to measure the power consumption. Ammeter definition and working principle electrical academia. Dc electric power i v electric r power unit w aqvit v pvi tt t. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter.
Electronic energy meter is based on digital micro technology dmt and uses no moving parts. Secondly, the orientation problem associated with electromechanical energy meter is completely a nonissue in a digital energy meter. As shown in the above figure, the wattmeter has two sets of coils. Energy meters are the basic part to measure the power consumption. 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. Meanwhile, the problem of the distorted current waveform from loads need to be considered.
Electrical protection and control home automation home security. Principles for the evolution of net energy metering. Implementation of a singlephase electronic watthour meter using msp430afe2xx rev. Before use, please program the sys measurement system configuration and the pt vt and ct ratios through the front panel keys. All multimeters measure ac and dc voltage voltmeter, ac and dc current ammeter, and resistance ohmmeter.
Jul 02, 2018 working principle and construction of q meter video lecture of measurement of capacitance chapter in subject electronic instrumentation and measurement for electrical, electronics, extc. In order to accurately measure the electronic energy used for a electronic energy meter, suitable hardware and software have to be designed. The construction of the single phase energy meter is shown in the figure. A digital multimeter dmm is an instrument that can measure several basic electrical quantities and shows the measurement with a number in a display. Generally, an ebook can be downloaded in five minutes or less.
Digital multimeter working principle analyse a meter. Thirdly, the user friendly display in the digital meters makes energy reading from time to time very easy. Prepaymentprepaid energy meter introduction and working. The basic principles here apply equally to polyphase circuits. A modern digital electronic wattmeter energy meter samples the voltage. The mechanism and working of this instrument are mentioned in this video. Some can also measure other electrical quantities such as frequency or even temperature. Single phase energy meter theory pdf download mastercard. When used in electricity retailing, the utilities record the values measured by these meters to generate an invoice for the electricity. 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. A second terminal block between the current transformer and the meter simplifies service work. The aim of this project is to design a sample meter can accurately display real voltage. 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, and other home appliances. Other settings, such as communication parameters, must also be programmed as needed.
Based on the flow of current, the ferriwheel rotates which makes rotation of other wheels. Since its foundation in 2000 selec has become the market leader for timers, counters and temperature controllers in india. 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. As in the block diagram, the meter has a power supply, a metering engine, a. Electromechanical energy meters have been the standard for metering the electricity since billing began.
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. Handbook on electricity meters asiapacific economic cooperation. Energy meter circuit detailed project with source code. Microcontrollerbased energy metering using the ad7755 analog. When connected to loads, they consume less power and start measuring instantaneous. Suppliers offer variable rate meters operate on the same principle as standard. But these are now being gradually replaced by electronic digital energy meters. What are the advantages and disadvantages of usual energy meters.
Here we discuss the construction and working principle of induction type energy meter. Principle of working of abt meter the cpu central processing units only accepts digital signals. Thus, a customer should always receive the full retail price value for behind the meter choices that reduce gridsupplied energy consumption, whether installing energy efficiency measures, or consuming onsite generation. Implementation of a singlephase electronic watthour. As shown in figures 410a and 410b, the voltage to be measured v x is input to an integrator, charging the capacitor for a fixed time interval t 1, which corresponds to a certain number of clock cycles. Electrical energy meters principles and applications energy management. Vvavb and if vavb, thus the charage dq carry out work the work defined by. Seethalakshmi2 1 school of computing, sastra university, tamil nadu, india 2professor, school of computing, sastra university, tamil nadu, india 1 rakesh.
Majharul islam08 kazi mahmudul hasan11 shahjalal university of science and technology,sylhet3114 dept. Presented here is a simple energy meter using analog devices ade7757 chip for singlephase, 2wire phase and neutral systems used in households. Therefore, the analogue signals are converted to digital by the circuit called adc analogue to digital converter. Abt meters electrical substation analog to digital. Threephase and singlephase energy meters, highquality pdf.
Types of energy meters and their working principles elprocus. Microcontroller based wireless energy meter working. Ammeter definition and working principle electrical. Introducing a bold, new digital ecosystem and an open, global community. Apr 17, 2014 energy meter an electricity meter or energy meter is a device that measures the amount of electric energy consumed by a residance,business or an electrically powered device. Digital energy meters by the millions analog devices. The software supports calculation of various parameters for singlephaseenergy measurement. It is used everywhere, no matter how big or small consumption it is. A multimeter ora multitester, also known as a voltohm meter or vom is, an. Aug 06, 2018 ph meter is a widely used instrument in various laboratories including, chemistry, biochemistry, agriculture etc. A typical multimeter may include features such as the ability to measure. Electronic energy meter industrial applications vishay. Electrical energy meters principles and applications. In particular, conventional current flows into the positive terminal for an upscale meter deflection as shown in above figure.
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. The conventional mechanical energy meter is based on the phenomenon of magnetic induction. Energy meter working principle and construction electronic. The traditional form of wattmeter is called as dynamometer wattmeter. Automatic meter reading and theft control system by using gsm p. 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. Q meter working principle and construction electronic.
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