A simple 3 phase disk type energy meter is present in the diagram below. Pl explain 3 phase energy meter working principle and how can reduce electric cost 1 answers i hope the energy meter will consider only the amount of current flow in case if i improve p. Electromechanical induction type energy meter and its. The first to appear was electromechanical, variously called a disctype, induction or ferraris meter. This type of energy meter is simple in construction and the accuracy is somewhat less due to creeping and other external fields. Principle of operation of a induction kwhr energy meter. Static energy meter is based on stateoftheart electronics technology. Explain the principle and working of induction type energy meter. However, it differs from induction ammeter or voltmeter in so far that separate two coils are used to produced the rotating flux in place of one coil with phase split arrangement.
The watthour meter works on the induction principle. Meanwhile, the problem of the distorted current waveform from loads need to be considered. Energy meter working principle and construction electronic. Due to alternating fluxes there is an induced emf, the emf produced at one. The simple yet reliable structure of single phase electronic energy meters readily supports the dynamic working range of the meter. This meter works on the same principle as the induction. How electronic energy meter works mohans electronics blog. Operating principle of single phase induction type energy meter. The series electromagnet is energized and sets up a magnetic field cutting through the rotating disc, when load current flows through the current coil c. The principle of operation of an induction wattmeter is same as that of induction ammeters and voltmeters i. When the energy meter is connected in the circuit, the current coil carries the load current and the pressure coil carries the current proportional to. What is the solution for the drawbacks of commonly used energy meters. Aa magnet is used to brake the spinning of the disk through foucault induced currents, otherwise, it would speed up out of control.
Aug 02, 2017 electromechanical induction type energy meter. The examples we give in the paper demonstrate the versatility of the principle. Sep 25, 20 the principle behind the working of energy. This meter works on the same principle as the induction motor. Pdf a single phase microcontroller based energy meter.
Let k be the meter constant of energy meter, which is the number of revolution per kwh energy consumption. Accurate energy measurement even in case of phase reversal andor the load is earthed. Driving system moving system breaking system registering system 2. Feb 15, 2014 induction type measuring instrument energy meter 1. Based on the flow of current, the ferriwheel rotates which makes rotation of other wheels.
When the energy meter is connected in the circuit, the current coil carries the load current and the pressure coil carries the current proportional to the supply voltage. Overview hxe34kp three phase four wire prepaid keypad meter is designed for the purpose of prepayment. A foremost problem with these types of energy meters is their proneness to tampering, which necessitates an electrical energy monitoring system. Energy meter is an instrument which measures electrical energy. Induction generators are also called as asynchronous generators. The principle of working and construction of induction type meter is very simple. They are typically calibrated in billing units, the most common one being the kilowatt. The basic principle governing the working of the energy meter is same as that of wattmeter power measuring instruments except that in an energy meter a counting or registering mechanism is used which accounts for time interval over which. The most common type is more properly known as a kilowatthour meter or a joule meter. Jul 25, 2018 the principle of working and construction of induction type meter is very simple and easy to understand thats why these are widely used in measuring energy in domestic as well as industrial world. Before starting to explain how an induction asynchronous generator works, i assume that you know the working principle of an induction motor. An electric meter or energy meter is a device that measures the amount of electrical energy supplied to a residence or business. Single phase electronic energy meter,1 phase electronic. 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.
It is the popularly known and most common type of age old watt hour meter. Give the connections as per the circuit diagram above. The principle of working and construction of induction type meter is very simple and easy to understand thats why these are widely used in measuring energy in domestic as well as industrial world. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic. Note down the reading of two meters in a given period of time, say 2 minutes. Calculate the number of revolutions made by it, when connected to a load carrying 40 a at 230v and 0. Measurement of energy and calibration of single phase energy meter with wattmeter. Hence it is the working of induction type energy meter, adjustment of induction type energy meter. With this technology, up to 90% of the energy consumed is transferred to the food, compared to. If a meter is used in combination with a current transformer. For the meter to read correctly, the speed of the moving system must be proportional to the power in the circuit in which the meter is connected.
It is used in domestic and industrial ac circuit for measuring the power consumption. As the voltage applied is always the system voltage110 or 230 single phase or 220 or 400 3 phase the excitation is same. When connected to measure energy, if disc makes r number of revolution in t seconds. Working of single phase induction type energy meter the basic working of single phase induction type energy meter is only focused on two mechanisms.
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. Electrical energy meters principles and applications. Overview of single phase induction type energy meter. A polyphase 3element 4wire meter is tested at three series test points and two individual element test points, each with 10 repeated runs. There are 2 fundamentally different types of energy meter presently in use. Find details of companies offering digital energy meter at best price. Procedure for calibration and testing of singlephase energy meter. Tables 7 to 14 provide meter test results and uncertainty calculations. But as the current increases the current coil will rotate the aluminium rotor at higher speed so that the kwh reading shown by the counter coupled to the rotor shaft will increase.
What are the advantages and disadvantages of usual energy meters. We know that in induction type energy meters, in order to maintain speed of rotation proportional to power the phase angle between supply voltage and pressure coil flux should be equal to 90 o. Its main functions include energy measurement, data display, communication, prepayment, contactor. Calibration and testing of singlephase energy meter. 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. Mar 28, 2017 the dial of the disk meter shows only kwh usage since the time of energy meter installation. It has a rotating aluminium wheel called ferriwheel and many toothed wheels. Based on the flow of current, the ferriwheel rotates which. Single phase induction type energy meter is also popularly known as watthour meter. The conventional mechanical energy meter is based on the phenomenon of magnetic induction. Nov 19, 2017 induction type energy meter ii electrical technology ii unit 3 duration. An electric meter or energy meter is an essential device that goes with consumption of commercially distributed energy. Induction cooking technology design and assessment micah sweeney, jeff dols, brian fortenbery, and frank sharp electric power research institute epri abstract induction cooking is often considered one of the most efficient cooking technologies.
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 same principle applies to the induction energy meter, except that the movement is not limited by the spring but turns an aluminum disk constantly and racks up a counter mechanism. And reduce the current flow in mains circuit,is it will help to reduce my electricity bill, and. Electric utilities use electric meters installed at customers premises for billing and monitoring purposes. In all induction meters we have two fluxes which are produced by two different alternating currents on a metallic disc. Single phase electronic energy meters which we offer is wellequipped with large integrated circuits along with surface mounted technology. Single phase induction type energy meter consists of four important. In order to accurately measure the electronic energy used for a electronic energy meter, suitable hardware and software have to be designed. For doing this project we use some of the software like embedded c for programming the application software to the microcontroller. Aug, 2006 an electric meter or energy meter is a device that measures the amount of electrical energy supplied to a residence or business. One single phase energy meter, one single phase load, stop watch and connecting wires. It consists of rotating aluminum disc mounted on a spindle between two. Single phase induction type energy meters is very commonly used to. Handbook on electricity meters asiapacific economic cooperation.
However in actual practice, the angle between supply voltage and pressure coil flux is exactly not 90 o but few degrees less. The energy is the total power consumed and utilised by the load at a particular interval of time. The dial of the disk meter shows only kwh usage since the time of energy meter installation. Current rating for 3 phase disk type energy meter is normally up to 100 amps. Explain the principle and working of induction type energy. Unesco eolss sample chapters electrical engineering vol. Energy meter or watthour meter is an electrical instrument that measures the amount of electrical energy used by the consumers.
It has 2 coils called current coil and voltage coil. 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 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. The people working in these boards will go on a particular day and do their duty leaving all their pending works. The energy is the total power consumed and utilised. However, it differs from induction ammeter or voltmeter in so far that separate two coils are used to produced the rotating flux in. 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. Jul, 2016 operating principle of single phase induction type energy meter.
Single phase induction type energy meters electrical concepts. C to the pressure coil circuit by means of phase shifting transformer. Jul 25, 2018 energy meter with lag adjustment devices july 25, 2018 february 24, 2012 by electrical4u we know that in induction type energy meters, in order to maintain speed of rotation proportional to power the phase angle between supply voltage and pressure coil flux should be equal to 90 o. Jul, 2016 the principle of operation of an induction wattmeter is same as that of induction ammeters and voltmeters i. Ii power and energy measurements arnaldo brandolini and alessandro gandelli encyclopedia of life support systems eolss where p, v, i are instantaneous power, voltage, and current, respectively. Due to this, their work will be delayed and this is. Electromechanical induction type energy meter and its working. The operation of induction type energy meter depends on the passage of alternating current through two suitably located coils producing rotating magnetic field which interacts with a metallic disc suspended near to the coils and cause the disc to rotate.
To study the construction and working of single phase energy meter and to find out energy consumed in 30 minutes. The proposed system is based on atmel 89s52 controller which is in our syllabus. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. Power and energy measurements encyclopedia of life. Therefore, this type of meter is also called an integrating meter. Static wattmeters and energy meters glossary bibliography biographical sketches summary this work presents the theoretical and more practical aspects related to electric power and energy measurements, by introducing the methodology to perform such. Energy meter with lag adjustment devices electrical4u. Energy consumed by the electrical loads or appliances can be measured by the induction type 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. The dme d310 t2 type energy meter can integrate additional functions by using the. Therefore, some lag adjustment devices are used for adjustment of lag. Induction type watthour meter electrical engineering. Induction type energy meter ii electrical technology ii unit 3 duration.
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