It is just like the basic principle of dc generator. The conventional mechanical energy meter is based on the phenomenon of magnetic induction. These transformers are used for lowering long distance electrical signals into power levels, which are utilized by lightcommercial, as well as residential. This meter is able to perform current, voltage and power measurements in three phase supply systems. Therefore, this type of meter is also called an integrating meter. It also depends upon faradays law of electromagnetic induction which says the current is induced in the conductor inside a magnetic field when there is a relative motion between that conductor and the magnetic field. The three phase energy meter has two discs mounted on the common shaft. Jul 03, 2017 the single phase power transformer is a device, which uses a single phase ac current.
The construction of the single phase energy meter is shown in the figure below. Smart card, which is the switch, gives information about the limitation of units. The aluminium disc is supported by a spindle which has a worm gear which drives the register. Energy meters are the basic part to measure the power consumption. 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. Electronic single phase watthour meter adopts largescale ic, the latest microelectronic technologies and smt techniques. The three phase meter is constructed by connecting the two single phase meter through the shaft. Mar 28, 2017 induction type single phase energy meter. The simplest such instrument is single phase induction type energy meter. The type of meter described above is used on a singlephase ac supply.
The torque of both the elements is added mechanically, and the total rotation of the shaft is proportional to the three phase energy consumption. The total energy is the sum of the reading of both the elements. There are four main parts of the operating mechanism of single phase induction type. In this project we make a smart electricity energy meter using arduino and esp8266 wifi module which can not only sends you a smsemail of your electricity bill but also you can monitor the energy uses anytime and from anywhere in the world.
And also the correct operation of measuring instruments like 3 phase energy meter and automatic control of devices also. 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. Basic operation these instruments are giving accurate reading when supply. Induction type energy meter used invariably to measure the energy consumed in any a. Calculate the number of revolutions made by it, when connected to a load carrying 40 a at 230v and 0. Phase sequence meter is used for detecting the sequence of the supply in threephase electric circuits. Types of single phase induction motors electronics hub. A 3phase energy meter has same elements as in case of a singlephase energy meter. Note down the reading of two meters in a given period of time, say 2 minutes. Single phase motors are very widely used in home, offices, workshops etc. Induction generators are also called as asynchronous generators. Mechanism of rotation of an aluminum disc which is. Feb 15, 2019 single phase induction type energy meter.
Electrical energy meters principles and applications. Study of single phase induction type energy meter or watt. The three phase energy meter is used for measuring the large power consumption. An induction type single phase energy meter, as show in fig has. Here we discuss the construction and working principle of induction type energy meter. Particularly in this article, we are going to study about the working principles of singlephase electromechanical induction type energy meter and also about. The measurement of energy is accomplished by means of a voltagefrequency converter connected downstream from the power meter. A simple capacitive power supply for the msp430 energy meter appropriate values of resistor r22 and capacitor c49 are chosen based on the required output current drive of the. Mechanism of rotation of an aluminum disc which is made to rotate at a speed proportional to the power. This will be converted into corresponding measurements in the display section.
The principle of working and construction of induction type meter is very simple and easy to understand thats why these are widely used in. Figure 3 shows a simple capacitor power supply for a single output voltage of 3. Mechanism of counting and displaying the amount of energy transferred. Thus we need an integrating instrument which can measure and record the energy consumed by the load under varying load condition. Procedure for calibration and testing of single phase energy meter.
Working of single phase induction type energy meter. Calibration and testing of singlephase energy meter. Single phase induction type energy meter is also popularly known as. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. In the induction type single phase energy meter, the flux produced by shunt magnet pressure or. Below are the the connections diagrams for installation of a singlephase 3phase, 4 wire kwh meter digital or analog energy meter from the supply to the main distribution board in home. Understanding working principle of a single phase transformer. At last of every month, many of us get worried about the high electricity bill and we have to look at the energy meter once in a while. Design and implementation of wireless energy meter system. Procedure for calibration and testing of singlephase energy meter. Previously we have built a energy meter circuit which sends you sms about the bill using gsm module.
The energy is the total power consumed and utilised by the load at a particular interval of time. What is the solution for the drawbacks of commonly used energy meters energy meter an energy meter is a device that. Single phase energy meter working of single phase induction. Give the connections as per the circuit diagram above. These graphics below shows the above idea in a very simple way. A digital multimeter much like an analog meter, it is able to read voltage, current, and resistance. Principle wem monitors the energy consumption for a single phase supply. 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. What is the solution for the drawbacks of commonly used energy meters. Energy meter working principle and construction electronic instrumentation and measurement duration. An induction watthour meter is essentially an induction wattmeter with control spring and pointer removed but brake magnet and counting mechanism provided.
What are the advantages and disadvantages of usual energy meters. When the three phase power factor meter is connected in the circuit, under balanced load conditions, the angle through which the pointer is deflected from the unity power factor position is equal to the phase angle of the circuit, because the. Type of usage like domestic, commercial and industrial. Technical like single phase, lt, three phases, ht and many more. Ip65 durable waterproof single phase electrical energy. What is the working principle of a power factor meter.
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. Single phase induction type energy meter consists of four important. Here we are building an iot based project of energy meter. A singlephase meter is used in alternating current systems.
Threephase ctpt operated keypad energy meter operation. Threephase ctpt operated keypad energy meter 10 shenzhen inhemeter co. The register is a series of dials which record the amount of energy used. 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 meter which is used for measuring the power of three phase supply is known as the three phase energy meter. Jul, 2016 operating principle of single phase induction type energy meter. The individual pulses are then summated through the use of an electromechanical meter, and are made available at a pulse output as well.
A digital multimeter dmm is a multifunctional meter that displays its electrical quantitative values on an lcd screen. Working the microcontroller at89s52 acts as the primary controller. Prepaymentprepaid energy meter introduction and working. Single phase energy meter on sales quality single phase. Overview of single phase induction type energy meter. The red wire shows the live or line or phase and the blake shows the neutral wire. 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. On a single phase ac supply, the electromechanical induction meter operates through electromagnetic induction by counting the revolutions of a nonmagnetic, but electrically conductive, metal disc which is made to rotate at a speed proportional to the power. C to the pressure coil circuit by means of phase shifting transformer. The working principle of an alternator is very simple. 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.
The principle of working and construction of induction type meter is very simple. Jun 08, 2019 the working principle of an alternator is very simple. Basic principle and development of torque expressions for energy meter. 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.
Single phase energy meter all you need to know toppr. Implementation of a singlephase electronic watthour. The primary controller collects information from energy meter as well as from the smart card. Aug 10, 2010 the type of meter described above is used on a single phase ac supply. What is the working principle of three phase energy meter. An induction type single phase energy meter, as show in fig has following main parts of the operating mechanism. Single phase induction motors are used in a wide range of applications where only single phase supply is available. These are manufactured in fractional kilowatt range to meet the requirements of various applications such as ceiling fans, food mixers, refrigerators, vacuum cleaners, portable drills, hair driers, etc. Introduction to working principle of single phase transformer. 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 working of single phase induction type energy meters are based on two main fundamentals. It is used everywhere, no matter how big or small consumption it is. Therefore, this type of meter is also called anintegrating meter.
A 3 phase energy meter has same elements as in case of a single phase energy meter. The most common type of electricity meter is the electromechanical watthour meter. Single phase induction motor split phase, capacitor and. Digital multimeter working principle electrical academia. Many singlephase transformers allow adjustable turn ratios, however, others have fixed 1. When the three phase power factor meter is connected in the circuit, under balanced load conditions, the angle through which the pointer is deflected from the unity power factor position is equal to the phase angle of the circuit, because the two moving coils are fixed 120 apart. So, electronic type of threephase energy meter is explained below with its working principle. This is used in each and every house and industry for calculating the energy consumed by them. Just like a dc machine, a same induction machine can be used as an induction motor as well as an induction generator, without any internal modifications. This article is really good kurrey consultancy services november 25, 2018 at 2. Operating principle of single phase induction type energy meter. The electronic energy meter is also better protected against tampering than its mechanical predecessor, and units for prepaid operation e. Since the direction of rotation of three phase electric motors can be changed by changing the phase sequence of supply. Single phase induction motor split phase, capacitor and shaded pole etc.
Understanding the basic theory of shieldedpole shunt magnet. 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 basic principle of induction type energy meter is electromagnetic induction. This meter is able to perform current, voltage and. Design and implementation of wireless energy meter system for. Based on the flow of current, the ferriwheel rotates which makes rotation of other wheels. The power factor meter is also called the phase meter.
Theory and operation phasor diagram of single phase induction type energy. In the induction type single phase energy meter, the flux produced by shunt field is. Mar 02, 2017 single phase meter wiring diagram energy meter. An energy meter is used to measure the energy consumed in the kilowatt hours. Single phase induction type energy meters electrical concepts. So, electronic type of three phase energy meter is explained below with its working principle. A second terminal block between the current transformer and the meter simplifies service work. And reduce the current flow in mains circuit,is it will help to reduce my electricity bill, and. It is used in domestic and industrial ac circuit for measuring the power consumption.
Jul 25, 2018 energy meters are the basic part to measure the power consumption. When connected to loads, they consume less power and start measuring instantaneous. This means the transformer depends on a voltage cycle, which operates in an integrated time phase. Highest voltage in singlephase transformers vary as per the industrial regulations and utility infrastructure. Dec 19, 2015 single phase induction motors are used in a wide range of applications where only single phase supply is available. The basic working of single phase induction type energy meter is only focused on two mechanisms. In addition to this, single phase motors are reliable, cheap in cost, simple in construction and easy to repair. Before starting to explain how an induction asynchronous generator works, i assume that you know the working principle of an induction motor. According to the measuring mechanism, it can be divided into three categories.
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