Introduction to working principle of single phase transformer. What is the working principle of a power factor 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. So, electronic type of threephase energy meter is explained below with its working principle. Electronic single phase watthour meter adopts largescale ic, the latest microelectronic technologies and smt techniques. Mechanism of rotation of an aluminum disc which is. This is used in each and every house and industry for calculating the energy consumed by them. Basic principle and development of torque expressions for energy meter. Prepaymentprepaid energy meter introduction and working. The primary controller collects information from energy meter as well as from the smart card. Mar 02, 2017 single phase meter wiring diagram energy meter. Ip65 durable waterproof single phase electrical energy. The meter which is used for measuring the power of three phase supply is known as the three phase energy meter.
According to the measuring mechanism, it can be divided into three categories. Type of usage like domestic, commercial and industrial. A 3phase energy meter has same elements as in case of a singlephase energy meter. In addition to this, single phase motors are reliable, cheap in cost, simple in construction and easy to repair. 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. Previously we have built a energy meter circuit which sends you sms about the bill using gsm module. So, electronic type of three phase energy meter is explained below with its working principle. This will be converted into corresponding measurements in the display section. The type of meter described above is used on a singlephase ac supply. Procedure for calibration and testing of singlephase energy meter. This article is really good kurrey consultancy services november 25, 2018 at 2. The most common type of electricity meter is the electromechanical watthour meter. Implementation of a singlephase electronic watthour. They are typically calibrated in billing units, the most common one being the kilowatt.
The electronic energy meter is also better protected against tampering than its mechanical predecessor, and units for prepaid operation e. Mar 28, 2017 induction type single phase energy meter. A digital multimeter much like an analog meter, it is able to read voltage, current, and resistance. Since the direction of rotation of three phase electric motors can be changed by changing the phase sequence of supply. These transformers are used for lowering long distance electrical signals into power levels, which are utilized by lightcommercial, as well as residential. An induction watthour meter is essentially an induction wattmeter with control spring and pointer removed but brake magnet and counting mechanism provided. This means the transformer depends on a voltage cycle, which operates in an integrated time phase. An induction type single phase energy meter, as show in fig has following main parts of the operating mechanism. 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.
Feb 15, 2019 single phase induction type energy meter. Single phase energy meter working of single phase induction. Here we are building an iot based project of energy meter. The power factor meter is also called the phase meter. Theory and operation phasor diagram of single phase induction type energy. The working principle of an alternator is very simple.
It is used in domestic and industrial ac circuit for measuring the power consumption. 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. The register is a series of dials which record the amount of energy used. Aug 10, 2010 the type of meter described above is used on a single phase ac supply. Understanding the basic theory of shieldedpole shunt magnet. 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. Electronic meters need for prepaid energy meter system. 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. Single phase induction motor split phase, capacitor and. 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. Implementation of a singlephase electronic watthour meter. Smart card, which is the switch, gives information about the limitation of units. The total energy is the sum of the reading of both the elements. The three phase meter is constructed by connecting the two single phase meter through the shaft.
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. Single phase induction type energy meter is also popularly known as. The energy meter reading is compared with the smart. Single phase energy meter on sales quality single phase. Single phase energy meter all you need to know toppr. Induction generators are also called as asynchronous generators. Single phase induction type energy meter is also popularly known as watthour meter. The basic principle of induction type energy meter is electromagnetic induction. When measurements are performed with upstream transformers, the displayed energy value must be multiplied by the transformation. C to the pressure coil circuit by means of phase shifting transformer. Design and implementation of wireless energy meter system for.
Energy meters are the basic part to measure the power consumption. When connected to loads, they consume less power and start measuring instantaneous. Give the connections as per the circuit diagram above. The construction of the single phase energy meter is shown in the figure below. The individual pulses are then summated through the use of an electromechanical meter, and are made available at a pulse output as well. Threephase ctpt operated keypad energy meter operation. What are the advantages and disadvantages of usual energy meters.
This meter is able to perform current, voltage and power measurements in three phase supply systems. In the induction type single phase energy meter, the flux produced by shunt field is. Technical like single phase, lt, three phases, ht and many more. It is just like the basic principle of dc generator. What is the solution for the drawbacks of commonly used energy meters. The principle of working and construction of induction type meter is very simple. 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. Iot based electricity energy meter using esp12 and arduino. There are four main parts of the operating mechanism of single phase induction type. Single phase induction motors are used in a wide range of applications where only single phase supply is available. Here we discuss the construction and working principle of induction type energy meter. The red wire shows the live or line or phase and the blake shows the neutral wire. Principle wem monitors the energy consumption for a single phase supply. This meter is able to perform current, voltage and.
Thus we need an integrating instrument which can measure and record the energy consumed by the load under varying load condition. Threephase ctpt operated keypad energy meter 10 shenzhen inhemeter co. Digital multimeter working principle electrical academia. The torque of both the elements is added mechanically, and the total rotation of the shaft is proportional to the three phase energy consumption. Mechanism of rotation of an aluminum disc which is made to rotate at a speed proportional to the power. Jul 25, 2018 energy meters are the basic part to measure the power consumption. A digital multimeter dmm is a multifunctional meter that displays its electrical quantitative values on an lcd screen. 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. Phase sequence meter is used for detecting the sequence of the supply in threephase electric circuits. A second terminal block between the current transformer and the meter simplifies service work. These graphics below shows the above idea in a very simple way. Energy meter working principle and construction electronic instrumentation and measurement duration. The measurement of energy is accomplished by means of a voltagefrequency converter connected downstream from the power meter. Different phase configurations use additional voltage and current coils.
An induction type single phase energy meter, as show in fig has. 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. Highest voltage in singlephase transformers vary as per the industrial regulations and utility infrastructure. And also the correct operation of measuring instruments like 3 phase energy meter and automatic control of devices also. The simplest such instrument is single phase induction type energy meter. The aluminium disc is supported by a spindle which has a worm gear which drives the register.
A single phase meter is used in alternating current systems. Calibration and testing of singlephase energy meter. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic instrumentation and measurement for electrical, electronics, extc. Electrical energy meters principles and applications. Design and implementation of wireless energy meter system. The three phase energy meter is used for measuring the large power consumption. Basic operation these instruments are giving accurate reading when supply. A singlephase meter is used in alternating current systems. Jul 03, 2017 the single phase power transformer is a device, which uses a single phase ac current. Understanding working principle of a single phase transformer. Overview of single phase induction type energy 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 three phase energy meter has two discs mounted on the common shaft.
An energy meter is used to measure the energy consumed in the kilowatt hours. 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. Working the microcontroller at89s52 acts as the primary controller. The principle of working and construction of induction type meter is very simple and easy to understand thats why these are widely used in. 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. Particularly in this article, we are going to study about the working principles of singlephase electromechanical induction type energy meter and also about.
Jun 08, 2019 the working principle of an alternator is very simple. The conventional mechanical energy meter is based on the phenomenon of magnetic induction. Single phase induction type energy meter consists of four important. Working of single phase induction type energy meter. Note down the reading of two meters in a given period of time, say 2 minutes. 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. Mechanism of counting and displaying the amount of energy transferred.
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. 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 used energy meters energy meter an energy meter is a device that. The energy is the total power consumed and utilised by the load at a particular interval of time. Operating principle of single phase induction type energy meter. Single phase motors are very widely used in home, offices, workshops etc. Based on the flow of current, the ferriwheel rotates which makes rotation of other wheels. 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. And reduce the current flow in mains circuit,is it will help to reduce my electricity bill, and. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. What is the working principle of three phase energy meter. But what if we can monitor our electricity uses from anywhere in the world and get an smsemail when your energy consumption reaches to a threshold value. Therefore, this type of meter is also called anintegrating meter. Dec 19, 2015 single phase induction motors are used in a wide range of applications where only single phase supply is available.
Figure 3 shows a simple capacitor power supply for a single output voltage of 3. Calculate the number of revolutions made by it, when connected to a load carrying 40 a at 230v and 0. Study of single phase induction type energy meter or watt. A 3 phase energy meter has same elements as in case of a single phase energy meter. It is used everywhere, no matter how big or small consumption it is.
In the induction type single phase energy meter, the flux produced by shunt magnet pressure or. Therefore, this type of meter is also called an integrating meter. 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. Jul, 2016 operating principle of single phase induction type energy meter. The working of single phase induction type energy meters are based on two main fundamentals. The basic working of single phase induction type energy meter is only focused on two mechanisms. Before starting to explain how an induction asynchronous generator works, i assume that you know the working principle of an induction motor. Induction type energy meter used invariably to measure the energy consumed in any a. Single phase induction type energy meters electrical concepts.