Study of active electric energy meters behavior of induction and electronic types. 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 conventional mechanical energy meter is based on the phenomenon of magnetic induction. The pressure coil has the number of turns which makes it more inductive. Moving iron ammeters and voltmeters, dynamometer type watt meters, induction type energy meter. Electronic energy meters are accurate, precise and reliable type of measuring instruments when compared to electromechanical induction type meters. Dc pmmc instruments, extension of range by shunts and multipliers. In these relays, a metallic disc is allowed to rotate between the two electromagnets. Energy meter an energy meter is a device that measures the amount of electrical energy consumed by a residence, business, or an electrically powered device.
The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. Working of single phase induction type energy meter the basic working of single phase induction type energy meter is only focused on two mechanisms. Here you can download the free lecture notes of electrical measurements pdf notes em pdf notes materials with multiple file links. There are several types of energy meters single phase induction type energy meter are very commonly used to measure electrical energy consumed in domestic and commercial installation. Implementation of a singlephase electronic watthour meter using msp430afe2xx rev. Single phase induction type energy meters is very commonly used to. Im is a type of asynchronous ac motor where power is supplied to the rotating device by means of electromagnetic induction. 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 maximum number of products that can be compared is 4. Exceeding 60 year life expectancy from an electronic. In ieee mode, the pf sign is determined by the type of load inductive or capacitive. Measurement of energy and calibration of single phase energy meter with wattmeter. Pdf basic electrical engineering 1st year ebook, notes.
In all induction meters we have two fluxes which are produced by two different alternating currents on. Threephase ctpt operated keypad energy meter 10 shenzhen inhemeter co. These relays work on the principle of the induction motor or an energy 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 the industrial world. If a meter is used in combination with a current transformer. Electrical measurements pdf notes em pdf notes smartzworld. Pdf a detailed study is presented on electric energy meters and its diverse technologies. Principle of generation thermal, hydel and nuclear.
The red wire shows the live or line or phase and the blake shows the neutral wire. It has a rotating aluminium wheel called ferriwheel and many toothed wheels. Meters, double element and three element dynamometer wattmeter, errors and compensations, measurement. A9mem3155 iem3155 energy meter 63 a modbus 1 digital i 1 digital o multitariff. Handbook on electricity meters asiapacific economic cooperation. An induction motor can be defined as the ac electric motor device in which a power source fed by the alternating current with the help of a primary winding. There are four main parts of the operating mechanism of single phase induction type. Implementation of a singlephase electronic watthour. In all induction meters we have two fluxes which are. Induction motor seminar ppt, pdf report study mafia. Energy meter is an integrating instrument which measures the total quantity of electrical energy. This article is only focused about its constructional.
When connected to loads, they consume less power and start measuring instantaneous. Powerlogic pm5100 series power and energy meter schneider. Non linear loads produce harmonics which increases power losses and causes overheating of power system equipment. Procedure for calibration and testing of singlephase energy meter. Therefore, this type of meter is also called an integrating meter. Energy is the product of power and time for which power is used i. Hence it is the working of induction type energy meter, adjustment of induction type energy meter. Im transform electrical energy into mechanical energy. The above drawing shows a simple single phase motor circuit.
The electric energy generated purchased by consumers for different needs. The electrical measurements notes pdf em notes pdf book starts with the topics covering control and damping torques, design considerations type of p. It consists of rotating aluminum disc mounted on a spindle between two electro magnets. Induction type measuring instrument energy meter 1. This application report has the complete metrology source code. 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. It is used in domestic and industrial ac circuit for measuring the power consumption. Driving system moving system breaking system registering system 2. Energy meter working principle and construction electronic instrumentation and measurement duration. Based on the flow of current, the ferriwheel rotates which makes rotation of other wheels. C to the pressure coil circuit by means of phase shifting transformer. 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. These graphics below shows the above idea in a very simple way. Induction type energy meter used invariably to measure the energy consumed in any a.
Induction type measuring instrument energy meter slideshare. Pdf study of active electric energy meters behavior of induction. Electric utilities use electric meters installed at customers premises for billing and monitoring purposes. Overview of single phase induction type energy meter. The induction type relays are also called magnitude relays. The construction varies in details from one product to the next.
One of the major problems in utility power supply is the voltage and current harmonic distortion. The principle of operation of an induction wattmeter is same as that of induction ammeters and voltmeters i. Induction type siqgle phase and three phase energy meter, compensation. The energy is the total power consumed and utilised by the load at a particular interval of time. This app covers entire aspects of the subject, from basic engineering to advanced and modern. The following special messages may appear throughout this manual or on. Single phase induction type energy meter working explained including constructional details. Note down the reading of two meters in a given period of time, say 2 minutes. The active and apparent power consumption in the voltage circuit.
Operating principle of single phase induction type energy meter. Single phase induction type energy meters electrical. Single phase induction type meters the construction and principle of operation of single phase energy explained below. 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.
Electrical energy is measured in kilo watthours kwh by this energy meter. Calibration and testing of singlephase energy meter. What is the solution for the drawbacks of commonly used energy meters. Induction type siqgle phase and three phase energy meter, compensation, creep, error, testing, frequency meters. Energy meter is an integrating instrument which measures the total quantity of electrical energy supplied to the circuit in given period.
It is the popularly known and most common type of age old watt hour meter. In analog voltmeters, the pointer moves over a calibrated scale in proportion to potential difference across the points where as in case of digital voltmeters, it displays numerical values with the help of. The coils of the electromagnets are energised with the help of alternating currents. Electrical energy meters principles and applications.
The construction of the single phase energy meter is shown in the figure below. Threephase ctpt operated keypad energy meter operation. Electrodynamometer type, induction type, single phase and three phase wattmeter, compensation, energymeters. Study of single phase induction type energy meter or watt. 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. In all induction meters, we have two fluxes which are produced by two different alternating currents on a metallic disc. Some of the common errors in energy meter and their remedial measures are discussed below. Induction type energy meter ii electrical technology ii unit 3 s. Energy meter with lag adjustment devices electrical4u. The simplest such instrument is single phase induction type energy meter. Thus we need an integrating instrument which can measure and record the energy consumed by the load under varying load condition. Energy meter multiple choice questions mcq and answers.
However, it differs from induction ammeter or voltmeter in so far that separate two coils are used to produced the. Dinrail energy meters for singlephase circuits up to 63a. There are four main parts of the operating mechanism. We know that in induction type energy meters, in order to maintain speed of rotation proportional to power the phase angle between supply voltage. A induction machine can be used as either a induction generator or a induction motor. 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.
Generally, it is known as the asynchronous motor because its running speed is less than its synchronous speed. Speed of rotation of disc is proportional to the power and this power is integrated by the use of counter. Electrical car charging electrical protection and control emergency lighting home automation. Single phase induction type energy meter is also popularly known as watthour meter. The main alterations are the provision of only one pressure coil upon the. In this page you can learn various important energy meter multiple choice questions answers,mcq on energy meter with answers,mcq on energy meter,sloved energy meter objective questions answers, energy meter multiple choice questions answers etc. Vibrating reed type, electrical resonance type moduleii 10 hours. Free download induction motor seminar ppt, pdf report. Construction driving system, moving system, braking syatem, and registering system 4. Technical specifications for single phase electronic energy meter of. This will be converted into corresponding measurements in the display section. So, electronic type of threephase energy meter is explained below with its working principle. 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.