Single phase induction type energy meter slideshare. Here we are going to discuss about the single phase induction type in. The measurement of energy is accomplished by means of a voltagefrequency converter connected downstream from the power meter. Use of instrument transformers for extension of instrument range.
A single phase energy meter with capacitive power supply and shunts, rev. Three phase ctpt operated keypad energy meter 10 shenzhen inhemeter co. Dinrail energy meters for single phase circuits up to 63a. The principle of operation of an induction wattmeter is same as that of induction ammeters and voltmeters i. In addition to metering based on the amount of energy used, other types of. The meter complies with national and international metering standards. The red wire shows the live or line or phase and the blake shows the neutral wire. This electronic meter does not possess any rotating parts, and the. Its small profile, high accuracy and market certification. Here we are going to discuss about the single phase induction type in detail.
The meter has been granted eec model approval certificate by. Working of single phase induction type energy meter the basic working of single phase induction type energy meter is only focused on two mechanisms. Which is known as the general expression for the deflecting torque in the induction type meters. Single phase energy meters single phase energy meter. Electrical energy meters principles and applications. Pic18f87j72 singlephase energy meter calibration users guide. Energy meter multiple choice questions mcq and answers. Arrangement of counting and displaying the amount of energy consumed. The induction type energy meter have high accuracy. The more important of these are described briefly below, together with some compensations which are frequently incorporated in meters. 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. The three phase meter is constructed by connecting the two single phase meter through the shaft.
Working of single phase induction type energy meter. Procedure for calibration and testing of single phase energy meter. The construction and principle of operation of single phase energy meters is explained below. Figure 3 shows a simple capacitor power supply for a single output voltage of 3. Single phase electronic energy meters which we offer is wellequipped with large integrated circuits along with surface mounted technology. Study of single phase induction type energy meter or watt. The main alterations are the provision of only one pressure coil upon the central limb of the shunt magnet and only one copper shading band upon this limb. Single phase electromechanical induction energy meter. Understanding the basic theory of shieldedpole shunt magnet. 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. In electrodynamometer type power factor meter there are further two types on the basis of supply voltage. It is a wellknown and most common type of ageold energy meter. Therefore, this type of meter is also called anintegrating meter. The most common type of electricity meter is the electromechanical watthour meter.
Energy meters are the basic part to measure the power consumption. Working of single phase energy meter induction type. There are four main parts of the operating mechanism of single phase induction type. The setting may be different in other type of kwh or energy meter in different locations. 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. Threephase ctpt operated keypad energy meter operation. The main alterations are the provision of only one pressure coil upon the. The total energy is the sum of the reading of both the elements. The working of single phase induction type energy meters are based on two main fundamentals. A wide variety of single phase energy meter options are available to you, such as phase, display type. Once the mercury pool was exhausted, the meter became an open circuit. Single phase type three phase type induction meters. An4164, a singlephase energy meter with capacitive power.
Note down the reading of two meters in a given period of time, say 2 minutes. This paper presents a single phase electrical energy meter based on a microcontroller from microchip technology inc. Dds102j1 single phase electronic energy meter register display ddsy102k3 single phase electronic type prepayment energy meter ddsy102k7 single phase electronic type microwireless energy meter. Single phase energy meter become a certified partner description the sdm120 is an advanced single phase energy meter that solves a wide range of submetering and monitoring scenarios where switchboard space is at a premium. Single phase induction type energy meter working explained including constructional details. Refer to the next sections for the shunt sensor and ct sensor connection to the channels of the adc. Calibration and testing of singlephase energy meter. The meter which is used for measuring the power of three phase supply is known as the three phase energy meter. Jul, 2016 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. An induction motors rotor can be either wound type or squirrelcage type. The basic working of single phase induction type energy meter is only focused on two mechanisms. Single phase induction type energy meter construction the construction of this meter is more or less similar to induction type watt meter. Single phase induction meters are very popular for domestic and industrial use because of its wide application as energy meter.
Induction type watt hour meter or energy meter about circuit. We do not provide any control spring and pointer in an energy meter. C to the pressure coil circuit by means of phase shifting transformer. Mechanism of rotation of an aluminum disc which is made to rotate at a speed proportional to the power. The mcp3909pic18f85j90 single phase energy meter reference design is a fully functional single phase meter. How to wire energy meter energy meter installation step by step kwh meter installation at home.
Technical specifications for single phase static meter the equipment covered by these broad specifications shall conform to the requirements stated in latest editions of relevant indian iec standards and regulations. Therefore, this type of meter is also called an integrating meter. May 15, 2018 now there are two types of power factor meterselectrodynamometer type. Mcp3909 and pic18fj90 single phase energy meter reference design.
Single phase energy meter all you need to know toppr. The rotation speed of the disc is proportional to the power, and this power is integrated by the use of gear trains and counter mechanism. It comprises a rotating aluminum disc placed on a spindle between two electromagnets. This is used in each and every house and industry for calculating the energy consumed by them. 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 series electromagnet is energized by a coil, known. About 79% of these are energy meters, 2% are power meters.
There are four main parts of the operating mechanism i driving system ii moving system iii braking system. Give the connections as per the circuit diagram above. Now there are two types of induction meters and they are written as follows. Mechanism of counting and displaying the amount of energy transferred. Single phase induction type energy meters electrical concepts. Single phase energy meter single phase induction type energy meter is also popularly known as watthour meter. Explain basic principle and development of torque expressions for energy meter. A shuntbased circuit is used for the phase current sensing and a ctbased circuit is used for the neutral current. Power factor meters electrodynamometer type power factor meter. The meter is designed to offer reliable energy measurement in single phase circuit and is highly suitable for metering and remote communication purposes. It comes with suitable display with a range of communication options for local and remote monitoring.
When the energy meter is connected in the circuit, the current coil carries the load. Here we discuss the construction and working principle of induction type energy meter. It is used in domestic and industrial ac circuit for measuring the power consumption. 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. The most common type of electricity meter is still the electromechanical induction watt. There are two basic reasons for the use of single phase motors rather than 3 phase motors. This design implements a highaccuracy single phase embedded energy measurement application using msp430afe253. A single phase meter is used in alternating current systems. Single phase meter wiring diagram energy meter single. Apr, 2012 single phase induction type energy meter 1. Single phase induction type energy meter is also popularly known as watthour meter. Single phase watthour meters of cmax type are induction meters meant for electric energy measuring on single phase 2 wire or 3 wire networks. These may be single or three phase meters depending on the supply utilized by domestic or commercial installations. Construction driving system, moving system, braking syatem, and registering system 4.
It is used everywhere, no matter how big or small consumption it is. The principle of working and construction of induction type meter is very simple. Induction meter includes types such as induction voltmeters, induction ammeters and induction watthour meters. The energy is the total power consumed and utilised by the load at a particular interval of time. Single phase energy meters single phase energy meter with. Their construction and operation comply with the technical requirements provided by iec 6205311, en 504702, din 43857 and iec 60145 standards. Some of the common errors in energy meter and their remedial measures are discussed below.
The simplest such instrument is single phase induction type energy meter. Electrical energy is measured in kilo watthours kwh by this energy meter. Overview of single phase induction type energy meter. 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. This makes these cooktops much more energy efficient compared to its gas and electric counterparts. Bidirectional energy measurement for import and export enables solar pv energy metering.
Drm121, mqxenabled mcf51em256 singlephase electricity meter. Pdf a single phase microcontroller based energy meter. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. Implementation of a singlephase electronic watthour. A8 electromechanical watthour meters made by pafal. Thus we need an integrating instrument which can measure and record the energy consumed by the load under varying load condition. The software supports calculation of various parameters for single phaseenergy measurement. Single phase energy meter description the sdm220 is an advanced digital single phase multifunction energy meter, which measures up to 100a direct load. It suits a wide range of direct connect submetering and remote monitoring scenarios with onscreen setup for easy installation.
Single phase induction type energy meters are extensively used for the measurement of electrical energy in single phase a. Implementation of a singlephase electronic watthour meter. What is the solution for the drawbacks of commonly used energy meters. Below are the the connections diagrams for installation of a single phase 3 phase, 4 wire kwh meter digital or analog energy meter from the supply to the main distribution board in home. Ecostruxure for your business ecostruxure lets you thrive in todays digital world.
For reason of economy, most houses, offices and also rural areas are supplied with single phase a. The individual pulses are then summated through the use of an electromechanical meter, and are made available at a pulse output as well. Particularly in this article, we are going to study about the working principles of single phase electromechanical induction type energy meter and also about three phase electronic energy meter from the explanation of two basic energy meters as described below. An energy meter is used to measure the energy consumed in the kilowatt hours. 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. Induction type measuring instrument energy meter 1. Single phase induction motors are used extensively for smaller loads, such as household appliances like fans. Single phase induction type energy meter errors points. The copper shading bands are also called the power factor compensator or compensating loop. Mechanism of rotation of an aluminum disc which is. On a singlephase ac supply, the electromechanical induction meter.
Induction type energy meter essentially consists of following components. Our product range includes a wide range of single phase energy meter with multifunctional lcd, single phase energy meter with rs 485 communications, single phase ac static watt hour meter, single phase multifunction electronic energy meter with lcd, single phase static energy meter with counter display and power meter. A 3 phase energy meter has same elements as in case of a single phase energy meter. Constructionally an induction type single phase watt hour meter has many similarities to an induction type wattmeter.
Single phase watthour meters comply with the technical requirements provided by iec 6205311 and en 504702 standards. The single phase induction type energy meter utilises the fundamental principle of electromagnetic induction. Driving system moving system breaking system registering system 2. Relays amr solutions fault passage indicator fpi amr solutions. Three phase onerate electric meters are meant for measuring active or reactive electric energy consumption on 3 or 4 wire three phase networks. In all induction meters we have two fluxes which are produced by two different alternating currents on.
North eastern electricity supply company of odisha limited. 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. Single and three phase wattmeters and energy meters. Energy meter is an instrument which measures electrical energy. This evm has builtin support for measuring ac voltage, current, active power, reactive power, apparent power, frequency, power factor, dc voltage, dc current, and dc active power. Single phase induction type energy meters electrical.
Three phase squirrelcage induction motors are widely used as industrial drives because they are selfstarting, reliable and economical. This article is only focused about its constructional features and its working. There are two types of induction meters and they are written as follows. Name of materials unit quantity cost of tender paper rs emd rs single phase energy meter of 1060 amp. Single phase energy meter working of single phase induction. Detailed information and tools for energy meter interfaces can be downloaded from the gossen metrawatt homepage, under the section. Induction type measuring instrument energy meter slideshare. 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. Induction type energy meter used invariably to measure the energy consumed in any a. 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. An electricity meter, electric meter, electrical meter, or energy meter is a device that measures. The construction of the single phase energy meter is shown in the figure below.
Energy meter errors in addition to errors due to incorrect settings of the main adjustments, there are errors in meter registrations due to other causes. A single phase induction type energy meter consists of driving system, moving system, braking system and registering system. 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. But for larger loads, step down current transformers must be placed to isolate energy meters from higher currents. Single phase electronic energy meter,1 phase electronic. Moreover, the working principle of a watthour meter is more or less similar to that of an induction type wattmeter. What are the advantages and disadvantages of usual energy meters. For small service measurements like domestic customers, these can be directly connected between line and load. Jun 08, 2016 thus we need an integrating instrument which can measure and record the energy consumed by the load under varying load condition.
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