Three phase energy meter three phase modular smart energy meter. One of the types of threephase energy meters is shown below given as an example that ensures reliable and accurate energy measurement compared to the electromechanical meters. 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. However the meter should withstand the maximum system voltage. Three phase ctpt operated keypad energy meter 10 shenzhen inhemeter co. The meter which is used for measuring the power of three phase supply is known as the three phase energy meter. Jul 25, 2018 energy meters are the basic part to measure the power consumption. Mar 28, 2017 induction type single phase energy meter. In all induction meters we have two fluxes which are produced by two different alternating currents on a metallic disc. And for energy in three phase systems the following. Pdf a prototype design for three phase smart energy meter.
Mcp3909 3phase energy meter reference design using. 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. Driving system moving system breaking system registering system 2. Three phase four wire, whole current meter, direct reading type. 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. The principle of working and construction of induction type meter is very simple. Voltage coil produces magnetic flux proportional to voltage and current coil produces magnetic flux proportional to current.
The energy is the total power consumed and utilised by the load at a particular interval of time. Handbook on electricity meters asiapacific economic cooperation. Single phase induction type energy meters electrical. The basic working of single phase induction type energy meter is only focused on two mechanisms. 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. The basic principle of induction type energy meter is electromagnetic induction. Single phase energy meter single phase induction type energy meter is also popularly known as watthour 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 electric utilities use electric meters installed at customers premises for billing and monitoring purposes.
The meter and push fit type meter box shall be supplied in suitable packing so as to withstand transit shocks during road transport. Given below is the picture of single phase induction type meter. Their construction and operation comply with the technical requirements provided by en 504702, en 504701. Understanding the basic theory of shieldedpole shunt magnet. Electrical energy meters principles and applications. If this works ok, plan to build another box with 3 meters in it. It is a maintenancefree, less noisy and efficient motor. The most popular type is the 3 phase, squirrelcage ac induction motor. Here we discuss the construction and working principle of induction type energy meter. Study of single phase induction type energy meter or watt.
Induction type energy meter essentially consists of following components. A wide variety of three phase 4 wire energy meter options are available to you, such as single phase, three phase. Record all nameplate information for the induction motor. C to the pressure coil circuit by means of phase shifting transformer. Induction type energy meter used invariably to measure the energy consumed in any a. Working of single phase induction type energy meter the basic working of single phase induction type energy meter is only focused on two mechanisms. This article is only focused about its constructional features and its working. Driving system consists of two electromagnets on which pressure coil and current coils are wounded, as shown above in the diagram. Mechanism of counting and displaying the amount of energy transferred. Aluminium discs are acted upon by the two coils one is voltage coil and the other is current coil.
Electric power, p, is defined as the rate at which electric energy, a work, is. You should also make a dc measurement of stator winding linetoline resistance. Various applications toshiba motor is used for various applications. About 96% of these are energy meters, 2% are power meters. Us583950a us583950da us583950a us 583950 a us583950 a us 583950a us 583950d a us583950d a us 583950da us 583950 a us583950 a us 583950a authority us united states. As a rule, delta voltage is used for the calculation of values in three phase systems.
Jan 16, 2018 in this video, i also explain the 3 phase distribution board diagram in which i explain the three phase kwh meter connection and installation, 4 pole mccb wiring, double pole mcb, double pole rcd. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. The stator is supplied by a balanced 3 phase ac power. The meters should be suitable for three phase four wire system, capable to record and display monthly average p. This article is really good kurrey consultancy services november 25, 2018 at 2. By using these three phase meters, it is also possible to measure high voltages and currents by using appropriate transducers. Finally plan to test the 120v meter on my honda 6500w generator which outputs 30a at 240v on one of the connectors. Threephase ctpt operated keypad energy meter operation. A9mem3155 iem3155 energy meter 63 a modbus 1 digital i 1 digital o multitariff. Explain basic principle and development of torque expressions for energy meter. Electromechanical type the electromechanical induction meter operates by counting the revolutions of a. The electric energy generated purchased by consumers for different needs. W p t delta voltage neutralpoint displacement voltage.
Solenoids or capacitors, which are passive type elements induce reactive power. Construction driving system, moving system, braking syatem, and registering system 4. Operating principle of single phase induction type energy meter. Polyphase systems have three or more energized electrical conductors carrying alternating currents with a defined phase angle between the voltage waves in each conductor. Y2 series three phase induction motors dimensions and rated output are in conformity with international. The simplest such instrument is single phase induction type energy meter. Testing of energy meters under three phase determined and random nonsinusoidal conditions article pdf available in metrology and measurement systems xxi22014. Use of instrument transformers for extension of instrument range. Induction type measuring instrument energy meter 1. Working of single phase induction type energy meter.
Single phase induction type energy meter is also popularly known as watthour meter. Technical data singlephase energy meter, threephase meters and energy. Below is the connection of 3 phase three phase or poly phase 3 phase,4 wire kwh meter digital or analog energy meter from the supply to the main distribution board. This type of smart meter is designed for lv or hv three phase users. 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. Energy meters are the basic part to measure the power consumption. 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. M50s01 three phase dc meter with ami capabilities m52s01 three phase ct meter with full ami capabilities aistan m53z three phase dc type ultra smart modular energy meter aistan m54z three phase ct, ctvt operated ultra smart modular energy meter aistan m56z 3 phase ultra smart, modular energy meter dc type aistan m57z 3 phase. The three phase energy meter was implemented in the laboratory with a.
Rs485 bus two way threephase energy meter dsz14wdrs3x5a mid. Connections if a balance symmetrical load is connected across three phase voltage system in parallel, then the three currents will flow in neutral wire which quantities would be same, but they would be differ by 120 out of phase, hence. Please share your comments and suggestions on the comment section given below. Give the connections as per the circuit diagram above. Note down the reading of two meters in a given period of time, say 2 minutes. Single phase energy meter working of single phase induction. Technical specifications for three phase energy meter. A wide variety of three phase analog energy meter options are available to you, such as phase, display type. Therefore, this type of meter is also called an integrating meter. It is used everywhere, no matter how big or small consumption it is. This article focusses only on its constructional features and its working. A 3 phase induction motor has same four systems but they are arranged in a different way as shown in the figure given below.
The dd862 type single phase watthour meter is a kind of induction type meter which is applicable to. 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. This document describes how to use the mcp3909 3phase energy meter reference design as a development tool to emulate and debug firmware on a target board. It is used in domestic and industrial ac circuit for measuring the power consumption.
Procedure for calibration and testing of single phase energy meter. Single phase induction type energy meter consists of four important systems which are written as follows. They are typically calibrated in billing units, the most common one being the kilowatt. Phasor diagram of single phase induction type energy meter 6. Working on a 240v meter in a box which i will have done soon to test my amateur radio linear amplifier. Product overview important information on using the mcp3909 3phase energy meter reference design including a getting started. Facilities instructions, standards, and techniques volume 3 10 watthour meter maintenance and testing internet version of this manual created december 2000 facilities engineering branch denver office denver, colorado the appearance of the internet version of this manual may differ from the original, but the contents do not.
Assuming the supply voltage and frequency constant, the induction type energy may have the following errors. Calibration and testing of singlephase energy meter. Due to alternating fluxes there is an induced emf, the emf produced at one. Frame size 180m and above, 380660v50hz is standard. The maximum number of products that can be compared is 4. One single phase wattmeter plus miscellaneous apparatus as needed. Apr, 2012 introduction single phase induction meter 3. Mechanism of rotation of an aluminum disc which is made to rotate at a speed proportional to the power. The meter has been granted eec model approval certificate by.
Feb 15, 2014 induction type measuring instrument energy meter 1. The three phase energy meter is used for measuring the large power consumption. The three phase meter is constructed by connecting the two single phase meter through the shaft. Y2 series 3 phase induction motors are characterized with high efficiency and energy saving, large starting torque, excellent performance, low noise and vibration, compact structure, high reliability, easy operation and so on. Here we are going to discuss the single phase induction type in detail. One half of the copper is required and the wire transmission losses will be halved. The meter is equipped with several communication port, it has a remote interface, which is using for ami system building.
Before testing a 3 phase energy meter torque balance is obtained in this way. Simplified perphase equivalent circuit core loss is embedded with friction, windage and strayload loss v ag l d m ag d c l l p p p i r s s p i r s p i r p i r w z w z 3 1 3 3 3 2 2 2 2 2 2 2 2 2 1 2 1. One meter for the 240v and 2 meters for each side of the 120v. A 3 phase energy meter has same elements as in case of a single phase 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. Energy saving features of toshiba three phase induction motor 1. Three phase watthour meters direct connection or connection through current transformers for electric energy measuring on three phase networks with four wires t2ca43m type are certificated in accordance with mid directive 2004ec. It is a wellknown and most common type of ageold energy meter.
The total energy is the sum of the reading of both the elements. Three phase onerate electric meters are meant for measuring active or reactive electric energy consumption on 3 or 4 wire three phase networks. This is all about types of energy meter and their working. 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. A polyphase system is a means of distributing alternatingcurrent electrical power where the power transfer is constant during each electrical cycle.
Below is the most common inner connection of of 3 phase energy meter. Single phase electromechanical induction energy meter. Induction type energy meter ii electrical technology ii unit 3 duration. Their construction and operation comply with the technical requirements provided by iec 6205311, en 504702, din 43857 and iec 60145 standards. When alternating current flow though two suitably located coils produces rotating magnetic field which is cut by the metallic disc suspended near to the coils thus emf induce in the disc which is circulates eddy current in it. Energy meter is an instrument which measures electrical energy. Dt722 three phase electrical meter the dt722 three phase fourwire kwh eelctricity meter, it has function of identifying the power dire. Flexible 5 ratings correspondence 220380415v50hz,220440v60hz is standard.
It comprises a rotating aluminum disc placed on a spindle between two electromagnets. Pdf this paper presents design and construction of a threephase smart energy meter. Jul, 2016 operating principle of 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. Hence it is the working of induction type energy meter, adjustment of induction type energy meter.
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