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. Here we are going to discuss the singlephase induction type in detail. The meter has been granted eec model approval certificate by. These meters will be progressively substituted by fully. The rotating disc is an aluminum disc mounted on a. Note down the reading of two meters in a given period of time, say 2 minutes. Operating principle of single phase induction type energy meter. Static wattmeters and energy meters glossary bibliography biographical sketches summary. However the meter should withstand the maximum system voltage. Utilities are one of the electrical departments, which install these instruments at every place like homes, industries, organizations, commercial buildings to charge for the electricity consumption by loads such as lights, fans, refrigerator, and other home appliances. Design and implementation of a singlephase energy meter. The design uses a halfwave rectified power supply circuit and a shunt current sensing element.
The single phase meter should be single phase two wire, two element type without dlms capable to record and display energy in kwh and demand in kw for single phase two wire a. Single phase induction type energy meters is very commonly used to. There are two types of induction meters and they are written as follows. A movingcoil permanentmagnet instrument can be used as fluxmeter. Thus we need an integrating instrument which can measure and record the energy consumed by the load under varying load condition. Manufacturer of energy meter testing equipment single phase high precision reference meter, three phase energy meter field calibrator, ratio and polarity test set and single phase portable energy meter testing equipment offered by akshyan power solutions private limited, delhi. This document is the manual for the single phase max 100 a energy meter. Direct connection, either using the rs485 to usb interface with 1. The simplest such instrument is single phase induction type energy meter. The design is intended to be low cost and is transformerless. Explain basic principle and development of torque expressions for energy meter.
Grid meter, and used as control input for an ess system 1. It is used everywhere, no matter how big or small consumption it is. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. There are four main parts of the operating mechanism of single phase induction type. Energy meter for threephase current for direct connection up to 85 a type. Presented here is a simple energy meter using analog devices ade7757 chip for singlephase, 2wire phase and neutral systems used in households. Understanding the basic theory of shieldedpole shunt magnet. The most common type of electricity meter is still the electromechanical induction watt hour meter.
Driving system consists of two electromagnets on which pressure coil and current coils are wounded, as shown above in the diagram. Single phase induction type energy meter is also popularly known as watthour meter. Design and implementation of a single phase energy meter with sms controlled and monitored recharge capability 536 fig. Given below is the picture of single phase induction type meter. Pic18f87j72 singlephase energy meter calibration users. But these are now being gradually replaced by electronic digital energy meters. Driving system moving system breaking system registering system 2.
Overview of single phase induction type energy meter. Single phase induction type energy meter consists of four important systems which are written as follows. Energy meters are the basic part to measure the power consumption. Single phase energy meter working of single phase induction. 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. Dds102j1 single phase electronic energy meter register display. The construction of the single phase energy meter is shown in the figure below.
A single mcp3909 acts as the analog front end measurement. The commercial unit of electrical energy is kilowatt hour kwh. Single phase induction type energy meter induction type single phase energy meter. Sinus 85 s0 mid function the meter consists of a multipart plastic housing. Here we discuss the construction and working principle of induction type energy meter. Their construction and operation comply with the technical requirements provided by iec 6205311, en 504702, din 43857 and iec 60145 standards. 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 meter is designed to offer reliable energy measurement in single phase circuit and is highly suitable for metering and remote communication purposes. Single phase type three phase type induction meters. Singlephase watthour meters of cmax type are induction meters meant for electric energy measuring on singlephase 2 wire or 3 wire networks. Energy meter or watthour meter is an electrical instrument that measures the amount of electrical energy used by the consumers. This low cost design uses a shunt for the current sensor in place of expensive current transformers. Induction type single phase energy meters measure electric energy in.
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. This article focusses only on its constructional features and its working. 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. A wide variety of single phase din rail energy meter options are available to you, such as display type, phase. Induction type watthour meter electrical engineering.
Threephase onerate electric meters are meant for measuring active or reactive electric energy consumption on 3 or 4 wire threephase networks. Single phase induction type energy meter is extensively used to measure energy supplied to a single phase circuit. Give the connections as per the circuit diagram above. It suits a wide range of direct connect submetering and remote monitoring scenarios with onscreen setup for easy installation. Energy meter circuit detailed project with source code. Pic18f87j72 singlephase energy meter calibration users guide 2011 microchip technology inc. The individual pulses are then summated through the use of an electromechanical meter, and are made available at a pulse output as well. Due to alternating fluxes there is an induced emf, the emf produced at one.
Bidirectional energy measurement for import and export enables solar pv energy metering. Single phase induction type energy meters electrical. Keypad single phase prepaid energy meters with sts iec. On a singlephase ac supply, the electromechanical induction meter. Study of single phase induction type energy meter or watt. The most common schemes seem to combine an existing national standard for. The simple yet reliable structure of single phase electronic energy meters readily supports the dynamic working range of the meter. The mcp3909pic18f85j90 single phase energy meter reference design is a fully functional single phase meter. The series electromagnet is energized and sets up a magnetic field cutting through the rotating disc, when load current flows through the current coil c. Working of single phase induction type energy meter the basic working of single phase induction type energy meter is only focused on two mechanisms.
These graphics below shows the above idea in a very simple way. Singlephase smart distribution test and measurement instruments. Each phase is 120 degrees out of phase with the others. Induction type energy meter essentially consists of following components. The series electromagnet is energized by a coil, known. Singlephase energy meter description the sdm220 is an advanced digital singlephase multifunction energy meter, which measures up to 100a direct load. This article is only focused about its constructional features and its working. Calibration and testing of singlephase energy meter. Electromechanical energy meters have been the standard for metering the electricity since billing began. Single phase electronic energy meters which we offer is wellequipped with large integrated circuits along with surface mounted technology. This evm has builtin support for measuring ac voltage, current, active power, reactive power, apparent power, frequency, power factor, dc. In all induction meters we have two fluxes which are produced by two different alternating currents on a metallic disc.
The three phase meter is constructed by connecting the two single phase meter through the shaft. Single phase energy meter single phase induction type energy meter is also popularly known as watthour meter. Mechanism of rotation of an aluminum disc which is made to rotate at a speed proportional to the power. Smart multifunctional three phase energy meterelectricity meterkwh meter product descript technical parameters model ds5210m nominal input range ac voltage ac57. About 93% of these are energy meters, 3% are power meters, and 0% are panel meters. The copper shading bands are also called the power factor compensator or compensating loop. 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 phase energy meter all you need to know toppr. Its small profile, high accuracy and market certification. Single phase energy meter on sales quality single phase.
Electrical energy meters principles and applications. A singlephase meter is used in alternating current systems. 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. The software supports calculation of various parameters for singlephaseenergy measurement. The red wire shows the live or line or phase and the blake shows the neutral wire. 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. Keypad single phase prepaid energy meters with sts iec standard.
Induction type measuring instrument energy meter 1. Phasor diagram of single phase induction type energy meter 6. Energy meter is an instrument which measures electrical energy. The pic18f87j72 single phase energy meter reference design ard00280 is a fully functional single phase meter featuring the pic18f87j72 mcu with analog front end. Singlephase watthour meters comply with the technical requirements provided by iec 6205311 and en 504702 standards. The meter which is used for measuring the power of three phase supply is known as the three phase energy meter. Implementation of a singlephase electronic watthour. One part is manufactured from transparent plastic and covers the lc display liquid crystal display below and the name plate.
Therefore, this type of meter is also called an integrating meter. Ii the purpose of this report is to make an analysis of two singlephase induction 4 pumps and to obtain general performance curves from which the parameters that will op timize the performance of such pumps can be determined. The energy is the total power consumed and utilised by the load at a particular interval of time. In addition to metering based on the amount of energy used, other types of. The meter complies with national and international metering standards. 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. Single phase electronic energy meter,1 phase electronic. Drm121, mqxenabled mcf51em256 singlephase electricity meter. This design implements a highaccuracy singlephase embedded energy measurement application using msp430afe253. Construction driving system, moving system, braking syatem, and registering system 4. It is used in domestic and industrial ac circuit for measuring the power consumption.
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