The working of single phase induction type energy meters are based on two main fundamentals. 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 voltage and currents of the power line are rated down to signal level using transducers like voltage and current transformers and given to that ic as shown in the figure. Digital energy meters by the millions analog devices. Implementation of a singlephase electronic watthour meter using msp430afe2xx rev. Construction driving system, moving system, braking syatem, and registering system 4. A wide variety of single phase energy meter options are available to you, such as single phase, single, and three phase. What is the solution for the drawbacks of commonly used energy meters. Calculate the number of revolutions made by it, when connected to a load carrying 40 a at 230v and 0. This electronic meter does not possess any rotating parts, and the. Mechanism of rotation of an aluminum disc which is made to rotate at a speed proportional to the power. 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.
Analog meters also known as electromechanical are the most common, the simple meter spins forward when your using electricity. Calibration and testing of singlephase energy meter. The countis e63 is a modular active electrical energy meter which provides metering for three singlephase loads, with direct connection of up to 100 a. 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. You can also choose from digital only, analog and digital, and analog only single phase energy meter there are 2,981 suppliers who sells single phase energy meter on. Dds102j1 single phase electronic energy meter register display. Pdf this paper presents a single phase electrical energy meter based on a microcontroller. With another electrical wiring class, i am gonna to publish a post about energy meter wiring diagram or how to wire a single phase kwh kilowatt hour energy meter. A single phase microcontroller based energy meter conference paper pdf available in conference record ieee instrumentation and measurement technology conference 2.
The meter which is used for measuring the power of three phase supply is known as the three phase energy meter. Explain basic principle and development of torque expressions for energy meter. By implementing the watthour meter, we can know how much amount of electrical energy is used by a consumer. Energy meter is an instrument which measures electrical energy. What are the advantages and disadvantages of usual energy meters. Analog luxmeters display values on a dial usually with a. Watthour meter is in fact a measuring device which can evaluate and records the electrical power passing through a circuit in a certain time. It directly displays the total and partial energy and power kwh and kw consumed by each single. Electric utilities use electric meters installed at customers premises for billing and monitoring purposes. This electronic meter does not possess any rotating parts, and the energy consumption. Arrangement of counting and displaying the amount of energy consumed. It is often incased in glass and has a disk that rotates that. Mqx enabled mcf51em256 singlephase electricity meter reference design, rev. Threephase and singlephase energy meters, highquality pdf.
The red wire shows the live or line or phase and the blake shows the neutral wire. Therefore, this type of meter is also called an integrating meter. Implementation of a single phaseelectronic watthour meter using the msp430afe2xx feng hou, percy yu. The basic working of single phase induction type energy meter is only focused on two mechanisms. Note down the reading of two meters in a given period of time, say 2 minutes. 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. The aluminium disc is supported by a spindle which has a worm gear which drives the register.
Single phase energy meter hxe12kp hexing electrical co. An experienced person can tell if the motor is working at single phase or. The working principle of an electronic energy meter is a device that measures the electronic energy consumed usually in kwh. Drm121, mqxenabled mcf51em256 singlephase electricity meter.
So the eem is known as static energy meter in eem the accurate functioning is controlled by a specially designed ic called asic application specified integrated circuit. There are different types of energy meters such as prepaid energy meters, induction type energy meters, analog or digital electric energy meters, three phase or single phase energy meters, electromechanical energy meters, microcontroller based wireless energy meters, smart energy meters and so on. C to the pressure coil circuit by means of phase shifting transformer. The energy is the total power consumed and utilised by the load at a particular interval of time. In this post i only share with you diagram in which i shown the complete method of energy meter wiring or instillation. The rotation of metallic disk is operated by two coils. Induction type energy meter used invariably to measure the energy consumed in any a.
It uses ad7755, a singlephase energy measurement ic to acquire and process the input voltage and current parameters. Operating principle of single phase induction type energy meter. The traditional form of wattmeter is called as dynamometer wattmeter. Energy meter circuit detailed project with source code. The three phase meter is constructed by connecting the two single phase meter through the shaft. Energy meters are the basic part to measure the power consumption. Handbook on electricity meters asiapacific economic cooperation. These graphics below shows the above idea in a very simple way. In the induction type single phase energy meter, the flux produced by shunt magnet. One single phase energy meter, one single phase load, stop watch and connecting wires. Power consumption is shown by a bar flashing at a rate of 100 times per kwh. The threewattmeter method can also be used in the absence of a neutral conductor if an artificial neutral is available. Mechanism of counting and displaying the amount of energy transferred.
Presented here is a simple energy meter using analog devices ade7757 chip for singlephase, 2wire phase and neutral systems used in households. 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 continued. It is used in domestic and industrial ac circuit for measuring the power consumption. Electromechanical energy meters have been the standard for metering the electricity since billing began. 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 energy meter is used to measure the energy consumed in the kilowatt hours. Design and implementation of wireless energy meter system. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic instrumentation. Types of energy meters and their working principles elprocus. Single phase energy meter theory pdf download mastercard. Direct display with the singlephase energy meter with energy consumption indicator. Procedure for calibration and testing of singlephase energy meter.
Implementation of a singlephase electronic watthour. When connected to loads, they consume less power and start measuring instantaneous. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. Digital multimeter working principle electrical academia. Singlephase electric meter with isolated energy measurement. The electronic energy meter is also better protected against tampering than its mechanical predecessor, and units for prepaid operation e. The light that falls on to the photocell or sensor contains energy that is converted to electric.
How to wire single phase kwh energy meter electricalonline4u. Analog multimeter uses an electromechanical component called a darsonval movement to move the pointer along the scales to display measured values when the test leads are connected to a circuit, device, or circuit component. As shown in the above figure, the wattmeter has two sets of coils. Analog multimeter working principle electrical academia. These may be single or three phase meters depending on the supply utilized by domestic or commercial installations.
This is used in each and every house and industry for calculating the energy consumed by them. If the analog meter is bidirectional it will spin backwards when your solar electric system is pushing extra electricity. Here we discuss the construction and working principle of induction type energy meter. A measuring system with three multipliers is required for 4wire threephase systems of unbalanced load with neutral conductor n. Phasor diagram of single phase induction type energy meter 6. The speed of a single phase digital meter 1600mp or kwh 50hz can be reduced. Give the connections as per the circuit diagram above. Threephase ctpt operated keypad energy meter operation.
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. Principle wem monitors the energy consumption for a single phase supply. Study of single phase induction type energy meter or watt. Electronic energy meter is based on digital micro technology dmt and uses no moving parts. Working of single phase induction type energy meter. It is used everywhere, no matter how big or small consumption it is. The function of recording or registering mechanism is to record continuously a number on the dial which is proportional to the revolutions made by the moving system. To study the construction and working of single phase energy meter and to find out energy consumed in 30 minutes. The 1phasepower meter pcegpa 62 graphic power quality analyzer with network analyzer power and energy meter with data logger. A 3phase energy meter has same elements as in case of a singlephase energy meter. Microcontroller based wireless energy meter working. A singlephase meter is used in alternating current systems. But these are now being gradually replaced by electronic digital energy meters. The type of meter described above is used on a singlephase ac supply.
Electronic single phase watthour meter adopts largescale ic, the latest microelectronic technologies and smt techniques. Mqxenabled mcf51em256 singlephase electricity meter reference design, rev. A digital multimeter much like an analog meter, it is able to read voltage, current, and resistance. This device is available in a purely electronic form too which is known as digital wattmeter. The onephase harmonic analyzer graphic power quality analyzer is used for singlephase or threephase measurements of active, reactive and apparent power, power factor, phase angle, energy, voltage, current as well as peaks and harmonics. The above drawing shows a simple single phase motor circuit, which contains a. Different phase configurations use additional voltage and current coils. Overview of single phase induction type energy meter.
The dynamometer wattmeter works on the motor principle. The total energy is the sum of the reading of both the elements. Pdf design and building a singlephase smart energy meter using. A digital multimeter dmm is a multifunctional meter that displays its electrical quantitative values on an lcd screen. The single phase electrical energy meter principle block diagram is shown in fig. For small service measurements like domestic customers, these can be directly connected between line and load. Singlephase digital energy measurement has been widely accepted among many prepayment meter. So, electronic type of threephase energy meter is explained below with its working principle. These signals are sampled and converted into digital, multiplied by one another to get the instantaneous power. Electrical energy meters principles and applications.
The measurement of energy is accomplished by means of a voltagefrequency converter connected downstream from the power meter. The register is a series of dials which record the amount of energy used. An analog multimeter is a meter that can measure two or more electrical properties and display the measured properties along calibrated scales using a pointer. Lux meter definition, function, diagram, applications, pdf.
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