Popularly, when receiving a pulse signal, the stepper motor will rotate a fixed angle namelystepping angle according to the direction set for the stepper motor. When connected to loads, they consume less power and start measuring instantaneous. The unit is 1 var energy a is called passive energy a reactive qt. Mar 28, 2017 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. Usually power is generated and distributed in three phase system, and therefore it is obvious that we would need three phase transformers to step up and step down voltages. Home measurements 3 phase energy meter working,construction,uses. The torque of both the elements is added mechanically, and the total rotation of the shaft is.
The voltage terminals of the wattmeters are connected phase to phase. It is capable of measuring and displaying kilowatthours delivered to and received from a load. This is the basic principle of working of an induction type meters. The torque of both the elements is added mechanically, and the total rotation of the shaft is proportional to the three phase energy consumption.
In the above simulation the concept of decoder with 3 inputs is used and instead of energy meter multimeter was. By implementing the watthour meter, we can know how much amount of electrical energy is used by a consumer or a residence or an electrically powered device or a business. Pdf a prototype design for three phase smart energy meter. Energy meter working principle and construction electronic. Jul 25, 2018 watthour meter is in fact a measuring device which can evaluate and records the electrical power passing through a circuit in a certain time. So, electronic type of three phase energy meter is explained below with its working principle. What is the working principle of wattmeter and an energy meter. The unit is 1 vars for sampled data voltage and current. Mechanism of rotation of an aluminum disc which is made to rotate at a speed proportional to the power. A second terminal block between the current transformer and the meter simplifies service work.
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. It consumes a small amount of power, typically around 2 watts. 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. This type of smart meter is designed for lv or hv three phase users. What is the solution for the drawbacks of commonly used energy meters. A 3 phase energy meter has same elements as in case of a single phase energy meter. Principle of operation of the meter, outlining the methods and stages of computation. 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. Electrical energy meters principles and applications. An electronic energy meter eem functionally outperforms the traditional ferraris wheel meter. Energy meters are the basic part to measure the power consumption.
The construction and principle of operation of single phase energy meters is explained below. A measuring system with three multipliers is required for 4wire threephase systems of unbalanced load with neutral conductor n. Electronic meters need for prepaid energy meter system. 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. The 1 phase power meter pcegpa 62 graphic power quality analyzer with network analyzer power and energy meter with data logger. Register types the focus kwh is an active energy kwhonly meter. W p t delta voltage neutralpoint displacement voltage. It is used in domestic and industrial ac circuit for measuring the power consumption. An energy meter is used to measure the energy consumed in the kilowatt hours. Aug 21, 2019 why three phase power not only delivers real cost savings but creates a more efficient data center. When the three phase power factor meter is connected in the circuit, under balanced load conditions, the angle through which the pointer is deflected from the unity power factor position is equal to the phase angle of the circuit, because the two moving coils are fixed 120 apart. Previously we have built a energy meter circuit which sends you sms about the bill using gsm module. Working of single phase induction type energy meter.
Now there are two types of induction meters and they are written as follows. Three phase ctpt operated keypad energy meter 10 shenzhen inhemeter co. Pdf a single phase microcontroller based energy meter. Electric power, p, is defined as the rate at which electric energy, a work, is. A singlephase meter is used in alternating current systems. Electrical energy meters for partial consumption electronic threephase energy meter with indirect connection, assembly on din rail or adaptable to panels electronic threephase meter active and reactive energy with indirect connection for din rails or adaptable to a panel. Understanding ultrasonic flow meters and its working principle in water flow measurement.
Sep 06, 20 how does 3 three phase power meter work. The principle of working and construction of induction type meter is very simple. Socket switching actuator fsva230v10a with current measurement. Js if a charge, dq, due to voltage difference v flows between two points a and b. The energy accumulation register has capacity to display 999999 kwh for all meter forms without overflowing. Traditional electromechanical meters measure energy based on the principle of magnetic induction. The principle of kwh and kvarh elements is the same as in 3 phase meters, whereas kvah element records mechanically with the differential gearing arrangement trivector meter. Mar 29, 2019 the principle of rotating type phase sequence indicator is similar to that of a three phase motor. Single phase induction type energy meter is also popularly known as watthour 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. 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. If one uses one kilowatt in onehour duration, one unit of energy gets consumed. The energy is the total power consumed and utilised by the load at a particular interval of time.
What is the working principle of energy meters measure. When it comes to electricity, the thing of biggest concern is to keep the current and voltage levels within tolerable limits. Mechanism of counting and displaying the amount of energy transferred. Principle wem monitors the energy consumption for a single phase supply. The number of revolutions is thus proportional to the energy usage. F, a single phase microcontroller based energy meter, ieee instrumentation and. What are the advantages and disadvantages of usual energy meters. Technical data singlephase energy meter, threephase meters and energy.
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. The principle of rotating type phase sequence indicator is similar to that of a three phase motor. Types of energy meters and their working principles elprocus. It is used everywhere, no matter how big or small consumption it is. And for energy in three phase systems the following. The power companies benefits from eem in three significant ways. There are four main parts of the operating mechanism i driving system ii moving system iii braking system. Mar 27, 2016 there are basically 3 types of energy meters. This paper presents a single phase electrical energy meter based on a microcontroller from microchip technology inc. Single phase induction type energy meter consists of four important. The working principle of an electronic energy meter is a device that measures the electronic energy consumed usually in kwh.
Single phase energy meter theory pdf download mastercard. Utilities install these instruments at every place like homes, industries, organizations to charge the electricity consumption by loads such as lights, fans and other appliances. Technical specifications for three phase energy meter the equipment covered by these broad specifications shall conform to the requirements stated in latest editions of relevant indian iec standards and regulations. Electrical energy meters principles and applications energy management. The three phase energy meter was implemented in the laboratory with a current. Overview of single phase induction type energy meter. Three phase scheduleii a technical specifications for three phase lt static whole current solid state electronic energy meters with backlit lcd display suitable for net metering 1 scope. The one phase harmonic analyzer graphic power quality analyzer is used for single phase or three phase measurements of active, reactive and apparent power, power factor, phase angle, energy, voltage, current as well as peaks and harmonics. Prepaymentprepaid energy meter introduction and working. The three phase energy meter has two discs mounted on the common shaft. So energy meters measure the rapid voltage and curren. The product of i and v of which phase shift angle of. This is used in each and every house and industry for calculating the energy consumed by them.
For three phase motors, we require three phase power supply, whereas this three phase power must be supplied in a particular sequence. In this project we make a smart electricity energy meter using arduino and esp8266 wifi module which can not only sends you a smsemail of your electricity bill but also you can monitor the energy uses anytime and from anywhere in the world. Electrical energy meters for partial consumption electronic three phase energy meter with indirect connection, assembly on din rail or adaptable to panels electronic three phase meter active and reactive energy with indirect connection for din rails or adaptable to a panel. Consider the working of a motor for a better understanding of these indicators. The basic unit of power is watts and it is measured by using a watt meter. Here we discuss the construction and working principle of induction type energy meter. By using these three phase meters, it is also possible to measure high voltages and currents by using appropriate transducers. Working principle and construction of energy meter video lecture of. This meter is able to perform current, voltage and power measurements in three phase supply systems. According to blondells theory 9, the number of wattmeters.
The electromechanical induction meter operates by counting the revolutions of an aluminium disc which is made to rotate at a speed proportional to the power. Electric utilities use electric meters installed at customers premises for billing and monitoring purposes. Single and three phase wattmeters and energy meters. What is the working principle of energy meter answers. Threephase ctpt operated keypad energy meter operation manual. Energy meter is an instrument which measures amount of electrical energy used by the consumers. This motors rotor is connected to a register that counts the. When used in electricity retailing, the utilities record the values measured by these meters to generate an invoice for the electricity. By using these three phase meters, it is also possible to measure high voltages and currents by using appropriate. The working of single phase induction type energy meters are based on two main fundamentals.
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. Stepper motor is an actuator transforming electric pulse into angular displacement. Once connected to the source, the currents in three coils will be balanced and symmetrical, the magnetic flux density generated by these currents stator at any arbitrary moment is given by. Design and implementation of wireless energy meter system. One important advantage of eem is that in non linear loads, its metering is highly accurate and electronic measurement is more robust than that of the conventional mechanical meters. The basic working of single phase induction type energy meter is only focused on two mechanisms. Threephase ctpt operated keypad energy meter operation. The fundamentals of threephase power measurements three phase three wire connection two wattmeter method where three wires are present, two wattmeters are required to measure total power.
How does 3 three phase power meter work by aradhana issuu. In this video we explain 3 phase kwh meter connection with ct operated, basically this type of kwh meter is use for ratting ratting load because to direct measure reading on high load not possible. The electronic energy meter is also better protected against tampering than its mechanical predecessor, and units for prepaid operation e. This electronic meter does not possess any rotating parts, and the. Hence due to these two torques which are in different directions, the metallic disc moves. Full house wiring diagram using single phase line energy. Trivector meter the meter is very reliable, robust and practically free. The conventional method of electricity billing involves a person from the distribution unit reading the number of units of electricity consumed in the energy meter, conveying this information to the distribution unit and then preparing the bill according to the units consumed for a fixed amount of time.
By implementing the watthour meter, we can know how much amount of electrical energy is used by a consumer or a residence or an electrically powered. Three phase energy meter working, construction an energy meter is used to measure the energy consumed in the kilowatt hours. Iot based electricity energy meter using esp12 and arduino. Jun 30, 2018 working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic instrumentation and measurement for electrical, electronics, extc. It is often incased in glass and has a disk that rotates that. A wide variety of 3 phase energy meter working principle options are available to you. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. They consist of a motor whose torque is proportional to the power. Throughout north america, homes are powered by 120volt single phase electricity.
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