Watthour meter is in fact a measuring device which can evaluate and records the electrical power passing through a circuit in a certain time. Therefore, the analogue signals are converted to digital by the circuit called adc analogue to digital converter. Analog luxmeters display values on a dial usually with a needle or pointer whereas digital devices display values as numbers letters. The energy is the total power consumed and utilised. Energy meter or watthour meter is an electrical instrument that measures the amount of electrical energy used by the consumers. What is the working principle of energy meter answers. The working principle of an electronic energy meter is a device that measures the electronic energy consumed usually in kwh. Analog luxmeters display values on a dial usually with a. An energy meter is used to measure the energy consumed in the kilowatt hours. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. The energy is the total power consumed and utilised by the load at a particular interval of time. 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. Generally, electricity meters operate by continuously measuring the. In particular, conventional current flows into the positive terminal for an upscale meter deflection as shown in above figure.
Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic instrumentation. This is used in each and every house and industry for calculating the energy consumed by them. The basic principle behind digital multimeters is the analog to digital converter because without this we are not able to convert the analog output into digital form. Some meters measured only the length of time for which charge flowed, with no measurement of the magnitude of voltage or current. 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. 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. If the analog meter is bidirectional it will spin backwards when your solar electric system is pushing extra electricity. Prepaymentprepaid energy meter introduction and working. The aim of this project is to design a sample meter can accurately display real voltage. Nov 29, 2014 the traditional form of wattmeter is called as dynamometer wattmeter. Electronic meters consists of current and voltage sensors which sense the amount of current and voltage consumed and this analog signal is sampled and digitized using adcs. Used as a redundant energy meter to verify the energy allocated by the company. 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. The light that falls on to the photocell or sensor contains energy that is converted to electric.
Digital multimeter working principle analyse a meter. The dynamometer wattmeter works on the motor principle. Here we discuss the construction and working principle of induction type energy meter. Turbine flow meter working principle instrumentationtools. As in the block diagram, the meter has a power supply, a metering engine, a. It is used in domestic and industrial ac circuit for measuring the power consumption. It is often incased in glass and has a disk that rotates that. As shown in the block diagram, in a typical digital multimeter the input signal i. A rotameter is a device that measures the flow rate of liquid or gas in a closed tube rotameter. Aug 10, 2010 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. Some can also measure other electrical quantities such as frequency or even temperature. The advantages of highly functional threephase meters for digital energy measurement have been demonstrated in north americas commercial and industrial. Since its foundation in 2000 selec has become the market leader for timers, counters and temperature controllers in india.
When used in electricity retailing, the utilities record the values measured by these meters to generate an invoice for the electricity. Calculate the number of revolutions made by it, when connected to a load carrying 40 a at 230v and 0. Energy meter an electricity meter or energy meter is a device that measures the amount of electric energy consumed by a residance,business or an electrically powered device. The unit is fully sealable and thus tamperproof billing meter. Electronic energy meter is based on digital micro technology dmt and uses no moving parts. In the release condition, pulse output potential is equal to 0. If one uses one kilowatt in onehour duration, one unit of energy gets consumed. A typical multimeter may include features such as the ability to measure.
This electronic meter does not possess any rotating parts, and the. Fmc5000 series coriolis mass flowmeter here after fmc coriolis meter is designed according to the coriolis force principle. An electric meter or energy meter is a device that measures the amount of electrical energy supplied to or produced by a residence, business. Thirdly, the user friendly display in the digital meters makes energy reading from time to time very easy. Voltmeter working principle if an ammeter is of dc type, then it has polarity signs on it for ensuring appropriate connection for an upscale indication. Rotameter working principle animation instrumentationtools. Secondly, the orientation problem associated with electromechanical energy meter is completely a nonissue in a digital energy meter. This meter is able to perform current, voltage and. Principle of working of abt meter the cpu central processing units only accepts digital signals. There are several adc available in the market, but we mainly use flash type adc due to its simplicity and fastest speed. Digital energy meters by the millions analog devices. A multimeter ora multitester, also known as a voltohm meter or vom is, an. Working principle of a transformer the basic principle on which the transformer works is faradays law of electromagnetic induction or mutual induction between the two coils.
Ammeter definition and working principle electrical academia. What is the working principle of energy meters measure. Energy meter working principle and construction electronic. Microcontroller based wireless energy meter working. Types of energy meters and their working principles elprocus.
Fast digital calibration procedure for stpm01 based energy. Lux meter definition, function, diagram, applications, pdf. By implementing the watthour meter, we can know how much amount of electrical energy is used by a consumer. Meanwhile, the problem of the distorted current waveform from loads need to be considered. Implementation of a singlephase electronic watthour meter using msp430afe2xx rev. 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. It belongs to a class of meters called variable area meters, which measure flow rate by allowing the crosssectional area the fluid travels through, to vary, causing a measurable effect. Sep 03, 2017 analog meters also known as electromechanical are the most common, the simple meter spins forward when your using electricity. 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. Oct 30, 2017 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. Energy meters are the basic part to measure the power consumption. The transformer consists of two separate windings placed over the laminated silicon steel core. Digital multimeter working principle electrical a2z.
The basic unit of power is watts and it is measured by using a watt 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. Working on a 240v meter in a box which i will have done soon to test my amateur radio linear amplifier. It is widely used for the process detecting and custody transferfiscal unit in many industries such as petroleum, petrochemical, chemical industry, pharmacy, paper making, food, energy, and so on. The resonance is the condition exists in the circuit when their inductance and capacitance reactance are of equal magnitude. All multimeters measure ac and dc voltage voltmeter, ac and dc current ammeter, and resistance ohmmeter. 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.
The cpu processes these input signals for finding kva vi, kwh vi cos, rkva vi sin and other parameters. They induce energy which is oscillating between the electric and. Implementation of a singlephase electronic watthour. Handbook on electricity meters asiapacific economic cooperation. 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. In order to accurately measure the electronic energy used for a electronic energy meter, suitable hardware and software have to be designed.
Abt meters electrical substation analog to digital. The digital signals are then processed using a dsp or a microcontroller, which then displays the amount of energy consumed on a lcd or a led display. Electronic energy meter industrial applications vishay. An electric meter or 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 electromechanical meters ac voltage load indicator voltage coil current coil al dial permanent magnet i. This is a microcontroller based wireless energy meter, as 8051 microcontroller is used for controlling the entire system. A 3phase energy meter has same elements as in case of a singlephase energy meter.
This paper presents a single phase electrical energy meter based on a microcontroller from microchip technology inc. Electrical energy meters principles and applications. Two digital outputs with optoisolated transistor informs of possible connection errors via the display. Jul 25, 2018 energy meters are the basic part to measure the power consumption.
What are the advantages and disadvantages of usual energy meters. Single phase energy meter theory pdf download mastercard. Electronic meters need for prepaid energy meter system. Pdf a single phase microcontroller based energy meter.
The meter is a little bigger than the plate and had to enlarge the hole. I have a 43 watt light bulb connected for the load in the picture which is showing 44 watts. Analog multimeter working principle electrical academia. Analog meters also known as electromechanical are the most common, the simple meter spins forward when your using electricity. Energy meter is an integrating instrument which measures the total quantity of electrical energy supplied to the circuit in given period. Apr 17, 2014 energy meter an electricity meter or energy meter is a device that measures the amount of electric energy consumed by a residance,business or an electrically powered device. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic.
This device is available in a purely electronic form too which is known as digital wattmeter. A digital multimeter dmm is an instrument that can measure several basic electrical quantities and shows the measurement with a number in a display. 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. Generally, one electronic energy meter consists of hardware and software.
If a meter is used in combination with a current transformer. A better alternative for electromechanical energy meter in nigeria article pdf available january 2011 with 2,450 reads how we measure reads. So, electronic type of threephase energy meter is explained below with its working principle. 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. The basic principles here apply equally to polyphase circuits. Ammeter definition and working principle electrical. What is the solution for the drawbacks of commonly used energy meters. Electric utilities use electric meters installed at customers premises for billing and monitoring purposes. It is used everywhere, no matter how big or small consumption it is. An innovative stpm01 approach to calibrate the energy meter. A modern digital electronic wattmeterenergy meter samples the voltage. When connected to loads, they consume less power and start measuring instantaneous. So energy meters measure the rapid voltage and currents, calculate their product and give instantaneous power. 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.
Sep, 2011 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. Induction type energy meter used invariably to measure the energy consumed in any a. The electronic energy meter is also better protected against tampering than its mechanical predecessor, and units for prepaid operation e. As shown in the above figure, the wattmeter has two sets of coils. Electricity meters are typically calibrated in billing units, the most common one being the kilowatt hour.
1525 1265 223 1155 290 772 1452 165 1159 693 337 286 230 538 247 497 1087 1416 749 1503 1150 181 165 643 1568 1127 1118 998 739 1433 134 763 1237 617 1279 381 1346