The detail explanation of their parts is written below. Compatible with 3phase, 3wire delta and 3phase, 4wire wye configurations supplies average active power on the frequency outputs f1 and f2 high frequency output cf is intended for calibration and supplies instantaneous active power logic output revp indicates a potential miswiring or negative power on the sum of all phases. Go back to three phase power measurements singlephase threewire connection. Presented here is a simple energy meter using analog devices ade7757 chip for singlephase, 2wire phase and neutral systems used in households. Level of automation achieved and lists of areas where manual processing exists. Finally, this design demonstrates a method for meter calibration using the. A single phase energy meter prototype has been implemented in the lab to provide measurement up 10 a load current from a 127 v line voltage. A singlephase meter is used in alternating current systems. Mechanism of counting and displaying the amount of energy transferred. Understanding the basic theory of shieldedpole shunt magnet.
The three phase meter is constructed by connecting the two single phase meter through the shaft. There is a small display window in the front of the meter which displays the reading of energy consumed with the help of dials. Single phase energy meter all you need to know toppr. The total energy is the sum of the reading of both the elements. Drm121, mqxenabled mcf51em256 singlephase electricity meter. Mid meters require no subsequent calibration with calibration mark. This is the basic principle of working of an induction type meters.
To make the phase angle between flux produced by shunt magnet and supply voltage about 900, small adjustments in the place of the ring is required. Pic18f87j72 singlephase energy meter calibration users guide. Singlephase multifunction metering ic with didt sensor interface ade7753 rev. A singlephase energy meter prototype has been implemented in the lab to provide measurement up 10 a load current from a 127 v line voltage. The device can be implemented for peripheral measurement in a microcontrollerbased singlephase or polyphase energy meter. These mid meters are all compact and lightweight and rated as class 1 and 2, so you can rely on electricity meter accuracy. Working of single phase induction type energy meter. Construction driving system, moving system, braking syatem, and registering system 4. P1, p2, p3 power of phase 1, phase 2 and phase 3 in watt w v voltage in volt v exemple. What are the advantages and disadvantages of usual energy meters. Single phase 2wire meter 8 wl s wl s wl 14s wb 14s circuit system single phase 2wire rated current a 1030 rated voltage v 220 load capacity %in 300 circuit system single phase 2wire rated current a 40120 rated voltage v 220 load capacity %in 300 circuit system single phase 2wire rated current a 1040. Single phase circuit diagram of the device enclosed.
Calibration and testing of singlephase energy meter. The threewattmeter method can also be used in the absence of a neutral conductor if an artificial neutral is available. The meter which is used for measuring the power of three phase supply is known as the three phase energy meter. 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. Operating principle of single phase induction type energy meter. It provides a variety of energy measurements including active, reactive, and apparent energy, along with current and voltage rms readings. Electronic single phase watthour meter adopts largescale ic, the latest microelectronic technologies and smt techniques.
It uses ad7755, a single phase energy measurement ic to acquire and process the input voltage and current parameters. The most common type of electricity meter is the electromechanical watthour meter. Single phase electricity explained wiring diagram energy. There are four main parts of the operating mechanism of single phase induction type. Threephase and singlephase energy meters, highquality pdf. This evm has builtin support for measuring ac voltage, current, active power, reactive power, apparent power, frequency, power factor, dc. A single phase microcontroller based energy meter conference paper pdf available in conference record ieee instrumentation and measurement technology conference 2. A polyphase system must provide a defined direction of phase rotation, so mirror image voltages do not count towards the phase order. Mechanism of rotation of an aluminum disc which is. Give the connections as per the circuit diagram above. Explain basic principle and development of torque expressions for energy meter. The basic working of single phase induction type energy meter is only focused on two mechanisms. In this video we learn electrical engineering basics by learning single phase meter wiring diagram.
Single phase electricity is connected at 230 or 240 volts via 2 wires, active and neutral, and is found in most domestic settings. Mqxenabled mcf51em256 singlephase electricity meter reference design, rev. Measurement of energy using 1phase energy meter connection. Pic18f87j72 singlephase energy meter calibration users. How electricity reaches our homes from the power station. The electricity meters in our single phase meter range are all mid approved meters. This device can be implemented as a single chip monophase energy meter or as a peripheral measurement in a microcontroller based monophase or 3 phase energy meter. Implementation of a singlephase electronic watthour meter. Programmable singlephase energy metering ic with tamper. Technical like three phases, single phase, ht, lt and accuracy class meters. Hxe12r electronic meter is developed and manufactured by hexing. Energy meters are almost inherently free from errors due to. Single phase induction type energy meter is also popularly known as watthour meter.
Ere0 set during the calibration process, where, for a 1kw. Electromechanical energy meters have been the standard for metering the electricity since billing began. The singlephase motor stator has a laminated iron core with two windings arranged perpendicularly. These devices include features specific for the international electrotechnical commission iec requirements, such as noload threshold and startup current. C information furnished by analog devices is believed to be accurate and reliable. This manual is for single phase energy meter for active energy. Pdf a single phase microcontroller based energy meter. Mechanism of rotation of an aluminum disc which is made to rotate at a speed proportional to the power. Figure 10 singlephase, twowire and dc measurements.
Procedure for calibration and testing of singlephase energy meter. The construction of the single phase energy meter is shown in the figure below. Ade7752b 3phase, 3wire, and 4wire energy metering ic with. Such systems are sometimes described as splitphase.
Single phase induction motor the singlephase induction machine is the most frequently used motor for refrigerators, washing machines, clocks, drills, compressors, pumps, and so forth. Therefore, this type of meter is also called an integrating meter. A single phase watt meter is use for measuring the wattage of the single phase electrical circuit, the big example of this is energy meters these are also the watt meter. Study of single phase induction type energy meter or watt. Single phase energy meter single phase induction type energy meter is also popularly known as watthour meter. A single phase meter is used in alternating current systems. But these are now being gradually replaced by electronic digital energy meters. The software can be downloaded for free from the eltako homepage. The individual pulses are then summated through the use of an electromechanical meter, and are made available at a pulse output as well. In every residence, malls, industry, everywhere energy meters are used to measure the electrical energy consumed. Two standard current sensing circuit implementations shunt resistor and ct.
Such systems are sometimes described as split phase. Handbook on electricity meters asiapacific economic. Figure 3 shows a simple capacitor power supply for a single output voltage of 3. Overview of single phase induction type energy meter. Therefore, this type of meter is also called anintegrating 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. The device can be implemented for peripheral measurement in a microcontrollerbased single phase or poly phase energy meter. V1230 v in 400 v threephases circuit i1, i2, i3 current of phase 1, phase 2 and phase 3 in ampere a cos. Single phase induction motor the single phase induction machine is the most frequently used motor for refrigerators, washing machines, clocks, drills, compressors, pumps, and so forth. Compatible with 3 phase, 3wire delta and 3 phase, 4wire wye configurations supplies average active power on the frequency outputs f1 and f2 high frequency output cf is intended for calibration and supplies instantaneous active power logic output revp indicates a potential miswiring or negative power on the sum of all phases.
This article is really good kurrey consultancy services november 25, 2018 at 2. A simple capacitive power supply for the msp430 energy meter appropriate values of resistor r22 and capacitor c49 are chosen based on the required output current drive of the. What is the solution for the drawbacks of commonly used energy meters. A measuring system with three multipliers is required for 4wire threephase systems of unbalanced load with neutral conductor n. In this system, shown in figure 11, the voltages are produced from one centertapped transformer winding and all voltages are in phase. 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. Apr, 2012 introduction single phase induction meter 3.
The analog part is composed of preamplifier and firstorder sigma. Single phase induction type energy meters electrical concepts. Phasor diagram of single phase induction type energy meter 6. Direct display with the singlephase energy meter with energy consumption indicator eva1232a. Those consumers which consume large energy needs better technology to manage their energy consumption and need more data to improve their services. Apr 26, 2017 single phase meter wiring diagram energy meter energy meter connection by earthbondhon duration. There is a copper shading ring at the central limb of the shunt magnet. Main features lcd with 8 digits display format for energy record and meter status. Pdf this paper presents a single phase electrical energy meter based on a. The analogtodigital converter adc is set to operate in free running mode, which. The single phase motor stator has a laminated iron core with two windings arranged perpendicularly. The above drawing shows a simple single phase motor circuit. A 3wire system with two phase conductors 180 degrees apart is still only single phase. Energy meter is an instrument which measures electrical energy.
The energy meter thus determines and adds together or integrates all the instantaneous power values so that total energy used over a period is thus known. This design implements a highaccuracy singlephase embedded energy measurement application using msp430afe253. The simplest such instrument is single phase induction type energy meter. Note down the reading of two meters in a given period of time, say 2 minutes. This evm has builtin support for measuring ac voltage, current, active power, reactive power, apparent power, frequency, power factor, dc voltage, dc current, and dc active power. The measurement of energy is accomplished by means of a voltagefrequency converter connected downstream from the power meter. Programmable single phase energy metering ic with tamper. Induction type energy meter used invariably to measure the energy consumed in any a. This is common in north american residential applications, where one. C to the pressure coil circuit by means of phase shifting transformer. It uses ad7755, a singlephase energy measurement ic to acquire and process the input voltage and current parameters. Jul 25, 2018 there is a small display window in the front of the meter which displays the reading of energy consumed with the help of dials. The three phase energy meter is used for measuring the large power consumption.
Single phase energy meter working of single phase induction. This design implements a highaccuracy single phase embedded energy measurement application using msp430afe253. This device can be implemented as a single chip monophase energy meter or as a peripheral measurement in a microcontroller based monophase or 3phase energy meter. Single phase electricity meters gas meters energy meters. Threephase electric machine with rotating magnetic fields. Onetime, quick, and accurate digital calibration gives added benefits. It consists of rotating aluminum disc mounted on a spindle between two electro magnets. Technical specifications for single phase electronic energy meter of. On a single phase ac supply, the electromechanical induction meter operates through electromagnetic induction by counting the revolutions of a nonmagnetic, but electrically conductive, metal disc which is made to rotate at a speed proportional to the power. Three phase electric machine with rotating magnetic fields. It features in high accuracy, low power consumption and reliable stability and superior antitampering functions. Single phase energy meter on sales quality single phase. Freemaster visualization script for calibration, watching, and so on. Jul, 2016 operating principle of single phase induction type energy meter.
Theory and operation phasor diagram of single phase induction type energy meter. However the meter should withstand the maximum system voltage. In the induction type single phase energy meter, the flux produced by. Singlephase multifunction metering ic with didt sensor. Ade7752b 3phase, 3wire, and 4wire energy metering ic. Here we are going to discuss the singlephase induction type in detail. On a singlephase ac supply, the electromechanical induction meter operates through electromagnetic induction by counting the revolutions of a nonmagnetic, but electrically conductive, metal disc which is made to rotate at a speed proportional to the power. It is the popularly known and most common type of age old watt hour meter. Energy meter circuit detailed project with source code.
In addition, the mcp3905a06a energy meter reference design demonstrates a systemlevel design that passes emc immunity requirements per the iec. This article is only focused about its constructional features and its working. 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. Thus we need an integrating instrument which can measure and record the energy consumed by the load under varying load condition. The electricity meter wh4209 and all versions of it are allowed to be used for measuring electrical energy only. Design easily downgrades to fit normal singlephase energy metering. Single phase energy meter theory pdf download mastercard downlood triber vodafon author. Single phase energy meter theory pdf download mastercard. Procedure for calibration and testing of single phase energy meter. Now there are two types of induction meters and they are written as follows.
Lowcost, class 1 singlephase energy meter solution. The calibration event can be automated, removing the timeconsuming manual. Basic three phase power measurements explained in details eep. However, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use.
888 1269 907 706 618 923 1452 759 777 158 1031 562 1012 141 51 1347 728 986 1172 750 624 500 944 900 191 896 1428 188 573 605 1129 825