Phasor diagram of single phase induction type energy meter 6. Understanding the basic theory of shieldedpole shunt magnet. Study of single phase induction type energy meter or watt. It uses ad7755, a single phase energy measurement ic to acquire and process the input voltage and current parameters. The mcp3909pic18f85j90 single phase energy meter reference design is a fully functional single phase meter. Single phase energy meter working of single phase induction. The device incorporates three adcs with a high accuracy energy measurement core.
The three phase meter is constructed by connecting the two single phase meter through the shaft. 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. The design uses a halfwave rectified power supply circuit and a shunt current sensing element. Mid meters require no subsequent calibration with calibration mark. For friction compensation in an induction watthour meter is done by making a. Note that no printed catalogs are available but all necessary source files, in sections, are available for download from the shopping kiosk. Pic18f87j72 singlephase energy meter calibration users guide. Therefore, this type of meter is also called an integrating meter. What is the solution for the drawbacks of commonly used energy meters. If energy be supplied to any system of conductors through n.
The complete set up consists of two energy meters, wattmeter, voltmeter. Single phase electricity is connected at 230 or 240 volts via 2 wires, active and neutral, and is found in most domestic settings. Single phase 230v 15a direct connected, pulse output this innovative two din module kwh energy meter measures the real consumption of active energy to class 2 accuracy with a resolution of 0. Digital energy meters single phase nonexpandable three phase expandable digital energy meters 2 dme d100 t1 dme d110 t1 dme d120 t1 high current the 40a rated current direct connection is the highest of digital meter category in a 1module housing size 17. Procedure for calibration and testing of single phase energy meter. Thus we need an integrating instrument which can measure and record the energy consumed by the load under varying load condition.
Residential house wiring using fuse, switch, indicator, lamp and energy meter 5. It is used everywhere, no matter how big or small consumption it is. 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. Single phase circuit diagram of the device enclosed with the. 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. Figure 3 shows a simple capacitor power supply for a single output voltage of 3. 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. Programmable single phase energy metering ic with tamper. Single phase, multifunction metering ic with neutral. Single phase electricity meters gas meters energy meters.
Single phase induction type energy meters electrical. The induction type single phase watthour meters uses a. A singlephase meter is used in alternating current systems. A single mcp3909 acts as the analog front end measurement circuitry. Energy meters are the basic part to measure the power consumption. A measuring system with three multipliers is required for 4wire threephase systems of unbalanced load with neutral conductor n. These mid meters are all compact and lightweight and rated as class 1 and 2, so you can rely on electricity meter accuracy. 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. Electronic single phase watthour meter adopts largescale ic, the latest microelectronic technologies and smt techniques. The construction of the single phase energy meter is shown in the figure below.
Instead, they are the equivalent of calibrated meters as a result of mid testing and an eu. The powerfactor is of a single phase electro dynamo meter type power factor meter, it consists of a fixed coil which act as the current coil, this coil split up m to two parts and carries the current of the circuit under test. The total energy is the sum of the reading of both the elements. Select the help menu, and then topics to open a list of available online help files. Ac energy measurements induction energy meter every household accuracy about 2 % current. It is used in domestic and industrial ac circuit for measuring the power consumption. The ade7953 is a high accuracy electrical energy measurement ic intended for single phase applications.
For the circuit above, the drive provided is approximately 25 ma. The simplest such instrument is single phase induction type energy meter. Theory and operation phasor diagram of single phase induction type energy meter. Energy meter circuit detailed project with source code. Technical specifications for single phase electronic energy meter of. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. Measurement of energy using single phase energy meter 6. The commercial unit of electrical energy is kilowatt hour kwh. Operating principle of single phase induction type energy meter. Presented here is a simple energy meter using analog devices ade7757 chip for single phase, 2wire phase and neutral systems used in households. The design is intended to be low cost and is transformerless.
Measurement of energy using 1phase energy meter connection. Pic18f87j72 singlephase energy meter calibration users. But these are now being gradually replaced by electronic digital energy meters. Single phase induction motor double revolving field theory the three phase induction motor starting torque inversely depends on the slip this implies that a small positive slip 0. The meter which is used for measuring the power of three phase supply is known as the three phase energy meter. Energy meter is an instrument which measures electrical energy. This design implements a highaccuracy single phase embedded energy measurement application using msp430afe253. Mechanism of rotation of an aluminum disc which is made to rotate at a speed proportional to the power.
A single phase microcontroller based energy meter conference paper pdf available in conference record ieee instrumentation and measurement technology conference 2. Threephase and singlephase energy meters, highquality pdf. Electrical energy meters principles and applications. It is used in domestic and industrial ac circuit for measuring the power. Single phase energy meter theory pdf download mastercard. Mqxenabled mcf51em256 singlephase electricity meter reference design, rev. The basic working of single phase induction type energy meter is only focused on two mechanisms. Calibration and testing of singlephase energy meter. Working of single phase induction type energy meter. However the meter should withstand the maximum system voltage. Note down the reading of two meters in a given period of time, say 2 minutes. Induction type energy meter used invariably to measure the energy consumed in any a. Ade7752b 3phase, 3wire, and 4wire energy metering ic.
Give the connections as per the circuit diagram above. Electromechanical energy meters have been the standard for metering the electricity since billing began. Drm121, mqxenabled mcf51em256 singlephase electricity meter. The single phase electrical energy meter principle block diagram is.
Measurement of resistance to earth of electrical equipment ii list of experiments for electronics engineering lab 1. Construction driving system, moving system, braking syatem, and registering system 4. The threewattmeter method can also be used in the absence of a neutral conductor if an artificial neutral is available. Therefore, this type of meter is also called anintegrating meter. Electrical measurements lab manual pdf em lab manual pdf. 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. Explain basic principle and development of torque expressions for energy meter. Single phase energy meter theory pdf download mastercard downlood triber vodafon author. Implementation of a singlephase electronic watthour. It measures line voltage and current and calculates active, reactive, and apparent energy, as well as instantaneous rms voltage and current. The 1 phase power meter pcegpa 62 graphic power quality analyzer with network analyzer power and energy meter with data logger. 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 ade7752b specifications surpass the accuracy requirements as quoted in the iec6205321 standard. 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.
The only analog circuitry used in the ade7752b is in the. Use of instrument transformers for extension of instrument range. The energy is the total power consumed and utilised by the load at a particular interval of time. The design measures active power, voltage, current, power factor and line frequency in a single phase distribution environment and displays active energy, voltage. What are the advantages and disadvantages of usual energy meters. Singlephase energy meter with tamper detection based on. The gf302d1 three phase portable energy meter test system consists of an integrated three phase current and voltage sourceup to 500v120a or 500v20a and builtin three phase electronic. 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.
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