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. Single phase circuit diagram of the device enclosed with the. 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.
Understanding the basic theory of shieldedpole shunt magnet. The meter which is used for measuring the power of three phase supply is known as the three phase energy meter. It uses ad7755, a single phase energy measurement ic to acquire and process the input voltage and current parameters. 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. Phasor diagram of single phase induction type energy meter 6. Electronic single phase watthour meter adopts largescale ic, the latest microelectronic technologies and smt techniques. Programmable single phase energy metering ic with tamper. Electrical measurements lab manual pdf em lab manual pdf. Energy meters are the basic part to measure the power consumption.
Energy meter circuit detailed project with source code. Procedure for calibration and testing of single phase energy meter. Mid meters require no subsequent calibration with calibration mark. 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. Theory and operation phasor diagram of single phase induction type energy meter. But these are now being gradually replaced by electronic digital energy meters. Single phase electricity is connected at 230 or 240 volts via 2 wires, active and neutral, and is found in most domestic settings. Study of single phase induction type energy meter or watt. The mcp3909pic18f85j90 single phase energy meter reference design is a fully functional single phase meter. It is used in domestic and industrial ac circuit for measuring the power consumption. A measuring system with three multipliers is required for 4wire threephase systems of unbalanced load with neutral conductor n.
The induction type single phase watthour meters uses a. Single phase energy meter theory pdf download mastercard. This design implements a highaccuracy single phase embedded energy measurement application using msp430afe253. The commercial unit of electrical energy is kilowatt hour kwh. Single phase, multifunction metering ic with neutral. Instead, they are the equivalent of calibrated meters as a result of mid testing and an eu. A single mcp3909 acts as the analog front end measurement circuitry. 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. For friction compensation in an induction watthour meter is done by making a. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter.
It is used in domestic and industrial ac circuit for measuring the power. The design uses a halfwave rectified power supply circuit and a shunt current sensing element. The ade7953 is a high accuracy electrical energy measurement ic intended for single phase applications. 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. What are the advantages and disadvantages of usual energy meters.
The ade7752b specifications surpass the accuracy requirements as quoted in the iec6205321 standard. The electricity meters in our single phase meter range are all mid approved meters. Single phase energy meter theory pdf download mastercard downlood triber vodafon author. We would use watthour meters in place of watt meters and energy in place of power. The basic working of single phase induction type energy meter is only focused on two mechanisms. Operating principle of single phase induction type energy meter. Use of instrument transformers for extension of instrument range. Technical specifications for single phase electronic energy meter of. 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. Here we discuss the construction and working principle of induction type energy meter.
Singlephase energy meter with tamper detection based on. There are four main parts of the operating mechanism of single phase induction type. Electromechanical energy meters have been the standard for metering the electricity since billing began. The only analog circuitry used in the ade7752b is in the. Measurement of energy using single phase energy meter 6. For the circuit above, the drive provided is approximately 25 ma. The 1 phase power meter pcegpa 62 graphic power quality analyzer with network analyzer power and energy meter with data logger. It measures line voltage and current and calculates active, reactive, and apparent energy, as well as instantaneous rms voltage and current. A singlephase meter is used in alternating current systems. Pdf a single phase microcontroller based energy meter. Therefore, this type of meter is also called anintegrating meter. The design is intended to be low cost and is transformerless. Single phase electricity meters gas meters energy meters. The energy is the total power consumed and utilised by the load at a particular interval of time.
Ade7752b 3phase, 3wire, and 4wire energy metering ic. Implementation of a singlephase electronic watthour. Note down the reading of two meters in a given period of time, say 2 minutes. Measurement of resistance to earth of electrical equipment ii list of experiments for electronics engineering lab 1. 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. Electrical energy meters principles and applications. 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 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. 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.
Energy meter is an instrument which measures electrical energy. Pdf this paper presents a single phase electrical energy meter based on a microcontroller from. Induction type energy meter used invariably to measure the energy consumed in any a. Give the connections as per the circuit diagram above. The device incorporates three adcs with a high accuracy energy measurement core. Single phase induction type energy meters electrical. 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. However the meter should withstand the maximum system voltage. Two standard current sensing circuit implementations shunt resistor and ct. 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. Mechanism of rotation of an aluminum disc which is made to rotate at a speed proportional to the power. It is used everywhere, no matter how big or small consumption it is.
Figure 3 shows a simple capacitor power supply for a single output voltage of 3. Single phase energy meter with tamper detection based on st7flite2x introduction this application note describes the design for a single phase power energy meter with tamper detection. Threephase and singlephase energy meters, highquality pdf. Working of single phase induction type energy meter. The design measures active power, voltage, current, power factor and line frequency in a single phase distribution environment and displays active energy, voltage.
Thus we need an integrating instrument which can measure and record the energy consumed by the load under varying load condition. A single phase microcontroller based energy meter conference paper pdf available in conference record ieee instrumentation and measurement technology conference 2. Calibration and testing of singlephase energy meter. Drm121, mqxenabled mcf51em256 singlephase electricity meter. Pic18f87j72 singlephase energy meter calibration users guide. The complete set up consists of two energy meters, wattmeter, voltmeter. Construction driving system, moving system, braking syatem, and registering system 4. Explain basic principle and development of torque expressions for energy meter.
Single phase energy meter working of single phase induction. 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. Pic18f87j72 singlephase energy meter calibration users. Measurement of energy using 1phase energy meter connection. These mid meters are all compact and lightweight and rated as class 1 and 2, so you can rely on electricity meter accuracy. The total energy is the sum of the reading of both the elements. Level of automation achieved and lists of areas where manual processing exists. The construction of the single phase energy meter is shown in the figure below. Presented here is a simple energy meter using analog devices ade7757 chip for single phase, 2wire phase and neutral systems used in households. Mqxenabled mcf51em256 singlephase electricity meter reference design, rev. The single phase electrical energy meter principle block diagram is. Therefore, this type of meter is also called an integrating meter.
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