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