What are the advantages and disadvantages of usual energy meters. Here we are going to discuss the singlephase induction type in detail. There is a copper shading ring at the central limb of the shunt magnet. Experiments for first year electrical engg lab 201415 dept of electrical engineering, shri ramdeobaba college of engineering and management, nagpur 4400 india page 4 on lhs by hand with pencil experiment no. Single phase induction motor double revolving field theory the threephase induction motor starting torque inversely depends on the slip this implies that a small positive slip 0. Dc pmmc instruments, extension of range by shunts and multipliers. Presented here is a simple energy meter using analog devices ade7757 chip for singlephase, 2wire phase and neutral systems used in households. Singlephase induction kilowatt hour meter singlephase induction kilowatt hour meter construction bipul raman overview of single phase induction type energy meter single phase induction type energy meter is also popularly known as watthour meter. The ade7752b specifications surpass the accuracy requirements as quoted in the iec6205321 standard. Potentiometer calibration of pmmc ammeter and pmmc voltmeter 4. A singlephase energy meter prototype has been implemented in the lab to. The following experiments are required to be conducted as compulsory experiments.
Give the connections as per the circuit diagram above. Single phase energy meter free download as word doc. Principle of generation thermal, hydel and nuclear. What is the solution for the drawbacks of commonly used energy meters. Energy meter circuit detailed project with source code. The complete set up consists of two energy meters, wattmeter, voltmeter, ammeter, variac.
These graphics below shows the above idea in a very simple way. 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 power measurement instruments are made up of rugged electronic instruments designed specifically for use in the harsh electrical environment common to many utility and industrial applications. Calibration of single phase energy meter using phantom loading method with rss meter as standard 2.
To determine regulation and efficiency of a single phase transformer by open circuit o. Grid meter, and used as control input for an ess system 1. Can you guys suggest some microcontroller for this project. Procedure for calibration and testing of singlephase energy meter. Figure 3 shows a simple capacitor power supply for a single output voltage of 3. The main objectives of this lab course are i to expose the. Calibration and testing of single phase energy meter aim. These mid meters are all compact and lightweight and rated as class 1 and 2, so you can rely on electricity meter accuracy. It is used in domestic and industrial ac circuit for measuring the power consumption. A single phase microcontroller based energy meter conference paper pdf available in conference record ieee instrumentation and measurement technology conference 2.
I am currently studying msp430afe2xx from texas instrument, any pointers for this ic. A triple singlephase circuit can be represented in two ways see figures 3 and 4. 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.
Measurement of energy using 1phase energy meter connection. The commercial unit of electrical energy is kilowatt hour kwh. Single phase vs three phase electricity meter help. 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. The individual pulses are then summated through the use of an electromechanical meter, and are made available at a pulse output as well. Single phase induction kilowatt hour meter construction. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. The meter which is used for measuring the power of three phase supply is known as the three phase energy meter.
Power and energy measurements encyclopedia of life. Measurement of 3 phase reactive power with single phase wattmeter. Experiments for first year electrical engg lab 201415. The red wire shows the live or line or phase and the blake shows the neutral wire. The meter complies with national and international metering standards. Single phase energy meter electric current voltage scribd. The electricity meters in our single phase meter range are all mid approved meters. Implementation of a singlephase electronic watthour.
An adjustable copper shading rings are provided on the central limb of the shunt magnet to make the phase angle displacement between magnetic field set up by shunt magnet and supply voltage is approximately 90 degree the copper shading bands are also called the power factor compensator or compensating loop. Pdf a single phase microcontroller based energy meter. This article focusses only on its constructional features and its working. Energy is the total power consumed over a time interval. Calibration and testing of single phase energy meter. Pic18f87j72 singlephase energy meter calibration users guide 2011 microchip technology inc. Energy meter is an instrument which measures electrical energy. We cannot think of life without electricity and when there is electricity consumption there is a need to measure its consumption. Electrical energy meters principles and applications. How electricity reaches our homes from the power station. Single phase electricity meters gas meters energy meters. Ti designs isolated communications between metrology afe. To demonstrate the operation of a single phase watthour meter under different loading conditions.
Study of single phase induction type energy meter or watt. Energy conservation is a primary goal for lawmakers today. But these are now being gradually replaced by electronic digital energy meters. One single phase energy meter, one single phase load, stop watch and connecting wires. The measurement of energy is accomplished by means of a voltagefrequency converter connected downstream from the power meter. Single phase electricity explained wiring diagram energy. Singlephase electric meter with isolated energy measurement ti designs design features ti designs provide the foundation that you need simplified meter calibration by using usb including methodology, testing and design files to connection quickly evaluate and customize the system. A 3phase energy meter can interface with different. Therefore, this type of meter is also called anintegrating meter. To study the construction and working of single phase energy meter and to find out energy consumed in 30 minutes. In every residence, malls, industry, everywhere energy meters are used to measure the electrical energy consumed. 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. Mechanism of rotation of an aluminum disc which is.
Calibration of single phase energy meter using phantom loading method with rss meter as standard. For this reason they can allow a power flow three time greater then the corresponding singlephase circuit. Manufacturer of energy meter testing equipment single phase high precision reference meter, three phase energy meter field calibrator, ratio and polarity test set and single phase portable energy meter testing equipment offered by akshyan power solutions private limited, delhi. Induction type energy meter essentially consists of following components. In this video we learn electrical engineering basics by learning single phase meter wiring diagram. C to the pressure coil circuit by means of phase shifting transformer. The meter is designed to offer reliable energy measurement in single phase circuit and is highly suitable for metering and remote communication purposes. The energy is the total power consumed and utilised by the load at a particular interval of time. To calibrate and test the given single phase energy meter by direct loading. However the meter should withstand the maximum system voltage.
Overview of single phase induction type energy meter. Single phase energy meter on sales quality single phase. Triple singlephase system built using three separate singlephase systems six conductors figure 4. Below are the the connections diagrams for installation of a singlephase 3phase, 4 wire kwh meter digital or analog energy meter from the supply to the main distribution board in home. Electrical measurements lab manual pdf em lab manual pdf. No name type range quantity 1 single phase energy meter induction 1500revkwh 1 2 wattmeter upf 300v5a 1. Ade7752b 3phase, 3wire, and 4wire energy metering ic. Calibration and testing of singlephase energy meter. This document is the manual for the single phase max 100 a energy meter. Experiment no 1 power measurement in balanced 3 phase circuits and power factor improvement 1 power in single phase circuits let v vm cos. Working of single phase induction type energy meter. Electromechanical energy meters have been the standard for metering the electricity since billing began. Pdf this paper presents a single phase electrical energy meter based on a. The single phase electrical energy meter principle block diagram is shown in fig.
Single phase energy meter working of single phase induction. 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. The main objectives of this lab course are i to expose the students. This article is only focused about its constructional features and.
The only analog circuitry used in the ade7752b is in the. And also for reading the current ct is used which is inductive and current will lag. 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 2wire 12 % 1 100% in 01 % 1 10% in 01 2 load curve effect on load curve by varying the voltage. The power consumed over a period of time can be measured by a motor meter or energy meter. It comes with suitable display with a range of communication options for local and remote monitoring. Single phase induction type energy meter is also popularly known as watthour meter.
Measure reactive power in 3phase circuit using single wattmeter. Energy meters are used in all power supply lines to every house in order to measure the power consumed in both dc and ac circuits. I am starting a project for single phase energy meter reading. Ip65 durable waterproof single phase electrical energy meter, residential power monitor quick detail. Direct connection, either using the rs485 to usb interface with 1. The basic working of single phase induction type energy meter is only focused on two mechanisms. Induction type energy meter used invariably to measure the energy consumed in any a. 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. A singlephase meter is used in alternating current systems. Note down the reading of two meters in a given period of time, say 2 minutes. To calibrate the energy meter using direct loading. Portable energy meter calibrator available including three phase, single phase meter test equipment. Single phase digital energy meter all about circuits.
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