Designing a threephase electronic multifunction energy meter with high. If energy be supplied to any system of conductors through n. Single phase energy meter with capacitorbased power supply application circuit. It is a type of polyphase system and is the most common method used by electrical grids worldwide to transfer power. Alpha meter il424001s 8 4 wire delta meters circuit closing device 1 2 3 n 3 2 1 n form 10s form 8s application 3 phase, 4 wire delta, 3 cts, no pts 20e01 wiring is different than a traditional form 8 meter form 10a form 8a application 3 phase, 4 wire delta, 3 cts, no pts 23e01 1 2 3 n 3 2 1 n wiring is different than a traditional form 8. A novel isolated adc architecture has been presented.
Three phase submeters these three phase submeters are designed to provide accurate consumption data to help facility managers get a control on electrical costs. W p t delta voltage neutralpoint displacement voltage. Figure 3 shows a simple capacitor power supply for a single output voltage of 3. Feb 18, 2018 this has improved the lighting but theres still a gap which will cause a flicker so we can add in a third set of coils or a third phase and this will mean that one of the lamps are almost always at its maximum brightness so the lighting is nearly constant. Design and implementation of smart three phase energy meter. The meter which is used for measuring the power of three phase supply is known as the three phase energy meter. See pages 121 through 124 for service center locations. Energy meter circuit detailed project with source code. If this works ok, plan to build another box with 3 meters in it.
Electric utilities use electric meters installed at customers premises for billing and monitoring purposes. Mounts using two retainer clips, no tools required. A single phase load can be powered from one leg of the 3 phase source. The current in each conductor is 1 3 cycle out of phase with the other two. Nov 23, 2015 dear sir, hi, thank you for your good instructions and drawings, i have a problem as follows.
One meter for the 240v and 2 meters for each side of the 120v. For active energy metering with ct connection with dual tariff management. Also, the passive components of the voltage and current input circuit may. Single phase loads can be connected between one phase and the neutral or between two phases. The total energy is the sum of the reading of both the elements. The minimum time test limit shall be as per is 7791999. Facilities instructions, standards, and techniques volume 310.
The revision of this book was made possible due to the suggestions and efforts of many employees. Three phase electric power is a common method of alternating current electric power generation, transmission, and distribution. Ic energy meter 1 phase 24qfn 4,000 immediate available. Three phase energy meter whole current meter or tri vector meter. Hxe34kp three phase four wire prepaid keypad meter is designed for the purpose of prepayment. Article 418 meter installation 320a meter can page 52. Handbook on electricity meters asiapacific economic cooperation. Implementation of a singlephase electronic watthour. A singlephase watthour meter is es sentially an induction motor whose speed is directly proportional to the voltage. Triple single phase circuits and three phase circuits 2.
An electricity meter, electric meter, electrical meter, or energy meter is a device that measures the amount of electric energy consumed by a residence, a business, or an electrically powered device electric utilities use electric meters installed at customers premises for billing and monitoring purposes. In each case, the top line displays phase 1 and phase 2 s measurements and the bottom line displays phase 3 s measurements. Free online calculation of electrical power and energy. Upon startup, youll see a 3 phase energy meter screen followed by cycling through the current, power, maximum power and kilowatt hours consumed screens.
Threephase electric power is a common method of alternating current electric power generation, transmission, and distribution. More specifically, it is a threephase circuit, the kind used predominantly in large power distribution systems. Would you please send me the circuit diagram of your energy meter using ade7753. Pdf a single phase microcontroller based energy meter. Revised illustration a and b 3 phase3 wire service add grounded conductor. Accuenergy acuvim ii series of intelligent powerenergy meters. As a rule, delta voltage is used for the calculation of values in threephase systems. The energy is the total power consumed and utilised by the load at a particular interval of time. All power measurements are taken in the digital domain. This has improved the lighting but theres still a gap which will cause a flicker so we can add in a third set of coils or a third phase and this will mean that one of the lamps are almost always at its maximum brightness so the lighting is nearly constant. Since its foundation in 2000 selec has become the market leader for timers, counters and temperature controllers in india.
The service configuration begins as a single phase 3wire service. The mc9s08gw64 is a lowpower mcu suitable for a singlephase energy metering application. The proposed system presents a total electronic three phase four wire energy meter. Three phase ctpt operated keypad energy meter 10 shenzhen inhemeter co. 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.
Remote terminal unit rtu for data acquisition and integrated utilities metering. Multi circuit energy meters schneider electric digest plus. Circuit wires 1s, 1a sc 1 1 2 2s, 2a sc 1 2 3 3s, 3a tr 1 1 2 4s, 4a tr 1 2 3 5s, 5a tr 2 2 3 or 4 35s, 35a tr 2 2 3 45s, 45a tr 2 2 3 or 4. Threephase electrical power addresses all aspects of threephase power circuits. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. Mcp3909rd3ph3, mcp3909 and dspic33f 3 phase energy meter reference design is a fully functional energy meter with many advanced features such as harmonic analysis, per phase distortion information, sag detection, four quadrant energy measurement and active and reactive power calculation. Dear sir, hi, thank you for your good instructions and drawings, i have a problem as follows. Electrical energy meters principles and applications. Integrates modbus device data to iec 61850 protocol for accurate data. Single phase digital energy meter all about circuits. Neither the angle between phases, nor phase rotation, counts. Purpose the user manual contains all the information required for application of the meters for.
Here phase lines r,y,b are given to the current transformer ct and other end given to the load terminal. Their assistance and support is acknowledged and appreciated. These readings are transmitted to the mobile of user via. Designed for normal 230v ac and maximum line current of 30 amps 3. Certified to mid directive module b and module d of annex ii. Reproduction of significant portions of ti information in ti data books, data. Simply add a single device with common voltage inputs and communication interface that can measure the current, voltage, power, energy consumption, and total harmonic distorion thd of up to 14 3phase circuits with a single board or up to 28 3phase circuits with a two board configuration. The torques from the 3 phases add mechanically and so record the arithmetic sum of energy across the 3 phases. When the voltage of 120% of rated voltage is applied with no current flowing in the circuit, the test output of the meter shall not produce more than one pulsecount. Use them for tenant submetering, net metering, and data center monitoring. This meter is available separately or as part of a square d integrated power center ipc for use in building retrofits or new construction. Circuit wires 1s, 1a sc 1 1 2 2s, 2a sc 1 2 3 3s, 3a tr 1 1 2 4s, 4a tr 1 2 3. It uses ad7755, a singlephase energy measurement ic to acquire and process the input voltage and current parameters. It is also used to power large motors and other heavy loads.
An electric circuit is a closed loop with a continuous flow of electric current from the power supply to the load. A shunt can be used for the currentsensing element. Pt total power of the circuit in watt w p1, p2, p3 power of phase 1, phase 2 and phase 3 in watt w v voltage in volt v exemple. Idea in brieftraditional threephase energy meters use current transformers cts to sense.
The blue book revision committee for the 2017 edition consisted of the following employees. It is the policy of the company to serve all its customers in an orderly. Three phase energy meter with backlit lcd display integrated touch keypad. Here are ten simple electric circuits commonly found around the home. They are typically calibrated in billing units, the most common one being the kilowatt. Its main functions include energy measurement, data display, communication, prepayment, contactor control, keypad input and inquiry, antitampering, etc. Each compact multipoint meter provides energy measurement for up to 24 1ct or 12 2ct singlephase circuits or 8 3ct 3phase circuits. Threephase ctpt operated keypad energy meter operation manual. The three phase energy meter is used for measuring the large power consumption.
Working on a 240v meter in a box which i will have done soon to test my amateur radio linear amplifier. It is used in domestic and industrial ac circuit for measuring the power consumption. Phase angle between the respective voltage and current phase modbus rtu protocol, rs485 communication port for integration with energy management systems dm6200h main characteristics easy to install. Standard for electric installation and use xcel energy. This arrangement produces a smoother power flow and permits lower line voltages. May 02, 2020 a 3 phase power source would not normally be converted to single phase. 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. At typical facilities where electrical power is used, the book covers the important topics of grounding, currents, power, demand, metering, circuit protection, motors. An electricity meter, electric meter, electrical meter, or energy meter is a device that measures the amount of electric energy consumed by a residence, a business, or an electrically powered device. Reproduction of significant portions of ti information in ti data books or data sheets is. 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. It is capable of running on a capacitive power supply.
But still in the meter circuit i wonder what is the need of shorting m1, m2, m3 terminals with neutral line. Can read up to 999999 units kwh with a resolution of 0. Power monitoring and control schneider electric global. Three phase electricity explained the engineering mindset.
There is a copper shading ring at the central limb of the shunt magnet. The mc9s08gw64 is a lowpower mcu suitable for a single phase energy metering application. Delta voltage and neutralpoint displacement voltage can be derived from one another using a factor of v3. A ferraris 3phase meter has 3 discs mounted on a common shaft and 3 pairs of voltage and current coils. How to distribution board wiring for single phase wiring with dp mcb, sp mcb, earth, voltmeter, ammeter for home wiring in the above diagram i shown the complete method of wiring, i wired an energy meter after that a double pole and then single pole breakers for each room or each point of circuit load. Phase voltage and power and total power of a three phase system 2. V1230 v in 400 v three phases circuit i1, i2, i3 current of phase 1, phase 2 and phase 3 in ampere a cos. A 3 phase power circuit consists of three conductors of alternating current combined into a single power line. Below is the most common inner connection of of 3 phase energy meter. Electrical and electronics engineering and technology. If meter is moved or modified, it needs to be brought up to current company standards. Implementation of a lowcost threephase watthour meter using. Powerlogic em4900 series multicircuit meters schneider. Mcp3909 3phase energy meter reference design using.
In a fourwire, 3 phase system, the fourth wire acts as the neutral conductor. Compact meter with 49 mm meter depth behind the panel, connectable up to 480 v. Effective date april 15, 2015 3 introduction xcel energy is dedicated to providing safe, economical, and reliable service to its customers. V1230 v in 400 v threephases circuit i1, i2, i3 current of phase 1, phase 2 and phase 3 in ampere a cos. Intelligent, webenabled, programmable rtu perfect for the combined metering of water, air, gas, electricity and steam.
It samples those readings averages them and calculates the energy consumed in kwh. It is also used to power large motors and other heavy loads a threewire threephase circuit is usually more economical than an equivalent twowire. Finally plan to test the 120v meter on my honda 6500w generator which outputs 30a at 240v on one of the connectors. It uses powerful 16bit dspic33f microcontroller unit mcu. Singlephase energy meter with capacitorbased power supply application circuit. Morning group 3 phase lcd digital display current voltage multifunction energy power panel meter with rs485 modbus communication for distribution box3d3ypanel size. 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. Energy meters can be used as part of an ac power system to monitor threephase electrical wiring configuration. Since the voltage sources are all at different phase angles in this case, three different phase angles, this is a poly phase circuit. The book treats the transmission of electrical power from the common sources where it is generated to locations where it is consumed. The three phase meter is constructed by connecting the two single phase meter through the shaft. Electric circuits like ac lighting circuit, battery charging circuit, energy meter, switch circuit, air conditioning circuit, thermocouple circuit, dc lighting circuit, multimeter circuit, current transformer. Electric service rules issued jan 2020 page ii table of contents esr revision date.
Electrical and electronics engineering and technology tutorials. Bruce arnette mike cole walter moye bill baber steve gallahan harold parker. Circuit diagram of an electronic energy meter hi all. Two and threeelement meters are simply two or three single elements having a common shaft and register, which serve to totalize the energy measured by each element. This article is really good kurrey consultancy services november 25, 2018 at 2. Each compact multipoint meter provides energy measurement for up to 24 1ct or 12 2ct single phase circuits or 8 3ct 3 phase circuits. And for energy in threephase systems the following. Below is the connection of 3 phase three phase or poly phase 3 phase,4 wire kwh meter digital or analog energy meter from the supply to the main distribution board. A digital energy meter steps down the mains and measures the instantaneous values of current and voltages simultaneous through adc. Hi pranam as you said input phase terminals are connected to m1, m2, m3 and m0 and the load terminals to l1, l2, l3 and l0.
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