effect of temperature on the registration of single phase induction Watthour meters

by Knight, Abner Richard.

Publisher: University of Illinois in Urbana, Ill

Written in English
Published: Pages: 26 Downloads: 250
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  • Watt-hour meter.

Edition Notes

Bibliography: p. 24.

Statementby Abner R. Knight and Max A. Faucett.
SeriesUniversity of Illinois bulletin ;, v. 23, no. 21
ContributionsFaucett, Max Albert, 1899-
LC ClassificationsTK35 .K55
The Physical Object
Pagination26 p.
Number of Pages26
ID Numbers
Open LibraryOL178809M
LC Control Numbera 26000156

  Single Wattmeter Method; In this post, we will discuss the Two Wattmeter Method for power measurement. Two Wattmeter Method: In two wattmeter method, a three phase balanced voltage is to a balanced three phase load where the current in each phase is assumed lagging by an angle of Ø behind the corresponding phase voltage. Such a sleeve has a substantial negative temperature coefficient of permeability over the range of temperatures to which watthour meters are normally subjected in operation. In order to improve the efficiency of the watthour meter a soft magnetic tongue 61 is located intermediate the pole faces of the current po 19 with its upper face in. The ac motors are classified as single and 3 phase induction motors, synchronous motor and some special purpose motors. Out of all these types 3 phase induction motors are widely used various industrial applications. The important advantages of 3 phase induction motors over other types are self starting property, no need of. Components of Watthour Meters; Current, Voltage, and Power in AC Circuits; Types of Circuits and Their Measurements; Adjustments and Compensation of Meters; Use of Current and Potential Transformers; Register Constants and Multipliers; Meter Mountings and Service Connection Diagrams. PART 2 (B).

Introduction, Blodel’s Theorem for N-Phase P-Wire System, Measurement of Power in Three Phase Balanced and Unbalanced Systems, Three Wattmeter Method, Two Wattmeter Method, One Wattmeter Method, Measurement of Reactive Volt Amperes, Single Phase VARmeter, Polyphase Varmeter, Reactive Power Measurement in Three Phase Circuit, Three Phase. Course #: A-B Duration: 20 hours Course Prerequisites: Analog Circuit Measurement (Block A23); Introduction to Algebra, Geometry, and Trigonometry (Block X02); What Students Learn: PART 1 (A). Components of Watthour Meters; Current, Voltage, and Power in AC Circuits; Types of Circuits and Their Measurements; Adjustments and Compensation of Meters; Use of Current and Potential. The current coil of each wattmeter carries the current of one phase only and the pressure coil measures the phase voltage of the phase. Hence, each wattmeter measures the power in a single phase. The total power in the load is given by the algebraic sum of the readings of the three wattmeters. P = . Energy Meter. This shows the amount of power (electric energy) used over a certain period. In a watthour meter, there are two sets of windings.. One is the voltage winding while the other is the current winding. The field developed in the voltage windings causes current to be induced in an aluminum torque produced is proportional to the voltage and current in the system.

  5. Conclusions. This paper presents a new method for testing the full load temperature rise of three phase induction motors. The method is simply to connect the motor under test while it is unloaded to a supply of voltage higher than the rated voltage of the motor by about 20%. Another interesting result is that now at T = K, we still have a considerable amount of conversion. Thus, although the temperature is so low to start with, the temperature will eventually increase to K, which increases the reaction rates. Contrast to the trend in the conversion, the selectivity decreases with increasing temperature. A single phase induction motor is drawing 10 amps at volts. If the operating power factor of the motor is , then the power drawn by the motor is a) kW b) kW c) kW d) kW The quantity of heat required to raise the temperature of 1 gram of water by 1 OC is termed as. Modern electricity meters operate by continuously measuring the instantaneous voltage and current and finding the product of these to give instantaneous electrical power which is then integrated against time to give energy used (joules, kilowatt-hours etc).The most common type of electricity meter is the electromechanical induction meter. This consists of an aluminium disc which is acted upon.

effect of temperature on the registration of single phase induction Watthour meters by Knight, Abner Richard. Download PDF EPUB FB2

Regularly checking the operating temperature of each critical motor will pay dividends. I t is no secret that heat kills electric motors.

But it is easy to forget that exceeding the rated operating temperature by as little as 10 C (18 F) can shorten the life of a three-phase induction motor by half.

Induction meters. Inthe Italian Galileo Ferraris ( ) made the key discovery that two out-of-phase AC fields could make a solid armature like a disc or cylinder rotate. Independently the Croatian-American Nikola Tesla ( ) also Author: Smart Energy International. Effect of temperature on the registration of single phase induction watthour meters: Author(s): Knight, Abner Richard; Faucett, Max A.

Subject(s): Watt-hour meter: Issue Date: Publisher: University of Illinois at Urbana Champaign, College of Engineering. Engineering Experiment Station. Series/Report: University of Illinois. Engineering. THE EFFECT OF TEMPERATURE ON THE REGISTRATION OF SINGLE PHASE INDUCTION WATTHOUR METERS 3iY ABNER R.


Effect of temperature on the registration of single phase induction watthour meters. By Abner Richard Knight and Max A.

Faucett. Abstract. Cover ed as part of an investigation conducted by the Engineering Experiment Station, University of Illinois at Urbana-ChampaignAuthor: Abner Richard Knight and Max A. Faucett. Single-phase induction kilowatt hour meter - Construction. An adjustable effect of temperature on the registration of single phase induction Watthour meters book 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. Induction Type Single Phase Energy Meters.

These are, by far, the most common form of A.C. meters met with in every-day domestic and industrial installations.

These meters measure electric energy in kWh. The principle of these meters is practically the same as that of induction watt meters. Get this from a library. The effect of temperature on the registration of single phase induction Watthour meters.

[Abner Richard Knight; Max A Faucett]. This paper presents a single phase electrical energy meter based on a microcontroller from Microchip Technology Inc. PIC family. This electronic meter does not possess any rotating parts, and the. ⇒ The stator of phase shifting transformer for use in conjunction with an A.C.

potentiometer usually has a single-phase winding two-phase winding three-phase winding any of the above ⇒ In ____ instruments the deflecting torque depends on the frequency.

induction type hot wire moving coil moving iron. An electric energy meter includes a mutual inductance current transducer formed by primary winding means for direct connection to the current component of an electric energy quantity to be measured.

Secondary winding means is inductively coupled to the primary winding means to produce an analog signal that is proportional to the time derivative of the current component. The results of a load research study show that watthour meters spend a great deal of time at light loads.

A method was developed to establish at which loads watthour meters register energy consumption. Watthour meters spent 85% of the time and registered more than 40% of the total energy for a one year period at light loads. In the induction type single phase energy meter, the flux produced by shunt magnet (pressure or voltage coil current) Φ sh lags behind the applied voltage V by almost 90°.

The flux φ se is produced by the load current I and se Φ is in the direction of I (see Fig). In here we have discussed on some basic information regarding the effect of temperature in electrical motor and we are the plan to discuss more information and features of it in near future.

Previous Article Three Phase Induction Motor Breaking Methods (3 Types) Next Article How to Synchronize Synchronous Motors and Generator to Power System. The principle of working and construction of induction type meter is very simple and easy to understand that’s why these are widely used in measuring energy in domestic as well as industrial world.

In all induction meters we have two fluxes which are produced by two different alternating currents on a metallic disc. Due to alternating fluxes there is an induced emf, the emf produced at one.

Phase 1 D3 DC Output Voltage Regulator +-Var 3 C out D z D2 R1 D1 R2 C1 C2 L3 L1 L2 L4 1 2 Phase Phase 3 IN OUT Fig.

Capacitor power supply. the time it remains operational upon a power failure. At the startup, the largest C inis, the longest it will take for the supply to be fully operational.

On the other hand, the value of C out. CENTRON® OpenWay™ Meter Technical Reference Guide 59 Operation: CVSO OpenWay Register Meter Single Phase Test Constants (SPTC) Form 9 or 16 3Ø, 3W, 9, 16, or 14 3Ø, 4W, wye Series A Phase Only B Phase Only C Phase Only This test method is valid for kWh, kVAh, kvarh, kW, kVA, and kvar at any load or power factor.

An illustration of an open book. Books. An illustration of two cells of a film strip. Video. An illustration of an audio speaker. Audio. An illustration of a " floppy disk. Software. An illustration of two photographs. Full text of "The Watthour Meter".

Buy AS Electricity metering Portable alternating current rotating standard watthour meters from SAI Global. Its capability and accuracy have been verified by comparing experimental and computation results for typical single-phase and three-phase induction watthour meters.

Read more Article. This specification covers the design, manufacture testing, supply and delivery of single phase 2 wire Amps Static Watt hour meters of class: accuracy. STANDARDS IS:IEC& CBIP Technical report no and its latest amendments along-with BSES specifications.

Watthour meters ⇒ In a 3-phase power measurement by two wattmeter method, both the wattmeters had identical readings. heating effect magnetic effect electro-magnetic induction none of the above ⇒ An ammeter is a ⇒ Induction type single phase energy meters measure electric energy in.

An illustration of an open book. Books. An illustration of two cells of a film strip. Video. An illustration of an audio speaker.

Audio. An illustration of a " floppy disk. Full text of "IS ac Static Transformer Operated Watthour and Var-hour Meters, Class S and S". Energy meters are the basic part to measure the power consumption. It is used everywhere, no matter how big or small consumption it is.

It is also known as watt-hour meter. Here we discuss the construction and working principle of induction type energy meter. To understand the structure of watt-hour. Three Phase Induction Motors: Types, Construction and principle of operation, 3 phase Induction Motor, general phasor diagram, equivalent circuit, power and torque relations, condition for maximum torque, circle diagram, Performance characteristics, effect of rotor resistance on speed torque characteristics, stable & unstable region of.

Single-phase induction motors have a copper or aluminum squirrel cage embedded in a cylinder of steel laminations, typical of polyphase induction motors.

Permanent-Split Capacitor Motor. One way to solve the single phase problem is to build a 2-phase motor, deriving 2-phase power from single phase.

Page - During the time when energy is being delivered to the circuit, the product of voltage and current is positive; that is, the voltage and the current have the same sign. When either voltage or current is reversed with respect to the other so that this product is negative, power is being returned by the circuit to the source, and is then reckoned as a negative.

induction type single phase energy meter: Induction type instruments are used for a. measurements. the induction principle find its widest application as an energy meter. Induction type energy meter used invariably to measure the energy consumed in any a.c.

circuits in a prescribed period where supply voltage and frequency are constant. T.1 Describe fully the construction and principles operation of a single phase, induction type watt-hour meter, and explain the adjustments usually provided. [10] T.2 State all possible source of errors that are involve in watt-hour meter and show how these are minimized in practice.

[10]. Power Supplied by a Complex Wave-Harmonics in Single-phase A.C Circuits-Selective Resonance Due to Harmonics-Effect of Harmonics on Measurement of Inductance and Capacitance-Harmonics in Different Three-phase Systems-Harmonics in Single and 3- Phase Transformers-Objective Tests.

Page 55 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10" units of resistance of the CGS system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, grams in mass, of a constant cross-sectional area and of the length of centimetres.

Induction heating is a popular method used for heating in metal processing. It is used both for melting induction furnaces, and pre-heating before plastic working or heat treatment [1–3].The method has become so popular due to its heating nature because the heat is emitted directly inside the heated charge and it is not transferred through the surface.USA USA USA USA US A US A US A US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords lag current potential plate flux Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.