Introduction to Measurement of Power:
In a DC (direct current) circuit: The power in DC circuit is provided by P = V * I,
In which V stand for = Voltage
I stand for = current.
The power can be calculated basically with the help of just Ammeter and voltmeter. The below diagram shows the circuit diagram for measuring power in DC (direct current) circuit.
Diagram - Voltmeter - Ammeter method
Total power (P) = Voltmeter meter reading * Ammeter reading
In 1-phase AC circuit:
Power in 1-phase AC circuit is provided by P = VICosφ,
In which,
V stands for Voltage,
I stands for current and,
Cos φ stands for power factor.
Wattmeter is employed to calculate power in AC circuits. The circuit diagram is displayed in the diagram below.
Diagram - Power measurement in 1-phase AC circuit
Total power (P) = Wattmeter reading = VI Cos φ.
From this power factor can be measured as follows
Cos φ = P/ VI
3-phase AC circuit:
1) One wattmeter method:
Diagram - Single wattmeter method of power measurement in 3-phase circuit
For balanced 3-phase load that is ZR = ZY = ZB, single wattmeter might be connected into any one phase as displayed in the above diagram. This wattmeter will point out the power in that phase only. Because the load is balanced, the entire power in the 3-phae circuit will be calculated by
Total power = 3 *Wattmeter reading
ii) Two-wattmeter method:
This is most the general method for calculating power in a 3-phase, 3-wire system because it can be employed for both unbalanced loads (ZR ≠ ZY≠ ZB) and balanced (ZR = ZY = ZB) connected in either star/delta. The current coils are connected to any two of the lines, and the voltage coils are connected to another line, the one with no current coil connection, as displayed in the below diagram.
Total power = W1+ W2
Diagram - Two wattmeter method of power measurement in 3-phase circuit
iii) Three-wattmeter method:
If the load is unbalanced and the installation is 4-wire, after that 3 wattmeter are essential. The connection of wattmeter is displayed in the below diagram. Each wattmeter calculates the power in one phase and the total power will be calculated by
Total power = W1 + W2+ W3
Diagram: Three wattmeter method of power measurement in 3-phase circuit
Latest technology based Electrical Engineering Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Measurement of Power homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Measurement of Power, project ideas and tutorials. We provide email based Measurement of Power homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Measurement of Power. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Electrical Engineering homework help and assignment help services. They use their experience, as they have solved thousands of the Electrical Engineering assignments, which may help you to solve your complex issues of Measurement of Power. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
tutorsglobe.com roman history and law assignment help-homework help by online history tutors
Demography tutorial all along with the key concepts of Methods of data collection, Direct data, Indirect methods, Science of population and size of population
Hydrometallurgy tutorial all along with the key concepts of meaning of hydrometallurgy, Processes of Hydrometallurgy and Advantages of Hydrometallurgy
tutorsglobe.com nuclear energy assignment help-homework help by online energy crisis tutors
Crystal classification tutorial all along with the key concepts of Fundamental types of lattices, Direction indices, Miller indices, Determination of Miller Indices, Principles of Miller Indices
Variation in plants and animals tutorial all along with the key concepts of introduction to genetics, Genetic variation and How genes determine sex,
Air Pollution tutorial all along with the key concepts of Air Pollution-Past, Present and Future, Major Air Pollutants-their sources, Ozone, Carbon monoxide, Airborne carcinogens, Hydrocarbons, Cigarette smoking
tutorsglobe.com process of seed germination assignment help-homework help by online reproduction biology tutors
Empirical Formula of an Oxide tutorial all along with the key concepts of theory of chemical formula, Determination of the empirical formula, Concept of the experiment-empirical formula, Procedure-empirical formula of an oxide
www.tutorsglobe.com offers online biochemical engineering assignment help - biochemical engineering homework help, projects help, biochemical engineering courses, online tutoring and answering questions by live tutors.
tutorsglobe.com paediatrics aids assignment help-homework help by online hiv tutors
tutorsglobe.com pathogenicity and clinical manifestations assignment help-homework help by online leishmania tutors
tutorsglobe.com function of finance department assignment help-homework help by online financial management tutors
Geometric and Wave optics tutorial all along with the key concepts of Law of reflection, Law of refraction, Limitations of Geometrical Optics, Brewster's angle, Total internal reflection, Dispersion, Diffraction, Young's Double-Slit Experiment, Polarization
theory and lecture notes of solving equations algebraically all along with the key concepts of quadratic equations, factoring, extraction of roots, completing the square, quadratic formula, polynomials of higher degree and position equation. tutorsglobe offers homework help, assignment help and tutor’s assistance on solving equations algebraically.
1960395
Questions Asked
3689
Tutors
1485969
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!