Monday, 9 February 2015

Wattmeter ppt

MEASUREMENT AND INSTRUMENTATION ppt. WATTMETER METHOD Prepared By A. SRAVANKUMARREDDY (11B91A04A5) -R. The wattmeter is an instrument for measuring the electric power or the supply . Instantaneous and Average Power in BTP Circuits.

The total average power delivered to the balanced.

Electrical And Electronics Instruments.

ELECTRICAL AND ELECTRONICS INSTRUMENTS. Principle and types of analog voltmeters. Single and three phase wattmeter. Learn new and interesting things. Get ideas for your own presentations.


The Three- wattmeter method can be used for star and delta . University of Engineering and Technology, Laho. The current coils connected in series with the circuit, while the potential coil is connected in parallel. The electrodynamic wattmeter , shown in figure 3-1 uses the reaction between the magnetic fields of two current-carrying coils (or sets of coils), one fixed and the other movable. Measurement of three-phase power with the 2- wattmeter method.


The connection diagram for two- wattmeter metho along with the relevant phasor diagram for balanced loa is described. Wattmeter - How it Works, Phas. Keywords: power measurement, two- wattmeter metho balanced and unbalanced . The torque on each element is proportional to the power being measured by it.


These instruments are similar in design and construction to electrodynamometer type ammeters and voltmeters. The two coils are connected in different circuits for measurement of power. The fixed coils or “field coils” arc connected in series with the load and so carry the current in the circuit. Essential Requirement of Indicating Instruments 1. Spring Control method ii Gravity control method 3. Damping torque or restoring torque i. This application note will explain the difference between the two, where each method can and cannot be use the advantages of each and describe how the use of two .

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