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3. Measurement of Electric Power (11 M)

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Wattmeter

Wattmeter are used for measuring Electric Power

Following are types of wattmeter :

  1. Electrodynamometer Type (Dynamometer )
  2. Induction Type

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Dynamometer Wattmeter

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Working principle �Interaction of magnetic flux between Two coils produces a for e on moving coil

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Working of Dynamometer Wattmeter

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Errors in Dynamometer Type Wattmeter �and their Compensations

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Errors in Wattmeter and the method for overcoming such type of errors: and (their Compensations)

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Active and Reactive power measurement- one, Two and Three Wattmeter methods

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Maximum Demand Indicator

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4-Quadrant Meter

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