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vector Lecture on Power Consumed in Three Phase Circuits of Chapter Three Phase Circuits of Subject Basic Electrical Engineering for First-Year Engineering Students. To Access Complete Course of vector Lecture on Power Measurements & Wattmeter Connections of Chapter Three Phase Circuits of Subject Basic Electrical Engineering for First-Year Engineering Students. To Access Complete Course Experiment no 1 Power measurement in balanced 3 phase circuits and power factor improvement 1 Power in Single Phase Circuits Let v Vm cos(t) p p 2V cos(t) is the voltage applied to a R-L circuit and i Im cos(t ) 2I cos(t ) is the current owing in it (V and I are the rms values of the voltage and current respectively). The power at any instant of time is

The two wattmeter method of power measurement in three phase circuits is suitable for every type of three phase circuit weather circuit is balanced or unbalanced and star connected or delta connected. Variation in Wattmeter Reading Power Factor (lagging) In two wattmeter method readings of both wattmeters depend on power factor of load. Effect The use of a single three-phase wattmeter rather than the use of three single-phase watt-meters would generally be a more practical means to measure circuit power of a three-phase three-wire circuit. Although the power of a balanced three-phase three-wire circuit can be measured with a single current measurement unbalanced circuits require a All the three methods of measurement of power in 3-phase ac circuits. 321--watter methods explained. Slideshare uses cookies to improve functionality and performance and to provide you with relevant advertising.

Now we will explain the measurement three-phase power measurement using three wattmeter method. Three wattmeter method is used to measure power in 3 phase 4-wire circuits. However this method can also be used in 3 phase 3 wire delta connected load where power consumed by each load is required to be determined separately. ECE 494 - Electrical Engineering Laboratory III Experiment 1 Three Phase Power Measurements Objectives To demonstrate the line and phase relations in 3-phase balanced networks. To study and demonstrate the two wattmeter method of measuring the power in 3-phase networks. Equipment. Two digital multi-meters from the stockroom. Calculating and Measuring Power in Three Phase Circuits 1. Introduction The generation and transmission of electricity is commonly accomplished by means of three phase circuits. Although electrical service to residential buildings in the USA are exclusively by single phase circuits electrical 1 Chapter 11 Balanced Three-Phase Circuits 11.1-2 Three-Phase Systems. 11.3 vectorysis of the Y-Y Circuit. 11.4 vectorysis of the Y- Circuit. 11.5 Power Calculations in Balanced