In the balanced three phase power measurement using two wattmeter method, each wattmeter reads 22 kW, when the pf is unity. What does each wattmeter reads when the pf falls to (0 0.866 lag and (i) 0.906 lag. The total three-phase power remains unchanged. O W1 at 0.866 lag (O W2 at 0.866 lag (1) W1 at 0.906 lag (1) W2 at 0.906 lag

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In the balanced three phase power measurement using two wattmeter method, each wattmeter reads 22 kW when the pf is unity. What does each wattmeter
reads when the pf falls to () 0.866 lag and (i) 0.906 lag. The total three-phase power remains unchanged.
O W1 at 0.866 lag
) W2 at 0.866 lag
(1) W1 at 0.906 lag
(1) W2 at 0.906 lag
A 4000 V / 230 V 50HZ single-phase transformer is to have an approximate emf per turn of 10 V and cross sectional area of 330 cm². Calculate (a) the number
of primary turns (b) number of secondary turns (c) maximum value of flux anc (d) the maximum value of flux density
Number of turns in Primary
Number of turns in Secondary
Maximum value of flux
Maximum value of flux density
Transcribed Image Text:Learning Portal Reports - e-Services - Academic Departments ETC - CIMS Courses - In the balanced three phase power measurement using two wattmeter method, each wattmeter reads 22 kW when the pf is unity. What does each wattmeter reads when the pf falls to () 0.866 lag and (i) 0.906 lag. The total three-phase power remains unchanged. O W1 at 0.866 lag ) W2 at 0.866 lag (1) W1 at 0.906 lag (1) W2 at 0.906 lag A 4000 V / 230 V 50HZ single-phase transformer is to have an approximate emf per turn of 10 V and cross sectional area of 330 cm². Calculate (a) the number of primary turns (b) number of secondary turns (c) maximum value of flux anc (d) the maximum value of flux density Number of turns in Primary Number of turns in Secondary Maximum value of flux Maximum value of flux density
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