EE 240 - HOMEWORK - Solution 8

EE 240 - HOMEWORK - Solution 8 - O I nN = I NB- I AN = 1.5A...

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EE240-A2-2010 Assignment #8 SOLUTION 1. S 1 = 120VA / 0 O ; S 1 = 180VA / 0 O ; S 3 = 1200VA / 37 O since cos -1 (.8) = 37°. I AN * = S 1 /V 1 = [ 120VA / 0 O ] / [ 120V RMS / 0 O ]= 1.0A RMS / 0 O = I AN I NB * = S 2 /V 2 = [ 180VA / 0 O ] / [120V RMS / 0 O ]= 1.5A RMS / 0 O = I BN I C * = S 3 /( V 1 + V 2 ) = [ 1200VA / 37 O ] / [ 240 V RMS / 0 O ]= 5.0A RMS / 37 O I C = 5.0A RMS /- 37 O I aA = I AN + I C = 1.0A RMS / 0 O + 5.0A RMS /- 37 O = 5.83 A RMS /- 31.1
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Unformatted text preview: O I nN = I NB- I AN = 1.5A RMS / O-1.0A RMS / O = 0.5 A RMS / O Total power = 120W + 180W + (1200x0.8)W = 1260 W = 1.26 kW Energy usage in 24 hr = 30.24 kWh 2. 3. 4. n = 2 so n 2 = 4. 5. n 1 = 1/4, n 2 = 1/2 4....
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EE 240 - HOMEWORK - Solution 8 - O I nN = I NB- I AN = 1.5A...

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