10.1.1 Comparison
0 likes134 views
This document discusses power factor in a single-phase system and a two-phase system. In a single-phase system with unity power factor, the total power is equal to the voltage times the current. In a two-phase system, the total power is equal to 1.414 times the voltage times the current, due to the square root of two relationship between phase and line voltages.
1 of 10
10.1.1 Comparison
- 2. Unity Power Factor (pf = 1)
- 3. Single phase total power (PTotal) = V1 I
- 5. 2 V2 = √(V2 + V2 2) = √2(V2) 2 = √2 V2
- 6. √2V2 = V1
- 7. V2 = V1 √2
- 8. Total power (PTotal) = (2 V2) I. So substituting for V2 (PTotal) = 2 x V1 X I √2 (PTotal) = 1.414 x V1 X I
- 9. Two phase total power (PTotal) = 1.414 V1 I