6. Line and Phase Voltages for a Wye Circuit

11. Currents for a Wye Circuit

14. Line and Phase Currents for a Delta Load

20. The Single-Phase Equivalent

23. Summary

25. EXAMPLE 23–6

26. Single phase equivalent

30. EXAMPLE 23–8

31. Single phase equivalent

32. Solution

33. Find the  currents.

34. EXAMPLE 23–10

36. Single phase equivalent

38. Power in a Balanced System

42. Active Power to a Balanced Wye Load

43. Reactive Power to a Balanced Wye Load

44. Apparent Power

45. Power Factor

46. EXAMPLE 23–11

47. Solution

48. Solution (cont.)

50. Power to a Balanced Delta Load

52. Power Formulas for Balanced Wye and Delta Circuits

54. EXAMPLE 23–12

55. Solution

56. Power and the Single-Phase Equivalent EXAMPLE 23–13

57. single-phase equivalent

60. Measuring Power in Three- Phase Circuits

61. Three-wattmeter connection for a 4-wire load

62. Two-wattmeter connection

63. EXAMPLE 23–14

64. Solution

65. Unbalanced Load

66. EXAMPLE 23–16

67. E AB = 208 V ∠ 0° and E BC = 208 V ∠ 120°.

69. EXAMPLE 23–17

72. EXAMPLE 23–18 wattmeter readings?

74. Circuit Analysis Using Computers