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13.1.2 Line And Current

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13.1.2 Line And Current

  1. 1. !
  2. 2. !
  3. 3. !
  4. 4. !
  5. 5. !
  6. 6. !
  7. 7. VL = VP (delta)
  8. 8. !
  9. 9. IL = √ 3 IP (delta)
  10. 10. L1 Red L3 Blue L2 White
  11. 11. Comparisons between Star and Delta connected systems Star (Y) Delta (∆) Similar ends connected Dissimilar ends connected For balanced or unbalanced loads More suitable for balanced loads VL = √ 3 Vp VL = VP IL = Ip IL = √ 3 Ip Two values of voltage available One common voltage only available Has common connection available No common earthing point for earthing VL leads V by 30°E IL leads I, by 30°E Suited to long-distance power Suited to locally operated machinery * transmission * * Both connections have their advantages in the distribution of electrical power and both are used in situations dependent on local conditions and requirements.
  12. 12. Comparisons between Star and Delta connected systems Star (Y) Delta (∆) Similar ends connected Dissimilar ends connected For balanced or unbalanced loads More suitable for balanced loads VL = √ 3 Vp VL = VP IL = Ip IL = √ 3 Ip Two values of voltage available One common voltage only available Has common connection available No common earthing point for earthing VL leads V by 30°E IL leads I, by 30°E Suited to long-distance power Suited to locally operated machinery * transmission * * Both connections have their advantages in the distribution of electrical power and both are used in situations dependent on local conditions and requirements.
  13. 13. Comparisons between Star and Delta connected systems Star (Y) Delta (∆) Similar ends connected Dissimilar ends connected For balanced or unbalanced loads More suitable for balanced loads VL = √ 3 Vp VL = VP IL = Ip IL = √ 3 Ip Two values of voltage available One common voltage only available Has common connection available No common earthing point for earthing VL leads V by 30°E IL leads I, by 30°E Suited to long-distance power Suited to locally operated machinery * transmission * * Both connections have their advantages in the distribution of electrical power and both are used in situations dependent on local conditions and requirements.
  14. 14. Comparisons between Star and Delta connected systems Star (Y) Delta (∆) Similar ends connected Dissimilar ends connected For balanced or unbalanced loads More suitable for balanced loads VL = √ 3 Vp VL = VP IL = Ip IL = √ 3 Ip Two values of voltage available One common voltage only available Has common connection available No common earthing point for earthing VL leads V by 30°E IL leads I, by 30°E Suited to long-distance power Suited to locally operated machinery * transmission * * Both connections have their advantages in the distribution of electrical power and both are used in situations dependent on local conditions and requirements.
  15. 15. Comparisons between Star and Delta connected systems Star (Y) Delta (∆) Similar ends connected Dissimilar ends connected For balanced or unbalanced loads More suitable for balanced loads VL = √ 3 Vp VL = VP IL = Ip IL = √ 3 Ip Two values of voltage available One common voltage only available Has common connection available No common earthing point for earthing VL leads V by 30°E IL leads I, by 30°E Suited to long-distance power Suited to locally operated machinery * transmission * * Both connections have their advantages in the distribution of electrical power and both are used in situations dependent on local conditions and requirements.
  16. 16. Comparisons between Star and Delta connected systems Star (Y) Delta (∆) Similar ends connected Dissimilar ends connected For balanced or unbalanced loads More suitable for balanced loads VL = √ 3 Vp VL = VP IL = Ip IL = √ 3 Ip Two values of voltage available One common voltage only available Has common connection available No common earthing point for earthing VL leads V by 30°E IL leads I, by 30°E Suited to long-distance power Suited to locally operated machinery * transmission * * Both connections have their advantages in the distribution of electrical power and both are used in situations dependent on local conditions and requirements.
  17. 17. Comparisons between Star and Delta connected systems Star (Y) Delta (∆) Similar ends connected Dissimilar ends connected For balanced or unbalanced loads More suitable for balanced loads VL = √ 3 Vp VL = VP IL = Ip IL = √ 3 Ip Two values of voltage available One common voltage only available Has common connection available No common earthing point for earthing VL leads V by 30°E IL leads I, by 30°E Suited to long-distance power Suited to locally operated machinery * transmission * * Both connections have their advantages in the distribution of electrical power and both are used in situations dependent on local conditions and requirements.
  18. 18. Comparisons between Star and Delta connected systems Star (Y) Delta (∆) Similar ends connected Dissimilar ends connected For balanced or unbalanced loads More suitable for balanced loads VL = √ 3 Vp VL = VP IL = Ip IL = √ 3 Ip Two values of voltage available One common voltage only available Has common connection available No common earthing point for earthing VL leads V by 30°E IL leads I, by 30°E Suited to long-distance power Suited to locally operated machinery * transmission * * Both connections have their advantages in the distribution of electrical power and both are used in situations dependent on local conditions and requirements.
  19. 19. Comparisons between Star and Delta connected systems Star (Y) Delta (∆) Similar ends connected Dissimilar ends connected For balanced or unbalanced loads More suitable for balanced loads VL = √ 3 Vp VL = VP IL = Ip IL = √ 3 Ip Two values of voltage available One common voltage only available Has common connection available No common earthing point for earthing VL leads V by 30°E IL leads I, by 30°E Suited to long-distance power Suited to locally operated machinery * transmission * * Both connections have their advantages in the distribution of electrical power and both are used in situations dependent on local conditions and requirements.

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