Explain in detail about what is star and delta three phase system ?

Star Connection (Wye connection)

  • The star or Wyc connection of the three alternator windings is shown in Fig. I(a). This configuration is obtained by connecting one and of the three phase windings together.
  • We can connect either R Y B or R’ Y’ B’ together, This common point is called as the Neutral point and it is denoted by N.
  • The remaining three ends of the windings arc brought out for the external connections. These ends arc denoted by R-Y-B as shown in Fig. 1(b).

Delta Connection

  • The delta or mesh connection of the three alternator windings is shown in Fig. 2.
  • The delta or mesh configuration is obtained by connecting one end of winding to the starting end of the other winding such that it produces a closed loop as shown in Fig. 2.

A.C. CIRCUITS TOPIC

  1. Introduction Of AC Circuits In Electrical Engineering
  2. How emf is induced in single phase system ? single phase generation .
  3. Explain what is ac quantity : and Advantages of AC over DC in circuits
  4. What is waveform, amplitude, cycle, time-period, phase & phase difference
  5. Define RMS & average value as applied to A.C. voltage & current
  6. What is form factor? crest factor? peak factor? & power factor? in ac circuits
  7. what is phasor diagram, phasor algebra, leading & lagging ac quantities
  8. Phasor representation of alternating quantities – resistive, inductive, capacitive
  9. What is R-L-C series connection for A.C. circuit ? Explanation
  10. What is series combination of R-L circuit ? Explanation
  11. Define what is active power, reactive power, apparent power & power factor
  12. Explain what is series combination of R-C circuit in electrical engineering
  13. What is simple parallel AC circuits ? Explanation -electrical engineering
  14. Resonance as applicable to simple RLC series circuit? effect on circuit performance
  15. Explain three phase generation of voltage ? electrical engineering
  16. Explain in detail about what is star and delta three phase system ?
  17. Relation between phase voltage & line voltage in case of balanced star connected load
  18. relationship between line current & phase current for delta connected 3 load
  19. Relation between power consumed in a balanced star & delta connection

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