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A star connection provides

  • A.a neutral point for a four-wire supply
  • B.a closed path for third harmonic currents
  • C.a higher current rating for the same conductor
  • D.immunity from unbalanced loading of the phases

Answer: A

The neutral is what makes a four-wire distribution system possible and gives a reference for earthing and protection. A delta winding gives the closed path for triple harmonics, which is why the two are often combined.

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