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Three phase circuits

  1. Dec 25, 2014 #1
    In the given figures , what does the arrows denote , I mean what direction ??
    VnR is upward in 1st fig. , VnR is towards left in 2nd fig. ( n is neutral here ) while in 3rd the line voltages are in anti-clockwise direction..!!
    I wanted to know the pupose of this and why these directions only??
     

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  2. jcsd
  3. Dec 25, 2014 #2
    The arrow denotes the sign of voltage induced in the winding when current flows in that direction. For example if current flows from terminal n to R, the voltage across the winding denoted by VnR is positive.
     
  4. Dec 25, 2014 #3
    This means it is not a particular rule we can take this in opposite direction too ??
    And what about the anti-clockwise direction of line voltages (VYR ,, VBY..) ??
     
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