Effect of Reversed Phase Polarity on Active & Reactive Power of 3-Phase System?
Power Comes 10.267 KW, instead of 6.9 KW


If the supply and load are balanced then the 3 phase power is 3 x 230 V x 10 A = 6.9 kW irrespective of phase rotation.


  Please review my calculations and tell me if I am doing something
  wrong. Because I did measure power through Three Phase meter, it
  showed the phase voltages as I calculated but overall power was around
  6.8KW while my calculation show 10.267KW??


No, because you have made a mountain out of something that is basically very simple.


  If I am wrong, what will be right approach to calculate power in this
  scenario?


Use common sense and treat the scenario you described in your question as three single phase circuits each having a power of 2300 watts hence, when totalled, becomes 6900 watts.