Consider the following statements regarding power measurement of three-phase circuits by the two-wattmeter method
1. Total power can be measured if the three-phase load is balanced and can be represented by an equivalent Y connection only
2. Total power can be measured for the three-phase load irrespective of, whether the load is balanced or not and connected in Y or Δ
3. Power factor can be calculated only if the three-phase load is balanced
Which of the above statements are correct?1
1 and 2 only
2
1 and 3 only
3
2 and 3 only
4
2 only
5
1, 2 and 3