Ratio of the readings of two watt meters connected to measure

Home » Electrical and Electronics Measurements » Electrical and electronics measurements miscellaneous » Question

Ratio of the readings of two watt meters connected to measure power in a balanced 3-phase load is 5: 3 and the load is inductive. The power factor at load is

1. 0.917 lead
2. 0.917 lag
3. 0.6 lead
4. 0.6 lag

Correct Option: D

tan φ = √3	W₁ - W₂	= √3	5 - 3	=	√3
	W₁ + W₂		5 + 3		4

∴ cos φ =	1	= 0.917 (lag)
	√19