A 3 phase balanced supply feeds 3 phase unbalanced load. Power supplied to the load can be measured by using
1.2 wattmeter
2.one wattmeter
3.3 wattmeter
Which of the above statements is correct?
Answer: B
A minimum of 2 wattmeters is required to measure 3 phase power. Of course power can be measured by putting one wattmeter in each phase.