railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Electrical and Electronics Measurements Measurement of Power Measurement of Poly Phase Power
Two watt meter method for 3 phase circuit is preferred over other methods because
1
power factor of the load can also be estimated
2
it can be used for star or delta connected load
3
it can be used for balanced or unstable load
4
all are correct