engineering recuitment MAHATRANSCO AE Electrical Mock Test Electrical Machines Alternator and Synchronous Motors Synchronous Motor Power
In a factory, a three-phase, 4-kV, 400-kVA synchronous machine is installed along with other induction motors. The following are the loads on the machine:
(i) Induction motors: 500 kVA at 0.8 power factor lagging
(ii) Synchronous motor: 300 kVA at unity power factor
Determine the overall power factor of the factory loads.
1
\(\frac{7}{\sqrt{58}}\) lagging
2
\(\frac{7}{\sqrt{58}}\) leading
3
\(\frac{9}{\sqrt{58}}\) leading
4
\(\frac{9}{\sqrt{58}}\) lagging
5
none of these