Description : For protection of rotating machines against lightning surges _______ is used. (1) lightning arrester (2) capacitor (3) combination of lightning arrester and capacitor (4) lightning conductor and arrester
Answer : For protection of rotating machines against lightning surges combination of lightning arrester and capacitor is used.
Description : How do you measure power factor?
Answer : P= 1.83*V*I*COS@ where P is power V is voltage I is current COS @ is P.F COS@= P/(1.83*V*I) in other way cos @ = true power/apparent power
Description : Why do we need to correct power factor?
Description : What can you do to prevent a power surge?
Answer : By applying various power quality monitoring devices and using telecommunication technique .