Answer / k.prakashchandra

110-115% and 80-90%

Answer / chandrabhan pal

setting of overload relay is 110 to 115 percent.
Setting of under voltage relay is 80 percent.

WE know that for Inductor X=2pifL,In DC f=0,then X=0 so,V=IX=0;But In the DC excitation of rotor of AC generator,DC motor field coil which coils are inductor so why does not applying DC voltage short the rotor coil of AC generator and field coil of motor?If it would then DC source might be damaged but it is not happened. Why does the strand conductor of Electrical power transmission line make twist?

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