GETCO EXAM PAPER (30-11-2008)

controlled by load frequency control equipments

both (a) & (c )

determined by system operators

set by design factors

is always limited by conductor area

both (a) & (b)

is increased at low ambient air temperature

may be limited by stability considerations

Core loss

Eddy current loss

Copper loss

Hysteresis loss

output is out of phase with respect to input

efficiency of transformer is usually high and hence extremely accurate measurements will be necessary

the output is sinusoidal and hence cannot be measured

losses are abnormally high

saturation of magnetic circuit

any of the above

over load

large internal fault