3.535 pu
5 pu
5.353 pu
7 pu

Power Systems The value of off diagonal elements is

which is connected between bus i and bus j with positive sign
which is connected between bus i and bus j with negative sign
sum of admittances connected at bus i
sum of admittances connected at bus j

0.025
0.25
0.02
0.05

Power Systems In a short circuit test circuit breaker, time to reach the peak re-striking voltage 60 microsecond & the peak re-striking voltage 120 kV. Determine average RRRV (Rate of rise re-striking voltage)?

3 Ãƒâ€” 106 kV / sec.
3.5 Ãƒâ€” 106 kV / sec.
1 Ãƒâ€” 106 kV / sec.
2 Ãƒâ€” 106 kV / sec.

Power Systems Aluminium is now most commonly employed conductor material in transmission lines than copper because

it is more conductive
its tensile strength is more
costlier
it is cheaper and lighter

Power Systems For 132 kV system, the reactance and capacitance up to the location of the CB is 3 ÃŽÂ© and 0.015 ÃŽÂ¼F respectively. The maximum value of RRRV is

2.0 kV / ÃŽÂ¼s.
10.01 kV / ÃŽÂ¼s.
12.2 kV / ÃŽÂ¼s.
9.01 kV / ÃŽÂ¼s.