1
GATE EE 1999
Subjective
+5
-0
Determine the required MVA rating of the circuit breaker CB for the system shown in given figure. Consider the grid as infinite bus. Choose 6 MVA as base. Transformer 3-phase, 33/11 kV, 6 MVA, 0.01+j0.08 p.u. impedance. Load 3-phase 11 kV, 5800 kVA, 0.8 lag, j0.2 p.u. impedance. Impedance of each feeder 9+j 18 $$\Omega $$. GATE EE 1999 Power System Analysis - Symmetrical Components and Symmetrical and Unsymmetrical Faults Question 7 English
2
GATE EE 1999
MCQ (Single Correct Answer)
+1
-0.3
Three sections of a feeder are provided with circuit breakers CB1, CB2, CB3, CB4, CB5 and CB6. For a fault F as indicated in figure. GATE EE 1999 Power System Analysis - Circuit Breaker Question 6 English
A
CB5 must be set to trip after CB1 trips.
B
CB5 must be set to trip after CB3 and CB4 trips.
C
CB5 must be set to trip after CB2 trip.
D
CB5 must be set to trip before CB1, CB2, CB3 and CB4 trip.
3
GATE EE 1999
MCQ (Single Correct Answer)
+2
-0.6
A rectangular current pulse of duration T and magnitude 1 has the Laplace transform
A
1/s
B
(1/s)exp(-Ts)
C
(1/s)exp(Ts)
D
(1/s)[1-exp(-Ts)]
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