1
GATE EE 1997
MCQ (Single Correct Answer)
+1
-0.3
A $$100$$ $$MVA$$, $$11$$ $$kV$$, $$3$$-phase, $$50$$ $$Hz$$, $$8$$-pole synchronous generator has an inertia constant H equal to $$4$$ $$MJ/MVA.$$ The stored energy in the rotor of the generator at synchronous speed will be $$H = {E \over G}$$
A
$$100$$ MJ
B
$$400$$ MJ
C
$$800$$ MJ
D
$$12.5$$ MJ
2
GATE EE 1997
Subjective
+5
-0
A synchronous motor is receiving 50% of the power it is cable to receiving from an infinite bus. If the load on the motor is suddenly reduced to 80% of the previous value, swing of the motor around is new equilibrium position.
3
GATE EE 1997
MCQ (Single Correct Answer)
+1
-0.3
For a fault at the terminals of a synchronous generator, the fault current is maximum for a
A
3-phase fault
B
3-phase to ground fault
C
line-to ground fault
D
line-to-line fault
4
GATE EE 1997
MCQ (Single Correct Answer)
+1
-0.3
The use of high-speed of circuit-breakers
A
Reduces the short circuit current
B
Improves system stability
C
Decreases system stability
D
Increases the short circuit current
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