1
GATE EE 2010
MCQ (Single Correct Answer)
+2
-0.6
A three-phase, $$33$$ kV oil circuit breaker is rated $$1200$$ A, $$2000$$ MVA, $$3$$s. The symmetrical breaking current is
A
$$1200$$ A
B
$$3600$$ A
C
$$35$$ kA
D
$$104.8$$ kA
2
GATE EE 2007
MCQ (Single Correct Answer)
+2
-0.6
Consider the protection system shown in the figure below. The circuit breakers numbered from $$1$$ to $$7$$ are of identical type. A single line to ground fault with zero fault impedance occurs at the midpoint of the line (at point F), but circuit breaker $$4$$ fails to operate (''Stuck breaker''). If the relays are coordinated correctly, a valid sequence of circuit breaker operation is GATE EE 2007 Power System Analysis - Circuit Breaker Question 3 English b
A
$$1,2,6,7,3,5$$
B
$$1,2,5,5,7,3$$
C
$$5,6,7,3,1,2$$
D
$$5,1,2,3,6,7$$

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