1
GATE EE 1998
MCQ (Single Correct Answer)
+2
-0.6
The neutral of $$10$$ $$MVA,$$ $$11$$ $$kV$$ alternator is earthed through a resistance of $$5$$ ohms. The earth fault relay is set to operate at $$0.75$$ $$A.$$ The $$CT's$$ have a ratio of $$1000/5.$$ What percentage of the alternator winding is protected?
A
$$85$$%
B
$$88.2$$%
C
$$15$$%
D
$$11.8$$%
2
GATE EE 1993
MCQ (Single Correct Answer)
+2
-0.6
The distribution system shown in figure is to be protected by over current system of protection. For proper fault discrimination directional over current relays will be required at locations GATE EE 1993 Power System Analysis - Switch Gear and Protection Question 13 English
A
$$1$$ & $$4$$
B
$$2$$ & $$3$$
C
$$1,4$$ & $$5$$
D
$$2, 3$$ & $$5$$
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