1
GATE EE 2003
MCQ (Single Correct Answer)
+2
-0.6
A list of relays and the power system components protected by the relays are given in List-$${\rm I}$$ and List-$${\rm II}$$ respectively. Choose the correct match from the four choices given below

List-$${\rm I}$$
$$A.$$ Distance relay
$$B.$$ Under frequency relay
$$C.$$ Differential relay
$$D.$$ Buchholz relay

List-$${\rm II}$$
$$1.$$ Transformers
$$2.$$ Turbines
$$3.$$ Busbars
$$4.$$ Shunt capacitors
$$5.$$ Alternators
$$6.$$ Transmission lines

A
$$A = 6,\,B = 5,\,C = 3,\,D = 1$$
B
$$A = 4,\,B = 3,\,C = 2,\,D = 1$$
C
$$A = 5,\,B = 2,\,C = 1,\,D = 6$$
D
$$A = 6,\,B = 4,\,C = 5,\,D = 3$$
2
GATE EE 2000
MCQ (Single Correct Answer)
+2
-0.6
The plug setting of a negative sequence relay is $$0.2$$ $$A.$$ The current transformer ratio is $$5:1$$. The minimum value of line to line fault current for the operation of the relay is
A
$$1A$$
B
$${1 \over {1.732}}A$$
C
$$1.732$$ $$A$$
D
$${{0.2} \over {1.732}}A$$
3
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
$$11.8$$%
4
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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