1
GATE EE 2000
MCQ (Single Correct Answer)
+1
-0.3
In a 3-step distance protection, the reach of the three zones of the relay at the beginning of the first line typically extends upto
A
100% of the first line, 50% of the second line and 20% of the third line.
B
80% of the first line, 50% of the second line and 20% of the third line.
C
80% of the first line, 20% of the second line and 10% of the third line.
D
50% of first line, 50% of second line and 20% of the third line.
2
GATE EE 2000
MCQ (Single Correct Answer)
+1
-0.3
In an inverse definite minimum time, electromagnetic type over-current relay, the minimum time feature is achieved because of
A
Saturation of the magnetic circuit
B
Proper mechanical design
C
Appropriate time delay element.
D
Electromagnetic damping.
3
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
$${{0.2} \over {1.732}}A$$
4
GATE EE 2000
MCQ (Single Correct Answer)
+1
-0.3
In a thermal power plant, the feed water coming to the economiser is heated using
A
H.P steam
B
L.P steam
C
Direct heat in the furnance
D
Flue gases.
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