1
GATE EE 2004
+1
-0.3
The transmission line distance protection relay having the property of being inherently directional is
A
impedance relay
B
MHO relay
C
OHM relay
D
reactance relay
2
GATE EE 2002
+1
-0.3
Consider the problem of relay co-ordination for the distance relays $$R1$$ and $$R2$$ on adjacent lines of a transmission system figure. The Zone $$1$$
and Zone $$2$$ settings for both the relays are indicated on the diagram. Which of the following indicates the correct time setting for the Zone $$2$$ of relays $$R1$$ and $$R2.$$
A
$$TZ{2_{R1}} = 0.6s,\,\,TZ{2_{R2}} = 0.3s$$
B
$$TZ{2_{R1}} = 0.3s,\,\,TZ{2_{R2}} = 0.6s$$
C
$$TZ{2_{R1}} = 0.3s,\,\,TZ{2_{R2}} = 0.3s$$
D
$$TZ{2_{R1}} = 0.1s,\,\,TZ{2_{R2}} = 0.3s$$
3
GATE EE 2000
+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.
4
GATE EE 2000
+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.
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