1
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
A $$3$$-phase generator rated at $$110$$ MVA, $$11$$ kV is connected through circuit breakers to a transformer. The generator is having direct axis sub-transient reactance $$X'{'_d} = 19\% ,\,\,$$ transient reactance $$X{'_d} = 26\% \,\,$$ and synchronous reactance $$=130$$%. The generator is operating at no load and rated voltage when a three phase short circuit fault occurs between the breakers and the transformer. The magnitude of initial symmetrical rims current in the breakers will be
2
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
A 3-phase transmission line supplies $$\Delta - $$ connected load Z. The conductor $$'c'$$ of the line develops an open circuit fault as shown in figure. The currents in the lines are as shown on the diagram. The +ve sequence current component in line 'a' will be
3
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
A 500 MVA, 50 Hz, 3-phase turbo-generator produces power at 22 kV. Generator is Y-connected and its neutral is solidly grounded. Its sequence reactances are X1 = X2 = 0.15 and X0 = 0.05 pu. it is operating at rated voltage and disconnected from the rest of the system (no load). The magnitude of the sub-transient line current for single line ground fault at the generator terminal in pu will be
4
GATE EE 2004
MCQ (Single Correct Answer)
+1
-0.3
The transmission line distance protection relay having the property of being inherently directional is
Paper analysis
Total Questions
Analog Electronics
9
Control Systems
13
Digital Electronics
5
Electric Circuits
7
Electrical and Electronics Measurement
9
Electrical Machines
19
Electromagnetic Fields
2
Engineering Mathematics
1
Power Electronics
8
Power System Analysis
15
Signals and Systems
3
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