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 2003
MCQ (Single Correct Answer)
+2
-0.6
A three-phase alternator generating unbalanced voltages is connected to an unbalanced load through a 3-phase transmission line as shown in figure. The neutral of the alternator and the star point of the load are solidly grounded. The phase voltages of the alternator are
$${E_a} = 10\angle {0^ \circ }V,\,\,\,{E_b} = 10\angle - {90^ \circ }V,\,\,{E_c} = 10\angle {120^ \circ }\,\,V.\,\,\,\,$$ The positive sequence component of the load current is
$${E_a} = 10\angle {0^ \circ }V,\,\,\,{E_b} = 10\angle - {90^ \circ }V,\,\,{E_c} = 10\angle {120^ \circ }\,\,V.\,\,\,\,$$ The positive sequence component of the load current is
Questions Asked from Symmetrical Components and Symmetrical and Unsymmetrical Faults (Marks 2)
Number in Brackets after Paper Indicates No. of Questions
GATE EE 2023 (1)
GATE EE 2018 (1)
GATE EE 2017 Set 1 (1)
GATE EE 2016 Set 1 (1)
GATE EE 2015 Set 1 (1)
GATE EE 2014 Set 2 (1)
GATE EE 2014 Set 1 (1)
GATE EE 2010 (1)
GATE EE 2008 (3)
GATE EE 2007 (1)
GATE EE 2006 (1)
GATE EE 2005 (3)
GATE EE 2004 (3)
GATE EE 2003 (2)
GATE EE 2002 (1)
GATE EE 2001 (1)
GATE EE 2000 (1)
GATE EE 1998 (1)
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits