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Q#1 Power System Protection GATE EE 2010 MCQ +1 mark -0.33 marks

Consider a stator winding of an alternator with an internal high-resistance ground fault. The current under the fault condition are as shown in the figure. The winding is protected using a differential current scheme with current transformers of ratio 400/5 A as shown. The current through the operating coil is

 

0.1875 A

0.2 A  

0.375 A

60 kA

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Network Analysis 260 0 0
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Digital Electronics 148 0 0
Electrical Machines 392 0 0
Power Electronics 237 0 0
Power Systems 344 0 0
EMFT EE 107 0 0
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