GATE EE 2019 Set 1 — Question 33
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Electrical & Electronic Measurements → Instrument Transformers → Burden & Applications
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Question
The total impedance of the secondary winding, leads, and burden of a 5 A CT is 0.01 . If the fault current is 20 times the rated primary current of the CT, the VA output of the CT is ________.
Correct answer
100 to 100
Solution
Given:
Rated secondary current, A
Total secondary impedance,
Fault current is 20 times the rated primary current. Assuming the CT does not saturate, the secondary current during the fault will also be 20 times the rated secondary current:The VA output of the CT is the power dissipated in the total secondary impedance:
Rated secondary current, A
Total secondary impedance,
Fault current is 20 times the rated primary current. Assuming the CT does not saturate, the secondary current during the fault will also be 20 times the rated secondary current:The VA output of the CT is the power dissipated in the total secondary impedance:
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