Electrical Engineering > GATE 2026 > Protection - Current Transformers
In the circuit shown, the phase currents are IA = 572.812 + j50.115 A, IB = −254.525 − j459.175 A, IC = −207.083 + j444.091 A.
Given that the CTs are ideal with no saturation, and the turns ratio of the Main CT is 300:5 and that of the Auxiliary Transformer (YnΔ) is 2:1 on every phase, the value of IAR, rounded off to three decimal places, is:
A
0 A
B
0.653 ∠17.556° A
C
537.240 ∠4.105° A
D
8.954 ∠4.105° A

Correct : d

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phase currents analysis circuit analysis GATE Electrical Engineering 2026 ideal current transformer turns ratio CT Yn transformer phase angle calculation GATE 2026 Electrical electrical engineering gate complex numbers phasor diagram current transformer phase current calculation

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