A 200 A 5 A, 60 Hz current transformer has the following parameters as seen from the 200 A (primary) winding X1 745 X2 813 Xm 307m R1 136 R2 128 a Assuming a current of 200 A in the primary and that the secondary is short circuited, find the magnitude and phase angle of the secondary current b Repe...

part a The transformer turns r ...

A 200-A: 5-A, 60-Hz current transformer has the following parameters as seen from the 200-A (primary) winding:

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A 200-A: 5-A, 60-Hz current transformer has the following parameters as seen from the 200-A (primary) winding: X1 = 745μ Ω X’2 = 813μ Ω Xm = 307m Ω R1 = 136μ Ω R2 = 128μ Ω

a. Assuming a current of 200 A in the primary and that the secondary is short-circuited, find the magnitude and phase angle of the secondary current.

b. Repeat the calculation of part (a) if the CT is shorted through a 250μ Ω burden.

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Electric Machinery

ISBN: 978-0071230100

6th Edition

Authors: Charles Kingsley, Jr, Stephen D. Umans

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Question Posted: Feb 12, 2011 02:28 AM

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A 200-A: 5-A, 60-Hz current transformer has the following parameters as seen from the 200-A (primary) winding:

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