When measured against a common reference, the phase angle of the secondary curre

ID: 2291164 • Letter: W

Question

When measured against a common reference, the phase angle of the secondary current of a current transformer measures minus 10 degrees, while the phase angle of the primary current from the same current transformer measures minus 12 degrees. What is the relative phase angle between the secondary current and the primary current? 9. a. Positive 2 degrees b. Negative 2 degrees Positive 22 degrees d. Negative 22 degrees e. Indeterminate from the data given 10. The accuracy of a certain current transformer is 0.49% at 5 amps. This CT would be appropriate for use in which application(s) - mark all that are correct: a. Metering b. Monitoring c. Control d. Traveling wave e. None of the above

Explanation / Answer

9)Relative phase angle between primary and secondary phases are positive 22 degrees

10)For metering application purpose we can use CT with accuracy upto 0.5%

18) option d

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When measured against a common reference, the phase angle of the secondary curre

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