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Sanjayo
February 17, 2016, 04:21 PM
A watt-hour meter draws 1.5 W and 11.3 VAR from a potential transformer and 1.88 W and 1.8 VARS from a current transformer. What is the total burden on the current transformer?

this question is on the level 3. can someone help with the solution?

randyw8483
February 19, 2016, 01:50 PM
A watt-hour meter draws 1.5 W and 11.3 VAR from a potential transformer and 1.88 W and 1.8 VARS from a current transformer. What is the total burden on the current transformer?

this question is on the level 3. can someone help with the solution?

The total burden would be apparent power on the CT. Real Power^2 + Reactive Power^2 = Apparent Power Squared

SQRT(1.88^2 + 1.8^2) = 2.603 VA