Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781305494817
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 13, Problem 5RQ
To determine
Whether the transformer is derated or not and the magnitude of the derated amount.
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Electrical Transformers and Rotating Machines
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- Question 4 A 228 V/ 111 V single-phase transformer has a core loss of 110 W and the no-load current is 0.7 A. The no load power factor is Not yet answered Marked out of O 0.99 1.00 O 1.42 P Flag question O 0.48 O 0.69 Question 5 A 2 kV / 229 V transformer has the secondary turns of 47. The number of Primary turns of a transformer is given by, Not yet answered 63.83 Marked out of 410.48 1.00 O 615.72 P Flag question O 5381.50 Question 6 For the given power transfer, a delta system is associated with larger line currents and a star system is associated with a larger line voltage. Not yet answered Select one: Marked out of O True 1.00 P Flag question O Falsearrow_forwardWhat is the peak voltage of an AC circuit which has an RMS voltage of 115V?arrow_forwardIn an RL circuit, if R = 100 n, L = 1.0 H, the time constant T will be: Ο Α. 10 ms ОВ. 1 ms O C.0.01 ms O D. 0.1 ms E. None of the other choices are correctarrow_forward
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