Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781305494817
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 5, Problem 7RQ
A 480-volt three-phase load is rated at 34.5 kVA. It is to be supplied with variable three-phase voltage. Because the load is continuous, the transformers ratings are to be increased by 1.25% of the rated load. Three variable autotransformers are used to supply this load. Refer to Table 4-2 and determine the standard size of each transformer that should be used to make this connection.
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Chapter 5 Solutions
Electrical Transformers and Rotating Machines
Ch. 5 - An AC power source is connected across 325 turns...Ch. 5 - Is the transformer in question 1 a step-up or...Ch. 5 - Prob. 3RQCh. 5 - A load impedance of 52 Ω is connected to the...Ch. 5 - How much current will flow in the primary of the...Ch. 5 - Prob. 6RQCh. 5 - A 480-volt three-phase load is rated at 34.5 kVA....Ch. 5 - If the load in question 7 was supplied by two...Ch. 5 - Prob. 1PCh. 5 - Prob. 2P
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