12.a. Comparing the transformer cores of core-form and shell-form transformers shows that the a. shell form provides lower reactance without increasing the transformer size. b. core form makes possible wider coils and better oil circulation. c. shell form is used exclusively in small low-voltage transformers. 12.b. Distribution transformers are generally protected from damage due to excessive internal temperatures, by the operation of a A. lightning arrester. B. circuit breaker. C. surge diverter.

12.a. Comparing the transformer cores of core-form and shell-form transformers shows that the a. shell form provides lower reactance without increasing the transformer size. b. core form makes possible wider coils and better oil circulation. c. shell form is used exclusively in small low-voltage transformers. 12.b. Distribution transformers are generally protected from damage due to excessive internal temperatures, by the operation of a A. lightning arrester. B. circuit breaker. C. surge diverter.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.9P

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