A transformer has an open circuit voltage of 120 volts. A tap-changing device operates when the regulation falls below 2%. The load voltage at which the tap-changer operates is a) ) 120 V b) 117.6 V c) 1176 V d) 11997.6 V

A transformer has an open circuit voltage of 120 volts. A tap-changing device operates when the regulation falls below 2%. The load voltage at which the tap-changer operates is a) ) 120 V b) 117.6 V c) 1176 V d) 11997.6 V

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter4: Symbols

Section: Chapter Questions

Problem 7SQ: The symbol shown is a(n) a. iron core transformer. b. auto transformer. c. current transformer. d....

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Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

A transformer has an open circuit voltage of 120 volts. A tap-changing device operates when the
regulation falls below 2%. The load voltage at which the tap-changer operates is
A7
a) ) 120 V
b) 117.6 V
c) 1176 V
d) 11997.6 V

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