step-down transformer has a ratio of transformation of 10:1 and is connected to a 2,300- V, 60 hz ac supply. If the secondary load current is 40 A, calculate the, a) primary current, b) secondary voltage, c) power

step-down transformer has a ratio of transformation of 10:1 and is connected to a 2,300- V, 60 hz ac supply. If the secondary load current is 40 A, calculate the, a) primary current, b) secondary voltage, c) power

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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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

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1. A step-down transformer has a ratio of transformation of 10:1 and is connected to a 2,300- V, 60 hz ac supply. If the secondary load current is 40 A, calculate the, a) primary current, b) secondary voltage, c) power input, and d) power output.

2. A distribution transformer is connected to a 2,300 V, 60 Hz ac source with its primary windings equal to 1,200 turns. If the secondary voltage is 230 V, and the cross sectional area of the iron is 22.86 cm2 , calculate the a) mutual flux, b) maximum flux density, and c) number of secondary turns and the ratio of transformation.

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