A 100/500 V, 1 KVA, 50 Hz transformer was put through open and short-circuit tests to find its parameters. The test conditions and derived parameters are as follows: internal Open circuit test: The high voltage side terminals were open. The low voltage side was connected to 10020°, 50 Hz supply. The low voltage side current was measured as 50445º mA. Short-circuit test: The high voltage side terminals were short-circuited. The low voltage side was connected to a variable voltage supply (50 Hz). A full load current of 102-30° A was achieved when the variable voltage supply was at 840° V. The transformer was then put to operation by connecting a load of 400430° N to the high voltage side (secondary) while applying a primary voltage of 10020° V. Calculate the primary current (the current drawn from the power supply).

A 100/500 V, 1 KVA, 50 Hz transformer was put through open and short-circuit tests to find its parameters. The test conditions and derived parameters are as follows: internal Open circuit test: The high voltage side terminals were open. The low voltage side was connected to 10020°, 50 Hz supply. The low voltage side current was measured as 50445º mA. Short-circuit test: The high voltage side terminals were short-circuited. The low voltage side was connected to a variable voltage supply (50 Hz). A full load current of 102-30° A was achieved when the variable voltage supply was at 840° V. The transformer was then put to operation by connecting a load of 400430° N to the high voltage side (secondary) while applying a primary voltage of 10020° V. Calculate the primary current (the current drawn from the power supply).

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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answer: 5.19 – j2.95 A

A 100/500 V, 1 KVA, 50 Hz transformer was put through open and short-circuit tests to find its
internal parameters. The test conditions and derived parameters are as follows:
Open circuit test:
The high voltage side terminals were open.
The low voltage side was connected to 1000°, 50 Hz supply.
The low voltage side current was measured as 50445° mA.
Short-circuit test:
The high voltage side terminals were short-circuited.
The low voltage side was connected to a variable voltage supply (50 Hz).
A full load current of 102-30° A was achieved when the variable voltage supply was at 840° V.
The transformer was then put to operation by connecting a load of 400430° N to the high
voltage side (secondary) while applying a primary voltage of 10040° V.
Calculate the primary current (the current drawn from the power supply).

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