Design and Construction of a 2kva Variac 0v240v Range

Design and Construction of a 2kva Variac (0v-240v) Range

Project / Seminar Material
Reference ID: PS-23688-TM

DEDICATION

This research material titled “Design and Construction of a 2kva Variac (0v-240v) Range” is dedicated to God for his enabling grace, and to all computer enthusiasts who contributed to make life a pleasant experience during my research documentation.

ACKNOWLEDGEMENT

I extend my sincere gratitude to all those who contributed to the completion of this project. Special thanks to my Supervisor (Name of your Supervisor), the Head of Department (Name of your HOD), the Lecturers in the department of Electrical / Electronics Engineering (EE), Book Authors and Profound Scholars of existing or related project material on “Design and Construction of a 2kva Variac (0v-240v) Range” for their invaluable guidance, support, and expertise throughout the journey.

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ABSTRACT

Variac is a single primary winding wrapped around a magnetic core is used as in the autotransformer but instead of being fixed at some point, the secondary is tapped continuously over the output voltage range. The aim of the study is to design and construct a 2kva (0v - 240v) range, with a step up of 20v at 10 step. In achieving this aim, the following specific objectives were set out to power the electrical/electronic and laboratory equipments with a fixed input voltage, design a system that will be able to vary voltage from 0V to 240V, construct the system stated in the aim above using locally available materials, and examine the design process of 2kva autotransformer with a step up of 20v at 10 step. All the details that are required to help in constructing the variac to ensure that it gives the desired results were also determined. The appropriate insulation materials as well as the electrical accessories were selected taking the power, voltage and current rating of the variac into consideration. The construction was divided into three segments: magnetic circuit, electrical circuit and casing construction. The magnetic circuit construction gives details of the magnetic core and how it was prepared for winding along. The electrical circuit construction gives details of the whole winding along with insulation and leads termination. The constructed work was tested. The tests carried out include continuity test, insulation resistance test, mechanical and running tests. This study will be of immense benefit to other researchers who intend to know more on this study and can also be used by non-researchers to build more on their research work. This study contributes to knowledge and could serve as a guide for other study.

Design and Construction of a 2kva Variac (0v-240v) Range

CHAPTER ONE

1.1 Introduction

A variac is also known as a variable autotransformer, which is a single primary winding wrapped around a magnetic core is used as in the autotransformer but instead of being fixed at some point, the secondary is tapped continuously over the output voltage range. In the construction, a toroidal core was used so as to allow for easy variation of output voltage. All the details that are required to help in constructing the variac to ensure that it gives the desired results were also determined. The appropriate insulation materials as well as the electrical accessories were selected taking the power, voltage and current rating of the variac into consideration. The construction was divided into three segments: magnetic circuit, electrical circuit and casing construction. The magnetic circuit construction gives details of the magnetic core and how it was prepared for winding along. The electrical circuit construction gives details of the whole winding along with insulation and leads termination. The constructed work was tested. The tests carried out include continuity test, insulation resistance test, mechanical and running tests.

As a prelude to other parts of this study, this chapter will discuss the background upon which this study was initiated, the statement of problems that led to this study, the Aim and Objectives of the study. Others are Significance of the study, Scope of work, Limitations of the Study and Definition of technical terms.

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CHAPTER TWO

2.0 Literature Review

2.1 Introduction

This chapter focuses on the review of related literature. A literature review includes the current knowledge as well as theoretical and methodological contributions to a particular topic. It documents the state of the art with respect to the topic you are writing. It surveys the literature in the topic selected. In this research work the literature review includes the …

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