CONSTRUCTION OF 30AMPS CHANGEVER WITH STEP LOADING

                                 CHAPTER 1

INTRODUCTION

1.1 Background of Study

Power instability in developing countries creates the need for automation of phase selector or alternatives source of power to back the utility supply.

Most industrial and domestic application are dependent on power supply and if the process of change over is manual ,not only considerable time wasted but also the device or machine may get damaged from human error during the change over connection incurring massive losses

Here an automatic three phase selector can be installed in residential and office premises where single phase equipment are used .when any of the mains phase line fails ,it automatically select the available phase line out of the three phase line or backup lines.

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