DESIGN AND CONSTRUCTION OF AN AUTOMATIC CHANGE-OVER SWITCH WITH GENERATOR CUT OFF AND STARTER

Code No: 422242

₦5,000.00

ABSTRACT

Power supply in Nigeria and most developing countries of the world is anything but stable. This has adverse effects on the consumers of the electricity and the equipments that are operated from the mains sources of electricity supply in these parts of the world. Automatic change over switch system is used to ensure continuous supply to load in case the mains supply is not healthy or disconnected. This project designs and constructs of an automatic change over switch with generator starter and cut-off. In this paper, we provide an automatic switching mechanism that transfers the consumer loads to a power source from a generator in the case of power failure in the main supply. It automatically detects when power has been restored to the mains supply and returns the loads to this source while turning off the power from the generator set. This mechanism has been tested and we recorded a great result. It thus holds an important key in the provision of a continuous power supply through an ear seamless switching between the mains supply and an alternative stand by source like the generator set.

CHAPTER 1

CHAPTER ONE
INTRODUCTION
1.1 Background of the Study
Public power supply is a major contributor to economic development in every nation. In developing nations like Nigeria, Ghana, Cote dâ€™Ivoire and under developed parts of the world, the public power supply for industrial, commercial and domestic use is highly unstable (Peter, 2002). This has negative effect on the economy in such that most of them had to depend on frequent use of alternative power sources such as generator, inverter, solar to meet up with the energy demands. One of the common alternate sources depended on is the use of generator set which is usually connected to a changeover switch and the public power supply also connected to the switch also. The application of alternative sources of power supply is being faced with the challenge of switching smoothly and timely between the mains supply and the generator supply whenever there is power failure on the mains source and vice versa. (Ransorne, 2009).
Automatic Changeover switch with generator cut off and starter is one of the electrical devices that can aid smooth switching from public supply to generator and vice versa. It automatically switches from one power source to another. When there is power failure in the public supply it starts the generator and switches to the supply (generator) and it equally switches over to the mains supply when power is restored and turns off the generator automatically. The automatic power changeover switchwith generator cut off and starter is a device that links the load and mains supply or the alternative supply together. This enables the use of either the mains supply or an alternative source when there is outage on the mains source without the user intervention. The changeover switch can either come in with three phase or single phase. This device maintains constant power supply to the load by automatically activating the generator when there is need. Since the user might not always be in need of the generator, provision has been made to prevent the generator from starting should an outage occur. Therefore, in view of these considerations, the project aimed at designing and constructing a workable automatic change-over switch with generator cut off and starter functions.