Design And Construction Of An Automatic Changeover Switch

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mso-fareast-font-family:"Times New Roman"">ABSTRACT
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mso-fareast-font-family:"Times New Roman"">The main aim of any electric power

supply in the world is to provide uninterrupted power supply at all times to

all its consumers. Although, in developing countries, the electric power

generated to meet the demands of the growing consumers of electricity is

insufficient, hence power instability and outage.

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mso-fareast-font-family:"Times New Roman"">Power instability or outage in

general does not promote development in the public and private sector. The

investors do not feel secure to come into a country with constant or frequent

power failure. These limit the development of industries. In addition, there

are processes that cannot be interrupted because of their importance for

instance, surgery operation in hospitals, transfer of money between banks and

lots more.Power instability and outage in developing countries (Nigeria)

creates a need for alternative sources of power to backup the mains supply.

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mso-fareast-font-family:"Times New Roman"">Automatic changeover switches find a

wide application scope wherever the reliability of electrical supply from the

utilities is low and it is used in lighting/motor circuits wherever continuity

of supply is necessary, for switching to an alternative source from main supply

and vice versa.

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mso-fareast-font-family:"Times New Roman"">This project is a design of an

automatic changeover switch. This means that when there is any mains failure,

the automatic changeover switch will change to an alternative power supply

(Generator), and back to the main supply when it is restored.

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mso-fareast-font-family:"Times New Roman"">The purpose of this project is to

maintain constant supply to the main circuit that is being supplied by

making-up for the time lapse or delay that usually accompanies the manual

switching from one source to another.

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mso-fareast-font-family:"Times New Roman"">The design comprises of the power

connection circuit and control connection circuit. The main components to be

used include; contactors, relays and timer.

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