33 Pages
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4,024 Words
The basic aim of the design and construction of this three phase automatic phase selector is to demonstrate how contactors can be used to switch in between three lines or phases e.g “RED, YELLOW AND THE BLUE PHASE” without interfering with the contacts. This type of phase selector is able to switch between phases with the aid of inter-locking one phase to the other either one phase circuit is dependant on the other phase circuit which […]
51 Pages
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5,437 Words
INTRODUCTION As the growing population of human race widens the gulf between energy supply and energy demand, the imbalance in energy availability sent researchers into excavating for a way of settling this age long squabble. A lasting solution is vested on alternative use of the renewable energy source, a project that is yet to be widely applied. Hence, the continuation of the unsettled yearns for sufficient power. Consequently, the p […]
33 Pages
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3,849 Words
1.1 INTRODUCTION Change over switch is a device used to switch off a power supply and subsequently switch on another power source. Basically it is aimed at switching on a more convenient power supply to the load. Since it switches on power to the load precaution has to be taken while choosing the type of change over switch. Also size, arcing control are put into consideration in the choice. A good switch should be the one whose contact […]
ABSTRACT Constant supply of power is the wheel of growth to any nation’s economy. A country like Nigeria, where total power generation is less than one quarter of total demand, means of augmentation and smooth operation cannot be over emphasized. This paper presents a real laboratory design and construction of Automatic Transfer Switch (ATS) with three phase selector. The design method involves the use of electromechanical type relays […]
ABSTRACT This project work is on the design and construction of automatic changeover switch with phase selector and power failure alarm. It provides a means of switching from one phase of AC mains to another in the case of failure in the existing phase; it also changeover to generator if there is failure in all the three phases of the AC mains. The circuit also senses the restoration of any or all the three phases of the mains and cha […]
Abstract: This project work is on the design and construction of automatic phase selector and changeover switch for 3-phase power supply. It provides a means of switching from one phase of AC mains to another in the case of failure in the existing phase; it also change over to generator if there is failure in all the three phases of the AC mains. The circuit also senses the restoration of any or all the three phases of the mains and c […]
ABSTRACT This project work is on the design and construction of automatic phase selector for 3-phase power supply. It provides a means of switching from one phase of AC mains to another in the case of failure in the existing phase; This project has been improved on the existing types of electromechanical device that has being in use over the years. Hence this has been achieved by the use of operational amplifier, timing circuit and h […]