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Design And Construction Of A Single Phase Automatic Change Over Switch With Phase Selector
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Furthermore, if the President of the country is making a nation wide
broadcast and all of a sudden there is power failure in the transmitting
station, it would be viewed as an attempt to sabotage the government
ruling and some people must go for it.
Sequel to the rate
at which more sophisticated electrical/electronics gadgets are being
procured an installed in our homes, hospital and business premises,
there is a justifiable need for a faster and more reliable change over
system in an event of power outage.
In view of these
considerations, this project is aimed at designing and constructing a
workable automatic change-over switch with phase selector circuit which
switches on the load from National Electric Power Authority (NEPA) to a
generator when power comes back. Also when there is a phase failure in
any of the NEPA phase carrying the load, the change-over switch will be
changed to alternative phase.
1.3 SCOPE AND LIMITATION OF THE STUDY
The automatic change over switch is aimed to achieve the following automatic actions.
To start the generator
To change power to generator
To change back to NEPA
To change the generator
To change to alternative phase in case of phase failure.
The
automatic change over unit can be operated in single or three
phase-system. The automatic change over switch has the following
advantages.
i. It minimizes damage to lives/equipment since it
has its own monitoring system and its switching requires no human
contact with the switch, thus eliminating human error.
ii. It reduces its change-over timing to the minimum due to its fast response to power outage.
iii. It maintains high quality of service through its fast and prompt response
iv. It avoids and reduces fuel consumption since the generator is switch off immediately NEPA supply is restored.
Moreover
the size and capacity of the Unit will depend upon the load for which
it will be used. The Unit is also portable, easy, convenient and safe to
install.
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