ABSTRACT:
Phase absence is a very
common and severe problem in any industry, home or office. Many times one or
two phases may not be live in three phase supply. Because of this, many times,
some electrical appliances will be on in one room and OFF in another room. This
creates a big disturbance to our routine work.
This project is designed to
check the availability of any live phase, and the load will be connected to the
particular live phase only. Even a single phase is available, and then also,
the load will be in ON condition.
This project is designed
with AT89S52 MCU. This controller continuously checks for live condition of all
phases connected to it, and the controller connects the load to the active
phase using a Relay. This relay is driven with a transistor.
If two or three phases are
live, the load will be connected to phase I only. An LCD is provided to display
the status of the phase condition. Contrast control preset is given for LCD
contrast control.
BLOCK DIAGRAM
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