OVER VOLTAGE OR UNDER VOLTAGE
TRIPPING MECHANISM
ABSTRACT
The aim of this project is to
develop a low voltage and high voltage tripping mechanism to protect the load
from damage. The fluctuation in AC mains supply is frequent in homes and
industries. The sensitive electronic devices in these conditions can get easily
damaged. It is preferable to have a tripping mechanism to protect the load.
This
proposed system will trip the load in the event of the input voltage falling
below/above a set value. Two 555 timers are used as window comparator. This
delivers an error output if the input voltage to them crosses the range beyond
the voltage window. A relay is then operated to cutoff the load for safety
reasons. A lamp is used as load in this project.
The
concept in future can be extended by integrating an alarm, which sounds when
voltage fluctuations occur. It can also be interfaced with a GSM modem to
convey alert message to the user via SMS
to take appropriate action.
BLOCK DIAGRAM:
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