Over Under Voltage Protection Circuit Diagram

Over voltage protection using timers circuit operation.

Over under voltage protection circuit diagram.

Short circuit protection reverse polarity protection and over under voltage protection are some of the protection circuits that are used to protect any electronic appliance or circuit from any sudden mishappenings. Over voltage and under voltage protection circuit for high and low voltage cutoff. We use primary coil transformer is 380 volts to protect them not damaged by too over voltage. The entire circuit is powered with rectified dc supply but the regulated power is connected to timers and unregulated power is connected to potentiometers to get the variable voltage.

Both the timers are configured to work as comparators i e as long as the input present at the pin2 of timer is less positive than 1 3 vcc then the. When the input voltage goes high then the relay will be activated and also when the input voltage is below then required level then relay activated. Generally fuse or mcb is used for overvoltage protection however in this project our aim is to make a circuit which can perform better than a fuse or mcb and overcome the. For the lower voltage you can see some flickers in the lights and for the higher voltage one the circuit will be fully damaged.

This is because of the high potential. This voltage sensor circuit can be used to protects any appliance to voltage fluctuation. Protection circuits like reverse polarity protection short circuit protection and over under voltage protection are used to protect any electronic appliance or circuit from any sudden mis happening generally fuse or mcb is used for overvoltage protection here in this circuit we will build an overvoltage protection circuit without using fuse.