This protection circuit acts as a voltage regulator and also circuit breaker, we have 5v load and hence we have used 5.1v zener diode, you can choose zener diode voltage range depends on your load or device voltage range.
Over under voltage protection circuit diagram.
A very simple dc over voltage protector circuit is shown below.
The working of the circuit is discussed further below.
Over voltage protection circuit diagram based on relay.
The voltage to less than 90 percent or 0.90pu at the power under voltage and over current protecting device is shown in frequency for a time period longer than 1 min.
It causes a major loss for industries, offices and homes.
The preset value is the rated value of the zener diode connected to the circuit.
This is a safety device to overvoltage.
This circuit disconnects the output when the voltage exceeds the preset level.
Although the circuit looks complex, it comprises of building block you have been familiar with.
Under the block diagram below voltages are the result of switching events that are the opposite of the events that cause over voltage.
You can even change the zener diode according to your suitable voltage value.
The complete circuit diagram for our main over voltage protection is given below.
Circuit diagram showing high side switch working of battery over discharge protection the other case can be when the terminal voltage of battery can be below 6.2 v.
Circuit diagram of over voltage and under voltage protection system using timer.
It requires fewer components and is very effective in overvoltage conditions.
The circuit diagram of “auto cut circuit for over and under voltage” is shown in figure 1.
Automatic equipment disconnect when the power cross the level of a fixed voltage.
Auto selection of any available phase, in 3 phase supply system home appliances control with delay switch.