Over voltage protection is a power supply feature which shuts down the supply, or clamps the output, when the voltage exceeds a preset level. ... An over-voltage condition might occur in the power supply due faults inside the supply, or from external causes such as those in the distribution lines.

What is meant by overvoltage?

1 : the excess potential required for the discharge of an ion at an electrode over and above the equilibrium potential of the electrode. 2 : voltage in excess of the normal operating voltage of a device or circuit.

What happens overvoltage?

The overvoltage can cause excessive current to flow as well as creating excessive voltage stresses. In both cases, the electrical insulation system inside the motor or equipment can be degraded reducing life or causing damage.