Overvoltage protection

In electric and electronic circuits, when an abnormal voltage exceeding the rated value is detected at the sensing part of the circuit, the output is stopped by interrupting the circuit to protect the secondary circuit. This mechanism is synonymous with OVP. Some systems automatically recover once the cause of the overvoltage is removed, while others require manual recovery after a safety check. Overvoltage protection functions are widely used, from power transmission and distribution circuits handling high power to electronic circuits dealing with low power. In transmission and distribution circuits, overvoltage protection also plays an important role in preventing electrical accidents such as electric shocks.