what is Over-voltage and Under-voltage Protector？

The over-voltage and under-voltage Protector is a crucial safety device in power systems, with its core function being real-time monitoring of voltage quality. When the grid voltage exceeds the normal operating range (such as overvoltage or undervoltage), it can respond quickly and automatically cut off the circuit, isolating the dangerous voltage supply and protecting downstream electrical equipment from damage.

After the voltage recovers to a safe standard, the protector can automatically reset to reconnect the power or restore power manually according to instructions. Its role is not limited to a single circuit; it can also be applied to main household Switches, industrial production lines, photovoltaic grid-connected systems, and charging piles, building a solid electrical safety line to prevent equipment burnout, fire hazards, and production shutdowns caused by abnormal voltage. It is an essential device to maintain the stability of power systems and the healthy operation of equipment.