Do you know what is Over-under voltage protector?

The ZYB3 Series voltage protector mainly used for residential household box entry or over-voltage,under-voltage or over-current protection of distribution lines for single-phase electrical equipment.

Its main feature is that the circuit has over-voltage or under-voltage, over-current condition,the product can cut off the power supply instantaneously to protect the electrical equipment from being damaged;  and the protector can automatically turn on the power supply when the circuit voltage returns to normal.