Descriptions:  1.Automatic over-voltage protection device is suitable for single-phase AC voltage 230V, 50/60Hz, rated working current 63A and below users or loads.When the power situation is unstable, it's protection function will be automatically activated.   2.It is mainly used for the protection of over-voltage, under-voltage or over-current in the distribution line of residential household box or the protection of single-phase power equipment.  3.Its main feature is overvoltage or undervoltage in the line, overcurrent condition, the product can cut off the power supply instantaneously, protect the electrical equipment from being damaged; when the line voltage returns to normal, the protector can automatically turn on the power supply normally.    Features:   1.Stable Performence:The circuits boards of products adopt good quality electronic components with longer service life and more reliable performance.  2.Easy Installation:35mm standard guide rail installation,easy to mount.  3.Simple Operation:The automatic recovery over voltage and under voltage protective device complies with modular design standards, and its use and maintenance are very simple.  4.Signal Light:The green indicator display, when the power is normal supply. The red indicator display, when the power over voltage or under voltage.  5.Function:Once the voltage exceeds the limited range of products, it will automatically cut off so as to protect the safely of electrical equipment and persons. The device will re-supply, when the power returns to normal.    Specifications:   Rated AC Voltage: 230V AC 50Hz/60Hz;  Passing Max Current: 40A;  Over-voltage Cut-off Value: >270VAC+/-5V;  Under-voltage Cut-off Value: <170VAC+/-5V;  Off-time: ≤ 1s;  Recovery Time: ≤60s;  Over-voltage Protection: Yes;  Under-voltage Protection: Yes;  Automatic Recovery: Yes;  Installing: 35mm Din Rail;  Size: 77x27x65mm/3.03x1.06x2.56in;  Color: White;  Package Size: 97x97x85mm/3.82x3.82x3.35in;  Package Weight: 119g/4.165oz;    Package Included:  1 x Voltage Protector