If the voltage is too high or too low, the protector will cut off the power automatically.
Detailed introduction to SURGE POWER VOLTAGE PROTECTOR:
Application Refrigerator, Freezer Current Rating 15 Amps Start-up / Reconnect Wait Time 3 minutes Over Voltage connect 255 V Under Voltage Connect 180 V Interruption Response Time 20 milliseconds Max. Supply 350 V we also have 115v undervoltage 85v over voltage 135v