Voltage fluctuations are common in many electrical systems. These fluctuations can occur due to various reasons, such as power grid issues, lightning strikes, or electrical appliances turning on and off. Such fluctuations can potentially damage sensitive electronic components within appliances like refrigerators.
A fridge guard typically works by monitoring the voltage supplied to the refrigerator. If it detects that the voltage is too high or too low (beyond safe levels), it disconnects the power supply to the refrigerator, thereby protecting it from potential damage. Once the voltage returns to a safe range, the fridge guard automatically restores power to the refrigerator.