Background: Due to the aging of the power grid lines in an old residential area, there are frequent voltage surges (such as lightning strikes causing momentary high voltage), which have repeatedly burned down household appliances such as refrigerators and air conditioners, leading to neighborhood disputes and property losses.
Solution: Install Zhongzhe voltage protectors with overvoltage protection, undervoltage protection, and delayed start function in residents' homes. When the voltage exceeds the safe range (such as 220V ± 10%), the protector quickly cuts off the power supply; After the voltage returns to normal, it will automatically close after a delay of 30 seconds to avoid instantaneous current impact on the electrical appliance.
Effect: Successfully avoided abnormal voltage damage to electrical appliances caused by three lightning strikes, reduced maintenance costs for residents, and improved household electricity safety.