YFY1 surge protector (hereinafter referred to as "protector ") is suitable for AC 50/60 Hz.420V and below TT, IT, TN-S, TN-C, TN-C-S and other power supply systems, to protect thepower grid due to lightning or surge overvoltage.

YFY1 surge protector (hereinafter referred to as "protector ") is suitable for AC 50/60 Hz.420V and below TT, IT, TN-S, TN-C, TN-C-S and other power supply systems, to protect thepower grid due to lightning or surge overvoltage.