Wenzhou Modern Group is the best China surge protector manufacturer and supplier, as a professional company, we have our own factory. Welcome to wholesale surge protector, surge arrester, surge protector, surge suppressor, surge protective device, surge protection products from us. We present DFL series surge protector to prevent critical electrical devices from high danger of loss when lightning occurs in 220V single phase and 380V three phase systems. It employs advanced lightning protection technique of world and high quality device for lightning protection and assembled with sophisticated process.As the power line is attacked by lightning, the induced huge pulse current and high surge over-voltage at the power line can instantaneously release into earth, therefore the modern electronic equipments have effectively protected from lightning. http://www.wzmodern.com