Power lightning protector is also called surge protector (surge protector) (SPD for short), suitable for AC 50/60HZ, rated voltage 220V to 380V power supply system (or communication system), for indirect lightning and direct lightning It is suitable for the requirements of surge protection in households, tertiary industries and industrial fields. It has phase-to-phase, phase-to-earth, phase-to-neutral, neutral-to-earth and combinations of protection modes.