Lightning arrester generally refers to high-voltage lightning arrester, which is often used to protect high-voltage line transformers above 10kV.

Surge protectors are usually lightning arresters of low-voltage distribution systems, which are usually used to protect 220V/380V electrical equipment.

Fire extinguishers are mainly used to start in case of fire or fire to put out the fire.

According to different purposes, the design principles will be different.