Surge Protector Terminology
1. Air-termination system
Metal objects and metal structures that are used to directly receive or withstand lightning strikes, such as lightning rods, lightning strips (wires), lightning protection nets, etc.
2. Down conductor system
Metal conductor that connects the air-termination system to the grounding device.
3. Earth termination system
The sum of the grounding body and the grounding body connection conductor.
4. Earth electrode
Metal conductor buried in the ground and directly in contact with the earth. Also called grounding electrode. Various metal components, metal facilities, metal pipes, metal equipment, etc. that are directly in contact with the earth can also serve as grounding bodies, called natural grounding bodies.
5. Earth conductor
The connecting wire or conductor from the grounding terminal of the electrical equipment to the grounding device, or from the metal object that needs to be connected to the same potential, the main grounding terminal, the grounding summing plate, the main grounding bar, the equipotential connection bar to the grounding device.
6. Direct lightning flash
Lightning that directly strikes actual objects such as buildings, the earth or lightning protection devices.
7. Back flashover
The ground potential of the area changes when the lightning current passes through the grounding point or grounding system. Back flashover will cause the grounding system potential to change, which may cause damage to electronic equipment and electrical equipment.
8. Lightning protection system (LPS)
A system that reduces the damage caused by lightning to buildings, devices and other protection targets, including external and internal lightning protection systems.
8.1 External lightning protection system
The lightning protection part of the building (structure) outside or the main body is usually composed of lightning arresters, down conductors and grounding devices, which are used to prevent direct lightning strikes.
8.2 Internal lightning protection system
The lightning protection part inside the building (structure) is usually composed of equipotential connection system, common grounding system, shielding system, reasonable wiring, surge protector, etc., which is mainly used to reduce and prevent the electromagnetic effects generated by lightning current in the protection space.
