Lightning protection device is a type of low voltage high resistance open circuit state and high voltage low resistance short circuit state. It can withstand high currents of hundreds of amperes through a combination of overvoltage protection electronic devices connected in parallel to the power line and signal transmission line. When encountering lightning strikes, high voltage, and high current, a short circuit immediately occurs. At the same time, disconnect the main power switch to protect the computer equipment. When it is installed in series, its physical surface shape and signal lightning arrester require low high-frequency signal loss.

The internal gap of the lightning arrester is placed inside the arc extinguishing tube made of gas producing material, and the external gap separates the arc extinguishing tube from the power grid.

Lightning overvoltage causes discharge in the internal and external gaps, and the high temperature of the internal gap arc causes gas to be produced from the gas producing substance. The pressure inside the pipeline rapidly increases, and high-pressure gas is sprayed out from the nozzle to extinguish the arc. Tube type lightning arrester has a large surge current capacity and can be used in places with large lightning current amplitudes. However, due to the high and dispersed discharge voltage of MOA, its waveform interception and protection performance are poor. Mainly used for incoming line protection and weak insulation protection of substations and power plants.

Basic characteristics

1. The protection flow is large, the residual voltage is quite low, and the response time is fast;

2. Adopt new arc extinguishing technology to prevent fires;

3. Adopting temperature control protection circuit with built-in thermal protection;

4. Equipped with power status indicator, indicating the working status of surge protector;

5. Rigorous structure, stable and reliable work;

Lightning protection includes external lightning protection and internal lightning protection. External lightning protection mainly consists of lightning arresters (lightning rods, lightning nets, lightning strips, lightning wires), down conductors, and grounding devices. Their main function is to ensure that the building is protected from direct lightning strikes, and to release lightning that may hit the building into the ground through lightning rods (strips, nets, wires), down conductors, etc. Internal lightning protection includes measures for lightning induction, line surge, ground potential counterattack, lightning wave invasion, and electromagnetic and electrostatic induction. The basic method is to use equipotential bonding, including direct connection and indirect connection through SPD, to form a conditional equipotential body between the metal body, equipment circuit and the ground, and to discharge the internal facilities induced by lightning strikes and other surges into the ground, thereby protecting personnel and equipment inside the building.