Surge Protectors Provide Direct And Indirect Lightning Protection For Power Facilities.

Direct lightning strikes represent the most severe events. Implementing the surge protective device system can mitigate the risk of direct strikes, particularly when lightning strikes overhead transmission lines near the user's service drop.
During such events, overhead transmission line voltages surge to hundreds of thousands of volts, typically causing insulation breakdown.

Lightning currents can travel one kilometer or more along power lines, with peak currents near the strike point reaching 100kA or higher.

At the user's service entrance, currents in low-voltage lines can reach 5kA to 10kA per phase.

In areas with frequent lightning activity, power facilities may experience multiple direct lightning strikes annually, generating severe lightning currents. Installing surge protector can reduce the frequency of lightning strikes on power facilities.

In areas using underground power cables or with infrequent lightning activity, such events are rare.

Indirect lightning strikes and internal surges occur more frequently, accounting for the vast majority of electrical equipment damage.

Therefore, surge protection device focuses on absorbing and suppressing this portion of surge energy.