Multilayer discharge gap type surge protection device

Abstract

The invention relates to a multilayer discharge gap type surge protection device, which is suitable for overvoltage protection on an alternating-current or direct-current circuit. The multilayer discharge gap type surge protection device comprises n discharge gaps and n-1 trigger circuits, wherein n is an integer of being more than or equal to 2; the n discharge gaps are connected in series to form an overvoltage bleeder circuit; two ends of the overvoltage bleeder circuit are provided with connecting terminals, and the overvoltage bleeder circuit is used for connecting with a protected alternating-current or direct-current circuit; one end of each of the n-1 trigger circuits is respectively connected with a conductive member between the corresponding discharge gaps, and other ends of the n-1 trigger circuits are connected together and connected with the outer end part of the first discharge gap F1; and all the trigger circuits have same structure and are connected in parallel through a capacitor and a resistor to form an RC (Resistor-Capacitor) circuit.

Description

technical field [0001] The invention belongs to a surge protector for suppressing overvoltage, in particular to a multilayer discharge gap type surge protector, which is mainly used for suppressing lightning overvoltage, so as to protect various communication base stations, substations, and power electronic equipment from being directly struck by lightning or Lightning induced damage. Background technique [0002] The patent with the authorized announcement number of CN 100530868C discloses a high-efficiency laminated graphite discharge gap device, which includes N+1 discharge gaps and a π-shaped connection capacitor group composed of N capacitors with the same capacitance value, and each discharge gap is connected in series. A discharge gap F 1 Connect with live wire, the last discharge gap F N+1 Grounding, one end of each capacitor in the π-shaped connection capacitor group is connected to the conductive member between the two discharge gaps, and the other end is grounde...

AI Technical Summary

Problems solved by technology

Lightning strikes and lightning lasts an average of 3 to 4 impacts, and the impact time interval is 10 to 250ms, and the typical interval is 50ms. Under the overvoltage impact of lightning, the capacitor in the trigger circuit will be charged during the triggering process, In the trigger circuit composed of only capacitors, since the charges do not have a good discharge channel, they cannot be fully discharged within the interval of lightning strikes, so the residual charge will affect the next triggering of the surge protector, resulting in the ignition voltage of the surge protector. Elevation and job instability

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