Isolating-type bidirectional communication signal lighting protection device

Abstract

The invention relates to the technical field of lighting protection devices, and discloses an isolating-type bidirectional communication signal lighting protection device. The isolating-type bidirectional communication signal lighting protection device comprises a lighting protection circuit, an active isolating circuit and a power supply circuit. The lighting protection circuit comprises a first gas discharge tube GDT1, a second gas discharge tube GDT2, high-speed rectifier tubes D3, a transient voltage suppressor TVS and a current-limiting resistor R1. All signals are connected with the isolating input end reference ground GND2 through the first gas discharge tube GDT1 and the transient voltage suppressor TVS respectively and connected with the lighting protection ground through the second gas discharge tube GDT2, the current-limiting resistor R1 is connected between the first gas discharge tube GDT1 and the transient voltage suppressor TVS in series, and the high-speed rectifier tubes D3 are connected with the first gas discharge tube GDT1 in a star-shaped mode. The active isolating circuit comprises magnetic coupling signal transceiver U1, a signal transceiver U2 and monostable triggers U3. According to the isolating-type bidirectional communication signal lighting protection device, several-ten-of-thousand-of-volt lightning induction is reduced to hundred-of-volt pulse voltage through the lighting protection circuit, the hundred-of-volt pulse voltage is then reduced to power supply voltage through the active isolating circuit, and therefore residual voltage of the product is minimized.

Description

technical field [0001] The invention relates to the technical field of lightning protectors, in particular to an isolated two-way communication signal lightning protector. Background technique [0002] The existing lightning protection technology uses nonlinear components to limit the voltage difference between the lines to a certain level. However, since all components have a certain action time, when the lightning induction arrives, the lines of the lightning protection device are still connected to each other. A pulse voltage of extremely high voltage will be formed that cannot be eliminated; eventually resulting in failure of product protection. Therefore, it is necessary to design a lightning protector with a new structure to solve the problems in the prior art. Contents of the invention [0003] The object of the present invention is to provide an isolated two-way communication signal lightning protector capable of eliminating pulse voltage. [0004] In order to so...

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Problems solved by technology

[0002] The existing lightning protection technology uses nonlinear components to limit the voltage difference between the lines to a certain level. However, since all components have a certain action time, when the lightning induction arrives, the lines of the lightning protection device are still connected to each other. Will form a pulse voltage with extremely high voltage that cannot be eliminated; eventually lead to failure of product protection

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