Abrégé

A surge protective device includes a first electrode terminal and a second electrode terminal; n gap units, connected in series between the first electrode terminal and the second electrode terminal sequentially, where a common terminal is formed between adjacent gap units; k first trigger circuits, the k first trigger circuits each include a first terminal connected to one of the common terminals, and a second terminal connected to the second electrode terminal; and m second trigger circuits, the m second trigger circuits each include a first terminal connected to one of the common terminals, and a second terminal connected to the first electrode terminal, where any one of the common terminals is connected only to either the first terminal of one of the first trigger circuits or the first terminal of one of the second trigger circuits.

Classes IPC  ?

• H02H 9/06 - Circuits de protection de sécurité pour limiter l'excès de courant ou de tension sans déconnexion sensibles à un excès de tension utilisant des éclateurs à étincelles
• H02H 9/04 - Circuits de protection de sécurité pour limiter l'excès de courant ou de tension sans déconnexion sensibles à un excès de tension

Abrégé

A surge protection circuit, comprising: a varistor, a gas discharge tube, a transient diode, a boosted circuit and a rectifying circuit. A current of the transient diode is collected by means of the boosted circuit, and a high voltage is generated; then by means of the rectifying circuit, the high voltage is rectified into a trigger high voltage capable of triggering the gas discharge tube, the gas discharge tube can thus be triggered to switch on, such that a high current is discharged by means of the varistor in series connection with a gas discharge tube branch at moments of thunder, lightning and the like. It is thus clear that by adopting the present solution, the transient diode has fast response speed under impact of thunder and lightning currents; while discharging parts of the thunder and lightning currents, the currents are collected, and by means of the boosted circuit and the rectifying circuit triggering the varistor in series connection with a gas discharge tube branch, most of the thunder and lightning currents are discharged. In addition, the present solution does not require an inductor, and the circuit is small in size; without an inductor consuming energy, and power consumption of the whole surge protection circuit is reduced. Besides, the transient diode in the present solution has the function of clamp voltage, and a limiting voltage of a surge protective device can be reduced.

Classes IPC  ?

• H02J 9/04 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve

Abrégé

The invention relates to a high-safety surge protective device which comprises a casing, at least one overvoltage protection component inside the casing, a release unit used to separate the overvoltage protection component from the AC or DC circuit or the equipment, an arc suppressing apparatus used to suppress electric arc generated while separating the overvoltage protection component from the AC or DC circuit or the equipment, and a box, Wherein: the release unit comprises a compression spring, a metal dome, a slide and a soft conductor; the arc suppressing apparatus comprises an arc chute assembly, a first arc striking sheet, a second arc striking sheet, a turning block and a torsional spring.

Classes IPC  ?

• H01H 33/08 - Éléments fixes pour restreindre ou subdiviser l'arc, p. ex. plaques-barrières
• H01H 33/42 - Mécanismes moteurs

Abrégé

A high-security surge protection device comprises a shell, at least one over voltage protection element disposed inside the shell, a release device used for separating the over voltage protection element from an alternating current or a direct current circuit or device, an arc-control device and a box body that are used for extinguishing an electric arc generated in a process of separating the over voltage protection element from the alternating current or the direct current circuit or device. The release device is formed by a pressure spring, a metal spring sheet, a sliding block, and a soft conductor. The arc-control device is formed by an arc-control grid sheet group, a first arc striking sheet, a second arc striking sheet, a rotation block, and a torsional spring. The rotation block is a strip-shaped block, an electric arc reflecting plate is arranged on one end portion of the rotation block, an installation hole is formed in the other end portion of the rotation block, and an arc-control cavity is formed in the position, close to the electric arc reflecting plate, of the rotation block. The arc-control grid sheet group is installed in an arc-control chamber surrounded by the box body and the shell. One end of the first arc striking sheet is connected to or close to a left end of the arc-control grid sheet group, and one end of the second arc striking sheet is connected to or close to a right end of the arc-control grid sheet group.

Classes IPC  ?

• H01H 83/10 - Interrupteurs de protection, p. ex. disjoncteur ou relais de protection actionné par des conditions électriques anormales autres que seulement les courants excessifs actionnés par une tension excessive, p. ex. pour la protection contre la foudre
• H01H 71/20 - Mécanismes électrothermiques avec masse fusible
• H01H 9/34 - Éléments fixes pour restreindre ou sous-diviser l'arc, p. ex. plaques-barrières