CN201001034Y

CN201001034Y - Connection type signal lightning arrester

Info

Publication number: CN201001034Y
Application number: CNU2007201053321U
Authority: CN
Inventors: 陈广赢
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-01-05
Filing date: 2007-01-05
Publication date: 2008-01-02
Anticipated expiration: 2017-01-05

Abstract

The utility model relates to a wiring type signal arrester, which comprises a circuit board, wherein an input end connected with an input wire cable and an output end connected with an equipment end are arranged on the circuit board, a base protection circuit and a fine protection circuit are arranged between the input end and the output end, the fine protection circuit comprises three TVS tubes, the three TVS tubes are connected in star way, two TVS tubes are connected with a main loop in parallel, the other TVS tube is connected to earth, the wiring type signal arrester also comprises a temperature fuse wire, the temperature fuse wire is connected with the TVS tubes in series which is connected with a main loop in parallel. The utility model provides a wiring type signal arrester, which can be automatically separated from the main loop after the TVS tubes are out of work and has high security.

Description

Wiring type signal lightning arrester

(1) technical field

The utility model relates to a kind of surge protective device, especially a kind of signal lightning arrester that can break away from major loop after inefficacy automatically.

(2) background technology

Line formula signal lightning arrester is widely used in the protection of twisted-pair feeder or control line; existing Wiring type signal lightning arrester is behind ageing failure; might there be the short circuit phenomenon between line and the line; concurrent hot polymerization energy collecting; thereby cause the combustion phenomena that may cause; this is short circuit phenomenon mainly due to the fast diode that uses in the signal lightning arrester after inefficacy, may cause short circuit between line and the line, causes serious consequences such as distorted signals, control is not normal, system is out of control.Therefore, key is that the signal lightning arrester can break away from major loop automatically after inefficacy.

Existing Wiring type signal lightning arrester adopts and slightly protects the mode that combines with meticulous protection; the heavy-current discharge pipe is adopted in thick protection; the TVS pipe is adopted in meticulous protection; middle resistance or the inductance of adopting separated the lotus root device; discharge tube with separate the lotus root device under impulse current; life-span is longer; can after inefficacy, not exert an influence to system yet; therefore can consider discharge tube and the automatic disengaging major loop problem of separating the lotus root device; it mainly is that the TVS pipe of meticulous protection will break away from major loop after inefficacy that lightning arrester will break away from major loop; three TVS pipes are arranged as shown in Figure 1; behind the TVS tube failure; energy also can't be concentrated, and can't realize realizing breaking away from automatically with major loop by the Thermal Cutoffs mode.

(3) summary of the invention

In order to overcome existing signal lightning arrester behind the TVS tube failure, can not break away from major loop, have the deficiency of potential safety hazard, it is a kind of behind the TVS tube failure that the utility model provides, and can break away from major loop, safe Wiring type signal lightning arrester automatically.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of Wiring type signal lightning arrester; comprise wiring board; described wiring board is provided with and imports the input that cable is connected, the output that is connected with equipment end; be provided with thick protective circuit, meticulous protective circuit between described input and the output; described meticulous protective circuit comprises three TVS pipes; be star between three TVS pipes and connect mode; two TVS pipes are in parallel with major loop; another root TVS manages ground connection; described Wiring type signal lightning arrester also comprises Thermal Cutoffs, and described Thermal Cutoffs is connected with the TVS pipe that major loop is connected in parallel.

Further, described three TVS manage direct level or are arranged vertically in the circuit board.

Further again, between two TVS pipes, arrange the axialmode Thermal Cutoffs respectively.

Technical conceive of the present utility model is: at the problem of prior art existence, when the key of this problem is that mA level electric current is managed by TVS, can be by layout and a kind of concentration of energy device of TVS pipe on the pcb board, mA level electric current is accumulated certain energy, then by the automatic disengaging of temperature control realization with major loop.

Be short-circuit condition behind the VS tube failure, cause heating, energy accumulating, and conduction gives the nearly axialmode Thermal Cutoffs that pastes, after energy reaches the Thermal Cutoffs striking point, Thermal Cutoffs fusing, realizes meticulous protection partly with the automatic disengaging of major loop.

What existing Wiring type signal lightning arrester fine portion had is not connected in series Thermal Cutoffs between TVS pipe and major loop, though what have has been connected in series Thermal Cutoffs, but do not show arranged as figure two, energy behind the TVS tube failure is difficult to concentrate, Thermal Cutoffs fails effectively to play a role, can't realize and the automatic disengaging of major loop after causing TVS to lose efficacy, may cause short circuit between line and the line, cause serious consequences such as distorted signals, control is not normal, system is out of control.

The utility model has overcome existing technology prejudice, between TVS pipe and major loop, be connected in series Thermal Cutoffs, and press as Fig. 2 mode arranged, solved the automatic disengaging problem that can't realize after TVS lost efficacy, and solved short circuit between the line that may cause and the line and cause problems such as distorted signals, control is not normal, system is out of control with major loop.

The beneficial effects of the utility model mainly show: 1, behind the TVS tube failure, can break away from major loop automatically; 2, strengthened fail safe.

(4) description of drawings

Fig. 1 is the structure chart of the signal lightning arrester of prior art.

Fig. 2 is the structure chart of signal lightning arrester of the present utility model.

(5) embodiment

Below in conjunction with accompanying drawing the utility model is further described.

With reference to Fig. 2; a kind of Wiring type signal lightning arrester; comprise wiring board; described wiring board is provided with and imports the input that cable is connected, the output that is connected with equipment end; be provided with thick protective circuit 1, meticulous protective circuit 2 between described input and the output; described meticulous protective circuit 1 comprises three TVS pipes 3; be star between three TVS pipes and connect mode; two TVS pipes are in parallel with major loop; another root TVS manages ground connection; described Wiring type signal lightning arrester also comprises Thermal Cutoffs 4, and TVS described and that major loop is connected in parallel manages and Thermal Cutoffs 4 is connected.

TVS manages 3 direct levels or is arranged vertically in the circuit board, arranges axialmode Thermal Cutoffs 4 between two TVS pipes respectively.

Between TVS pipe 3 and major loop, be connected in series Thermal Cutoffs 4, and press as Fig. 2 mode arranged, solved the automatic disengaging problem that can't realize after TVS lost efficacy, and solved short circuit between the line that may cause and the line and cause problems such as distorted signals, control is not normal, system is out of control with major loop.

Claims

1, a kind of Wiring type signal lightning arrester; comprise wiring board; described wiring board is provided with and imports the input that cable is connected, the output that is connected with equipment end; be provided with thick protective circuit, meticulous protective circuit between described input and the output; described meticulous protective circuit comprises three TVS pipes; be star between three TVS pipes and connect mode; two TVS pipes are in parallel with major loop; another root TVS manages ground connection; it is characterized in that: described Wiring type signal lightning arrester also comprises Thermal Cutoffs, and described Thermal Cutoffs is connected with the TVS pipe that major loop is connected in parallel.

2, Wiring type signal lightning arrester as claimed in claim 1 is characterized in that: described three TVS manage direct level or are arranged vertically in the circuit board.

3, Wiring type signal lightning arrester as claimed in claim 1 or 2 is characterized in that: arrange the axialmode Thermal Cutoffs respectively between two TVS pipes.