CN202797959U - Lightening protection device of grounding-free optical modem with equipotential connection - Google Patents
Lightening protection device of grounding-free optical modem with equipotential connection Download PDFInfo
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- CN202797959U CN202797959U CN 201220400353 CN201220400353U CN202797959U CN 202797959 U CN202797959 U CN 202797959U CN 201220400353 CN201220400353 CN 201220400353 CN 201220400353 U CN201220400353 U CN 201220400353U CN 202797959 U CN202797959 U CN 202797959U
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- gas discharge
- discharge tube
- resistance
- utmost point
- protection module
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Abstract
The utility model discloses a lightening protection device of a grounding-free optical modem with equipotential connection. The lightning protection device comprises a power supply protection module and at least one telephone line protection module. The telephone line protection module comprises a tripolar gas discharge tube, wherein two outer-side poles of the triode gas discharge tube are respectively connected to telephone line interfaces (RJ11). The power supply protection module comprises a single-phase balance circuit composed of a variostor (TMOV1), a variostor (TMOV2) and a gas discharge tube (G1), wherein the variostors TMOV1 and TMOV2 are connected in series and then are connected between a phase line (L) and a neutral line (N) of a power supply module; one pin of the gas discharge tube (G1) is connected between the two variostors, and the other pin of the gas discharge tube (G1) is connected with a middle pole of the tripolar gas discharge tube. The lightening protection device enables a power supply port and a telephone line port of the optical modem to be designed into equiopotential connection, and solves problems of common mode and differential mode protection of one side of the telephone line and the power supply when no local grounding points are provided.
Description
Technical field
The utility model relates to the optical modem in the Internet.
Background technology
Optical fiber communication is because its remarkable advantage; more and more used now; need in the man of family of domestic consumer by optical modem incoming fiber optic signal; when telephone line interface uses in some family in the optical modem; a lot of very long telephone wires can be pulled out, at this time just lightning protection need to be carried out.General effective lightning protection measures is direct ground connection now, and in the user Internet access broadband, for each optical modem goes to carry out special ground connection work, its difficulty and cost are very large.So how the lightning protection capability of simple and effective raising optical modem just seems very important.
The utility model content
The purpose of this utility model is to suffer the problem of lightning damage in order easy, economical, effectively to have solved vast communication user optical modem, the apparatus for preventing thunderbolt of exempting from the ground connection optical modem that provides a kind of equipotential to connect.
In order to achieve the above object, the utility model is by the following technical solutions:
A kind of equipotential connects exempts from ground connection optical modem apparatus for preventing thunderbolt; comprise power source protective module and at least one telephone wire protection module; the telephone wire protection module comprises three utmost point gas discharge tubes; the two poles of the earth, the outside of three utmost point gas discharge tubes are connected on respectively on the telephone line interface RJ11; described power source protective module comprises by piezo-resistance TMOV1; the monophase equilibrium circuit that piezo-resistance TMOV2 and gas discharge tube G1 form; be attempted by between the phase line L and neutral line N of power module after piezo-resistance TMOV1 and the piezo-resistance TMOV2 series connection; the pin of gas discharge tube G1 is connected between two piezo-resistances, and another pin connects three utmost point gas discharge tube interpoles.
Described telephone wire protection module is two, telephone wire protection module 1 and telephone wire protection module 2, telephone wire protection module 1 comprises three utmost point gas discharge tube G2, the two poles of the earth, the outside of three utmost point gas discharge tube G2 are connected on respectively on the telephone line interface RJ11, the pin of gas discharge tube G1 is connected between two piezo-resistances, and another pin connects three utmost point gas discharge tube G2 interpoles; Telephone wire protection module 2 comprises three utmost point gas discharge tube G3; the two poles of the earth, the outside of three utmost point gas discharge tube G3 are connected on respectively on the telephone line interface RJ11; the pin of gas discharge tube G1 is connected between two piezo-resistances, and another pin connects three utmost point gas discharge tube G3 interpoles.
Described telephone wire protection module 1 is connected with differential mode protective circuit 1, and telephone wire protection module 2 is connected with differential mode protective circuit 2; Differential mode protective circuit 1 is comprised of resistance R 1, resistance R 2 and solid discharging tube SAD1, and resistance R 1, R2 are connected in respectively on the telephone line interface RJ11, and three utmost point gas discharge tube G2 are attempted by resistance R 1, R2 front end, and solid discharging tube SAD1 is attempted by resistance R 1, R2 rear end; Differential mode protective circuit 2 is comprised of resistance R 3, resistance R 4 and solid discharging tube SAD2, and resistance R 3, R4 are connected in respectively on the telephone line interface RJ11, and three utmost point gas discharge tube G3 are attempted by resistance R 3, R4 front end, and solid discharging tube SAD2 is attempted by resistance R 3, R4 rear end.
Described power source protective module also comprises the working indicating that is comprised of resistance R 0, diode D1, light-emitting diode L1 and inductance L 0.
Equipment of the present utility model can form modular guard to optical modem, and power port is designed to equipotential with telephone line port and is connected.Solved this locality without the earth point situation under, the common and different mode protection question of telephone wire leading-out terminal and power supply has promoted the common and different mode protective capacities, effectively protects optical modem not to be damaged.
Description of drawings
Fig. 1 is schematic diagram of the present utility model.
Embodiment
Such as Fig. 1, a kind of equipotential connects exempts from ground connection optical modem apparatus for preventing thunderbolt, comprise power source protective module and at least one telephone wire protection module, the quantity of the telephone wire that the quantity of telephone wire protection module is pulled out is as required come fixed, present embodiment has two telephone wire protection modules, telephone wire protection module 1 and telephone wire protection module 2, telephone wire protection module 1 comprises three utmost point gas discharge tube G2, the two poles of the earth, the outside of three utmost point gas discharge tube G2 are connected on respectively on the telephone line interface RJ11, the pin of gas discharge tube G1 is connected between two piezo-resistances, and another pin connects three utmost point gas discharge tube G2 interpoles; Telephone wire protection module 2 comprises three utmost point gas discharge tube G3; the two poles of the earth, the outside of three utmost point gas discharge tube G3 are connected on respectively on the telephone line interface RJ11; the pin of gas discharge tube G1 is connected between two piezo-resistances, and another pin connects three utmost point gas discharge tube G3 interpoles.
The two-stage differential mode protective circuit of telephone wire protection module is carried out clamper to the voltage of the telephone line output end of optical modem, plays a protective role.
Power source protective module comprises the monophase equilibrium circuit that is comprised of piezo-resistance TMOV1, piezo-resistance TMOV2 and gas discharge tube G1; be attempted by between the phase line L and neutral line N of power module after piezo-resistance TMOV1 and the piezo-resistance TMOV2 series connection; the pin of gas discharge tube G1 is connected between two piezo-resistances, and another pin connects respectively three utmost point gas discharge tube G2 and three utmost point gas discharge tube G3 interpoles.Gas discharge tube G1 and three utmost point gas discharge tube G2 and three utmost point gas discharge tube G3 form the common mode protective circuit, realize that the equipotential between the network signal inlet wire of power line and optical modem is connected.The common mode thunder-strike current is released to the neutral earthing end of far-end power transformer by gas discharge tube G1, piezo-resistance TMOV1 or the piezo-resistance TMOV2 of power source protective module like this.
Access telephone wire protection module between optical modem and telephone wire output line; between optical modem and power module, access power source protective module; the two poles of the earth, the outside of three utmost point gas discharge tube G2 and three utmost point gas discharge tube G3 are connected on respectively on the telephone line interface RJ11; the pin of gas discharge tube G1 is connected between two piezo-resistances, and another pin connects respectively the interpole of three utmost point gas discharge tube G2 and three utmost point gas discharge tube G3.
When not running into thunderbolt; optical modem normally uses; the telephone signal of phone line end is equivalent to directly skip phone line end protection module; three utmost point gas discharge tube G2 and solid discharging tube SAD1; and three utmost point gas discharge tube G3 and solid discharging tube SAD2 all be in open-circuit condition; signal directly passes through resistance R 1, R2 or resistance R 3, R4 out; this moment three utmost point gas discharge tube G2 and solid discharging tube SAD1, and three utmost point gas discharge tube G3 and solid discharging tube SAD2 play the effect of differential mode protection.
Power end is to skip power source protective module equally, and optical modem is directly received on the 220V power supply by power supply adaptor.This moment, gas discharge tube G1 was in open-circuit condition.
When suffering from thunderbolt, thunderbolt voltage is excessive, three utmost point gas discharge tube G2, three utmost point gas discharge tube G3 and gas discharge tube G1 have been punctured, so that three utmost point gas discharge tube G2, three utmost point gas discharge tube G3 and gas discharge tube G1 conducting, thunder-strike current is just by three utmost point gas discharge tube G2, gas discharge tube G1, piezo-resistance TMOV1 or piezo-resistance TMOV2, and by three utmost point gas discharge tube G3, gas discharge tube G1, piezo-resistance TMOV1 or piezo-resistance TMOV2, release to the neutral earthing end of far-end power transformer.
The utility model technology in use need not optical modem is carried out special grounding construction; but phone line end and the power end of optical modem all coupled together by gas discharge tube; carry out the common mode protection; realize that power line is connected with equipotential between the optical modem telephone wire; and all be connected on the neutral earthing end of far-end power transformer; like this no matter when being power end or phone line end generation thunder-strike current; can release by the earth terminal of far-end power transformer smoothly and drain, thereby play effective protective effect.
In addition, power source protective module also comprises the working indicating that is comprised of resistance R 0, diode D1, light-emitting diode L1 and inductance L 0.Under normal circumstances, the light-emitting diode L1 of working indicating is bright, when breaking down, piezo-resistance TMOV1 and piezo-resistance TMOV2 lost efficacy, and electric current no longer passes through light-emitting diode L1, and light-emitting diode L1 does not just work, represent that this thunder resisting equipment lost efficacy, need to change.
Claims (4)
1. an equipotential connects exempts from ground connection optical modem apparatus for preventing thunderbolt; it is characterized in that; comprise power source protective module and at least one telephone wire protection module; the telephone wire protection module comprises three utmost point gas discharge tubes; the two poles of the earth, the outside of three utmost point gas discharge tubes are connected on respectively on the telephone line interface RJ11; described power source protective module comprises by piezo-resistance TMOV1; the monophase equilibrium circuit that piezo-resistance TMOV2 and gas discharge tube G1 form; be attempted by between the phase line L and neutral line N of power module after piezo-resistance TMOV1 and the piezo-resistance TMOV2 series connection; the pin of gas discharge tube G1 is connected between two piezo-resistances, and another pin connects three utmost point gas discharge tube interpoles.
2. a kind of equipotential according to claim 1 connects exempts from ground connection optical modem apparatus for preventing thunderbolt, it is characterized in that, described telephone wire protection module is two, telephone wire protection module 1 and telephone wire protection module 2, telephone wire protection module 1 comprises three utmost point gas discharge tube G2, the two poles of the earth, the outside of three utmost point gas discharge tube G2 are connected on respectively on the telephone line interface RJ11, and the pin of gas discharge tube G1 is connected between two piezo-resistances, and another pin connects three utmost point gas discharge tube G2 interpoles; Telephone wire protection module 2 comprises three utmost point gas discharge tube G3; the two poles of the earth, the outside of three utmost point gas discharge tube G3 are connected on respectively on the telephone line interface RJ11; the pin of gas discharge tube G1 is connected between two piezo-resistances, and another pin connects three utmost point gas discharge tube G3 interpoles.
3. a kind of equipotential according to claim 2 connects exempts from ground connection optical modem apparatus for preventing thunderbolt, it is characterized in that described telephone wire protection module 1 is connected with differential mode protective circuit 1, and telephone wire protection module 2 is connected with differential mode protective circuit 2; Differential mode protective circuit 1 is comprised of resistance R 1, resistance R 2 and solid discharging tube SAD1, and resistance R 1, R2 are connected in respectively on the telephone line interface RJ11, and three utmost point gas discharge tube G2 are attempted by resistance R 1, R2 front end, and solid discharging tube SAD1 is attempted by resistance R 1, R2 rear end; Differential mode protective circuit 2 is comprised of resistance R 3, resistance R 4 and solid discharging tube SAD2, and resistance R 3, R4 are connected in respectively on the telephone line interface RJ11, and three utmost point gas discharge tube G3 are attempted by resistance R 3, R4 front end, and solid discharging tube SAD2 is attempted by resistance R 3, R4 rear end.
4. a kind of equipotential according to claim 3 connects exempts from ground connection optical modem apparatus for preventing thunderbolt; it is characterized in that described power source protective module also comprises the working indicating that is comprised of resistance R 0, diode D1, light-emitting diode L1 and inductance L 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220400353 CN202797959U (en) | 2012-08-13 | 2012-08-13 | Lightening protection device of grounding-free optical modem with equipotential connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220400353 CN202797959U (en) | 2012-08-13 | 2012-08-13 | Lightening protection device of grounding-free optical modem with equipotential connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202797959U true CN202797959U (en) | 2013-03-13 |
Family
ID=47825135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220400353 Expired - Lifetime CN202797959U (en) | 2012-08-13 | 2012-08-13 | Lightening protection device of grounding-free optical modem with equipotential connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202797959U (en) |
-
2012
- 2012-08-13 CN CN 201220400353 patent/CN202797959U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |