CN201821095U - Signal surge protection device - Google Patents
Signal surge protection device Download PDFInfo
- Publication number
- CN201821095U CN201821095U CN201020578534XU CN201020578534U CN201821095U CN 201821095 U CN201821095 U CN 201821095U CN 201020578534X U CN201020578534X U CN 201020578534XU CN 201020578534 U CN201020578534 U CN 201020578534U CN 201821095 U CN201821095 U CN 201821095U
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- voltage
- protected location
- protection
- surge protector
- stage
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Abstract
The utility model discloses a signal surge protection device with a floating protection function. The protection device comprises a first-stage protection unit used for conducting shunt protection on the transmission signals, and a second-stage protection unit used for conducting voltage-limiting protection on the transmission signals, wherein a protective resistor is arranged between the first-stage protection unit and the second-stage protection unit; the first-stage and second-stage protection units are connected with a ground wire; the first-stage protection unit consists of gas discharge tubes which are connected with the ground wire; the second-stage protection unit consists of a bridge rectifier and a voltage-limiting protection circuit connected with the output end of the bridge rectifier; the input end of the bridge rectifier is connected with a transmission signal wire; and the voltage-limiting protection circuit can be formed by parallelly connecting two serially-connected transient voltage suppressor diodes with another transient voltage suppressor diode, or formed by parallelly connecting two serially-connected diodes with one transient voltage suppressor diode, or formed by parallelly connecting two serially-connected piezoresistors and another piezoresistor.
Description
Technical field
The utility model relates to a kind of signal surge protector, specifically, relates to a kind of with the signal surge protection device of protecting floatingly.
Background technology
At present; surge protector generally adopts the mode of one-level surge protecting circuit or secondary surge protecting circuit; because the one-level surge protecting circuit absorbs not enough to switching surge voltage on the line; surge voltage is behind the one-level surge protecting circuit; still have very high residual voltage, also have the possibility of breaking equipment.In the mode of secondary surge protecting circuit; though second level surge protecting circuit can absorb the residual voltage of the first order; with the surge voltage good restraining in a reasonable range; but owing to do not suppress circuit between circuit and the ground; as the surge voltage switching in the line the time; although the surge voltage between two lines can be absorbed, the surge voltage between two lines and the ground still can be very high, also can damage effect to equipment.
The utility model content
At the deficiency of above-mentioned prior art, the utility model provides a kind of voltage that not only can reduce between the transmission signal line, also can reduce the signal surge protector that the band of voltage between transmission signal line and the ground is protected floatingly.It comprises first order protected location and second level protected location, and described first order protected location is connected with ground wire respectively with second level protected location.
Be connected with protective resistance between described first order protected location and the second level protected location.
Described first order protected location comprises the gas discharge tube that connects transmission signal line, and described gas discharge tube is connected with described ground wire.
Described second level protected location is made up of with the voltage-limiting protection circuit that is connected with this bridge heap output the bridge heap, and described bridge heap input is connected with transmission signal line, and described voltage-limiting protection circuit is connected with ground wire.
Described voltage-limiting protection circuit is connected in parallel by two Transient Suppression Diodes of connecting and another Transient Suppression Diode and forms.
Described voltage-limiting protection circuit is connected in parallel by two diodes of connecting and a Transient Suppression Diode and forms.
Described voltage-limiting protection circuit is connected in parallel by two piezo-resistances that are connected in series and another piezo-resistance and forms.
The signal surge protector that the band that the utility model provides is protected floatingly compared with prior art has following advantage: the utility model is connected with ground wire with second level protected location by first order protected location; not only the residual voltage with first order protected location absorbs; reduce the voltage between the transmission signal line; and reduced voltage between transmission signal line and the ground, further protected the safety of equipment and circuit.
Description of drawings
Fig. 1 is the schematic diagram of signal surge protector of the present utility model;
Fig. 2 is the signal surge protector first execution mode circuit theory diagrams of the present utility model;
Fig. 3 is the signal surge protector second execution mode circuit theory diagrams of the present utility model;
Fig. 4 is signal surge protector the 3rd execution mode circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further set forth.
As shown in Figure 1; the signal surge protector that the utility model band is protected floatingly comprises transmission signals is carried out the first order protected location of divided current and transmission signals carried out the second level protected location of voltage-limiting protection; described first order protected location and second level protected location are connected with protective resistance, and described first order protected location all is connected with ground wire with second level protected location.By in the transmission loop, inserting surge protector of the present utility model, can eliminate the thunder and lightning energy in the transmission loop, the equipment in the protective circuit.Described first order protected location is made up of gas discharge tube GAS1; described gas discharge tube GAS1 is connected with described ground wire, and gas discharge tube GAS1 not only can absorb voltage in the circuit, and has very strong through-current capability; electric current in the transmission signals is shunted, played a protective role.Described second level protected location is made up of with the voltage-limiting protection circuit that is connected with this bridge heap DB1 output bridge heap DB1, and described bridge heap input is connected with transmission signal line.
As shown in Figure 2; signal surge protector first execution mode of the present utility model is: described protective resistance comprises R1 and R2; described voltage-limiting protection circuit is connected in parallel by two Transient Suppression Diodes (A2 and A3) of connecting and another Transient Suppression Diode A1 and forms, and described two Transient Suppression Diodes (A2 and A3) are connected with described ground wire simultaneously.Through the effect of second level protected location, further reduced the voltage between the transmission signal line.Therefore, transmission signals has not only reduced the voltage between the transmission signal line, and has reduced voltage between transmission signal line and the ground by behind the second class protection of the present utility model unit, has further protected the safety of equipment and circuit.
In order to make the better effects if of lightning protection and protection, can carry out second and third kind improvement to first kind of optimal way circuit of the present utility model, as shown in Figure 3, in implementation process, the voltage-limiting protection circuit is connected in parallel by two diodes (D1 and D2) of connecting and a Transient Suppression Diode A1 and forms, and described two diodes (D1 and D2) are connected with described ground wire simultaneously; As shown in Figure 4, described protective circuit can also be connected in parallel by two piezo-resistances that are connected in series (M2 and M3) and another piezo-resistance M1 and form, and described two piezo-resistances (M2 and M3) are connected with described ground wire simultaneously.Other circuit remains unchanged on the basis that changes foregoing circuit.Can reach first kind of technique effect that execution mode is same by second and third kind execution mode, can reduce voltage between voltage between the transmission signal line and transmission signal line and the ground simultaneously, further protect the safety of equipment and circuit.
The foregoing description is only for the usefulness that the utility model is described; and be not to be to restriction of the present utility model; the those of ordinary skill in relevant technologies field; under the situation that does not break away from spirit and scope of the present utility model; can also make various variations and modification; therefore all technical schemes that are equal to also should belong to category of the present utility model, and scope of patent protection of the present utility model should be limited by each claim.
Claims (7)
1. signal surge protector, it comprises first order protected location and second level protected location, it is characterized in that, described first order protected location is connected with ground wire respectively with second level protected location.
2. signal surge protector according to claim 1 is characterized in that, is connected with protective resistance between described first order protected location and the second level protected location.
3. signal surge protector according to claim 1 and 2 is characterized in that, described first order protected location comprises the gas discharge tube that connects transmission signal line, and described gas discharge tube is connected with described ground wire.
4. signal surge protector according to claim 3; it is characterized in that; described second level protective circuit is made up of with the voltage-limiting protection circuit that is connected with this bridge heap output the bridge heap, and described bridge heap input is connected with transmission signal line, and described voltage-limiting protection circuit is connected with ground wire.
5. signal surge protector according to claim 4 is characterized in that, described voltage-limiting protection circuit is connected in parallel by two Transient Suppression Diodes of connecting and another Transient Suppression Diode and forms.
6. signal surge protector according to claim 4 is characterized in that, described voltage-limiting protection circuit is connected in parallel by two diodes of connecting and a Transient Suppression Diode and forms.
7. signal surge protector according to claim 4 is characterized in that, described voltage-limiting protection circuit is connected in parallel by two piezo-resistances that are connected in series and another piezo-resistance and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020578534XU CN201821095U (en) | 2010-10-26 | 2010-10-26 | Signal surge protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020578534XU CN201821095U (en) | 2010-10-26 | 2010-10-26 | Signal surge protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201821095U true CN201821095U (en) | 2011-05-04 |
Family
ID=43919037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020578534XU Expired - Lifetime CN201821095U (en) | 2010-10-26 | 2010-10-26 | Signal surge protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201821095U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713656A (en) * | 2018-12-29 | 2019-05-03 | 佛山市浦斯电子有限公司 | Surge protector signal protection circuit, method and surge protector |
-
2010
- 2010-10-26 CN CN201020578534XU patent/CN201821095U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713656A (en) * | 2018-12-29 | 2019-05-03 | 佛山市浦斯电子有限公司 | Surge protector signal protection circuit, method and surge protector |
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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 |
Granted publication date: 20110504 |
|
| CX01 | Expiry of patent term |