CN201854022U - Signal control surge protection circuit - Google Patents
Signal control surge protection circuit Download PDFInfo
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- CN201854022U CN201854022U CN2010206228362U CN201020622836U CN201854022U CN 201854022 U CN201854022 U CN 201854022U CN 2010206228362 U CN2010206228362 U CN 2010206228362U CN 201020622836 U CN201020622836 U CN 201020622836U CN 201854022 U CN201854022 U CN 201854022U
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- protection
- discharge tube
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- surge protection
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Abstract
The utility model discloses a signal control surge protection circuit, which is disposed between two signal wires and comprises a ceramic gas discharge tube for primary protection, a transient voltage suppresser for secondary protection and a current limiting resistor connected between the primary protection and the secondary protection. The signal control surge protection circuit is characterized in that a full bridge circuit is arranged in a circuit of the secondary protection and consists of four rectifying diodes in serial-parallel connection, and the transient voltage suppresser is connected between bridge rectifiers of the full bridge circuit. Preferably, the transient voltage suppresser is a semiconductor discharge tube, and two diodes are added to earth at two ends of the semiconductor discharge tube. The ceramic gas discharge tube is a discharge triode, a common end of the ceramic gas discharge tube is grounded, and two other ends are directly connected with the signal wires. The signal control surge protection circuit is ingenious in structural design, realizes more effective energy matching of the primary protection and the secondary protection, greatly reduces parasitic capacitance, correspondingly reduces insertion loss, and is more accurate in signal control.
Description
Technical field
The utility model relates to the signal controlling Surge Protector, relates in particular to a kind of signal controlling surge protection circuit.
Background technology
Along with continuous progress in science and technology,, create long-term stability and get harmonious society for ensureing the safety of people's quality of life and lives and properties.The communications monitor system of railway traffic; finance service; the place of public amusement; the safety monitoring of enterprises and institutions; the automatic building control system of biotope etc.; video monitoring equipment mostly has been installed; the overwhelming majority is loaded on outdoor; the influence that is subject to be struck by lightning; safe operation for protection equipment; the signal controlling Surge Protector generally all is installed; and signal controlling surge protection circuit plate is a core component; when the voltage of thunderbolt generation is excessive, very easily destroy signal section; because existing signal controlling surge protection circuit plate is also relatively more fragile to the resistance to compression function of thunderbolt; protective circuit easily produces parasitic capacitance, also has the flux matched bad disadvantage of energy of first class of protection and second class protection.And surge protector is to be connected on the signalling channel, if the first order of protective circuit and second level coupling are bad, often the power loss to the signal transmission is bigger, and signal controlling is produced bad effect, therefore remains further to be improved its circuit structure and performance.
The utility model content
In order to overcome the defective that above-mentioned prior art exists; the utility model provides a kind of signal controlling surge protection circuit, adopts the two-stage protection, has the function of resisting the big electric current of lightning surge; circuit one-level and second degree matches are good, and the effect of protection electronic monitoring equipment is better.
To achieve these goals, the technical solution of the utility model is as follows:
The signal controlling surge protection circuit is arranged between two holding wires, and it comprises the ceramic gas discharge tube of first class of protection, the full-bridge circuit of second class protection and Transient Suppression Diode, and be connected current-limiting resistance between first class of protection and the second class protection.
Described full-bridge circuit is made up of four rectifier diode connection in series-parallel, and described Transient Suppression Diode is connected in the middle of the bridge heap of described full-bridge circuit, can reduce parasitic capacitance greatly like this, has correspondingly reduced the insertion loss, and the influence of signal transmission is reduced.
Further, described current-limiting resistance has two, is connected on above-mentioned two holding wires and with full-bridge circuit to connect.
Preferably, described Transient Suppression Diode is selected semiconductor discharge tube for use, and it can make the energy between first class of protection and second class protection be complementary, and has reduced the power loss of signal in transmission course;
The two ends of described semiconductor discharge tube are provided with two diodes over the ground, and an end of described two diodes connects semiconductor discharge tube respectively, and other end ground connection utilizes the unidirectional conducting effect of diode can prevent that the signal that the earth brings from disturbing.
Further, described ceramic gas discharge tube is three utmost point discharge tubes, its common end grounding, and two ends directly link to each other with described two holding wires in addition, can constitute forward and reverse two loops with the earth, play release thunder and lightning transient state overcurrent and over-voltage effect; When applied voltage increases to dielectric strength above gas, the gap of two interpolars is with discharge breakdown, be converted into conduction state by original state of insulation, the timely earial drainage of excessive lightning current is gone out, the voltage of conduction back discharge tube two interpolars maintains the residual voltage level that the arc road is determined, reduces the influence of thunder and lightning overvoltage to circuit.
The beneficial effects of the utility model are, have increased full-bridge circuit in the circuit of second class protection, greatly reduce parasitic capacitance, have correspondingly reduced the insertion loss; Transient Suppression Diode selects for use semiconductor discharge tube to make first class of protection and second class protection flux matchedly better effectively reduce the power loss of signal in the transmission of two inter-stages, and it is more accurate to help control;
Transient state diode in the second class protection has increased diode over the ground makes the anti-signal interference performance of protective circuit stronger.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment:
Be easy to understand understanding in order to make creation characteristic of the present utility model, technological means and to reach purpose, further set forth the utility model below in conjunction with specific embodiment.
Embodiment:
Referring to Fig. 1; the signal controlling surge protection circuit; be arranged between holding wire A and the holding wire B; it comprises the ceramic gas discharge tube G1 of first class of protection; the full-bridge circuit of second class protection and Transient Suppression Diode TVS1, and be connected on the holding wire A current-limiting resistance R1 be connected holding wire B on current-limiting resistance R2.
Ceramic gas discharge tube G1 is three utmost point discharge tubes, its common end grounding, two ends link to each other with holding wire A, holding wire B respectively in addition, can constitute forward and reverse two loops with the earth: holding wire A-ceramic gas discharge tube G1-earth terminal GND and holding wire B-ceramic gas discharge tube G1-earth terminal GND, play release thunder and lightning transient state overcurrent and over-voltage effect, forward still is that reverse transient state heavy current attack equipment all can be protected; When applied voltage increased to dielectric strength above gas, the gap of two interpolars was converted into conduction state with discharge breakdown by original state of insulation, and excessive lightning current is in time released away.
Described full-bridge circuit is by rectifier diode D1, D2, D3, the D4 connection in series-parallel is formed, in the middle of the bridge heap of full-bridge circuit, semiconductor discharge tube TVS1 is set, the end of semiconductor discharge tube TVS1 connects the positive input of rectifier diode D1 and the positive input of rectifier diode D2 simultaneously, the other end connects the negative sense output of rectifier diode D3 and the negative sense output of rectifier diode D4 simultaneously, the negative sense output of rectifier diode D1 and the positive input of rectifier diode D3 are connected on the holding wire A, and the negative sense output of rectifier diode D2 and the positive input of rectifier diode D4 are connected on the holding wire B.
Draw by test, Transient Suppression Diode selects for use semiconductor discharge tube TVS1 that the energy between first class of protection and second class protection is complementary, and has reduced the power loss of signal in transmission course.
This combined protection of above-mentioned semiconductor discharge tube TVS1 and full-bridge circuit can reduce the parasitic capacitance in the circuit greatly, has correspondingly reduced the insertion loss, and the influence of signal transmission is reduced, and makes signal controlling more accurate.
Semiconductor discharge tube TVS1 two ends also are provided with two diode D5, D6 over the ground, and the positive input of diode D5 connects the end of semiconductor discharge tube TVS1, and the negative sense output of diode D5 links to each other with earth terminal GND; The negative sense output of diode D6 connects the other end of semiconductor discharge tube TVS1, and the positive input of diode D6 links to each other with earth terminal GND.Help like this preventing that the signal that the earth brings from disturbing.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. signal controlling surge protection circuit; be arranged between two holding wires; it comprises the ceramic gas discharge tube of first class of protection and the Transient Suppression Diode of second class protection; and be connected current-limiting resistance between first class of protection and the second class protection; it is characterized in that; be provided with the full-bridge circuit of being made up of four rectifier diode connection in series-parallel in the circuit of described second class protection, described Transient Suppression Diode is connected in the middle of the bridge heap of described full-bridge circuit.
2. signal controlling surge protection circuit according to claim 1 is characterized in that described Transient Suppression Diode is selected semiconductor discharge tube for use.
3. signal controlling surge protection circuit according to claim 2 is characterized in that, the two ends of described semiconductor discharge tube are provided with two diodes over the ground, and an end of described two diodes connects semiconductor discharge tube respectively, other end ground connection.
4. signal controlling surge protection circuit according to claim 1 and 2 is characterized in that, described ceramic gas discharge tube is three utmost point discharge tubes, its common end grounding, and two ends directly link to each other with described two holding wires in addition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206228362U CN201854022U (en) | 2010-11-23 | 2010-11-23 | Signal control surge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206228362U CN201854022U (en) | 2010-11-23 | 2010-11-23 | Signal control surge protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201854022U true CN201854022U (en) | 2011-06-01 |
Family
ID=44096402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206228362U Expired - Fee Related CN201854022U (en) | 2010-11-23 | 2010-11-23 | Signal control surge protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201854022U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113054A (en) * | 2014-08-06 | 2014-10-22 | 国家电网公司 | Combined type anti-thunder equipment capable of preventing concentrated copy electric energy meter from being damaged by thunder and lightning |
| CN110401181A (en) * | 2019-07-02 | 2019-11-01 | 浙江大华技术股份有限公司 | A kind of surging protection circuit |
| US11764569B2 (en) | 2019-07-02 | 2023-09-19 | Zhejiang Dahua Technology Co., Ltd. | Electrical surge protection circuits |
-
2010
- 2010-11-23 CN CN2010206228362U patent/CN201854022U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113054A (en) * | 2014-08-06 | 2014-10-22 | 国家电网公司 | Combined type anti-thunder equipment capable of preventing concentrated copy electric energy meter from being damaged by thunder and lightning |
| CN110401181A (en) * | 2019-07-02 | 2019-11-01 | 浙江大华技术股份有限公司 | A kind of surging protection circuit |
| CN110401181B (en) * | 2019-07-02 | 2022-03-01 | 浙江大华技术股份有限公司 | Surge protection circuit |
| US11764569B2 (en) | 2019-07-02 | 2023-09-19 | Zhejiang Dahua Technology Co., Ltd. | Electrical surge protection circuits |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20131123 |