CN209462013U - A kind of 6KV surge protection circuit - Google Patents
A kind of 6KV surge protection circuit Download PDFInfo
- Publication number
- CN209462013U CN209462013U CN201822091442.8U CN201822091442U CN209462013U CN 209462013 U CN209462013 U CN 209462013U CN 201822091442 U CN201822091442 U CN 201822091442U CN 209462013 U CN209462013 U CN 209462013U
- Authority
- CN
- China
- Prior art keywords
- varistor
- electrically connected
- surge
- inductance
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of 6KV surge protection circuits, the protection circuit includes gas-discharge tube, first, second varistor, thermistor and inductance, input firewire end respectively with gas-discharge tube, one end of inductance is electrically connected, one end of the other end of gas-discharge tube and the first varistor is electrically connected, the other end of first varistor respectively with input zero curve end, one end of thermistor is electrically connected, the other end of inductance one end with the second varistor respectively, output line of fire end is electrically connected, the other end of second varistor respectively with the other end of thermistor, zero curve end is exported to be electrically connected.The surge voltage of 6KV can be effectively down within 680V by the anti-surge circuit in the utility model, and the surge avoided in circuit damages electronic product or personal safety, has ensured the reliability and safety of late-class circuit.
Description
Technical field
The utility model relates to electricity field more particularly to a kind of 6KV surge protection circuits.
Background technique
Surge is the spike that a kind of rate of climb is fast, the duration is short, and Producing reason is various, such as electricity
Net over-voltage, high tension spark electric discharge, lightning stroke etc..Electronic product encounters surge during use will lead to the damage of electronic product
It is bad, therefore, in order to improve the reliability and personal safety of electronic product, it is necessary to take safeguard procedures to surge.
Summary of the invention
The utility model aim is to solve the above problems, and provides the 6KV surge that a kind of structure is simple, Surge handling capability is strong and protects
Protection circuit.
To achieve the goals above, the technical solution of the utility model is:
A kind of 6KV surge protection circuit, the protection circuit include gas-discharge tube, the first, second varistor, temperature-sensitive
Resistance and inductance, input firewire end are electrically connected with one end of gas-discharge tube, inductance respectively, the other end of gas-discharge tube
Be electrically connected with one end of the first varistor, the other end of the first varistor respectively with input zero curve end, thermistor
One end be electrically connected, the other end of inductance respectively with one end of the second varistor, output line of fire end be electrically connected, second
The other end of varistor is electrically connected with the other end of thermistor, output zero curve end respectively.
Further, the protection circuit further includes fuse, and the one end for inputting firewire end and fuse is electrically connected,
The other end of fuse is electrically connected with one end of gas-discharge tube, inductance respectively.
Compared with prior art, the utility model has the advantages and positive effects of:
Surge protection circuit point two-stage in the utility model carries out absorption surge voltage, the first order by gas-discharge tube with
First varistor is composed in series, and gas-discharge tube plays buffer action when no surge voltage is come in, and at this time first
The leakage current characteristics of varistor can there are the half voltages of input voltage at gas-discharge tube both ends, in surge level
Once exceed the trigger voltage of gas-discharge tube when arrival, the first varistor both end voltage is directly connected simultaneously in gas-discharge tube
Low-resistance is become from high resistant rapidly when exceeding its pressure sensitive voltage value, moment surge voltage is pressure-sensitive with first in gas-discharge tube at this time
It forces to drag down under the action of resistance, reduces surge peak voltage for the first order；The second level is by inductance, thermistor, the second pressure
Quick resistance composition, surge are flowing through inductance and thermistor after the first order, are again passing through the second varistor, the inductance of inductance
Characteristic can show high induction reactance effect by low get higher when immediate current passes through, and reduce spike electricity for the second varistor
Stream, thermistor also play certain buffer function in circuit, under the action of inductance and thermistor, peak voltage and electricity
Stream be lower by height, higher than the second varistor pressure sensitive voltage when the second varistor low-resistance is become from high resistant rapidly, it is suppressed that
The rising of surge voltage, surge voltage is limited in 680V；Therefore, the anti-surge circuit in the utility model can effectively by
The surge voltage of 6KV is down within 680V, and the surge avoided in circuit damages electronic product or personal safety, is ensured
The reliability and safety of late-class circuit.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, any modification, equivalent replacement, improvement and so on should be included in the utility model
Within protection scope.
As shown in Figure 1, a kind of 6KV surge protection circuit, the protection circuit include fuse F1, gas-discharge tube TD1,
One end electricity of first, second varistor RV1, RV2, thermistor RT1 and inductance L, input firewire end ACL and fuse F1
Property connection, the other end of fuse F1 respectively with one end of gas-discharge tube TD1, inductance L be electrically connected, gas-discharge tube TD1
The other end and the first varistor RV1 one end be electrically connected, the other end of the first varistor RV1 respectively with input zero curve
End A CN, thermistor RT1 one end be electrically connected, the other end of inductance L respectively with one end of the second varistor RV2, defeated
Out firewire end ACL be electrically connected, the other end of the second varistor RV2 respectively with the other end of thermistor RT1, output zero
Line end ACN is electrically connected.
Surge protection circuit point two-stage in the utility model carries out absorption surge voltage, the first order by gas-discharge tube with
First varistor is composed in series, and gas-discharge tube plays buffer action when no surge voltage is come in, and at this time first
The leakage current characteristics of varistor can there are the half voltages of input voltage at gas-discharge tube both ends, in surge level
Once exceed the trigger voltage of gas-discharge tube when arrival, the first varistor both end voltage is directly connected simultaneously in gas-discharge tube
Low-resistance is become from high resistant rapidly when exceeding its pressure sensitive voltage value, moment surge voltage is pressure-sensitive with first in gas-discharge tube at this time
It forces to drag down under the action of resistance, reduces surge peak voltage for the first order；The second level is by inductance, thermistor, the second pressure
Quick resistance composition, surge are flowing through inductance and thermistor after the first order, are again passing through the second varistor, the inductance of inductance
Characteristic can show high induction reactance effect by low get higher when immediate current passes through, and reduce spike electricity for the second varistor
Stream, thermistor also play certain buffer function in circuit, under the action of inductance and thermistor, peak voltage and electricity
Stream be lower by height, higher than the second varistor pressure sensitive voltage when the second varistor low-resistance is become from high resistant rapidly, it is suppressed that
The rising of surge voltage, surge voltage is limited in 680V；Therefore, the anti-surge circuit in the utility model can effectively by
The surge voltage of 6KV is down within 680V, and the surge avoided in circuit damages electronic product or personal safety, is ensured
The reliability and safety of late-class circuit.
Claims (2)
1. a kind of 6KV surge protection circuit, it is characterised in that: the protection circuit includes gas-discharge tube, first, second pressure-sensitive
Resistance, thermistor and inductance, input firewire end are electrically connected with one end of gas-discharge tube, inductance respectively, gas discharge
One end of the other end of pipe and the first varistor be electrically connected, the other end of the first varistor respectively with input zero line side
One end electric connection of head, thermistor, the other end of inductance are electric with one end of the second varistor, output line of fire end respectively
Property connection, the other end of the second varistor respectively with the other end of thermistor, output zero curve end be electrically connected.
2. 6KV surge protection circuit as described in claim 1, it is characterised in that: the protection circuit further includes fuse, defeated
The one end for entering firewire end and fuse is electrically connected, and the other end of fuse is electric with one end of gas-discharge tube, inductance respectively
Property connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822091442.8U CN209462013U (en) | 2018-12-12 | 2018-12-12 | A kind of 6KV surge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822091442.8U CN209462013U (en) | 2018-12-12 | 2018-12-12 | A kind of 6KV surge protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209462013U true CN209462013U (en) | 2019-10-01 |
Family
ID=68040665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822091442.8U Expired - Fee Related CN209462013U (en) | 2018-12-12 | 2018-12-12 | A kind of 6KV surge protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209462013U (en) |
-
2018
- 2018-12-12 CN CN201822091442.8U patent/CN209462013U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191001 Termination date: 20201212 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |