CN209282831U - A kind of 10KV surge protection circuit - Google Patents
A kind of 10KV surge protection circuit Download PDFInfo
- Publication number
- CN209282831U CN209282831U CN201822095826.7U CN201822095826U CN209282831U CN 209282831 U CN209282831 U CN 209282831U CN 201822095826 U CN201822095826 U CN 201822095826U CN 209282831 U CN209282831 U CN 209282831U
- Authority
- CN
- China
- Prior art keywords
- varistor
- inductance
- electrically connected
- discharge tube
- 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
Links
Abstract
The utility model discloses a kind of 10KV surge protection circuits; protecting circuit includes gas-discharge tube, the first to the 5th varistor, thermistor, the first inductance, the second inductance; it inputs firewire end to be electrically connected with one end of one end of the first varistor, thermistor respectively, the other end of thermistor is electrically connected with one end of one end of the second varistor, one end of third varistor and the first inductance respectively；Input zero curve end respectively with one end of the other end of the first varistor, the other end of the first varistor, one end of the 4th varistor, the second inductance be electrically connected, the other end of third varistor, the 4th varistor the other end connect with one end of gas-discharge tube；The other end and ground wire of gas-discharge tube are electrically connected；The other end of first inductance is electrically connected with one end of output line of fire end, the 5th varistor respectively, and the other end of the second inductance is electrically connected with the other end of the 5th varistor, output zero curve end respectively.
Description
Technical field
The utility model relates to electricity field more particularly to a kind of 10KV 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 10KV surge that a kind of structure is simple, Surge handling capability is strong
Protect circuit.
To achieve the goals above, the technical solution of the utility model is:
A kind of 10KV surge protection circuit, the protection circuit include gas-discharge tube, the first to the 5th varistor, heat
Quick resistance, the first inductance, the second inductance, the input firewire end respectively with one end of the first varistor, thermistor
One end be electrically connected, the other end of thermistor respectively with one end of the second varistor, third varistor one end and
One end of first inductance is electrically connected；Input zero curve end respectively with the other end of the first varistor, second varistor
One end electric connection of the other end, one end of the 4th varistor, the second inductance, the other end of third varistor, the 4th pressure
The other end of quick resistance is connect with one end of gas-discharge tube；The other end and ground wire of gas-discharge tube are electrically connected；First
The other end of inductance is electrically connected with one end of output line of fire end, the 5th varistor respectively, the other end point of the second inductance
It is not electrically connected with the other end of the 5th varistor, output zero curve end.
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 one end of the first varistor, thermistor respectively.
Compared with prior art, the utility model has the advantages and positive effects of:
The circuit of the utility model includes differential-mode portion and common mode part；Differential-mode portion point three-level carries out absorbing surge electricity
Pressure, the first order are made of the first varistor；The second level is made of thermistor, the second varistor；The third level is by the first electricity
Sense, the second inductance, the 5th varistor composition.Common mode part is by third varistor, the 4th varistor, gas-discharge tube group
At；Surge voltage arrive when beyond the first varistor pressure sensitive voltage when, the first varistor becomes low-resistance from high-impedance state
State limits a part of surge voltage, this is the first order in differential-mode portion；After the first order absorbs a part of surge voltage
Voltage is carried out by thermistor and current buffering passes through the second varistor again and absorbs, likewise, when the second varistor two
The second varistor becomes low resistance state from high-impedance state when end voltage is higher than its pressure sensitive voltage value, limits a part of surge voltage,
This is the second level；The first inductance, the second inductance are flowed through after the first order and the second level absorb and reduce surge voltage, due to inductance spy
Property acted in immediate current by high induction reactance can be showed when low get higher, reduce peak current and electricity for the 5th varistor
Pressure, when being higher than the pressure sensitive voltage of the 5th varistor, the 5th varistor becomes low-resistance from high resistant rapidly, it is suppressed that surge electricity
The rising of pressure, surge voltage is limited in 100V, this is the third level；Common mode part is by third varistor, the 4th pressure-sensitive electricity
Resistance, gas-discharge tube composition, gas-discharge tube are connected with third varistor, the 4th varistor, and ground wire is through gas-discharge tube
It is connected in series between input firewire end and input zero curve end with third varistor, the 4th varistor, in no surge
Gas-discharge tube plays buffer action when voltage is come in, at this time the leakage current of third varistor, the 4th varistor
Characteristic can there are the half voltages of input voltage at gas-discharge tube both ends, once exceed gas when surge level arrives
Third varistor, the 4th varistor both end voltage is directly connected in the trigger voltage of discharge tube, gas-discharge tube, while super
Low-resistance is become from high resistant rapidly when its pressure sensitive voltage value out, moment surge voltage is at this time in gas-discharge tube and the pressure-sensitive electricity of third
It forces to drag down under the action of resistance, the 4th varistor, to inhibit the promotion of surge voltage；By differential-mode portion to surge electricity
The absorption of pressure and common mode part mutually promote to the inhibiting effect of surge voltage, two parts, greatly reduce surge
Influence to circuit, has ensured the stability of circuit, to be effectively protected the reliability 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 10KV surge protection circuit, the protection circuit includes fuse F1, gas-discharge tube
TD1, first to the 5th varistor RV1, RV2, RV3, RV4, RV5, thermistor RT1, the first inductance L1, the second inductance L2,
It is described input firewire end ACL and fuse F1 one end be electrically connected, the other end of fuse F1 respectively with the first pressure-sensitive electricity
Hinder one end of RV1, one end of thermistor RT1 is electrically connected, the other end of thermistor RT1 respectively with the second varistor
One end of one end of RV2, one end of third varistor RV3 and the first inductance L1 is electrically connected；Input zero curve end ACN points
Not with the other end of the first varistor RV1, the other end of the second varistor RV2, one end of the 4th varistor RV4,
One end of two inductance L2 is electrically connected, the other end of third varistor RV3, the 4th varistor RV4 the other end and gas
One end of body discharge tube TD1 connects；The other end and ground wire of gas-discharge tube TD1 is electrically connected；The other end of first electricity L1 point
It is not electrically connected with one end of output line of fire end A CL, the 5th varistor RV5, the other end of the second inductance L2 is respectively with the
The other end, the output zero curve end ACN of five varistor RV5 is electrically connected.
The circuit of the utility model includes differential-mode portion and common mode part；Differential-mode portion point three-level carries out absorbing surge electricity
Pressure, the first order are made of the first varistor；The second level is made of thermistor, the second varistor；The third level is by the first electricity
Sense, the second inductance, the 5th varistor composition.Common mode part is by third varistor, the 4th varistor, gas-discharge tube group
At；Surge voltage arrive when beyond the first varistor pressure sensitive voltage when, the first varistor becomes low-resistance from high-impedance state
State limits a part of surge voltage, this is the first order in differential-mode portion；After the first order absorbs a part of surge voltage
Voltage is carried out by thermistor and current buffering passes through the second varistor again and absorbs, likewise, when the second varistor two
The second varistor becomes low resistance state from high-impedance state when end voltage is higher than its pressure sensitive voltage value, limits a part of surge voltage,
This is the second level；The first inductance, the second inductance are flowed through after the first order and the second level absorb and reduce surge voltage, due to inductance spy
Property acted in immediate current by high induction reactance can be showed when low get higher, reduce peak current and electricity for the 5th varistor
Pressure, when being higher than the pressure sensitive voltage of the 5th varistor, the 5th varistor becomes low-resistance from high resistant rapidly, it is suppressed that surge electricity
The rising of pressure, surge voltage is limited in 100V, this is the third level；Common mode part is by third varistor, the 4th pressure-sensitive electricity
Resistance, gas-discharge tube composition, gas-discharge tube are connected with third varistor, the 4th varistor, and ground wire is through gas-discharge tube
It is connected in series between input firewire end and input zero curve end with third varistor, the 4th varistor, in no surge
Gas-discharge tube plays buffer action when voltage is come in, at this time the leakage current of third varistor, the 4th varistor
Characteristic can there are the half voltages of input voltage at gas-discharge tube both ends, once exceed gas when surge level arrives
Third varistor, the 4th varistor both end voltage is directly connected in the trigger voltage of discharge tube, gas-discharge tube, while super
Low-resistance is become from high resistant rapidly when its pressure sensitive voltage value out, moment surge voltage is at this time in gas-discharge tube and the pressure-sensitive electricity of third
It forces to drag down under the action of resistance, the 4th varistor, to inhibit the promotion of surge voltage；By differential-mode portion to surge electricity
The absorption of pressure and common mode part mutually promote to the inhibiting effect of surge voltage, two parts, greatly reduce surge
Influence to circuit, has ensured the stability of circuit, to be effectively protected the reliability of late-class circuit.
Claims (2)
1. a kind of 10KV surge protection circuit, it is characterised in that: the protection circuit includes gas-discharge tube, the first to the 5th pressure
Quick resistance, thermistor, the first inductance, the second inductance, the input firewire end respectively with one end of the first varistor, heat
One end of quick resistance is electrically connected, the other end of thermistor respectively with one end of the second varistor, third varistor
One end and one end of the first inductance are electrically connected；Zero curve end is inputted to press with the other end of the first varistor, second respectively
The other end of quick resistance, one end of the 4th varistor, the second inductance one end be electrically connected, third varistor it is another
It holds, the other end of the 4th varistor is connect with one end of gas-discharge tube；The other end and ground wire of gas-discharge tube are electrical
Connection；The other end of first inductance is electrically connected with one end of output line of fire end, the 5th varistor respectively, the second inductance
The other end is electrically connected with the other end of the 5th varistor, output zero curve end respectively.
2. 10KV surge protection circuit as described in claim 1, it is characterised in that: the protection circuit further includes fuse,
The one end for inputting firewire end and fuse is electrically connected, the other end of fuse respectively with one end of the first varistor, heat
One end of quick resistance is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822095826.7U CN209282831U (en) | 2018-12-12 | 2018-12-12 | A kind of 10KV surge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822095826.7U CN209282831U (en) | 2018-12-12 | 2018-12-12 | A kind of 10KV surge protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209282831U true CN209282831U (en) | 2019-08-20 |
Family
ID=67611300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822095826.7U Expired - Fee Related CN209282831U (en) | 2018-12-12 | 2018-12-12 | A kind of 10KV surge protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209282831U (en) |
-
2018
- 2018-12-12 CN CN201822095826.7U patent/CN209282831U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106159926B (en) | A kind of surge protection circuit and Surge Protector | |
| CN103795045B (en) | Protection device | |
| CN104767194B (en) | A kind of high voltage power transmission current conversion station over-pressure safety device | |
| CN101752858B (en) | Multi-gap metal gas discharge tube power supply over-voltage protection module | |
| CN103311914A (en) | Overvoltage production circuit of composite type piezoresistor | |
| CN102709902A (en) | Surge current protection device | |
| CN108493913A (en) | A kind of AC power surge protective device and electronic equipment | |
| CN209282831U (en) | A kind of 10KV surge protection circuit | |
| JP5192002B2 (en) | Surge energy conversion circuit | |
| CN205829161U (en) | A kind of surge protection circuit and Surge Protector | |
| CN107565508B (en) | TVS protective device with failure breaking function | |
| CN209462013U (en) | A kind of 6KV surge protection circuit | |
| CN202586325U (en) | Lightning-protection surge-proof power source protection device | |
| CN206379875U (en) | Surge protection circuit for locomotive dc source electrical equipment | |
| CN204012686U (en) | A kind of serial interface circuit with lightning protection function | |
| WO2017181806A1 (en) | Switching-mode power supply lightning protection apparatus and switching-mode power supply | |
| CN204992567U (en) | Lightning protection circuit | |
| CN210898531U (en) | Low-residual-voltage LED drive 4000V surge segmented absorption protection circuit | |
| CN204191002U (en) | Can the LED drive circuit of anti-2KV surge voltage | |
| CN209267432U (en) | A kind of LCL filtering gird-connected inverter protection circuit | |
| CN107887898A (en) | A kind of surging protection circuit and power electronic equipment of Single-phase PFC circuit | |
| CN202978261U (en) | Double-channel surge protector | |
| CN207339256U (en) | A kind of outdoor signal controller lightning protection structure | |
| CN207010228U (en) | A kind of signal surge device protector and its circuit | |
| CN107104603A (en) | Device current equalizing structure and method under the protection of three level IGCT current transformers standard-sized sheets |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190820 Termination date: 20201212 |