CN206759048U - The anti-lightning strike protection circuit of outdoor terminals class communication equipment power port - Google Patents
The anti-lightning strike protection circuit of outdoor terminals class communication equipment power port Download PDFInfo
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- CN206759048U CN206759048U CN201720411148.3U CN201720411148U CN206759048U CN 206759048 U CN206759048 U CN 206759048U CN 201720411148 U CN201720411148 U CN 201720411148U CN 206759048 U CN206759048 U CN 206759048U
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Abstract
A kind of anti-lightning strike protection circuit of outdoor terminals class communication equipment power port is the utility model is related to, two-stage protection circuit is used between Live line Zero line (both positive and negative polarity), delay circuit is provided between two-stage protection circuit.Wherein primary protection circuit is by the 4th semiconductor discharge tube between the first semiconductor discharge tube between being connected across Live line Zero line and the 3rd semiconductor discharge tube, zero line and the ground that are arranged between live wire and ground, delay circuit is made up of two common mode inductances, postpone and reduce the conduction interference of power interface for decoupling, and for allowing the generation of primary protection circuit prior to act, release after the energy being largely struck by lightning, then prevent residual voltage from destroying important chip by two stages of circuit.The protection circuit can meet lightning Protection requirement of the product in various International Certifications, and take into account the conduction interference for reducing power port, prevent the anti-power network that pours into of the noise of power supply chip from being damaged to power network equipment in use, and prevent that other noises have an impact to equipment operation in power network.
Description
Technical field
It the utility model is related to that outdoor terminals class communication system equipment is anti-lightning strike and overvoltage protection field, more particularly to it is anti-
A kind of lightning Protection circuit engineering, and in particular to anti-lightning strike protection circuit of outdoor terminals class communication equipment power port.
Background technology
During the broiling summer, thunderstorm is very normal phenomenon, but the often communication to outdoor of serious thunderstorm weather
Equipment belt carrys out very serious destruction, in addition it is dangerous when can be related to the life security of people.In order to prevent the occurrence of this kind of, letter
Breath Estate Division is also released to adding the classification standard of lightning Protection, follow-up each communication common carrier in the national standard of this kind equipment
Oneself a set of lightning Protection standard.
The thunderbolt design of in general power supply is the simple anti-overpressure problems for solving interface, most of to have lightning protection function
Circuit be all made up of protection devices such as gas-discharge tube, TVS pipes (transient voltage suppressor), such as traditional power supply
It is general only to add gas-discharge tube on both positive and negative polarity, but because gas-discharge tube reacts actuation time slow and long-term action
Component failure can be caused quickly, although and such design it is very convenient, but run into that noise conditions are badly regional, and use environment is multiple
When miscellaneous, power interface is easily disturbed by conduction interference, even if thunderbolt energy will not break equipment, but fraction indirect lightning strike
Energy can also make equipment operation abnormal by Conduction Interference, and how both protection equipment ensures equipment again not by crushing blow
Can normal operation, will not because of thunderbolt energy cause equipment crash restart, preferably strengthen equipment stability, be nowadays
Urgent problem to be solved.
Utility model content
The purpose of this utility model is the shortcomings that overcoming above-mentioned prior art, there is provided one kind takes into account lightning Protection Design and anti-conduction
The anti-lightning strike protection of outdoor terminals class communication equipment power port harassing, more stablizing in the big area operation of noise circumstance is electric
Road.
To achieve these goals, the anti-lightning strike protection circuit of outdoor terminals class communication equipment power port of the present utility model
It is specific as follows：
The anti-lightning strike protection circuit of the outdoor terminals class communication equipment power port, it is mainly characterized by, and described is anti-lightning strike
Protection circuit is arranged between the live wire, zero line and ground of outdoor terminals class communication equipment power port, or is arranged at the outdoor terminals
Between the positive pole of class communication equipment power port, negative pole and ground, and described anti-lightning strike protection circuit include two-stage protection circuit and
The delay circuit being arranged between two-stage protection circuit.
It is preferred that two-stage protection circuit includes primary protection circuit and two stages of circuit, described primary protection circuit
Including the first semiconductor discharge tube, described two stages of circuit includes the second semiconductor discharge tube, and described the first half lead
Body discharge tube is connected across between the live wire and zero line of outdoor terminals class communication equipment power port or between positive pole and negative pole, described
Second semiconductor discharge tube is also connected across between the live wire and zero line of outdoor terminals class communication equipment power port or positive pole and negative pole
Between.
More preferably, the first described semiconductor discharge tube is the semiconductor discharge tube of BS3500N-C types.
More preferably, the second described semiconductor discharge tube uses the semiconductor discharge tube of BS3500M types.
More preferably, described primary protection circuit also include being disposed in the outdoor the live wire of terminal class communication equipment power port with
The 3rd semiconductor discharge tube between ground or between positive pole and ground, and it is disposed in the outdoor the zero of terminal class communication equipment power port
The 4th semiconductor discharge tube between line and ground or between negative pole and ground.
More preferably, described delay circuit includes common mode inductance, and wherein the two of common mode inductance winding is connected on outdoor respectively
On the live wire and zero line of terminal class communication equipment power port, or two windings of described common mode inductance are connected on outdoor terminals respectively
On the positive pole and negative pole of class communication equipment power port.
It is particularly preferred that described common mode inductance is 5mH, the common mode inductance of 4.5 × 10mm specifications.
Using the anti-lightning strike protection circuit of outdoor terminals class communication equipment power port of the present utility model, prolong due to therein
Slow circuit uses common mode inductance, and unconventional resistance decoupling mode, thus inhibits the conduction interference noise on power line, makes
It is more stable to obtain equipment operation.
And the anti-lightning strike protection circuit in the utility model design has used two-stage semiconductor discharge tube, because semiconductor is put
The fulgurite reaction time is fast, and through-current capacity is big, and after thunderbolt has passed through first order protection circuit, part thunderbolt energy voltage is converted to difference
Mode voltage, differential mode voltage can produce serious destruction, it is necessary to ensure electricity using second level residual voltage protection circuit to chip internal
The protectiveness and stability on road, therefore the anti-lightning strike protection circuit of the outdoor terminals class communication equipment power port has triple guarantors
Shield, the ability of existing protection common-mode voltage, has the ability of protection differential mode voltage, the safety that greatly strengthen device power supply (DPS) mouth can again
By property, lightning Protection requirement of the product in various International Certifications can be met, it is most important that the anti-lightning strike protection circuit energy
Taking into account reduces the conduction interference of power port, prevents the anti-power network that pours into of the noise of power supply chip from being damaged to power network equipment in use,
And prevent that other noises have an impact to equipment operation in power network.
Brief description of the drawings
Fig. 1 is a kind of specific real of the anti-lightning strike protection circuit of outdoor terminals class communication equipment power port of the present utility model
Apply the circuit theory diagrams in example.
Fig. 2 is a kind of specific real of the anti-lightning strike protection circuit of outdoor terminals class communication equipment power port of the present utility model
Apply the primary protection circuit (addition of the first common mode inductance in delay circuit) in example.
Fig. 3 is a kind of specific real of the anti-lightning strike protection circuit of outdoor terminals class communication equipment power port of the present utility model
Apply the two stages of circuit (addition of the second common mode inductance in delay circuit) in example.
Reference
The semiconductor discharge tubes of TSS1 first
The semiconductor discharge tubes of TSS2 second
The semiconductor discharge tubes of TSS3 the 3rd
The semiconductor discharge tubes of TSS4 the 4th
L live wires
N zero lines
Embodiment
In order to more clearly describe technology contents of the present utility model, enter traveling one with reference to specific embodiment
The description of step.
The anti-lightning strike protection circuit of the outdoor terminals class communication equipment power port is arranged at outdoor terminals class communication equipment electricity
Between live wire L, the zero line N and ground of source mouth, or between the positive pole of power port, negative pole and ground, and described anti-lightning strike protection circuit
Including two-stage protection circuit and the delay circuit being arranged between two-stage protection circuit.
Fig. 2 and Fig. 3 are referred to, two-stage protection circuit includes primary protection circuit and two stages of circuit, described one-level
Protection circuit includes the first semiconductor discharge tube TSS1, and be disposed in the outdoor the live wire L of terminal class communication equipment power port with
The 3rd semiconductor discharge tube TSS3 between ground or between positive pole and ground, and it is disposed in the outdoor terminal class communication equipment power port
Zero line N and ground between or the 4th semiconductor discharge tube TSS4 between negative pole and ground.Described two stages of circuit includes the
Two semiconductor discharge tube TSS2, and the first described semiconductor discharge tube TSS1 is connected across outdoor terminals class communication equipment power port
Live wire L and zero line N between or positive pole and negative pole between, the second described semiconductor discharge tube TSS2 is also connected across outdoor terminals
Between the live wire L and zero line N of class communication equipment power port or between positive pole and negative pole.The first described semiconductor discharge tube TSS1
For the semiconductor discharge tube of BS3500N-C types.The second described semiconductor discharge tube TSS2 is put using the semiconductor of BS3500M types
Fulgurite.
Described delay circuit includes common mode inductance, and two windings of common mode inductance are connected on the communication of outdoor terminals class and set respectively
On the live wire L and zero line N of stand-by power source mouth, or it is connected on respectively on the positive pole and negative pole of outdoor terminals class communication equipment power port.Institute
The common mode inductance stated is 5mH, the common mode inductance of 4.5 × 10mm specifications.
Referring to Fig. 1, in a kind of specific embodiment, outdoor terminals class communication equipment power port in the utility model
Anti-lightning strike protection circuit, including primary protection circuit and two stages of circuit, and be arranged between above-mentioned two-stage protection circuit
Delay circuit, wherein primary protection circuit include be connected across between live wire L and zero line N (or between power positive cathode) first
The 3rd semiconductor discharge tube TSS3 between semiconductor discharge tube TSS1, and live wire L and ground or between positive pole and ground, and zero line N
The 4th semiconductor discharge tube TSS4 between ground or between negative pole and ground, two stages of circuit include being connected across live wire L and zero line N it
Between (or between power positive cathode) the second semiconductor discharge tube TSS2.
It is because semiconductor discharge tube has following property to be used herein as semiconductor discharge tube：
When the applied voltage of semiconductor discharge tube is less than its operation voltage, leakage current is minimum, equivalent to open circuit, when additional
For voltage further after increase, two interpolars will be discharged breakdown, be converted into conduction state by original state of insulation, now this is partly led
Body discharge tube is equivalent to short circuit, and can release very big electric current, and after applied voltage removes, semiconductor discharge tube can recover open circuit
State.Semiconductor discharge tube can reuse and bi-directional configuration, and can release two-way overvoltage.
And delay circuit includes two common mode inductances, respectively the first common mode inductance and the second common mode inductance, and two common
Mould inductance is arranged between primary protection circuit and two stages of circuit, and as seen from Figure 1, first is serially connected with live wire L
First winding of common mode inductance and the first winding of the second common mode inductance, be serially connected with zero line N the second of the first common mode inductance around
Second winding of group and the second common mode inductance.
Arrangement space can also be saved using semiconductor discharge tube (between power positive cathode) between live wire L and zero line N,
And primary protection circuit connects the delay circuit being made up of two common mode inductances afterwards, postpone for decoupling and reduce power interface
Conduction interference, and herein using common mode inductance purpose be allow first order protection circuit can preferentially generation act because
Two stages of circuit, which starts, can comparatively fast cause first order circuit malfunction, and two stages of circuit assume responsibility for all thunderbolt energy, reach
Less than the purpose of anti-lightning strike protection circuit.Also connect (between power positive cathode) between the live wire L and zero line N of delay circuit rear end
The second semiconductor discharge tube TSS2 is connected to, as the second protection circuit.Second protection circuit is used to prevent first order protection electricity
The too high destruction important chip of residual voltage on road.
I.e. when very big voltage caused by thunderbolt, due to common mode inductance decoupling delayed-action, first order semiconductor discharge tube
It is preferential to start, most of energy is released to protecting field in a short period of time, remaining residual voltage passes through being total in delay circuit
Mould inductance reaches two stages of circuit, and now the second semiconductor discharge tube TSS2 applied voltage is more than operation voltage, then starts
Residue thunderbolt energy is further released, so as to which residual voltage be preferably minimized so that operating die is without damage.
Lightning resistance using the outdoor terminals class communication equipment power port of the anti-lightning strike protection circuit shown in Fig. 1 can join
Number is as follows：
(1) lightning waveform (10/700us), built-in 40 Ohmic resistance, live wire L/ zero lines N (power positive cathode) over the ground, can be held
At least 6000V can be born to zero line N by 6000V, live wire L (positive source is to negative pole).
(2) composite wave (1.2/50us, 8/20us), built-in 42 Ohmic resistance, live wire L/ zero lines N (power positive cathode) are right
Ground, can bear 6000V, and live wire L can bear at least 6000V to zero line N (positive source is to negative pole).
Using the anti-lightning strike protection circuit of outdoor terminals class communication equipment power port of the present utility model, prolong due to therein
Slow circuit uses common mode inductance, and unconventional resistance decoupling mode, thus inhibits the conduction interference noise on power line, makes
It is more stable to obtain equipment operation.
And the anti-lightning strike protection circuit in the utility model design has used two-stage semiconductor discharge tube, because semiconductor is put
The fulgurite reaction time is fast, and through-current capacity is big, and after thunderbolt has passed through first order protection circuit, part thunderbolt energy voltage is converted to difference
Mode voltage, differential mode voltage can produce serious destruction, it is necessary to ensure electricity using second level residual voltage protection circuit to chip internal
The protectiveness and stability on road, therefore the anti-lightning strike protection circuit of the outdoor terminals class communication equipment power port has triple guarantors
Shield, the ability of existing protection common-mode voltage, has the ability of protection differential mode voltage, the safety that greatly strengthen device power supply (DPS) mouth can again
By property, lightning Protection requirement of the product in various International Certifications can be met, it is most important that the anti-lightning strike protection circuit energy
Taking into account reduces the conduction interference of power port, prevents the anti-power network that pours into of the noise of power supply chip from being damaged to power network equipment in use,
And prevent that other noises have an impact to equipment operation in power network.
In this description, the utility model is described with reference to its specific embodiment.But it is clear that still can be with
Various modification can be adapted and conversion is without departing from spirit and scope of the present utility model.Therefore, specification and drawings are considered as
It is illustrative and not restrictive.
Claims (7)
1. a kind of anti-lightning strike protection circuit of outdoor terminals class communication equipment power port, it is characterised in that described is anti-lightning strike anti-
Protection circuit is arranged between the live wire, zero line and ground of outdoor terminals class communication equipment power port, or is arranged at the outdoor terminals class
Between the positive pole of communication equipment power port, negative pole and ground, and described anti-lightning strike protection circuit includes two-stage protection circuit and set
The delay circuit being placed between two-stage protection circuit.
2. the anti-lightning strike protection circuit of outdoor terminals class communication equipment power port according to claim 1, it is characterised in that
Two-stage protection circuit includes primary protection circuit and two stages of circuit, and described primary protection circuit is put including the first semiconductor
Fulgurite, described two stages of circuit includes the second semiconductor discharge tube, and the first described semiconductor discharge tube is connected across room
Between the live wire and zero line of outer terminal class communication equipment power port or between positive pole and negative pole or, the second described semiconductor electric discharge
Pipe is also connected across between the live wire and zero line of outdoor terminals class communication equipment power port or between positive pole and negative pole.
3. the anti-lightning strike protection circuit of outdoor terminals class communication equipment power port according to claim 2, it is characterised in that
The first described semiconductor discharge tube is the semiconductor discharge tube of BS3500N-C types.
4. the anti-lightning strike protection circuit of outdoor terminals class communication equipment power port according to claim 2, it is characterised in that
The second described semiconductor discharge tube uses the semiconductor discharge tube of BS3500M types.
5. the anti-lightning strike protection circuit of outdoor terminals class communication equipment power port according to claim 2, it is characterised in that
Described primary protection circuit also include be disposed in the outdoor between the live wire and ground of terminal class communication equipment power port or positive pole with
The 3rd semiconductor discharge tube between ground, and be disposed in the outdoor between the zero line and ground of terminal class communication equipment power port or bear
The 4th semiconductor discharge tube between pole and ground.
6. the anti-lightning strike protection circuit of outdoor terminals class communication equipment power port according to claim 2, it is characterised in that
Described delay circuit includes common mode inductance, and wherein the two of common mode inductance winding is connected on outdoor terminals class communication equipment electricity respectively
On the live wire and zero line of source mouth, or two windings of described common mode inductance are connected on outdoor terminals class communication equipment power port respectively
Positive pole and negative pole on.
7. the anti-lightning strike protection circuit of outdoor terminals class communication equipment power port according to claim 6, it is characterised in that
Described common mode inductance is 5mH, the common mode inductance of 4.5 × 10mm specifications.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720411148.3U CN206759048U (en) | 2017-04-19 | 2017-04-19 | The anti-lightning strike protection circuit of outdoor terminals class communication equipment power port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720411148.3U CN206759048U (en) | 2017-04-19 | 2017-04-19 | The anti-lightning strike protection circuit of outdoor terminals class communication equipment power port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206759048U true CN206759048U (en) | 2017-12-15 |
Family
ID=60614238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720411148.3U Active CN206759048U (en) | 2017-04-19 | 2017-04-19 | The anti-lightning strike protection circuit of outdoor terminals class communication equipment power port |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206759048U (en) |
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2017
- 2017-04-19 CN CN201720411148.3U patent/CN206759048U/en active Active
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