CN207426689U - A kind of communication power supply shock wave absorber - Google Patents
A kind of communication power supply shock wave absorber Download PDFInfo
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- CN207426689U CN207426689U CN201721390988.2U CN201721390988U CN207426689U CN 207426689 U CN207426689 U CN 207426689U CN 201721390988 U CN201721390988 U CN 201721390988U CN 207426689 U CN207426689 U CN 207426689U
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- power supply
- communication power
- shock wave
- wave absorber
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Abstract
The utility model is related to safety devices, more particularly to a kind of communication power supply shock wave absorber, including shell and electric loop, the electric loop is set inside the housing, it is set on the shell there are three interface, is respectively positive terminal mouth, negative terminal mouth and ground connection connection jaws；Electric loop is made of 2 varistors, 2 temperature safety tubes, 2 patch type ceramic gas discharge diodes, one varistor and a temperature safety tube are in parallel after connecting respectively, two discharge diode parallel connections, two sections in series in parallel, ground wire is connected between two parallel connection parts, anode terminates at the positive bus-bar of the small busbar of communication power supply direct current, and ground terminal connects with shielding the grounding copper bar of cabinet, and cathode terminates at the negative busbar of the small busbar of communication power supply direct current.The utility model has the advantage of：This shock wave absorber, which has, prevents alternating component from sealing in communication power supply, while prevents communication power supply overvoltage and anti-lightning strike, and then protects communication device safety.
Description
Technical field
The utility model is related to safety device more particularly to a kind of communication power supply shock wave absorbers.
Background technology
Very great effect is played in our factory communication equipment, bears our factory with reconciling what headpool tune communicated in Guangdong
Important mission, once our factory harmonically adjusts communication disruption in, it will and our factory is caused to become isolated station, power grid can not be received
Scheduling, in some instances it may even be possible to cause to impact to power grid, endanger power grid security, while great harm can be also caused to our factory.
As ethernet technology, optical fiber technology, microelectric technique, large scale integrated circuit, intellectualized technology are set in communication
Extensive use in standby so that the requirement of requirement and lightning protection of the various communication equipments to overvoltage is higher and higher.On-scene communication is set
It is standby to be damaged by broken by lightning so as to cause communication equipment, the thing that controlled device trips is caused also to happen occasionally, our factory is made
Into great economic loss.
The power supply of our factory communication equipment is -48V DC power supplies (plus earth), admissible voltage fluctuation scope for -40V to -
57V forms dc bus, 48V switching high-frequency power charging modules using 48V HF switches charging module and 24 2V accumulators
Incoming power is exchange 380V power supplys, considers that shock wave absorber will realize that 380V ac components seal in the excessively electric of DC loop
Pressure is protected and realizes anti-lightning strike protection, and main design thought carries out in terms of following two：
Firstth, alternating component, which seals in communication power supply dc bus, can cause overvoltage, utilize the C-V characteristic of varistor
Alternating component is introduced into the earth.
Secondth, consider the anti-lightning strike protection to DC loop, thunder and lightning is introduced by the earth using gas-discharge tube.Gas discharge
Pipe is a kind of switching mode protection device, and operation principle is gas discharge.When two voltage across poles are sufficiently large, pole clearance will discharge
Breakdown, conduction state is converted by original state of insulation.
Utility model content
To solve the above problems, we have proposed a kind of communication power supply shock wave absorbers, having prevents alternating component string
Enter into communication power supply, while prevent communication power supply overvoltage and anti-lightning strike, and then protect communication device safety.
To realize the demand, the utility model is achieved through the following technical solutions above-mentioned purpose：A kind of communication power supply
Shock wave absorber, including shell and electric loop, the electric loop is set inside the housing, and three are provided on the shell
A interface is respectively positive terminal mouth, negative terminal mouth and ground connection connection jaws；Electric loop is by 2 varistors, 2 temperature
After protective tube, 2 patch type ceramic gas discharge diode compositions, a varistor and a temperature safety tube are connected respectively
Parallel connection, two discharge diode parallel connections, two sections in series in parallel are connected with ground wire, anode between two parallel connection parts
The positive bus-bar of the small busbar of communication power supply direct current is terminated at, ground terminal connects with shielding the grounding copper bar of cabinet, and cathode terminates at communication electricity
The negative busbar of the small busbar of source direct current.
Further, a kind of communication power supply shock wave absorber, the model 820KD20 of the varistor.
Further, a kind of communication power supply shock wave absorber, the model SF91E of the temperature safety tube.
Further, a kind of communication power supply shock wave absorber, the model of the patch type ceramic gas discharge diode
For WR5750-SMD, through-current capacity 3KA, operating voltage 90V.
A kind of communication power supply provided by the utility model spits ripple absorption plant, according to the electrical characteristic of varistor, selects
The characteristic taken shelter from the thunder by the varistor of zinc oxide material similar to zinc oxide, electricity was either operated when there is external Lightning Over-voltage
During pressure, thunder and lightning and excessively high voltage can just be guided into the earth by Zinc-Oxide Arrester, so as to play the role of protecting electrical equipment, therefore
Two one ends of pin of varistor are connected on the positive bus-bar of the small busbar of direct current in the design, another pin is connected on the small mother of direct current
It is DC48V according to dc bus normal voltage in the negative busbar of line, considers the voltage range of communication power supply for -40V to -57V,
Using the 820KD20 varistors of monarch's credit electronics production, electric parameter is as follows：Working volts alternating current (root-mean-square value) VAC=
50V, direct-current working volts VDC=65V, maximum surge current (peak point current) imax (8/20 μ s)=10000A.
It is bigger in view of nominal discharge current, therefore the varistor of two similary specifications and models is used to carry out parallel connection, together
When two ceramic gas discharge tubes are sealed between anode and protective grounding pole PE.
Gas-discharge tube is a kind of switching mode protection device, and operation principle is gas discharge.When two voltage across poles are sufficiently large
When, discharge breakdown is converted into conduction state by pole clearance by original state of insulation, similar short circuit.The two poles of the earth under conduction state
Between the voltage that maintains it is very low, generally in 20~50V, therefore the effect of protection late-class circuit can be played.The sound of gas-discharge tube
Hundreds of ns can be reached between seasonable so that counting ms, be most slow in device is protected.When the Lightning Over-voltage on cable makes lightning protection
During gas-discharge tube puncture short in device, initial breakdown voltage is essentially the impact flashover voltage of gas-discharge tube, electric discharge
Two interpolar maintenance voltages drop to 20~50V after pipe breakdown conducting, and communication equipment will not be impacted.It is selected according to application environment
It is WR5750-SMD with specifications and models, through-current capacity 3KA, operating voltage is the patch type ceramic gas discharge diode of 90V.
In view of being typically short circuit when varistor punctures, the breakdown of varistor in order to prevent causes power supply short circuit to rise
Fire, can connect a temperature safety tube or hot releasing mechanism on each varistor.Temperature safety tube should be with varistor
There is good thermal coupling, when pressure responsive resistor failure (high resistant resistance to shorting), heat caused by it fuses temperature safety tube, from
And separate the varistor of failure and circuit, it is ensured that the safety of equipment.When higher power frequency temporary overvoltage act on it is pressure-sensitive
When on resistance, varistor moment puncture short (low impedance short circuit) may be made, and temperature safety tube also has little time to fuse, and may be used also
It can be on fire.For this phenomenon is avoided to occur, the impact resistance power frequency fuse that considers to connect again on each varistor (is applied alone
Power frequency fuse may not then fuse in ageing failure).The temperature safety tube of model SF91E is selected, electric parameter is
Maximum voltage 250V, maximum current 15A keep electric current 15A, 94 ± 3/1 DEG C of operating temperature, in 94 DEG C of temperature-control range.Glass fiber
Protective tube uses the fastp-acting fuse of QH productions, and maximum voltage 250V, maximum current 1515A keep electric current 15A.
The beneficial effects of the utility model are：This shock wave absorber, which has, prevents alternating component from sealing in communication power supply
In, while prevent communication power supply overvoltage and anti-lightning strike, and then protect communication device safety.
Description of the drawings
It 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 is clear that the accompanying drawings in the following description is this reality
With some new embodiments, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other attached drawings according to these attached drawings.
Fig. 1 is the electric loop connection diagram of the utility model；
Fig. 2 is the overall structure diagram of the utility model；
In figure, shell 1, electric loop 2.
Specific embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described.Obviously, retouched
The embodiment stated is the utility model part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, those of ordinary skill in the art's all other embodiments obtained without making creative work, belongs to
The scope of the utility model protection.
Embodiment 1:
A kind of communication power supply shock wave absorber, including shell 1 and electric loop 2, the electric loop 2 is arranged on shell
Inside is set on the shell 1 there are three interface, is respectively positive terminal mouth, negative terminal mouth and ground connection connection jaws；It is electrical to return
Route 2 varistors, 2 temperature safety tubes, 2 patch type ceramic gas discharge diodes composition, a varistor and
One temperature safety tube is in parallel after connecting respectively, two discharge diode parallel connections, two sections in series in parallel, two parallel connection portions
/ ground wire is connected with, anode terminates at the positive bus-bar of the small busbar of communication power supply direct current, the grounding copper of ground terminal and screen cabinet
Row connects, and cathode terminates at the negative busbar of the small busbar of communication power supply direct current.
The model 820KD20 of the varistor.
The model SF91E of the temperature safety tube.
The model WR5750-SMD of the patch type ceramic gas discharge diode, through-current capacity 3KA, operating voltage are
90V。
A kind of communication power supply provided in this embodiment spits ripple absorption plant, according to the electrical characteristic of varistor, select by
The varistor of zinc oxide material is similar to the characteristic taken shelter from the thunder of zinc oxide, when there is external Lightning Over-voltage either switching overvoltage
When, thunder and lightning and excessively high voltage can just be guided into the earth by Zinc-Oxide Arrester, so as to play the role of protecting electrical equipment, therefore originally
Two one ends of pin of varistor are connected on the positive bus-bar of the small busbar of direct current in design, another pin is connected on the small busbar of direct current
Negative busbar on, be DC48V according to dc bus normal voltage, consider that the voltage range of communication power supply for -40V to -57V, is adopted
The 820KD20 varistors produced with monarch's credit electronics, electric parameter are as follows：Working volts alternating current (root-mean-square value) VAC=
50V, direct-current working volts VDC=65V, maximum surge current (peak point current) imax (8/20 μ s)=10000A.
It is bigger in view of nominal discharge current, therefore the varistor of two similary specifications and models is used to carry out parallel connection, together
When two ceramic gas discharge tubes are sealed between anode and protective grounding pole PE.
Gas-discharge tube is a kind of switching mode protection device, and operation principle is gas discharge.When two voltage across poles are sufficiently large
When, discharge breakdown is converted into conduction state by pole clearance by original state of insulation, similar short circuit.The two poles of the earth under conduction state
Between the voltage that maintains it is very low, generally in 20~50V, therefore the effect of protection late-class circuit can be played.The sound of gas-discharge tube
Hundreds of ns can be reached between seasonable so that counting ms, be most slow in device is protected.When the Lightning Over-voltage on cable makes lightning protection
During gas-discharge tube puncture short in device, initial breakdown voltage is essentially the impact flashover voltage of gas-discharge tube, electric discharge
Two interpolar maintenance voltages drop to 20~50V after pipe breakdown conducting, and communication equipment will not be impacted.It is selected according to application environment
It is WR5750-SMD with specifications and models, through-current capacity 3KA, operating voltage is the patch type ceramic gas discharge diode of 90V.
In view of being typically short circuit when varistor punctures, the breakdown of varistor in order to prevent causes power supply short circuit to rise
Fire, can connect a temperature safety tube or hot releasing mechanism on each varistor.Temperature safety tube should be with varistor
There is good thermal coupling, when pressure responsive resistor failure (high resistant resistance to shorting), heat caused by it fuses temperature safety tube, from
And separate the varistor of failure and circuit, it is ensured that the safety of equipment.When higher power frequency temporary overvoltage act on it is pressure-sensitive
When on resistance, varistor moment puncture short (low impedance short circuit) may be made, and temperature safety tube also has little time to fuse, and may be used also
It can be on fire.For this phenomenon is avoided to occur, the impact resistance power frequency fuse that considers to connect again on each varistor (is applied alone
Power frequency fuse may not then fuse in ageing failure).The temperature safety tube of model SF91E is selected, electric parameter is
Maximum voltage 250V, maximum current 15A keep electric current 15A, 94 ± 3/1 DEG C of operating temperature, in 94 DEG C of temperature-control range.Glass fiber
Protective tube uses the fastp-acting fuse of QH productions, and maximum voltage 250V, maximum current 1515A keep electric current 15A.
The advantageous effect of the present embodiment is：This shock wave absorber, which has, prevents alternating component from sealing in communication power supply
In, while prevent communication power supply overvoltage and anti-lightning strike, and then protect communication device safety.
Claims (4)
1. a kind of communication power supply shock wave absorber, it is characterised in that：Including shell and electric loop, the electric loop is set
Inside the housing, set on the shell there are three interface, be respectively positive terminal mouth, negative terminal mouth and ground connection connection jaws；
Electric loop is made of 2 varistors, 2 temperature safety tubes, 2 patch type ceramic gas discharge diodes, and one pressure-sensitive
Resistance and a temperature safety tube are in parallel after connecting respectively, two discharge diode parallel connections, two sections in series in parallel, two
Ground wire is connected between parallel connection part, anode terminates at the positive bus-bar of the small busbar of communication power supply direct current, ground terminal and screen cabinet
Grounding copper bar connects, and cathode terminates at the negative busbar of the small busbar of communication power supply direct current.
2. communication power supply shock wave absorber as described in claim 1, it is characterised in that：The model of the varistor
820KD20。
3. communication power supply shock wave absorber as described in claim 1, it is characterised in that：The model of the temperature safety tube
SF91E。
4. communication power supply shock wave absorber as described in claim 1, it is characterised in that：The patch type ceramic gas discharge
The model WR5750-SMD of diode, through-current capacity 3KA, operating voltage 90V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721390988.2U CN207426689U (en) | 2017-10-25 | 2017-10-25 | A kind of communication power supply shock wave absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721390988.2U CN207426689U (en) | 2017-10-25 | 2017-10-25 | A kind of communication power supply shock wave absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207426689U true CN207426689U (en) | 2018-05-29 |
Family
ID=62308868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721390988.2U Active CN207426689U (en) | 2017-10-25 | 2017-10-25 | A kind of communication power supply shock wave absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207426689U (en) |
-
2017
- 2017-10-25 CN CN201721390988.2U patent/CN207426689U/en active Active
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