CN105162102A - Lightning protection grounding-free isolation transformer and application of lightning protection grounding-free isolation transformer to lightning protection for communication broadband box and electric energy gatherer - Google Patents
Lightning protection grounding-free isolation transformer and application of lightning protection grounding-free isolation transformer to lightning protection for communication broadband box and electric energy gatherer Download PDFInfo
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- CN105162102A CN105162102A CN201410267409.XA CN201410267409A CN105162102A CN 105162102 A CN105162102 A CN 105162102A CN 201410267409 A CN201410267409 A CN 201410267409A CN 105162102 A CN105162102 A CN 105162102A
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- isolation transformer
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- 238000002955 isolation Methods 0.000 title claims abstract description 25
- 238000004891 communication Methods 0.000 title claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims abstract description 17
- 238000009413 insulation Methods 0.000 claims description 23
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 208000033999 Device damage Diseases 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The invention discloses a lightning protection grounding-free isolation transformer and applications of a lightning protection grounding-free isolation transformer to lightning protection for a communication broadband box and an electric energy gatherer. The lightning protection grounding-free isolation transformer comprises a housing. An isolation transformer with a lightning protection function and a lightning protection isolation circuit are disposed in the housing. One end of the housing is the input end of the lightning protection circuit, and the input end is connected to a commercial power supply. The other end of the housing is the output end of the lightning protection circuit, and the output end is connected to protected equipment. The lightning protection isolation transformer is in series connection between the commercial power input and a communication broadband box or between a power supply of an electric energy gatherer and a signal port or between monitoring cameras to achieve lightning protection effect. The lightning protection isolation transformer has a semi-isolation protection mode and a full-isolation protection mode. The beneficial effects are that a power supply port can be individually protected, a power supply port and a signal port also can be protected together, the engineering investment is low, construction and maintenance are simple, a ground network is not need, the problems that broadband access network points, electric energy gatherers and monitoring cameras cannot be grounded normally to realize a lightning protection effect are solved.
Description
Technical field
The present invention relates to lightning protection technical field of electric equipment, particularly relate to a kind of lighting protection isolated transformer and carry out the application in lightning protection at the power supply of communication bandwidth case and energy harvester and signal port, monitoring camera.
Background technology
The broadband access network such as wide-band exchange unit, EPON point, electric power system energy harvester and monitoring camera are the severely afflicated areas of Lightning Disaster, often because a thunderbolt causes a sheet of site fault, cause a large number of users to complain, have a strong impact on the fail safe of broadband services.And electric power system energy harvester is once fault, electric quantity data then cannot be uploaded or collective loses.Traditional lightening arresting method by lightning protection component by thunder energy by earth mat release into (must ground connection just work, and have requirement to resistance value), but there is the problems such as construction investment is large, installation and maintenance is complicated and be difficult to extensive enforcement, particularly earth mat construction the engineering link therefore becoming difficulty the most such as to obstruct due to condition restriction, resident.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of lighting protection isolated transformer and carrying out the application in lightning protection at the power supply of communication bandwidth case and energy harvester and signal port, monitoring camera.
The technical solution adopted in the present invention is: a kind of lighting protection isolated transformer, comprise housing, the both sides of housing are provided with mounting edge, mounting edge is provided with installing hole, the isolating transformer with lightning protection function and lightning protection buffer circuit is provided with in described housing, shell one end is lightning protection circuit input termination mains supply, and the other end is for exporting the protected equipment of termination, and described lightning protection circuit comprises input port, attenuation compensation circuit, isolated location, output port, described attenuation compensation circuit comprises the first piezo-resistance (M1), first resistance (R1), second resistance (R2), 3rd resistance (R3), 4th resistance (R4), first electric capacity (C1), second electric capacity (C2), 3rd electric capacity (C3), first coil (L1), second coil (L2), common mode choke coil (L3), the first piezo-resistance (M1) parallel connection between the inputs, the first coil (L1), second coil (L2) is connected on input respectively, be connected in parallel between the first coil (L1) and the second coil (L2) end after first electric capacity (C1) and the first resistance (R1) series connection, first electric capacity (C1) and the first resistance (R1) common mode choke coil in parallel (L3) afterwards, isolated location in parallel afterwards, isolated location output the second piezo-resistance (M2) in parallel.
As the preferred embodiment of this programme, described isolated location adopts the isolating transformer of 1: 1.
As the preferred embodiment of this programme, its impulse withstand voltage level impulse withstand voltage level be between the former limit of lighting protection isolated transformer, secondary and shell is greater than 30kV (1.2/50us surge voltage ripple), and surge voltage transfer ratio average level is less than 1/50.
As the preferred embodiment of this programme, the input of described lightning protection circuit is also provided with fuse (FU).
As the preferred embodiment of this programme, described the first piezo-resistance (M1) and the second piezo-resistance (M2) are connected a fuse respectively.
A kind of lighting protection isolated transformer of the present invention carries out the application in lightning protection at the power supply of communication bandwidth case and energy harvester and signal port, monitoring camera, the lighting protection isolated transformer of preceding claim is connected on civil power input and communication bandwidth case or electric energy and adopts between the power supply of two storages and signal port or monitoring camera and form lightening protection.
As the preferred embodiment of this programme, described lightening protection is divided into half isolation and full isolation two kinds of protected modes.
As the preferred embodiment of this programme; half described insulation blocking mode is that power port is connected above-mentioned isolating transformer; equipment adopts insulation cabinet and surrounding to ensure certain dielectric strength; inlet wire also adopts insulation joint box and equipment to ensure certain dielectric strength; inlet wire is connected on equipment according to normal mode, and whole system only has inlet wire to be introduced directly in system.
As the preferred embodiment of this programme; described full insulation blocking mode is: power port is connected above-mentioned isolating transformer; equipment adopts insulation cabinet and surrounding to ensure certain dielectric strength; inlet wire also adopts insulation joint box and equipment to ensure certain dielectric strength; the outside inlet wire introduced also adopts isolating transformer to isolate; whole system is in a state of entirely isolating, and is introduced directly in system without any cable.
Compared with prior art, the invention has the beneficial effects as follows: the method adopting isolation, namely can provide a safety, pure protected mode for protected equipment, reduce lightning strike probability, more can reduce the error rate of Signal transmissions.Owing to adopting advanced isolation technology, without the need to structure and the form of any change existing equipment, also without the need to doing earth mat and ground connection, time a few minutes is only needed to install.Very simple, very practical, expense is but low than comprehensive reformation expense, is the trend of this type of system thunder defending development.In addition; due to power isolation transformer outlet side isolated neutral; now equipment electric power system becomes IT supply power mode; this supply power mode can guarantee its electrical safety for broadband access site among a small circle, electric power energy harvester, monitoring camera; can protect power port separately, also power port and signal port protection can be integrated in one.Have that construction investment is little, construction and safeguard simple, without the need to arranging the features such as earth mat, efficiently solve the Lightning Protection of broadband access site and energy harvester, and significantly improve Technological Economy ratio, thoroughly solve and be similar to communication bandwidth case, electric power energy harvester, monitoring camera constant power is little, quantity large, lightning protection under equipment deployment conditions and cannot the problem of ground connection.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is internal circuit diagram of the present invention;
Fig. 2 is shell figure of the present invention;
Fig. 3 is communication bandwidth case half insulation blocking mode figure of the present invention;
Fig. 4 is the full insulation blocking mode figure of communication bandwidth case of the present invention;
Fig. 5 is lightning protection mode schematic diagram of the present invention.
Fig. 6 is prior art lightening arresting method schematic diagram.
Embodiment
In order to more clearly understand technical scheme of the present invention, below in conjunction with accompanying drawing, the present invention is further described.
As Fig. 1, of the present invention a kind of lighting protection isolated transformer shown in Fig. 2, comprise housing, the both sides of housing are provided with mounting edge, mounting edge is provided with installing hole, the isolating transformer with lightning protection function and lightning protection buffer circuit is provided with in described housing, shell one end is lightning protection circuit input termination mains supply, the other end is for exporting the protected equipment of termination, described lightning protection circuit comprises input port, attenuation compensation circuit, isolated location, output port, described attenuation compensation circuit comprises the first piezo-resistance (M1), first resistance (R1), second resistance (R2), 3rd resistance (R3), 4th resistance (R4), first electric capacity (C1), second electric capacity (C2), 3rd electric capacity (C3), first coil (L1), second coil (L2), common mode choke coil (L3), first piezo-resistance (M1) parallel connection between the inputs, first coil (L1), second coil (L2) is connected on input respectively, be connected in parallel between the first coil (L1) and the second coil (L2) end after first electric capacity (C1) and the first resistance (R1) series connection, first electric capacity (C1) and the first resistance (R1) common mode choke coil in parallel (L3) afterwards, isolated location in parallel afterwards, isolated location output the second piezo-resistance (M2) in parallel, isolated location adopts the isolating transformer of 1: 1, the input of lightning protection circuit is also provided with fuse (FU), first piezo-resistance (M1) and the second piezo-resistance (M2) are connected a fuse respectively, its impulse withstand voltage level is the impulse withstand voltage level between the former limit of lighting protection isolated transformer, secondary and shell, generally should not be less than 30kV (1.2/50us surge voltage ripple).The ability of surge voltage transfer ratio examination lighting protection isolated transformer " filtration " surge voltage, consider the tolerance level of rear class access network equipment, its average level is less than 1/50, the piezo-resistance selecting through-current capacity large is released over the ground, the lightning wave amplitude that process is released and electric current are certain to weaken, again by multistage low-pass filter circuit, further amplitude limit limit is carried out frequently to lightning wave, because the inductance in circuit can produce back electromotive force to high frequency lightning wave, in high impedance, the intrusion of lightning wave can be stopped, sealing in of high-frequency impulse can be limited simultaneously, at ordinary times can to power supply clutter under situation, harmonic wave carries out filtering.After again through 1: 1 isolating transformer isolation, can stop the transmission of the noises such as a part of harmonic wave further by shielding separator, again reduce the interference of high frequency transient to a certain extent, the voltage of systems stabilisation.
A kind of lighting protection isolated transformer of the present invention is at the power supply of communication bandwidth case and energy harvester and signal port, monitoring camera carries out the application of lightning protection aspect, the lighting protection isolated transformer of preceding claim is connected between civil power input and the power supply of communication bandwidth case or energy harvester and signal port or monitoring camera and forms lightening protection as Fig. 5, described lightening protection is divided into half isolation and full isolation two kinds of protected modes, the lightning-protection method of prior art as shown in Figure 6, ground connection is needed just to shield, and resistance value be there are certain requirements.
Adopt half insulation blocking method; for communication bandwidth case; as shown in Figure 3: for power port; adopt the isolating transformer of high withstand voltage level and low surge voltage transfer ratio; equipment adopts insulation cabinet or other insulation measures and surrounding to ensure certain dielectric strength, and optical cable metallic strength member also adopts insulation joint box and equipment to ensure certain dielectric strength.Netting twine is connected on equipment according to normal mode, therefore whole system only has netting twine to be introduced directly in system, because civil power inlet port, grounding ports and optical cable interface have all made isolation or insulation measures, these ports no longer include the intrusion of lightning overvoltage.Although lightning overvoltage can invade equipment by netting twine, because entirety is floating neutral system, power port is also isolated by isolating transformer, although the current potential of entire system has lifting relative to zero potential, can not produce power supply, potential difference between ground connection and signal port.In theory, the minimum value that the lightning overvoltage that equipment now can bear is isolating transformer, rack insulate shock-resistant ability.
And for the potential difference between different netting twine; when being struck by lightning, on netting twine, the polarity of induced voltage is identical; potential difference between so different netting twine is smaller, and device signal port itself possesses overvoltage protecting device, and therefore device damage probability is very low.
Adopt full insulation blocking method; for communication bandwidth case; as shown in Figure 4: the difference of this mode and " half isolation " protected mode is that the outside netting twine introduced also adopts isolating transformer to isolate; such whole system is in a state of entirely isolating; be introduced directly in system without any cable; because whole system is in the state of full isolation, therefore overall coefficient of safety comparatively " half isolation " protected mode is higher.And now equipment can bear higher lightning overvoltage.In theory, above-mentioned insulation be punctured and cause device damage, must the insulation of at least two places or isolate corrupt, the lightning overvoltage therefore needed is the two shock-resistant ability sums in place, and to be therefore compared to half insulation blocking pattern higher for its margin of safety.
Identical with broadband case protected mode in electric power energy harvester, the first-class protected mode of monitoring camera, using method is identical.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (9)
1. ground connection isolating transformer is exempted from a lightning protection, comprise housing, the both sides of housing are provided with mounting edge, mounting edge is provided with installing hole, the isolating transformer with lightning protection function and lightning protection buffer circuit is provided with in described housing, shell one end is lightning protection circuit input termination mains supply, and the other end, for exporting the protected equipment of termination, is characterized in that: described lightning protection circuit comprises input port, attenuation compensation circuit, isolated location, output port, described attenuation compensation circuit comprises the first piezo-resistance (M1), first resistance (R1), second resistance (R2), 3rd resistance (R3), 4th resistance (R4), first electric capacity (C1), second electric capacity (C2), 3rd electric capacity (C3), first coil (L1), second coil (L2), common mode choke coil (L3), the first piezo-resistance (M1) parallel connection between the inputs, the first coil (L1), second coil (L2) is connected on input respectively, be connected in parallel between the first coil (L1) and the second coil (L2) end after first electric capacity (C1) and the first resistance (R1) series connection, first electric capacity (C1) and the first resistance (R1) common mode choke coil in parallel (L3) afterwards, isolated location in parallel afterwards, isolated location output the second piezo-resistance (M2) in parallel.
2. ground connection isolating transformer is exempted from a kind of lightning protection according to claim 1, it is characterized in that: described isolated location adopts the isolating transformer of 1: 1.
3. ground connection isolating transformer is exempted from a kind of lightning protection according to claim 1, it is characterized in that: its impulse withstand voltage level impulse withstand voltage level be between the former limit of lighting protection isolated transformer, secondary and shell is greater than 30kV (1.2/50us surge voltage ripple), and surge voltage transfer ratio average level is less than 1/50.
4. ground connection isolating transformer is exempted from a kind of lightning protection according to claim 1, it is characterized in that: the input of described lightning protection circuit is also provided with fuse (FU).
5. ground connection isolating transformer is exempted from a kind of lightning protection according to claim 1, it is characterized in that: described the first piezo-resistance (M1) and the second piezo-resistance (M2) are connected a fuse respectively.
6. the application that ground connection isolating transformer carries out in lightning protection at the power supply of communication bandwidth case and energy harvester and signal port, monitoring camera is exempted from lightning protection, it is characterized in that: be connected on by the lighting protection isolated transformer described in claim 1-4 between the power supply of civil power input and communication bandwidth case or energy harvester and signal port or monitoring camera and form lightening protection.
7. the application that ground connection isolating transformer carries out in lightning protection at the power supply of communication bandwidth case and energy harvester and signal port, monitoring camera is exempted from a kind of lightning protection according to claim 6, it is characterized in that: described lightening protection is divided into half isolation and full isolation two kinds of protected modes.
8. the application that ground connection isolating transformer carries out in lightning protection at the power supply of communication bandwidth case and energy harvester and signal port, monitoring camera is exempted from a kind of lightning protection according to claim 7; it is characterized in that: half described insulation blocking mode is that power port is connected above-mentioned isolating transformer; equipment adopts insulation cabinet and surrounding to ensure certain dielectric strength; inlet wire also adopts insulation joint box and equipment to ensure certain dielectric strength; inlet wire is connected on equipment according to normal mode, and whole system only has inlet wire to be introduced directly in system.
9. a kind of lightning protection according to claim 7 exempts from ground connection isolating transformer at the power supply of communication bandwidth case and energy harvester and signal port, monitoring camera carries out the application of lightning protection aspect, it is characterized in that: described full insulation blocking mode is: power port is connected above-mentioned isolating transformer, equipment adopts insulation cabinet and surrounding to ensure certain dielectric strength, inlet wire also adopts insulation joint box and equipment to ensure certain dielectric strength, the outside inlet wire introduced also adopts isolating transformer to isolate, whole system is in a state of entirely isolating, be introduced directly in system without any cable.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410267409.XA CN105162102A (en) | 2014-06-09 | 2014-06-09 | Lightning protection grounding-free isolation transformer and application of lightning protection grounding-free isolation transformer to lightning protection for communication broadband box and electric energy gatherer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410267409.XA CN105162102A (en) | 2014-06-09 | 2014-06-09 | Lightning protection grounding-free isolation transformer and application of lightning protection grounding-free isolation transformer to lightning protection for communication broadband box and electric energy gatherer |
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| CN105162102A true CN105162102A (en) | 2015-12-16 |
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| CN201410267409.XA Pending CN105162102A (en) | 2014-06-09 | 2014-06-09 | Lightning protection grounding-free isolation transformer and application of lightning protection grounding-free isolation transformer to lightning protection for communication broadband box and electric energy gatherer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510185A (en) * | 2018-12-07 | 2019-03-22 | 北京世纪瑞尔技术股份有限公司 | A kind of signal isolating device of anti-electric railway traction reflux interference |
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| CN103840447A (en) * | 2014-02-26 | 2014-06-04 | 中国联合网络通信集团有限公司 | Lightning protection system and method |
| CN203967743U (en) * | 2014-06-09 | 2014-11-26 | 山东纵深科技发展有限公司 | Ground connection isolating transformer is exempted from a kind of lightning protection |
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2014
- 2014-06-09 CN CN201410267409.XA patent/CN105162102A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101719665A (en) * | 2009-12-24 | 2010-06-02 | 迈普通信技术股份有限公司 | Ethernet port lightning protection device and lightning protection circuit |
| CN202058567U (en) * | 2011-05-05 | 2011-11-30 | 南海发展股份有限公司 | Lightning-proof isolation transformer |
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