CN203967743U - Ground connection isolating transformer is exempted from a kind of lightning protection - Google Patents
Ground connection isolating transformer is exempted from a kind of lightning protection Download PDFInfo
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- CN203967743U CN203967743U CN201420313258.2U CN201420313258U CN203967743U CN 203967743 U CN203967743 U CN 203967743U CN 201420313258 U CN201420313258 U CN 201420313258U CN 203967743 U CN203967743 U CN 203967743U
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- isolating transformer
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Abstract
The utility model discloses a kind of lightning protection and exempt from ground connection isolating transformer; in housing, be provided with isolating transformer and the lightning protection buffer circuit with lightning protection function; housing one end is lightning protection circuit input termination mains supply; the other end is the protected equipment of output termination; protection structure is serially connected between protected equipment and power supply and forms plate insulation blocking mode for above-mentioned lightning protection is exempted to ground connection isolating transformer, is serially connected between protected equipment and power supply and other inlet wires and protected equipment and forms full insulation blocking.Beneficial effect: can protect power port separately; also power port and signal port protection can be integrated in one; construction investment is little, construction and safeguard simple, without the features such as earth mat are set, solved the first-class normally Lightning Protection of ground connection of broadband access site, electric energy acquisition device and monitoring camera.
Description
Technical field
The utility model relates to safety valve technical field, particularly relates to a kind of lightning protection and exempts from ground connection isolating transformer and the power supply of communication broadband case and electric energy acquisition device and signal port, monitoring camera lightning protection are exempted to the protection structure of ground connection.
background technology
The broadband access network point such as wide-band exchange unit, EPON and electric power system electric energy acquisition device 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, and have a strong impact on the fail safe of broadband services.Once and electric power system electric energy acquisition device fault, he electric quantity data 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 resistance value is had to requirement), but exist the problems such as construction investment is large, installation and maintenance is complicated, be difficult to extensive enforcement, particularly therefore earth mat construction becomes the engineering link of difficulty the most because condition restriction, resident obstruct etc.。
utility model content
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of lightning protection to exempt from ground connection isolating transformer and the power supply of communication broadband case and electric energy acquisition device and signal port, monitoring camera lightning protection has been exempted to the protection structure of ground connection.
The technical scheme that the utility model adopts 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, in described housing, be provided with lightning protection circuit, housing one end is lightning protection circuit input termination mains supply, and the other end is the protected equipment of output 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), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the first coil (L1), the second coil (L2), common mode choke coil (L3), the first piezo-resistance (M1) is connected in parallel between input, the first coil (L1), the second coil (L2) is connected on respectively input, after the first electric capacity (C1) and the first resistance (R1) series connection, be connected in parallel between the first coil (L1) and the second coil (L2) end, common mode choke coil in parallel (L3) after the first electric capacity (C1) and the first resistance (R1), 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, the impulse withstand voltage level that its impulse withstand voltage level is 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) fuse of connecting respectively.
A kind of protection structure and protection scheme of the power supply of communication broadband case and electric energy acquisition device and signal port, monitoring camera lightning protection being exempted to ground connection described in the utility model; described protection structure is serially connected in and between protected equipment and power supply, forms plate insulation blocking mode for above-mentioned lightning protection being exempted to ground connection isolating transformer; be serially connected between protected equipment and power supply and other inlet wires and protected equipment and form full insulation blocking mode, half insulation blocking mode and full insulation blocking mode are direct serial connection without ground connection.
Compared with prior art, the beneficial effects of the utility model are: can reduce lightning strike probability for protected equipment provides a safety, pure protected mode, more can reduce the error rate of signal transmission.Owing to adopting advanced isolation technology, without structure and the form of any change existing equipment, also without doing earth mat and ground connection, only need time a few minutes 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 has become IT supply power mode; this supply power mode can be guaranteed its electrical safety for broadband access site among a small circle, electric power electric energy acquisition device, monitoring camera; can to power port, protect 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 features such as earth mat are set, efficiently solve the Lightning Protection of broadband access site and electric energy acquisition device, and significantly improved Technological Economy ratio, thoroughly solve and be similar to communication broadband case, electric power electric energy acquisition device, monitoring camera constant power is little, quantity large, the lightning protection under equipment deployment conditions and problem that cannot ground connection.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical solution of the utility model, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is internal circuit diagram of the present utility model;
Fig. 2 is shell figure of the present utility model;
Fig. 3 is communication of the present utility model broadband case half insulation blocking mode figure;
Fig. 4 is the full insulation blocking mode of communication of the present utility model broadband case figure;
Fig. 5 is the utility model lightning protection mode schematic diagram.
Fig. 6 is prior art lightening arresting method schematic diagram.
Embodiment
In order more clearly to understand the technical solution of the utility model, below in conjunction with accompanying drawing, the utility model is further illustrated.
As Fig. 1, described in the utility model 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, in described housing, be provided with isolating transformer and the lightning protection buffer circuit with lightning protection function, housing one end is lightning protection circuit input termination mains supply, and the other end is the protected equipment of output 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), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the first coil (L1), the second coil (L2), common mode choke coil (L3), the first piezo-resistance (M1) is connected in parallel between input, the first coil (L1), the second coil (L2) is connected on respectively input, after the first electric capacity (C1) and the first resistance (R1) series connection, be connected in parallel between the first coil (L1) and the second coil (L2) end, common mode choke coil in parallel (L3) after the first electric capacity (C1) and the first resistance (R1), 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), the first piezo-resistance (M1) and the second piezo-resistance (M2) fuse of connecting 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, select the piezo-resistance that through-current capacity is large to release over the ground, through lightning wave amplitude and the electric current of releasing, be certain to weaken, again by multistage low-pass filter circuit, further lightning wave is carried out to amplitude limit limit frequently, because the inductance in circuit can produce back electromotive force to high frequency lightning wave, be high impedance, can stop the intrusion of lightning wave, can limit sealing in of high-frequency impulse simultaneously, at ordinary times can be to power supply clutter under situation, harmonic wave carries out filtering.After again through the isolation of 1: 1 isolating transformer, can further by shielding separator, can stop the transmission of the noises such as a part of harmonic wave, again reduce to a certain extent the interference of high frequency transient, the voltage of systems stabilisation.
Described in the utility modelly as shown in Figure 3-Figure 5 a kind of the power supply of communication broadband case and electric energy acquisition device and signal port, monitoring camera lightning protection are exempted to the protection structure of ground connection; described protection structure is serially connected in and between protected equipment and power supply, forms plate insulation blocking mode for above-mentioned lightning protection being exempted to ground connection isolating transformer; be serially connected in and between protected equipment and power supply and other inlet wires and protected equipment, form full insulation blocking mode; the lightning-protection method of prior art as shown in Figure 6; need ground connection just to shield, and resistance value be there are certain requirements.
Adopt half insulation blocking mode; the communication broadband case of take is example; 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 guarantees certain dielectric strength around, and optical cable metal strengthening core also adopts insulation joint box and equipment to guarantee 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 been 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 integral body is floating neutral system, power port is also isolated by isolating transformer, although the current potential of entire system has lifting with respect to zero potential, can not produce the potential difference between power supply, ground connection and signal port.In theory, the lightning overvoltage that equipment now can bear is the insulate minimum value of shock-resistant ability of isolating transformer, rack.
And for the potential difference between different netting twines; when thunderbolt, 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, so device damage probability is very low.
Adopt full insulation blocking mode; the communication broadband case of take is example; as shown in Figure 4: the difference of this mode and " half isolation " protected mode is that the outside netting twine of introducing also adopts isolating transformer to isolate; whole system is in a full state of isolating like this; without any cable, be introduced directly in system; due to the state of whole system in full isolation, therefore " half isolation " protected mode is higher for whole coefficient of safety.And now equipment can bear higher lightning overvoltage.In theory, puncture above-mentioned insulation and cause device damage, must at least two places' insulation or isolate corrupt, the lightning overvoltage therefore needing is the two shock-resistant ability sums in place, thus its margin of safety to be compared to half insulation blocking pattern higher.
Half insulation blocking mode and full insulation blocking mode are direct serial connection without ground connection, and identical with broadband case protected mode at electric power electric energy acquisition device, the first-class protected mode of monitoring camera, using method is identical.
The above, it is only preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction, although the utility model discloses as above with preferred embodiment, yet not in order to limit the utility model, any those skilled in the art, do not departing within the scope of technical solutions of the utility model, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solutions of the utility model, any simple modification of above embodiment being done according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (6)
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, in described housing, be provided with lightning protection circuit, housing one end is lightning protection circuit input termination mains supply, and the other end, for the protected equipment of output 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), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the first coil (L1), the second coil (L2), common mode choke coil (L3), the first piezo-resistance (M1) is connected in parallel between input, the first coil (L1), the second coil (L2) is connected on respectively input, after the first electric capacity (C1) and the first resistance (R1) series connection, be connected in parallel between the first coil (L1) and the second coil (L2) end, common mode choke coil in parallel (L3) after the first electric capacity (C1) and the first resistance (R1), 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: the impulse withstand voltage level that its impulse withstand voltage level is between the former limit of lighting protection isolated transformer, secondary and shell is greater than 30kV, 1.2/50us surge voltage ripple, 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) fuse of connecting respectively.
6. one kind the power supply of communication broadband case and electric energy acquisition device and signal port, monitoring camera lightning protection are exempted to the protection structure of ground connection; it is characterized in that: described protection structure is serially connected between protected equipment and power supply and forms plate insulation blocking mode for above-mentioned lightning protection is exempted to ground connection isolating transformer, be serially connected in and between protected equipment and power supply and other inlet wires and protected equipment, form full insulation blocking mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420313258.2U CN203967743U (en) | 2014-06-09 | 2014-06-09 | Ground connection isolating transformer is exempted from a kind of lightning protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420313258.2U CN203967743U (en) | 2014-06-09 | 2014-06-09 | Ground connection isolating transformer is exempted from a kind of lightning protection |
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| CN203967743U true CN203967743U (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420313258.2U Expired - Fee Related CN203967743U (en) | 2014-06-09 | 2014-06-09 | Ground connection isolating transformer is exempted from a kind of lightning protection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162102A (en) * | 2014-06-09 | 2015-12-16 | 山东纵深科技发展有限公司 | 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 |
| CN109193603A (en) * | 2018-10-12 | 2019-01-11 | 柳州辰天科技有限责任公司 | A kind of lightning protection compensator and its monitoring method with monitoring function |
-
2014
- 2014-06-09 CN CN201420313258.2U patent/CN203967743U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162102A (en) * | 2014-06-09 | 2015-12-16 | 山东纵深科技发展有限公司 | 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 |
| CN109193603A (en) * | 2018-10-12 | 2019-01-11 | 柳州辰天科技有限责任公司 | A kind of lightning protection compensator and its monitoring method with monitoring function |
| CN109193603B (en) * | 2018-10-12 | 2023-08-18 | 柳州辰天科技有限责任公司 | Lightning protection compensator with monitoring function and monitoring method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20150609 |
|
| EXPY | Termination of patent right or utility model |