CN205304237U - Earth potential counterattack protection grounding box - Google Patents
Earth potential counterattack protection grounding box Download PDFInfo
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- CN205304237U CN205304237U CN201521137072.7U CN201521137072U CN205304237U CN 205304237 U CN205304237 U CN 205304237U CN 201521137072 U CN201521137072 U CN 201521137072U CN 205304237 U CN205304237 U CN 205304237U
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Abstract
The utility model relates to a response thunder protection earthing device among the low voltage distribution system relates to an earth potential counterattack protection grounding box, arrange and combination ground connection row including work protective earthing row, SPD surge protector ground connection, it is used for the earth potential of filtering lightning current and EMC electromagnetic interference signal to strike back the inhibitor between arranging with surge protector ground connection still to connect to arrange at work protective earthing including the electricity, still arrange and unite the wave form, polarity, peak value, number of times, the time isoparametric that are used for take notes lightning current of ground connection between arranging surge protector ground connection including connecting, or the built -in monitoring module who is struck by lightning the number of times counter. So, equipment is scurried into through the earth connection to the earth mat produced when earth potential counterattack inhibitor can stop the thunder and lightning to flow into ground counterattack voltage, and both protective apparatus exempted from earthy counterattack harm, and the noncongestion of retaining device's EMC electromagnetic interference ground connection again can also write down the lightning current through the release parameter on ground of lightning protection device (SPD).
Description
Technical field
This utility model relates to the induced lightening protection grounding device in low-voltage distribution system, is specifically related to a kind of earth potential counterattack protection grounding box.
Background technology
Lightning current is to be connected to earth mat by down conductor release into ground; according to the Lightning Protection Standards of Buildings related request to ground connection; all earth leads must carry out equipotential link, and namely direct lightning strike earthing bar, induced lightening earthing bar, work/protective grounding row are all connected with earth mat. But in application for many years, expose some serious problems.
Owing to surface soil resistivity everywhere is different, simultaneously because the construction technology design of earth mat, the use problem such as material, construction cost, the grounding resistance of earth mat can not accomplish absolute zero ohm, and downlead and earth mat line itself have higher contact resistance and induction reactance, when stronger lightning current by down conductor be released to earth mat enter ground time, the current potential entering place can raise moment, causes the current potential of whole earth mat to raise.
Further, when lightning current enters ground by down conductor and earth mat, the earth potential moment of grounding device impedance raises, and namely earth potential counterattack, belongs to the quadratic effect of thunder and lightning. The earth potential that lightning current is produced by downlead and earth mat, the earth wire bank of equipment it is carried in by the earth lead of equipment, the earth potential pressure drop causing the earth wire bank of equipment reaches as high as (or line) voltage over the ground of volt up to ten thousand, thus by device damage, and discharge breakdown can be there is, cause that equipment is badly damaged, even personal safety. This deal with earthy counterattack improperly due to grounding technology, cause whole network system equipment all to smash.
Earth potential transient state high potential not only endangers the equipment in this building, goes back entail dangers to the equipment in adjacent buildings. Although the equipment in this adjacent buildings does not suffer direct stroke, but after nearby building is struck by lightning, circuit will be strikeed back in the equipment ground system reached along underground piping in adjacent buildings by transient state high potential so that the equipment being connected with these circuits is subject to the infringement of transient state high potential.Earth potential counterattack can generate the counterattack voltage of a few kV to tens kV to hundreds of kV; this counterattack can along the zero line of power system; protective grounding line and various forms of earth lead, arrive bigger indoor range with the incoming indoor of the form of ripple or propagation, cause large-area harm.
In sum, when strong lightning current, current earth mat occurs that earth potential is strikeed back, it is easy to cause the damage of electric equipment, entail dangers to personal safety time serious.
Therefore, a kind of technology is needed badly, it is possible to suppress earth potential counterattack, the safety of protection equipment and the person.
Summary of the invention
The purpose of this utility model is in that: occur, for current earth mat, the problem that earth potential is strikeed back when strong lightning current, it is provided that can suppress a kind of earth potential counterattack protection grounding box of lightning current counterattack voltage.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of earth potential counterattack protection grounding box; including work protective grounding row and surge protector (SPD) earthing bar; the earth potential for filtering lightning current also including being connected electrically between described work protective grounding row and surge protector earthing bar strikes back suppressor; so; the counterattack voltage that when earth potential counterattack suppressor can stop thunder and lightning to flow into ground, earth mat produces scurries into equipment by earth lead, thus protecting equipment to exempt from earthy counterattack harm.
Therefore; in this programme; the counterattack electric current of thunder and lightning potential counterattack suppressor impenetrably is transferred to electric equipment end; that is; the counterattack electric current of thunder and lightning is strikeed back suppressor place at earth potential and is blocked; so, it is possible effectively to protect electric equipment, allow electric equipment strike back the damage of electric current from high pressure earth potential.
As preferably; described earth potential counterattack suppressor includes EMC grounded circuit and the work protective grounding path of parallel connection; current signal can be carried out high-pass filtering process by EMC grounded circuit; current signal can be carried out low-pass filtering treatment by work protective grounding path; so; the counterattack voltage that when earth potential counterattack suppressor can stop thunder and lightning to flow into ground, earth mat produces scurries into equipment by earth lead, thus protecting equipment to exempt from earthy counterattack harm.
As preferably, described EMC grounded circuit includes high pass filter, so, it is possible to carry out high-pass filtering process by high pass filter, it is possible to prevent low-frequency current from passing through high pass filter place circuit.
As preferably, described work protective grounding path includes low pass filter, so, it is possible to carry out low-pass filtering treatment by low pass filter, it is possible to prevent high-frequency current from passing through low pass filter place circuit.
As preferably; described earth potential counterattack protection grounding box also includes joint grounding row; also include the monitoring modular for monitoring lightning current being connected electrically between described surge protector earthing bar and described joint grounding row; described monitoring modular can monitor the relevant parameter of the lightning currents such as the waveform of lightning current, polarity, peak value, number of lightning strokes, thunderbolt time in real time; further, it is possible to data are stored or transmit to other equipment.
As preferably, described monitoring modular includes the thunder-and-lightning counter for monitoring number of lightning strokes, so, it is possible monitoring number of lightning strokes.
As preferably, described monitoring modular includes the lightening pulse sensor for monitoring lightening pulse, and especially, described lightening pulse sensor can be current sensor, so, it is possible to monitor the lightening pulse parameters such as the waveform of lightning current, polarity, peak value or thunderbolt time in real time.
As preferably, described earth potential counterattack protection grounding box includes potential counterattack suppressor described at least two, connects between described potential counterattack suppressor, so, it is possible to make earth potential counterattack protection grounding box work more safe and reliable.
As preferably, described potential counterattack suppressor includes EMC grounded circuit described at least two, connects between described EMC grounded circuit, so, it is possible to make earth potential counterattack protection grounding box work more safe and reliable.
As preferably, described potential counterattack suppressor includes the protective grounding path that works described at least two, connects between described work protective grounding path, so, it is possible to make earth potential counterattack protection grounding box work more safe and reliable.
In sum, this utility model compared with prior art, has beneficial effect:
1, the decay of electric current that potential counterattack suppressor acts on from work protective grounding row is very little, it is possible to keep the properly functioning required working earthing of equipment, equipment (shell) safety ground unimpeded;
2, to act on the decay of EMC electromagnetic interference signal very little for potential counterattack suppressor, it is possible to keeps the unimpeded of the properly functioning required EMC electromagnetic interference signal ground connection of equipment;
3, potential counterattack suppressor is strong to lightning current attenuation, it is possible to the counterattack voltage that when stoping thunder and lightning to flow into ground, earth mat produces scurries into equipment by earth lead, thus protecting equipment to exempt from earthy counterattack harm.
Accompanying drawing explanation
Fig. 1 is the connection diagram of the application;
Fig. 2 is the application earth potential suppressor operating diagram;
Fig. 3 is the operating diagram that the application monitors lightning current;
Labelling in figure: 1-casing; 2-work protective grounding row, 3-earth potential counterattack suppressor, 31-EMC grounded circuit; 32-works protective grounding path; 4-surge protector (SPD) earthing bar, 5-monitoring modular, 6-joint grounding is arranged; 7-multifunctional comprehensive thunder and lightning detector; 8-lightning protection line, 9-works protective grounding line, 10-earth mat.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, this utility model is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain this utility model, be not used to limit this utility model.
As it is shown in figure 1, the earth potential counterattack protection grounding box 1 of this enforcement, including casing 1, surge protector (SPD) earthing bar 4, work protective grounding row 2, joint grounding row 6, earth potential counterattack suppressor 3, monitoring modular 5. Earth potential counterattack suppressor 3 includes the EMC grounded circuit 31 of parallel connection and includes high pass filter with work protective grounding path 32, EMC grounded circuit 31, and work protective grounding path 32 includes low pass filter. Work protective grounding row 2 is connected with SPD earthing bar 4 by earth potential counterattack suppressor 3; Described SPD earthing bar 4 is connected with monitoring modular 5, and monitoring modular is arranged 6 with joint grounding and is connected, and monitoring modular 5 includes lightening pulse sensor or thunder-and-lightning counter.
The operation principle of earth potential counterattack grounding box is:
As it is shown on figure 3, in machine room the work of various communication equipments connect protective grounding line 9 collect in work protective grounding row 2. Zero-potential point needed for equipment and the EMC electromagnetic interference signal of generation, strikeed back the internal EMC grounded circuit of suppressor 3 31 and work protective grounding path 32, enter earth mat 10 after SPD earthing bar 4 arranges 6 with joint grounding by earth potential. Earth potential counterattack suppressor 3 acts on from the electric current of work protective grounding row 2 or decay during EMC electromagnetic interference signal very little, it is ensured that equipment work protective grounding and EMC disturb signal ground loop unimpeded.
When lightning current enters ground by downlead inflow earth mat 10; the earth potential counterattack high pressure produced is when earth potential strikes back suppressor 3 inside; owing to the frequency of lightening pulse is higher; lightning current is strikeed back high pressure and is significantly decayed by the low pass filter arranged in the high pass filter arranged in EMC grounded circuit (31) and work protective grounding path 32; thus stoping the potential counterattack high pressure of ground lightning current to scurry into equipment by earth lead, protection equipment exempts from earthy counterattack harm.
As shown in Figure 2, the lightning protection line 8 installed in machine room collects in surge protector earthing bar 4, and surge protector earthing bar 4 connects monitoring modular 5, and monitoring modular 5 is arranged 6 with joint grounding again and is connected. When lightning current is released to ground by lightning protection line 8, the lightening pulse sensor arranged in monitoring modular 5 is by the pulse signal acquisition detected and transmits to multifunctional comprehensive lightning monitoring instrument 7, for recording the parameters such as the waveform of each induced lightening electric current, polarity, peak value, number of lightning strokes, thunderbolt time, and parameter stored or uploads, or the thunder-and-lightning counter directly accumulative number of lightning strokes by arranging in monitoring modular 5.
All any amendment, equivalent replacement and improvement etc. made within spirit of the present utility model and principle, should be included within protection domain of the present utility model.
Claims (7)
1. an earth potential counterattack protection grounding box; (2), surge protector (SPD) earthing bar (4) is arranged including work protective grounding, it is characterised in that: also include earth potential counterattack suppressor (3) for filtering lightning current being connected electrically between described work protective grounding row (2) and surge protector earthing bar (4).
2. earth potential according to claim 1 counterattack protection grounding box; it is characterized in that: described earth potential counterattack suppressor (3) includes EMC grounded circuit (31) and work protective grounding path (32) of parallel connection; described EMC grounded circuit (31) for carrying out high-pass filtering process to current signal, and described work protective grounding path (32) is for carrying out low-pass filtering treatment to current signal.
3. earth potential according to claim 2 counterattack protection grounding box, it is characterised in that: described EMC grounded circuit (31) includes high pass filter.
4. earth potential according to claim 2 counterattack protection grounding box, it is characterised in that: described work protective grounding path (32) includes low pass filter.
5. earth potential according to claim 1 counterattack protection grounding box; it is characterized in that: also include joint grounding row (6), also include the monitoring modular (5) for monitoring lightning current being connected electrically between described surge protector earthing bar (4) and described joint grounding row (6).
6. earth potential according to claim 5 counterattack protection grounding box, it is characterised in that: described monitoring modular (5) includes the thunder-and-lightning counter for monitoring number of lightning strokes.
7. earth potential according to claim 5 counterattack protection grounding box, it is characterised in that: described monitoring modular (5) includes the lightening pulse sensor for monitoring lightening pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521137072.7U CN205304237U (en) | 2015-12-30 | 2015-12-30 | Earth potential counterattack protection grounding box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521137072.7U CN205304237U (en) | 2015-12-30 | 2015-12-30 | Earth potential counterattack protection grounding box |
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| CN205304237U true CN205304237U (en) | 2016-06-08 |
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| CN201521137072.7U Active CN205304237U (en) | 2015-12-30 | 2015-12-30 | Earth potential counterattack protection grounding box |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171188A (en) * | 2017-05-16 | 2017-09-15 | 北京航天发射技术研究所 | A kind of lightning protection system of large-scale activity flat pad |
| CN113555861A (en) * | 2021-06-17 | 2021-10-26 | 中铁第四勘察设计院集团有限公司 | Lightning protection distribution box for railway communication machine room |
| CN114002548A (en) * | 2021-10-29 | 2022-02-01 | 沈阳铁路信号有限责任公司 | Lightning protection monitoring method and system with evaluation function |
-
2015
- 2015-12-30 CN CN201521137072.7U patent/CN205304237U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171188A (en) * | 2017-05-16 | 2017-09-15 | 北京航天发射技术研究所 | A kind of lightning protection system of large-scale activity flat pad |
| CN107171188B (en) * | 2017-05-16 | 2019-01-25 | 北京航天发射技术研究所 | A kind of lightning protection system of large-scale activity flat pad |
| CN113555861A (en) * | 2021-06-17 | 2021-10-26 | 中铁第四勘察设计院集团有限公司 | Lightning protection distribution box for railway communication machine room |
| CN113555861B (en) * | 2021-06-17 | 2023-01-24 | 中铁第四勘察设计院集团有限公司 | Lightning protection distribution box for railway communication machine room |
| CN114002548A (en) * | 2021-10-29 | 2022-02-01 | 沈阳铁路信号有限责任公司 | Lightning protection monitoring method and system with evaluation function |
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