CN101944738A - Lightning protection method by grounding nearest point of signal feeder port - Google Patents
Lightning protection method by grounding nearest point of signal feeder port Download PDFInfo
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- CN101944738A CN101944738A CN2009101517955A CN200910151795A CN101944738A CN 101944738 A CN101944738 A CN 101944738A CN 2009101517955 A CN2009101517955 A CN 2009101517955A CN 200910151795 A CN200910151795 A CN 200910151795A CN 101944738 A CN101944738 A CN 101944738A
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Abstract
The invention relates to a lightning protection method by grounding the nearest point of a signal feeder port, which comprises a nearest grounding point of the signal feeder port, a down lead, an insulating material and a metal grounding plate, wherein one end of the down lead is connected with the nearest grounding point of the signal feeder port, the other end is connected with a grounding body, a housing of a system device is isolated with the ground by using the insulating material, a layer of the metal grounding plate is laid below the insulating material, the metal plate is connected with the grounding body, and the sizes of the metal plate and the insulating material are at least larger than the contactable human-machine distance. The lightning protection method has the benefits of eliminating a bleeder dissipation current channel formed by lightning potential introduced from a power supply and a signal interface through the housing at the lower part of a machine device and the ground, leading the ground potential of the housing at the lower part of the device to suspend by leading the housing at the lower part of the device to be insulated and isolated with the ground, eliminating the probability of leading the external lightning potential to form lightning current and pass through in the system device, leading the place within a certain range below the system device to form the isopotential surface through the metal plate by utilizing the metal plate laid below the insulating plate and further ensuring the personal safety of staff walking on the system device. The method has high protection reliability and maintenance-free property and can simultaneously effectively reduce the mounting cost and the construction cost of the system.
Description
(1) technical field
Patent of the present invention relates to a kind of lightning-protection method that a kind of radio and television transmitting station, communication base station etc. have the system equipment of external power supply and signal feed interface.
(2) background technology
Its rationale of traditional lightning protection measures is " thunder and lightning release opinion ": the thunder and lightning energy is by the lightning protection line the earth of releasing, and earth resistance is more little, and the thunderbolt energy of the earth of releasing is many more, and effect is good more.
The basic safeguard measure of system equipment such as Fig. 1 under this lightning protection theoretical direction show that concrete measure has:
The machine room signal feed installs the ground connection PE3 of SPD and the requirement of good earth resistance additional;
The ground connection PE2 that system equipment lower casing earth point and good earth resistance require;
Power interface installs the ground connection PE1 of SPD and the requirement of good earth resistance additional.
Requirement according to information system rooms lightning protection standard, this power-supply system, the system of equipment own, three grounding system PE1, PE2 of feeder signals output system, PE3, generally all be connected on and carry out the equipotential connection on the ground connection copper bar, be called for short method altogether by down conductor.
In the requirement of concrete lightening protection engineering project, also all be that the numerical value around earth resistance is made an issue of, survey the numerical value of earth resistance earlier, do not reach that the numerical value of regulation requires, carry out ground connection and transform, after the numerical value that reaches regulation required, lightning protection measures was just up to standard.
In fact, effect intrinsic propesties to system's object anatomizes from thunder and lightning, we can see: the thunder and lightning energy by earth connection and the earth form release by way of, the thunder and lightning energy all consume this release by way of on zero potential point before, grounding system resistance (comprising ground resistance) is more little, it is more little to be illustrated in the thunder and lightning energy that consumes in the grounding system, and the thunder and lightning energy that consumes in system equipment is many more, big more to the harmfulness of system equipment.
Consume essential theory according to the thunder and lightning of above-mentioned thunder and lightning consumption before the earth zero potential point, we can find out the technological deficiency of this lightning protection measure of mandatory requirement in the existing codes and standards in this application scenario, as shown in Figure 2:
For the antenna-feedback system of system equipment, thunder and lightning is to the effect electromotive force Ψ 1 of antenna-feedback system, and according to the release consumption principle of high potential to low potential, this thunder and lightning gesture Ψ 1 is by the feeder system of transmitter, can form two release consume by way of:
Form the current sinking i1 that releases by feeder line mouth SPD and ground connection PE3;
Form the current sinking i2 that releases by system equipment itself and ground connection PE2;
For the input power-supply system of system equipment, thunder and lightning is to the effect electromotive force Ψ 2 of power-supply system, and according to the release consumption principle of high potential to low potential, this thunder and lightning gesture Ψ 2 is by the power supply input system, can form two release consume by way of:
Form the current sinking i4 that releases by power port SPD and ground connection PE1;
Form the current sinking i3 that releases by system equipment itself and ground connection PE2;
When casing adopted the casing bottom grounding system PE2 of standard code, release current sinking i2, the i3 that power supply and signal port the are introduced system equipment of flowing through when the electric current of process is big, just might make the electronic device damage of device interior circuit.Particularly the high mountain platform in some strong minefields and sophisticated electronics system are easy to take place the accident of this thunderbolt, and the extent of injury of this accident is directly relevant with grounding system PE2, and PE2 is more little, endangers serious more.
(3) summary of the invention
Technical problem to be solved by this invention is to provide a kind of tram of system equipment thunder proof protection ground point; and the insulation partition method of equipment casing bottom and the earth; with the equipotential metal ground plate safety method that guarantees personal security; this method is simple and reliable; cost is low; the numerical value requirement of no earth resistance is a kind of lightning protection method applied widely.
A kind of signal feed mouth one point earth lightning-protection method comprises feeder line mouth ground connection tie point nearby, or (feeder line mouth signal SPD), down conductor, insulating material, metallic plate.Downlead one end and feeder line mouth earth point nearby are connected, the other end is connected with earth electrode, and all casings of system equipment are all isolated with insulating material with the earth, metallic plate on the insulating material underlay, the size of metallic plate and insulating material are greater than man-machine palp distance at least.
Preferably, earth point is connected on the earth point of signal feed SPD nearby.
Preferably, the power supply input port is adopted simple ground connection SPD and is exempted from ground connection SPD, and metal ground plate can directly replace earth electrode.
Signal feed mouth one point earth guard method advantageous effects of the present invention is:
1, the earth point of system equipment machine bottom, change feed mouth annex ground connection nearby into, or directly carry out one point earth with the earth connection of feed SPD, the system equipment casing is isolated with insulating material and the earth, eliminated the current sinking passage of releasing that signal feed mouth, power port thunder and lightning gesture form by system equipment itself, equipment bottom earth point and the earth, method by the suspension of equipment casing earth potential, blocked outside thunder and lightning gesture and produced the possibility of lightning current, thereby guaranteed the safety of system equipment internal circuit device at device interior.
2, at the bottom of system equipment pad last layer metallic plate, on metallic plate, do insulation and isolate with insulating material and system equipment, under the man-machine situation that may contact, whole people is placed on the equipotential of metal ground plate, thereby guaranteed personnel's safety.
3, utilized the down conductor of system equipment power port SPD and signal feed mouth and earth electrode, metallic plate be connected by way of, outside thunder and lightning gesture by down conductor and earth electrode form release consume by way of, consumed the energy of the outside thunder and lightning of drawing-in system, the earth point at feeder line mouth place is to the safety ground effect of system equipment and to be arranged on the casing bottom identical, has guaranteed man-machine contact occasion personnel's safety.
This method has protection reliability height, transforms easy for installationly, and service time is long, maintenance that need not earth connection, can be in the operating period assurance equipment and personnel's dual safety for a long time.
(4) description of drawings
Fig. 1 is a system equipment standard lightning protection standard schematic diagram.
Fig. 2 is the lightning current schematic diagram that system equipment standard earthing method produces.
Fig. 3 is an embodiment signal feed mouth one point earth method schematic diagram.
Fig. 4 is an embodiment medium wave signal feed mouth one point earth method schematic diagram.
Fig. 5 is an embodiment mobile base station signal feed mouth one point earth method schematic diagram.
(5) embodiment 1
The invention will be further described below in conjunction with embodiment, but protection scope of the present invention is not limited to this.
With reference to Fig. 3, a kind of signal feed mouth one point earth method, comprise feeder line mouth earth point 1 nearby, downlead 2, earth electrode 3, insulating material 4, metallic plate 5, signal feed 6, system equipment 7, ground 8, an end of downlead 2 and medium wave transmitter feed mouth earth point 1 nearby are connected, and downlead 2 other ends are connected with earth electrode 3, system equipment 7 is placed on the insulating material 4, at insulating material 4 underlay last layer metallic plates 5, metallic plate 5 covers on the ground 8, but the size of metallic plate and insulating material is greater than man-machine contact distance at least.It is characterized in that described earth point 1 by downlead 2 and earth electrode 3 system equipment outside form the thunder and lightning gesture release by way of, consume thunder and lightning potential energy.Described system equipment casing and the earth are insulated material 4 isolates, unsettled the earth potential of the casing bottom of system equipment, eliminated outside thunder and lightning gesture system equipment inner form lightning current by way of may.Utilization is layered on the metallic plate under the insulation board, and the place of certain limit forms equipotential plane by metallic plate under the system equipment, thereby guarantees superincumbent personnel's personal safety.
For the feeder line mouth signal SPD protector is installed directly, is directly utilized the down conductor of SPD to carry out one point earth and get final product.
Embodiment 2
With reference to Fig. 4; a kind of medium wave system feed mouth one point earth comprehensive method of protection; what comprise medium wave transmitter antenna iron tower 9 tops draws thunder type prevention eliminating needle; feeder line mouth SPD earth point 1; downlead 2; earth electrode 3; insulating material 4; metallic plate 5; one end of downlead 2 is connected with medium wave transmitter feeder line SPD earth point 1; downlead 2 other ends are connected with metallic plate 5 with earth electrode 3; medium wave transmitter 6 is placed on the insulating material; at insulating material underlay last layer metallic plate 5; but the size of metallic plate and insulating material is greater than man-machine contact distance at least, is preferably in to spread metal material in the whole equipment room earlier, under system equipment and all around; insulating material fills up on the passageway in People's Bank of China; it is characterized in that described earth point 1 by downlead 2 and earth electrode 3 system equipment outside form the thunder and lightning gesture release by way of, consume the thunder and lightning potential energy of introducing from feeder line 7.Described system equipment casing and the earth are insulated material 4 isolates, unsettled the earth potential of transmitter casing bottom, eliminated outside thunder and lightning gesture transmitter inner form lightning current by way of may; Utilization is layered on the metallic plate under the insulation board, and the place of system equipment covered metal plate scope forms equipotential plane by metallic plate, thereby guarantees superincumbent personnel's personal safety.
For the damage to crops caused by thunder that causes from power-supply system; can install a kind of lightning protection for power supply SPD of simple ground connection in the power supply import additional; the indoor design of this lightning protection device is the security reliability of protecting under the imperfect earth situation considering; the reliability of this lightning protection device protection is not subjected to the influence of earth resistance; having changed the conventional power source protector protects reliability to be decided by the technological deficiency of earth resistance; after power port installs simply ground connection additional; power port SPD down conductor can directly be connected on the metallic plate, and the available metal plate substitutes earth electrode.
Because medium wave radiating antenna 9 electrically isolates from the earth, the thunder and lightning energy overwhelming majority of introducing from antenna consumes on the allotting network 8 of medium-wave antenna, for reducing the influence of direct stroke to system equipment, install one at the top of medium-wave antenna and draw thunder type prevention eliminating needle 10, drawing thunder type prevention eliminating needle links to each other with earth electrode with switching device 12 by down conductor 11, thereby under the prerequisite that guarantees the medium wave transmitter operate as normal, reduce the thunder and lightning energy of antenna induction.
By the guard method of above-mentioned aggregate measures, can fundamentally solve the worldwide technological puzzle of medium wave lightning protection.
The invention will be further described below in conjunction with mobile base station embodiment, but protection scope of the present invention is not limited to this.
With reference to Fig. 5; mobile base station system is exempted from the earth electrode guard method; comprise portable antenna emission 8; feeder 3; feeder line SPD earth point 1; downlead 2; base station equipment 6; one end of downlead 2 is connected with base station feed line SPD earth point 1; downlead 2 other ends are connected with metal ground plate 5; transmitter 6 is placed on the insulating material 4, and at insulating material underlay last layer metallic plate, but the size of metallic plate and insulating material is greater than man-machine contact distance at least; be preferably in and spread metal material in the whole equipment room earlier; under system equipment and all around; insulating material fills up on the passageway in People's Bank of China, it is characterized in that described feeder line SPD earth point 1 by downlead 2 and metal ground plate system equipment outside form releasing of thunder and lightning gesture consume by way of, consume thunder and lightning potential energy.Described system equipment casing and the earth are insulated material 4 isolates, unsettled the earth potential of the casing bottom of system equipment, eliminated outside thunder and lightning gesture system equipment inner form lightning current by way of may, utilization is layered on the metallic plate under the insulation board, the place of certain limit forms the equipotential face by metallic plate under the system equipment, thereby guarantees superincumbent personnel's personal safety.
For the damage to crops caused by thunder that causes from power-supply system; can install a kind of lightning protection for power supply of exempting from ground connection additional in the power supply import; the indoor design of this lightning protection device is the security reliability of protecting under the ground connection open circuit situation considering; this protector need not ground connection; the zero line of using electrical network consumes the energy of thunder and lightning, and earth electrode need not be installed.
Direct stroke for antenna system, can on the iron tower of base station, install one and draw thunder type prevention eliminating needle 7, prevention eliminating needle directly utilizes iron tower ground connection, eliminate the harm of direct stroke with prevention eliminating needle, this prevention eliminating needle does not require earth resistance, the ground connection of base station iron tower is not had the requirement of resistance value, just consider the requirement in life-span.
By the base station lightning protection system that such scheme is installed, be that a kind of the need has the protection zero defect with the lightning-protection system of burying special-purpose lightning protection body underground, there are not earth resistance maintenance requirement, the base station system of low construction cost.
Claims (1)
1. signal feed mouth one point earth lightning-protection method nearby; comprise feeder line mouth earth point nearby; down conductor; insulating material; earth electrode; or metal ground plate; it is characterized in that the system equipment bottom enclosure is placed on the insulating material in the described method; one end of down conductor and feeder line mouth earth point nearby are connected; the other end of down conductor and earth electrode; metal ground plate links to each other; the insulating material of the system equipment bottom enclosure in the described method places on the metallic plate, and the scantling of described insulating material and metal ground plate is at least greater than man-machine palp distance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101517955A CN101944738A (en) | 2009-07-10 | 2009-07-10 | Lightning protection method by grounding nearest point of signal feeder port |
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| CN2009101517955A CN101944738A (en) | 2009-07-10 | 2009-07-10 | Lightning protection method by grounding nearest point of signal feeder port |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593811A (en) * | 2012-02-28 | 2012-07-18 | 上海三一科技有限公司 | Lightning-proof protection device of crawler crane and crawler crane with lightning-proof protection device |
| CN102751713A (en) * | 2012-07-20 | 2012-10-24 | 中讯邮电咨询设计院有限公司 | Transient protection system of mobile communication base station based on thunder-and-lightning import port |
| 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 |
| CN103997014A (en) * | 2014-03-11 | 2014-08-20 | 苏宇宁 | Lightning protection technology with weak potential difference connection for transmitter room equipment |
| CN104936409A (en) * | 2015-07-02 | 2015-09-23 | 许继电气股份有限公司 | Push-and-pull module guide rail and module assembly |
| CN107394743A (en) * | 2017-07-29 | 2017-11-24 | 宫兆明 | A kind of anti-lightning strike catch net of Architectural Equipment |
| CN110137935A (en) * | 2019-06-04 | 2019-08-16 | 张安斌 | A kind of power grid lightning protection isolating device |
| CN113541114A (en) * | 2021-06-30 | 2021-10-22 | 国网河南省电力公司电力科学研究院 | Underground barrier-based ground current protection method for buried pipe network |
-
2009
- 2009-07-10 CN CN2009101517955A patent/CN101944738A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593811A (en) * | 2012-02-28 | 2012-07-18 | 上海三一科技有限公司 | Lightning-proof protection device of crawler crane and crawler crane with lightning-proof protection device |
| CN102751713A (en) * | 2012-07-20 | 2012-10-24 | 中讯邮电咨询设计院有限公司 | Transient protection system of mobile communication base station based on thunder-and-lightning import port |
| 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 |
| CN103997014A (en) * | 2014-03-11 | 2014-08-20 | 苏宇宁 | Lightning protection technology with weak potential difference connection for transmitter room equipment |
| CN103997014B (en) * | 2014-03-11 | 2017-11-28 | 苏宇宁 | Transmitter room equipment light current potential difference connects lightening arresting method |
| CN104936409A (en) * | 2015-07-02 | 2015-09-23 | 许继电气股份有限公司 | Push-and-pull module guide rail and module assembly |
| CN107394743A (en) * | 2017-07-29 | 2017-11-24 | 宫兆明 | A kind of anti-lightning strike catch net of Architectural Equipment |
| CN110137935A (en) * | 2019-06-04 | 2019-08-16 | 张安斌 | A kind of power grid lightning protection isolating device |
| CN113541114A (en) * | 2021-06-30 | 2021-10-22 | 国网河南省电力公司电力科学研究院 | Underground barrier-based ground current protection method for buried pipe network |
| CN113541114B (en) * | 2021-06-30 | 2023-03-07 | 国网河南省电力公司电力科学研究院 | Underground barrier-based ground current protection method for buried pipe network |
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Application publication date: 20110112 |