CN101133538A - Lightning current conduction device - Google Patents
Lightning current conduction device Download PDFInfo
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- CN101133538A CN101133538A CNA2005800487793A CN200580048779A CN101133538A CN 101133538 A CN101133538 A CN 101133538A CN A2005800487793 A CNA2005800487793 A CN A2005800487793A CN 200580048779 A CN200580048779 A CN 200580048779A CN 101133538 A CN101133538 A CN 101133538A
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- lightning
- envelope curve
- harvester
- current conducting
- electric conductor
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Abstract
The invention relates to a lightning current conducting device for electrically connecting a collecting device to an earthing device in an external lightning conductor, wherein an electrical conductor is embedded in an insulated covered wire which also has a layered dielectric. The insulation covering is provided with a conductive or semiconductive coating, and a structure for electric field regulation is arranged in a connecting part of the electric conductor and the acquisition device so as to avoid surface discharge and improve impulse voltage tolerance. The sheath may be divided over its length into sections of different conductivity.
Description
The present invention relates to a kind of according to claim 1, the lightning-current conducting device of 2,4,5 or 6 preamble, it is electrically connected harvester with earthing device in the outside lightning rod.
Lightning-current conducting device is made of the plain conductor that has respective cross section usually, to guarantee desirable lightning current tolerance.Common material is aluminium, zinc-coated wire or steel band, also can be copper conductor.They are attached on nature or the artificial harvester, are directed to earthing device by the shortest path on the external surface of buildings, as annular or bar-shaped ground wire, perhaps are connected with basic wiring formation.
Observe relevant lightning rod standard and different concrete measures thereof and obtained the very high job security of degree for the equipment that needs protection.Correspondingly determined that the needed lightning rod grade of lightning rod is the clearly regulation for the structural measure that realizes outside lightning rod.
A problem that often occurs is to note necessary security distance between the lead of harvester and other conductiving metal part that is connected Electrical and Electronic equipment in practice.If can not guarantee necessary minimum range here, then when taking place, thunder and lightning may have the danger of uncontrollable flashing over of spark, consequently cause device damage or possibility breaking out of fire.
Safe distance calculating will be by the component K of lightning current in lead
c, the rate of change K of lightning current
1, the spacing L on next plane of compensation and the material K of external series gap from the points of proximity to the electromotive force
mDetermine.
Material coefficient K
mThe insulation property of certain material with respect to air have been described.
Above-mentioned near can be by solving at present on the problem principle for uninsulated lightning-current conducting device with the insulating barrier parcel, and this problem is owing to insulated conductor becomes difficult from passing through on arrester device.Be imported into the position of lead at lightning current, surface discharge can occur along the surface.In case surpassed the starting voltage of surface discharge, stable discharge will appear, and this can reduce the proof voltage ability on the whole, and causes arcing, makes insulation ineffective.
For fear of the slip arcing, the high pressure resistant coaxial cable of known shielding has the adjustable tag of resistance, and can be used for lightning rod.
The problem of this lightning-current conducting device is, under specific circumstances, the transformer input coupling of the lightning current that undesirable primary side will conduct can occur by the good shielded conductor of conductivity in shielded conductor.
Because the shielded conductor of conduction hardware system common and building links together, institute is so that this problem is more serious.Under the situation of value less than the very little loop resistance of 1 Ω, very big electric current can appear, and what it may account for lightning current that primary side will conduct reaches 50%.This effect has caused very big threat for the Electrical and Electronic equipment and the device that are installed in the building.This threat can only be avoided by shielding of a high price, perhaps avoids by the big spacing that is difficult to realize between insulated electric conductor and all the other hardwares.
Disclose a kind of lightning-current conducting device by DE 10228665 A1, be used for the electrical connection between the grounding apparatus of harvester and outside lightning rod.Here the electric conductor that is adopted is embedded in the insulation envelope curve, the insulation envelope curve has the foreskin of conduction again, wherein be provided with the structure that is used for electric field adjusting, to prevent surface discharge and to reach required pulse voltage tolerance in the connecting portion office of electric conductor and harvester.But need be in the zone of metal parts, for example metal protection layer or metal tube etc. in the conduction device of this coaxial configuration the specific minimum spacing of maintenance, this not only had shortcoming in configuration aspects but also at the design aspect of specific building.
German utility model DE 202004003233 U1 show a kind of arrester device that is used to have the outside lightning rod system of insulated conductive device, wherein in order to prolong the thunder and lightning conduction device, corresponding to length necessary under each applicable cases, can be in the infield on electric conductor the built-in electrical insulation envelope curve of mobile arbitrary number.In the zone of joint, the built-in electrical insulation envelope curve is wrapped up by the exterior insulation line, wherein must keep basically one for example and the what is called between the mobile wireless mast isolate spacing.
Set out according to above-mentioned content, task of the present invention is to provide a kind of lightning-current conducting device of further exploitation, it gets back to the electric conductor that is embedded in the insulation envelope curve, described insulation envelope curve has the crust of conduction again, guaranteed that the transformer input coupling of lightning current in shielded conductor that will conduct on the one hand is reduced to the acceptable degree, material uses and the thickness of conduction device thereby can reduce, and can not reduce the electrical protection performance, and given thunder and lightning conduction device can be passed through or be arranged near the hardware, and unlike prior art, need minimum isolation spacing.
The solution of this task of the present invention be by a kind of according to claim 1, the lightning-current conducting device of 2,4,5 or 6 feature realizes, wherein dependent claims comprises the embodiment that meets purpose at least and further improves.
Then, according to first kind of execution mode, the electric conductor of this lightning-current conducting device is embedded in the insulation envelope curve.For example the insulating material that adopts here is polyvinyl chloride or polyethylene.
This insulation envelope curve also have one semiconductive, have a foreskin of classification conductivity in the longitudinal direction.The connecting portion office of the harvester of realizing in electric conductor and available conventional method is provided with the structure that is used for electric field adjusting, for example adopts the form of the working of plastics of conduction, to prevent surface discharge.
Electric field adjusting itself is capacitive, or realizes as ohm electric field adjusting of cable termination.For example the electric field adjusting electrode can be arranged on cable termination, and these electrodes are for example realized with the form of the semiconductor tape of reeling.
The set outer protection layer of specific conduction device has siliceous or other waterproof materials, and this has further improved arcing tolerance performance.
Meaning of the present invention also is, in order to improve arcing tolerance performance shielding can be set, and it has prolonged leakage path.
Insulation envelope curve described above can directly arrive lightning-arrest shank or constitute the part of lightning-arrest shank.
The described design concept that has the insulation envelope curve of the structure that is used for electric field adjusting also can be applied to supply, the blowdown technique device of conduction type, and for example water pipe, gas pipeline or rainwater are gathered pipeline.
In lightning rod equipment, can combine with the lightning-current conducting device of routine with according to conduction device insulation of the present invention and that be provided with the electric field adjusting structure or the cable of this class formation.
Electric field adjusting also can be used in combination and separate in the field of this class coupling system, with the corresponding tolerance of guaranteeing to insulate to surface discharge.
Just as has been described; this new lightning-current conducting device is made of a coaxial configuration; this coaxial configuration comprises an inner wire that can carry lightning current, a corresponding insulation layer, and one to the sheath of resistance-variable under the stable condition and the mechanical protection cover of an outside.For fear of surface discharge, also the joint at cable carries out potential regulating, i.e. Jue Yuan lead-in wire, and conventional lightning rod equipment.
Owing to respect to high frequency cable, need not to consider tolerance, can be optimized electric field adjusting by simple method aspect the tolerance of pulse voltage to alternating voltage.Therefore there is such possibility, promptly can realizes higher relatively electric conductivity value, to allow simple and to save ground, space and realize.
Constructed electrode in order to carry out electric field adjusting, wherein both can also can use liquid as regulating medium with semiconductive material.
When adopting the semiconductor tape that can wind up in order to carry out electric field adjusting, the geometry of zone employing according to the high Paderewski in Lip river (Rogowski) profile type can introduced.
According to second kind of execution mode of the present invention, the insulation envelope curve is made of the dielectric of the layering that has partial insulative layer or SI semi-insulation zone and the material of band differing dielectric constant.
Corresponding DIELECTRIC CONSTANT
rChoose like this: make it and the high field intensity approximately equal that in SI semi-insulation r, occurs.
If realize insulator pin according to second kind of execution mode according to the present invention, and to have adopted radius be r
2And r
3The dielectric of layering, it is wrapped in radius is r
1The enough big metallic conductor of cross section, then can reduce the thickness that required material used and reduced insulator pin, and the electrical protection performance can improve greatly.
When as previously described in the high field intensity approximately equal that SI semi-insulation occurs, can improve the electrical protection performance and can utilize the insulating material that is adopted better.Here as described, used to have differing dielectric constant ε
rInsulating material.
According to the third execution mode of the present invention, the foreskin of coaxial lightning-current conducting device so realizes, makes the resistance value of foreskin be in 1k Ω/m to the scope of＜100k Ω/m.This little foreskin resistance has obtained following advantage.
The foreskin resistance that reduces can make that the voltage on conductive line surfaces is evenly distributed in the terminal fitting zone under the situation of thunderbolt.Will surfacewise, especially in the zone of earth point, obtain littler field intensity like this, in any case this field intensity all is lower than the required field intensity of discharge.Thereby improved the whole resistance to pressure of this configuration greatly.
Such low-resistance electric field adjusting distributes near the linear voltage between perfect condition bottom flange and the earth point.
Selected 1k Ω/m is still very high to the operating resistance in＜100k Ω/m scope, make that the leakage current on the cable envelope curve is little of ignoring, and guaranteed the effect of coaxial lightning-current conducting device, as the conductive equipment safety in lightning rod and the building is isolated.
According to the 4th kind of execution mode of the present invention, the envelope curve of lightning-current conducting device has the quick resistance of integrated minute-pressure, makes lightning-current conducting device have piezo resistance effect on its length.Also having improved especially thus, the electric field adjusting in the tie point zone concerns.
According to the present invention; also used the electric conductor that is embedded in the insulation envelope curve to be used as lightning-current conducting device; be used for harvester is electrically connected with the grounding apparatus of outside lightning rod; described insulation envelope curve also has conduction or semiconductive foreskin; wherein be provided with the structure that is used for electric field adjusting in the junction of electric conductor and harvester; to avoid surface discharge and to improve pulse voltage tolerance performance; wherein this lightning-current conducting device can be provided with at an easy rate, and need not to keep isolating spacing with claimed object.
To the present invention be described in more detail by an embodiment and by means of accompanying drawing.
Profile that passes the part of lightning current transmitter of Fig. 1;
Fig. 2 is as the detailed maps of the field control device of the adapter that is made of conductive plastics;
Fig. 3 passes one according to the profile that has the part of the dielectric coaxial lightning-current conducting device of layering of the present invention;
A kind of execution mode of Fig. 4 lightning-current conducting device arranged according to the present invention (HVI) does not have spacing with claimed object.
According to Fig. 1, be provided with a metal terminal 3 in the end that connects a side, it contacts with conductor 5.The structure that is used for electric field adjusting that in the transitional region of the end of insulator 1 and metal terminal 3, has that constitute by conductive plastics, adapter 2 forms.
According to present embodiment, shielded conductor typically has the resistance of 10k Ω/m towards the L1 of first of high-voltage potential.
The partial L 2 of shielded conductor back has best resistance value less than 10k Ω/m.
Preferably can use conductive plastics in the resistance range of mentioning or semiconductive material as shielded conductor 4 that is adopted and 6 material.
According to Fig. 2 as the conductive plastics element 2 of adapter on the metal connecting terminal 3, produced the coupling needed, that partial discharge is not enough on the shielded conductor 4 in the respective end of lightning-current conducting device simultaneously.
Back to high-voltage potential one side or coaxial cable end, inner wire 5 is connected with grounding system by the metal Connection Element.Equally, shielded conductor 6 (not shown) that also here is connected with grounding system.In order to contact with the both sides of coaxial cable, so design the size of employed Connection Element 3, make the lightning current that is occurred can both have no jeopardously to be conducted.
Schematic diagram according to Fig. 3 has illustrated the section that passes coaxial lightning-current conducting device, its have one be positioned at core, radius is r
1Metallic conductor.
This radius is r
1Metallic conductor be respectively r by radius
2And r
3The dielectric of layering wrap up.This is configured in outermost and also has a semiconductive sheath 7.
When the high field intensity that occurs in the various piece insulator is all roughly the same, can improve the electrical protection ability, thereby guarantee desirable, to the better utilization of the insulating material that adopted in the layering dielectric.Used for this reason and had differing dielectric constant ε
rInsulating material.This is had approx:
r
2·εr
2?≈r
3·εr
3…≈r
n·εr
n
As according to can seeing in the schematic diagram of Fig. 4, the coaxial lightning-current conducting device HVI of insulation also is provided with to such an extent that lean on very closely with the metal outer lining 8 of hardware, for example building as far as possible.In the key area of the metal outer lining 8 that links to each other with ground, common required isolation interval S
1May diminish to and ignore, thereby obtained especially very conservative, the not too noticeable plan of establishment from the outward appearance angle.
As shown in Figure 4, the envelope curve of the semiconductive of lightning-current conducting device HVI or conduction and building earthing device link together.By the configuration of the field control in the calmodulin binding domain CaM of lightning-current conducting device HVI and bare conductor 9, avoided surface discharge reliably, consequently obtained a lightning-current conducting device very reliably.
Reference numerals list:
1 insulator
2 adapters that consisted of by conductive plastics
3 metal terminals
4,6 shielded conductors
5 metal inner wires
7 semiconductive sheaths
The metal outer lining of 8 buildings, for example Attica
9 bare conductors
The HVI lightning-current conducting device
Claims (10)
1. lightning-current conducting device, be used for harvester is electrically connected with the grounding apparatus of outside lightning rod, wherein electric conductor is embedded in the insulation envelope curve, described insulation envelope curve has the foreskin of a conduction again, and in the coupling part of electric conductor and harvester, be provided with the structure that is used for electric field adjusting, to avoid surface discharge and to improve the pulse voltage tolerance, it is characterized in that
Described foreskin is made of semiconductive material, and has the part that distinguishes, conductivity is different on its length.
2. lightning-current conducting device, be used for harvester is electrically connected with the grounding apparatus of outside lightning rod, wherein electric conductor is embedded in the insulation envelope curve, described insulation envelope curve has the foreskin of a conduction again, and in the coupling part of electric conductor and harvester, be provided with the structure that is used for electric field adjusting, to avoid surface discharge and to improve the pulse voltage tolerance, it is characterized in that
Described insulation envelope curve is made of the dielectric of layering, and described dielectric has SI semi-insulation section or the SI semi-insulation zone that is made of the different material of dielectric constant.
3. according to the lightning-current conducting device of claim 2, it is characterized in that,
Corresponding DIELECTRIC CONSTANT r is so selected, and making wherein has the high field intensity approximately equal that occurs in SI semi-insulation body r
r
2·εr
2≈r
3·εr
3…≈r
n·εr
n。
4. lightning-current conducting device, be used for harvester is electrically connected with the grounding apparatus of outside lightning rod, wherein electric conductor is embedded in the insulation envelope curve, described insulation envelope curve has the foreskin of a conduction again, and in the coupling part of electric conductor and harvester, be provided with the structure that is used for electric field adjusting, to avoid surface discharge and to improve the pulse voltage tolerance, it is characterized in that
The resistance value of described foreskin is in 1k Ω/m to the scope of＜10k Ω/m.
5. lightning-current conducting device, be used for harvester is electrically connected with the grounding apparatus of outside lightning rod, wherein electric conductor is embedded in the insulation envelope curve, described insulation envelope curve has the foreskin of a conduction again, and in the coupling part of electric conductor and harvester, be provided with the structure that is used for electric field adjusting, to avoid surface discharge and to improve the pulse voltage tolerance, it is characterized in that
Described foreskin is made of semiconductive material, and described semiconductive material has the quick resistance of integrated minute-pressure.
6. lightning-current conducting device, be used for harvester is electrically connected with the grounding apparatus of outside lightning rod, wherein electric conductor is embedded in the insulation envelope curve, described insulation envelope curve has the foreskin of a conduction again, and in the coupling part of electric conductor and harvester, be provided with the structure that is used for electric field adjusting, to avoid surface discharge and to improve the pulse voltage tolerance, it is characterized in that
Claim 1,2,3,4 and/or the combination of 5 described features.
7. according to the lightning-current conducting device of claim 1, it is characterized in that,
Conductivity towards the part of high-voltage potential is successively decreased step by step or continuously towards earth terminal.
8. according to the lightning-current conducting device of claim 1 or 7, it is characterized in that,
The first towards high-voltage potential of conduction foreskin has the resistance that is essentially 1k Ω/m, and the part of back has and is preferably in 1k Ω/m to the resistance value that changes between 10k Ω/m.
9. according to the lightning-current conducting device of one of aforesaid right requirement, it is characterized in that,
For with the coupling of the coupling part of electric conductor and insulation envelope curve partial discharge deficiency, used the plastic components that is preferably conduction as adapter.
10. one of aforesaid right is required described electric conductor with the lightning-current conducting device that is electrically connected between the grounding apparatus that acts on harvester and outside lightning rod; described electric conductor is embedded in the insulation envelope curve; described insulation envelope curve has the foreskin of a conduction again; wherein in the coupling part of electric conductor and harvester, be provided with the structure that is used for electric field adjusting; avoiding surface discharge and to improve the pulse voltage tolerance, wherein lightning-current conducting device and claimed object do not have the compartment of terrain and are set up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005800487793A CN101133538A (en) | 2005-03-22 | 2005-03-22 | Lightning current conduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005800487793A CN101133538A (en) | 2005-03-22 | 2005-03-22 | Lightning current conduction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101133538A true CN101133538A (en) | 2008-02-27 |
Family
ID=39129889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005800487793A Pending CN101133538A (en) | 2005-03-22 | 2005-03-22 | Lightning current conduction device |
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| CN (1) | CN101133538A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104756337A (en) * | 2012-10-26 | 2015-07-01 | 德恩及索恩两合股份有限公司 | Lightning protection device with insulated lead |
| CN104769798A (en) * | 2012-10-26 | 2015-07-08 | 德恩及索恩两合股份有限公司 | Device for contacting a field control layer of an insulated lead in an external lightning strike protector |
| CN107771020A (en) * | 2016-08-18 | 2018-03-06 | 空中客车运营有限责任公司 | Segmented lightning diverter element with integrated ESD protections |
| CN111357161A (en) * | 2017-09-19 | 2020-06-30 | 德恩塞两合公司 | Inhibiting loop current in conductive structures of buildings |
| CN112727711A (en) * | 2021-01-04 | 2021-04-30 | 株洲时代新材料科技股份有限公司 | Lightning protection device for wind driven generator blade |
| US11251595B2 (en) | 2018-07-03 | 2022-02-15 | Erico International Corporation | Lightning protection system and method |
-
2005
- 2005-03-22 CN CNA2005800487793A patent/CN101133538A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104756337A (en) * | 2012-10-26 | 2015-07-01 | 德恩及索恩两合股份有限公司 | Lightning protection device with insulated lead |
| CN104769798A (en) * | 2012-10-26 | 2015-07-08 | 德恩及索恩两合股份有限公司 | Device for contacting a field control layer of an insulated lead in an external lightning strike protector |
| CN104769798B (en) * | 2012-10-26 | 2017-08-18 | 德恩及索恩两合股份有限公司 | Device for contacting a field control layer of an insulated lead in an external lightning strike protector |
| CN104756337B (en) * | 2012-10-26 | 2018-05-01 | 德恩及索恩两合股份有限公司 | Lightning protection device with insulated lead |
| CN107771020A (en) * | 2016-08-18 | 2018-03-06 | 空中客车运营有限责任公司 | Segmented lightning diverter element with integrated ESD protections |
| CN107771020B (en) * | 2016-08-18 | 2020-10-09 | 空中客车运营有限责任公司 | Segmented lightning shunt element with integrated ESD protection |
| CN111357161A (en) * | 2017-09-19 | 2020-06-30 | 德恩塞两合公司 | Inhibiting loop current in conductive structures of buildings |
| US11165236B2 (en) * | 2017-09-19 | 2021-11-02 | Dehn Se + Co Kg | Suppressing circulating currents in conductive structures in buildings |
| CN111357161B (en) * | 2017-09-19 | 2022-03-04 | 德恩塞两合公司 | Method for designing a lightning protection system and lightning current derivation device |
| US11251595B2 (en) | 2018-07-03 | 2022-02-15 | Erico International Corporation | Lightning protection system and method |
| CN112727711A (en) * | 2021-01-04 | 2021-04-30 | 株洲时代新材料科技股份有限公司 | Lightning protection device for wind driven generator blade |
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