CN103296668A - Multiple-pulse synchronous thunder and lightning isolating inhibiting unit, circuit and method - Google Patents
Multiple-pulse synchronous thunder and lightning isolating inhibiting unit, circuit and method Download PDFInfo
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- CN103296668A CN103296668A CN2013102364756A CN201310236475A CN103296668A CN 103296668 A CN103296668 A CN 103296668A CN 2013102364756 A CN2013102364756 A CN 2013102364756A CN 201310236475 A CN201310236475 A CN 201310236475A CN 103296668 A CN103296668 A CN 103296668A
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Abstract
The invention discloses a multiple-pulse synchronous thunder and lightning isolating inhibiting unit. The multiple-pulse synchronous thunder and lightning isolating inhibiting unit comprises a band elimination filter, wherein a first end of the band elimination filter is connected with a port of a strong lightning area; a second end of the band elimination filter is connected with an equipment port of a protected area; and impedance of the band elimination filter increases along with increase of lightning wave frequency. The invention also discloses a multiple-pulse synchronous thunder and lightning isolating inhibiting circuit and meanwhile discloses a multiple-pulse synchronous thunder and lightning isolating inhibiting method. The multiple-pulse synchronous thunder and lightning isolating inhibiting unit, circuit and method has the advantages of avoiding dependence on cable characteristics, enabling most part of invasion of lightning current to be blocked and isolated and taking a good lightning protection effect on protected equipment.
Description
Technical field
The present invention relates to a kind of shocking preventing technology field, related in particular to the synchronous thunder and lightning of a kind of multiple-pulse and isolate the inhibition unit.
The invention still further relates to the synchronous thunder and lightning of a kind of multiple-pulse and isolated the inhibition circuit.
The invention still further relates to the synchronous thunder and lightning of a kind of multiple-pulse and isolated the inhibition method.
Background technology
Existing shocking preventing technology is based on thunder and lightning overvoltage characteristic, high impedance moment is converted into low-impedance nonlinear device is connected in parallel in the power circuit.When thunder and lightning is invaded; start the over-pressure safety device of nonlinear device; provide by-pass shunt, dividing potential drop, current by pass to power circuit; with the lightning current earth mat of releasing; rely on multistage lightning protection measures; reduce circuit or equipment pressure drop, reduction potential difference over the ground, realize the overvoltage protection to equipment, system.Owing to be the protection mode that adopts the lightning current energy to shift, so can be subjected to the influence of factors such as lightning protection device earth connection length, thickness, induction reactance, ground network ground resistance size, lightning protection device inter-stage matching problem, make that the protection effect of equipment, system is poor, safeguard damages easily.Because the connection of circuit is not superconductor, under the lightning wave frequency effect, lightning protection device two ends cable can produce induction reactance, impedance, parasitic capacitance and the potential difference that forms.This potential difference can be calculated according to following formula: U=Ldi/dt, as the lightning current of the long 1m (1.44mH) that goes between, invasion is 20kA (8/20 μ s), and then the voltage on every meter lead is reduced to 3.6kV, if the switch power supply equipment working grounding cable is 10 meters, then current potential can be raised to 36kV, causes damaging.If the lightning current of signal system invasion be 5kA (8/20 μ s) then the voltage on every meter lead reduce to 0.9kV, current potential can be raised to about 6kV, information system equipment can cause damaging because of overvoltage.The resistance of line resistance can be subjected to the influence of power frequency, and frequency is more high, and impedance is more big.
Reckon without the lightning wave frequency in the present lightning protection theory to the high-frequency resistance of cable, lightning protection device earth connection, earth mat downlead, the influence of high frequency induction reactance factor.Existing lightning protection specification requirement all needs to have ground system, and it is the smaller the better to pursue earth mat ground connection resistance, is convenient to better loose stream.All require to adopt the joint grounding system according to building lightning protections such as IEC IEC1312, standard GB 50057, standard GB 50343 and the standard YD5098 of Ministry of Industry and Information design related specifications; the lightning protection device that is about to system (case), Switching Power Supply place of working, equipment casing protection ground, signal shielding ground be connected to ground system through confluence copper bar, realizes the equipotential connection.But because the connection cable of equipment is not superconducting conductor, the cable resistance can be subjected to the effects limit such as site environment of lightning wave frequency, cable characteristic (length, induction reactance, sectional area) and engineering construction, can not realize that real equipotential connects, then equipment room then forms voltage difference.And when there is the thunder and lightning invasion on earth mat or lightning protection device ground, according to IEC and GB relevant criterion, has 50% lightning current and strike back to equipment, the thunder and lightning energy of its invasion is born by power-supply system, signal system, metallic conduit respectively.When if this machine room building is subjected to the 200KA lightning discharge, earth mat looses and flows 50%, and the lightning current of 100KA is then strikeed back power-supply system, signal system in addition, causes device damage, influences personal safety.Therefore need a kind of dependence that can reduce cable characteristic, ground network resistance size of research, thereby make the thunder and lightning energy effectively be released, shift, isolate the shocking preventing technology of inhibition.
Summary of the invention
The technical problem to be solved in the present invention is in order to overcome technological deficiency recited above, to provide the synchronous thunder and lightning of a kind of multiple-pulse to isolate and suppressed the unit; Also provide the synchronous thunder and lightning of a kind of multiple-pulse to isolate and suppressed circuit; Also provide the synchronous thunder and lightning of a kind of multiple-pulse to isolate the inhibition method.
In order to solve technical problem recited above, the present invention takes following technical scheme:
The synchronous thunder and lightning of a kind of multiple-pulse is isolated and is suppressed the unit; include band stop filter; first end of described band stop filter connects the port in strong minefield; second end of described band stop filter connects the device port of protection zone, the band stop filter that described band stop filter increases along with the increase of lightning wave frequency for its impedance.
As a kind of preferred version, be in series with resettable fuse between the device port of described band resistance filter filter and protection zone.
The synchronous thunder and lightning of a kind of multiple-pulse is isolated and is suppressed circuit, includes aforesaid band stop filter, also comprises first order surge protector and second level surge protector; First end of described first order surge protector connects first end of band stop filter, the second end ground connection of first order surge protector; Second end of described band stop filter connects the device port of protection zone; First end of described second level surge protector connects second end of band stop filter, the second end ground connection of second level surge protector.
Surge protector (SPD) is also referred to as lightning protection device.
As a kind of preferred version; also include resettable fuse; first end of described resettable fuse connects second end of band stop filter; second end of described resettable fuse connects the device port of protection zone; first end of second level surge protector connects second end of resettable fuse, the second end ground connection of second level surge protector.
The synchronous thunder and lightning of a kind of multiple-pulse is isolated the inhibition method; include the synchronous thunder and lightning of aforesaid multiple-pulse and isolate the inhibition circuit; the lightning wave that comprises the steps: strong minefield is isolated under the effect of the band stop filter that suppresses circuit at the synchronous thunder and lightning of multiple-pulse; reflection; stop most of lightning wave energy; the lightning wave energy is decayed and the peak value steepness of lightning wave energy is reduced; make mild that the waveform of lightning wave energy becomes; prolonged the wave period of lightning wave energy; start earlier first order surge protector most of lightning wave energy of releasing; remaining lightning wave energy is released by the second level surge protector that starts; make the lightning wave energy can not enter the device port of protection zone, realize that the thunder and lightning isolation suppresses.
As a kind of preferred version; the lightning wave in strong minefield is isolated under the effect of the band stop filter that suppresses circuit at the synchronous thunder and lightning of multiple-pulse; reflection; stop most of lightning wave energy; the lightning wave energy is decayed and the peak value steepness of lightning wave energy is reduced; make mild that the waveform of lightning wave energy becomes; prolonged the wave period of lightning wave energy; start earlier first order surge protector most of lightning wave energy of releasing; the lightning wave energy of invasion is through resettable fuse; make resettable fuse be varied to a big impedance device; further decay lightning wave energy; remaining lightning wave energy is released by the second level surge protector that starts; make the lightning wave energy can not enter the device port of protection zone, realize that the thunder and lightning isolation suppresses.
Suppress the frequency range of lightning wave concentration of energy at 100Hz～1MHz.
Further, suppress the frequency range of lightning wave concentration of energy at 1KHz～1MHz.
Further, suppress the frequency range of lightning wave concentration of energy at 10KHz～1MHz.
Detect through information industry communication products barrier propterty quality supervision and test center, the checkout equipment of employing has: model is that digital-storage oscillograph, the model of TDS1012B-SC is 8/20﹠amp; 10/350 impulse current test device.The synchronous thunder and lightning of multiple-pulse of the present invention is isolated and is suppressed unit frequency testing impedance data such as table one, owing to be subjected to the restriction of equipment, maximum frequency can only be tested to 300KHz; Thunder and lightning frequency impedance of the present invention suppresses scope between 100HZ-1MHZ, coincide with nature lightning ripple frequency range; Present different impedances in different frequency ranges, frequency is more big, impedance more big (seeing Table).
| Test frequency | 10KHz | 100KHz | 300KHz |
| Resistance value | 6.85KΩ | 22.72KΩ | 44.46KΩ |
Table one
The synchronous thunder and lightning of multiple-pulse of the present invention is isolated the inhibition units in series in the power-supply system loop of protected equipment, when thunder and lightning is invaded, under the lightning wave frequency effect, the synchronous thunder and lightning of multiple-pulse is isolated the impedance that suppresses the unit and is risen with the rising of lightning wave frequency, because lightning wave is isolated under the hindrance function that suppresses the unit and can be reflected at the synchronous thunder and lightning of multiple-pulse, part energy can reflect back, and energy is decayed; The synchronous thunder and lightning of multiple-pulse is isolated the impedance that suppresses the unit also can make the peak value steepness of lightning wave reduce, decay lightning wave steepness, and the wave period elongation with the thunder and lightning frequency spectrum gets gently the lightning energy quantitative change, reduces the lightening pulse peak value to the impact of equipment.
The lightning wave relative energy is accumulated frequency spectrum such as table two at present:
| Frequency/Hz | 8/20(μs) | 10/200(μs) | 10/350(μs) | 1.2/50(μs) | 10/700(μs) | 4/300(μs) | 0.25/200(μs) |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1.081×10 -5 | 1.654×10 -4 | 3.019×10 -4 | 4.352×10 -5 | 6.217×10 -4 | 2.669×10 -4 | 9.118×10 -5 |
| 10 | 1.081×10 -4 | 1.654×10 -3 | 3.019×10 -3 | 4.352×10 -4 | 6.217×10 -3 | 2.669×10 -3 | 9.118×10 -4 |
| 100 | 1.081×10 -3 | 0.0165 | 0.0301 | 4.352×10 -3 | 0.0619 | 0.0266 | 9.118×10 -3 |
| 1K | 0.0108 | 0.1619 | 0.2882 | 0.0434 | 0.4391 | 0.2706 | 0.0905 |
| 6.27K | - | - | - | - | 0.9000 | - | - |
| 10K | 0.1074 | 0.7551 | 0.8739 | 0.3823 | 0.9964 | 0.8535 | 0.6122 |
| 12.48K | - | - | 0.9000 | - | - | - | - |
| 14.63K | - | - | - | - | - | 0.9000 | - |
| 21.58K | - | 0.9000 | - | - | - | - | - |
| 43.88K | - | - | - | - | - | - | 0.9000 |
| 87.5K | - | - | - | 0.9000 | - | - | - |
| 100K | 0.7337 | 0.9874 | 0.9929 | 0.9131 | 0.9964 | 0.9880 | 0.9562 |
| 183.17K | 0.9000 | - | - | - | - | - | - |
| 1M | 0.9887 | 0.9999 | 0.9999 | 0.9956 | 0.9999 | 0.9998 | 0.9961 |
| 100M | 1.0000 | 1.0000 | 1.0000 | 0.9999 | 1.0000 | 1.0000 | 0.9998 |
Table two
Thunder and lightning waveform with 8/20 μ s is example, the cycle of reference waveform is 28 μ s, isolates under the effect that suppresses the unit through the synchronous thunder and lightning of multiple-pulse of the present invention, and the cycle of waveform is elongated to 68～75 μ s, lightning current wave deformation is got gently, reduced the impact of lightening pulse peak value to equipment greatly.
The present invention has the band stop filter of Chinese People's Anti-Japanese Military and Political College's electric current, anti-high frequency magnetic saturation characteristic by series connection in protected equipment loop, when thunder and lightning is invaded, band stop filter is sync response under the effect of lightning wave frequency, frequency size according to the invasion lightning current, be changed to the damping device of different impedances, in most of lightning current reflected back circuit with invasion, blocking-up lightning current level is backward propagated most of thunder and lightning energy of decaying; Also reduce the steepness of peak value lightening pulse, the fraction thunder and lightning energy of invading is converted into electromagnetic field, make the very mild of peak value thunder and lightning rheology, reduce the impact to equipment.The present invention had both avoided the dependence to the cable characteristic, also can block, isolate the invasion of most lightning currents, and protected equipment is played best lightning protection effect.
Description of drawings
Fig. 1 is that the synchronous thunder and lightning of multiple-pulse is isolated first structural representation that suppresses the unit.
Fig. 2 is that the synchronous thunder and lightning of multiple-pulse is isolated second structural representation that suppresses the unit.
Fig. 3 is that the synchronous thunder and lightning of multiple-pulse is isolated first structural representation that suppresses circuit.
Fig. 4 is that the synchronous thunder and lightning of multiple-pulse is isolated first structural representation that suppresses circuit.
Among the figure, 1. band stop filter, 2. resettable fuse, 3. first surge protector, 4. second surge protector, 5. strong minefield, 6. protection zone.
Embodiment
See also Fig. 1; as shown in the figure; the synchronous thunder and lightning of a kind of multiple-pulse is isolated and is suppressed the unit; include band stop filter 1; first end of band stop filter 1 connects the port in strong minefield 5; second end of band stop filter 1 connects the device port of protection zone 6, the band stop filter that band stop filter 1 increases along with the increase of lightning wave frequency for its impedance.
See also Fig. 2; as shown in the figure; the synchronous thunder and lightning of a kind of multiple-pulse is isolated and is suppressed the unit; include band stop filter 1; first end of band stop filter 1 connects the port in strong minefield 5; second end of band stop filter 1 connects the device port of protection zone 6, band stop filter 1 for its impedance along with the band stop filter that the increase of lightning wave frequency increases, be in series with resettable fuse 2 between the device port of band resistance filter filter 1 and protection zone 6.The synchronous thunder and lightning of this kind multiple-pulse is isolated and is suppressed cellular construction and be composed in series by the macromolecular material resettable fuse (PPTC) of the bandreject filtering device with Chinese People's Anti-Japanese Military and Political College's electric current, anti-high frequency magnetic saturation characteristic and overcurrent, overtemperature protection, and band stop filter and resettable fuse are connected in the electric power loop; The bandreject filtering device is in prime, and resettable fuse is in the back level.When thunder and lightning is invaded, the prime band stop filter is sync response under the effect of lightning wave frequency, frequency size according to the invasion lightning current, be changed to the damping device of different impedances, in the part lightning current reflected back circuit that both will invade, blocking-up lightning current level is backward propagated most of thunder and lightning energy of decaying; Also reduce the steepness of peak value lightening pulse, the thunder and lightning energy that fraction is invaded is converted into electromagnetic field, makes the very mild of peak value thunder and lightning rheology, reduces the impact to equipment.Lightning current is after band stop filter consumes most of energy; advance the resettable fuse current foldback circuit of back level again; this circuit mainly is overcurrent protection; operation that can safety under normal load current; when big electric current was invaded, the molecular structure of resettable fuse changed, and changes into a big resistance; according to size of current and temperature coefficient, the proportional realization overcurrent protection of impedance.The synchronous thunder and lightning of this multiple-pulse is isolated and is suppressed the advantage that cellular construction has taken full advantage of band stop filter and resettable fuse, the prime band stop filter is according to the frequency size of invasion lightning current, adjust the characteristic of its impedance magnitude automatically, force to reduce the steepness of thunder and lightning, the lightning wave deformation of peak value gets gently, make that the lightning wave energy is decayed, the wave period of lightning wave is prolonged (wave period as 8/20 μ s lightning wave is 68～75 μ s from 28 μ s time-delay), plays the effect that reduces to impact, block, isolate most lightning currents; Back level is utilized the overcurrent of resettable fuse and the characteristics of overtemperature protection, and remaining lightning current makes the molecule structure change of PPTC inside become the device of a big impedance, can't access arrangement with lightning current, be isolated in outside the system.The synchronous thunder and lightning isolation of multiple-pulse inhibition unit returns to normal channel status after lightning current disappears.
See also Fig. 3, as shown in the figure, the synchronous thunder and lightning of a kind of multiple-pulse is isolated and is suppressed circuit, includes band stop filter 1, also comprises first order surge protector 3 and second level surge protector 4; First end of first order surge protector 3 connects first end of band stop filter 1, the second end ground connection of first order surge protector 3; Second end of described band stop filter connects the device port of protection zone; First end of second level surge protector 4 connects second end of band stop filter 1, the second end ground connection of second level surge protector 4.
See also Fig. 4, as shown in the figure, the synchronous thunder and lightning of a kind of multiple-pulse is isolated and is suppressed circuit, includes band stop filter as described above 1, also comprises first order surge protector 3 and second level surge protector 4; First end of first order surge protector 3 connects first end of band stop filter 1, the second end ground connection of first order surge protector 3; First end of second level surge protector 4 connects second end of band stop filter 1; the second end ground connection of second level surge protector 4; also include resettable fuse 2; first end of resettable fuse 2 connects second end of band stop filter 1; second end of resettable fuse 2 connects the device port of protection zone 6; first end of second level surge protector 4 connects second end of resettable fuse 2, the second end ground connection of second level surge protector 4.
The synchronous thunder and lightning of a kind of multiple-pulse is isolated the inhibition method; include the synchronous thunder and lightning of multiple-pulse as described above and isolate the inhibition circuit; the lightning wave that comprises the steps: strong minefield is isolated under the effect of the band stop filter that suppresses circuit at the synchronous thunder and lightning of multiple-pulse; reflection; stop most of lightning wave energy; the lightning wave energy is decayed and the peak value steepness of lightning wave energy is reduced; make mild that the waveform of lightning wave energy becomes; prolonged the wave period of lightning wave energy; start earlier first order surge protector most of lightning wave energy of releasing; remaining lightning wave energy is released by the second level surge protector that starts; make the lightning wave energy can not enter the device port of protection zone, realize that the thunder and lightning isolation suppresses.
As a kind of preferred version; the lightning wave in strong minefield is isolated under the effect of the band stop filter that suppresses circuit at the synchronous thunder and lightning of multiple-pulse; reflection; stop most of lightning wave energy; the lightning wave energy is decayed and the peak value steepness of lightning wave energy is reduced; make mild that the waveform of lightning wave energy becomes; prolonged the wave period of lightning wave energy; start earlier first order surge protector most of lightning wave energy of releasing; the lightning wave energy of invasion is through resettable fuse; make resettable fuse be varied to a big impedance device; further decay lightning wave energy; remaining lightning wave energy is released by the second level surge protector that starts; make the lightning wave energy can not enter the device port of protection zone, realize that the thunder and lightning isolation suppresses.
Suppress the frequency range of lightning wave concentration of energy at 100Hz～1MHz.Further, suppress the frequency range of lightning wave concentration of energy at 1KHz～1MHz.Further, suppress the frequency range of lightning wave concentration of energy at 10KHz～1MHz.
Claims (9)
1. the synchronous thunder and lightning of multiple-pulse is isolated and is suppressed the unit; include band stop filter; first end of described band stop filter connects the port in strong minefield; second end of described band stop filter connects the device port of protection zone, it is characterized in that: the band stop filter that described band stop filter increases along with the increase of lightning wave frequency for its impedance.
2. the synchronous thunder and lightning of multiple-pulse as claimed in claim 1 is isolated and is suppressed the unit, it is characterized in that: be in series with resettable fuse between the device port of described band resistance filter filter and protection zone.
3. the synchronous thunder and lightning of multiple-pulse is isolated and is suppressed circuit, it is characterized in that: include band stop filter as claimed in claim 1, also comprise first order surge protector and second level surge protector; First end of described first order surge protector connects first end of band stop filter, the second end ground connection of first order surge protector; Second end of described band stop filter connects the device port of protection zone; First end of described second level surge protector connects second end of band stop filter, the second end ground connection of second level surge protector.
4. the synchronous thunder and lightning of multiple-pulse as claimed in claim 3 is isolated and is suppressed circuit; it is characterized in that: also include resettable fuse; first end of described resettable fuse connects second end of band stop filter; second end of described resettable fuse connects the device port of protection zone; first end of second level surge protector connects second end of resettable fuse, the second end ground connection of second level surge protector.
5. the synchronous thunder and lightning of multiple-pulse is isolated the inhibition method; include as claim 3 or the synchronous thunder and lightning of 4 described multiple-pulses and isolate the inhibition circuit; it is characterized in that; the lightning wave that comprises the steps: strong minefield is isolated under the effect of the band stop filter that suppresses circuit at the synchronous thunder and lightning of multiple-pulse; reflection; stop most of lightning wave energy; the lightning wave energy is decayed and the peak value steepness of lightning wave energy is reduced; make mild that the waveform of lightning wave energy becomes; prolonged the wave period of lightning wave energy; start earlier first order surge protector most of lightning wave energy of releasing; remaining lightning wave energy is released by the second level surge protector that starts; make the lightning wave energy can not enter the device port of protection zone, realize that the thunder and lightning isolation suppresses.
6. the synchronous thunder and lightning of multiple-pulse as claimed in claim 5 is isolated the inhibition method; it is characterized in that: the lightning wave in strong minefield is isolated under the effect of the band stop filter that suppresses circuit at the synchronous thunder and lightning of multiple-pulse; reflection; stop most of lightning wave energy; the lightning wave energy is decayed and the peak value steepness of lightning wave energy is reduced; make the mild wave period that prolongs the lightning wave energy of the waveform change of lightning wave energy; start earlier first order surge protector most of lightning wave energy of releasing; the lightning wave energy of invasion is through resettable fuse; make resettable fuse be varied to a big impedance device; further decay lightning wave energy; remaining lightning wave energy is released by the second level surge protector that starts; make the lightning wave energy can not enter the device port of protection zone, realize that the thunder and lightning isolation suppresses.
7. isolate the inhibition method as claim 5 or the synchronous thunder and lightning of 6 described multiple-pulses, it is characterized in that: suppress the frequency range of lightning wave concentration of energy at 100Hz～1MHz.
8. the synchronous thunder and lightning of multiple-pulse as claimed in claim 7 is isolated the inhibition method, it is characterized in that: suppress the frequency range of lightning wave concentration of energy at 1KHz～1MHz.
9. the synchronous thunder and lightning of multiple-pulse as claimed in claim 8 is isolated the inhibition method, it is characterized in that: suppress the frequency range of lightning wave concentration of energy at 10KHz～1MHz.
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Cited By (1)
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| CN107271874A (en) * | 2017-06-02 | 2017-10-20 | 北京英瑞来科技有限公司 | A kind of fault arc detection method and device for considering the influence of lightning current xegregating unit |
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| CN102916413A (en) * | 2012-10-25 | 2013-02-06 | 深圳市雷博斯科技有限公司 | Lightning frequency impedance control unit |
| CN203352158U (en) * | 2013-06-07 | 2013-12-18 | 深圳市雷博斯科技有限公司 | Multi-pulse synchronous lightning isolation suppression unit and circuit |
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| US20060227481A1 (en) * | 2005-04-08 | 2006-10-12 | Hon Hai Precision Industry Co., Ltd. | Power supply for a bus interface |
| CN200969511Y (en) * | 2006-11-09 | 2007-10-31 | 智勇 | 4-20mA sensor interface protective circuit |
| CN102916418A (en) * | 2012-10-25 | 2013-02-06 | 深圳市雷博斯科技有限公司 | Lightning protection and alarm structure |
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| CN107271874A (en) * | 2017-06-02 | 2017-10-20 | 北京英瑞来科技有限公司 | A kind of fault arc detection method and device for considering the influence of lightning current xegregating unit |
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Application publication date: 20130911 |