CN203617702U - Lightning protection device, lightning protection combination and lightning protection cabinet - Google Patents
Lightning protection device, lightning protection combination and lightning protection cabinet Download PDFInfo
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- CN203617702U CN203617702U CN201320617423.9U CN201320617423U CN203617702U CN 203617702 U CN203617702 U CN 203617702U CN 201320617423 U CN201320617423 U CN 201320617423U CN 203617702 U CN203617702 U CN 203617702U
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- lightning protection
- protection device
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- isolating transformer
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Abstract
The utility model provides a lightning protection device, a lightning protection combination and a lightning protection cabinet. The lightning protection device is characterized in that nonlinear elements (101) are connected to the primary or the secondary of an isolation transformer (102) in parallel, or the nonlinear elements (101) are connected to the primary and the secondary of the isolation transformer (102) in parallel respectively, two leads of a primary coil of the isolation transformer (102) are used as the two input ends of the lightning protection device, two leads of a secondary coil of the isolation transformer (102) are used as the two output ends of the lightning protection device, and an iron core and a shielding shell of the isolation transformer are used as the ground wire end of the lightning protection device. The isolation transformer is used as the main lightning protection component, the structure is simple, the lightning protection effect is good, and the defects in the prior art are overcome.
Description
Technical field
The open a kind of new lightning protection device of the utility model, lightning protection combination and lightning protection cabinet; Particularly relate to lightning protection device, lightning protection combination, lightning protection cabinet in railway track circuit protection use.
Background technology
Along with the particularly development of electronic technology of science and technology, reliability, the security requirement of electronic product are more and more higher, security protection, the particularly electronic product of electronic product prevent thunderbolt or surge aspect lightning protection device be widely used.Prior art is used the non-linear elements such as piezo-resistance, gas discharge tube, gas gap, transient diode to form lightning protection circuit mostly; electronic equipment is protected; ordinary circumstance is; to indulge cross-protection to a pair of power circuit or signal circuit, need multiple above-mentioned non-linear elements to carry out longitudinally and or horizontal combination.Due to characteristic and the residual voltage different sizes of various non-linear elements; more corresponding responsive electronic equipments, need to be used in conjunction with different non-linear elements and be combined into multistage protection circuit, just can play the protective effect to electronic equipment; many, the complex circuit of nonlinear device using, lightning protection effect is bad.Particularly, to railway track circuit protection, often there is track circuit equipment to be occurred by the situation of broken by lightning, the normal operation of railway is caused to harmful effect.
Summary of the invention
For the shortcoming of prior art, the utility model provides a kind of Novel lightning-proof device, lightning protection combination and lightning protection cabinet, and it adopts isolating transformer as main lightning protection component, simple in structure, and lightning protection effect is good, has overcome the shortcoming of prior art.
The technical scheme that the utility model technical solution problem adopts is: a kind of lightning protection device, and this lightning protection device structure is that non-linear element is parallel to the elementary or secondary of isolating transformer; Or non-linear element is parallel to respectively isolating transformer primary and secondary, two lead-in wires of isolating transformer primary coil are as two inputs of lightning protection device, two lead-in wires of isolating transformer secondary coil are as two outputs of lightning protection device, and the screen of isolating transformer iron core and secondary coil is as the ground terminal of lightning protection device.
A kind of lightning protection combination that adopts above-mentioned lightning protection device, is connected respectively to input terminal row by the lightning protection device input described at least 1 and lightning protection device output is connected respectively to outgoing line terminal board, and the ground terminal of lightning protection device is all received on an earth terminal.
Adopt a lightning protection cabinet for above-mentioned lightning protection combination, configure at least one lightning protection combination described above in cabinet, two wire casings are set in cabinet, wherein a side line groove is used for walking inlet wire, and opposite side wire casing is used for walking outlet; In cabinet, be also provided with the ground wire being connected with each lightning protection combination earth terminal.
The technical scheme that the utility model technical solution problem adopts further comprises:
Described isolating transformer secondary coil distributed capacitance is over the ground the more than 50 times of the distributed capacitance of primary coil to secondary coil.
Described isolating transformer secondary coil adopts three shielding layer grounding structures.
Secondary and the elementary coiling number of turns ratio of described isolating transformer is for 1.05-1.15 is than 1.
Described non-linear element is piezo-resistance or discharge tube or transient diode or their series connection and/or parallel combination.
Lightning protection device described at least 1 is arranged on mounting panel, on mounting panel, be also provided with the input terminal row that connects lightning protection device input and the outgoing line terminal board of output that is connected lightning protection device, it is upper that the input of each lightning protection device is connected respectively to input terminal row, and the output of each lightning protection device is connected respectively on outgoing line terminal board; An earth terminal is set on mounting panel, and the ground terminal of lightning protection device is all received on this earth terminal.
Described mounting panel outside is provided with shielding case, and some protrudes from screening can described non-linear element, and described terminal board, outgoing line terminal board, the earth terminal of carrying out, exposes screening can.
Described lightning protection device and input terminal row, outgoing line terminal board are separately positioned on two faces of mounting panel; Or it is upper that lightning protection device and input terminal row, outgoing line terminal board are arranged on same of mounting panel, the mode that lightning protection device to input terminal row, outgoing line terminal board adopts twisted wire and/or shielding wire casing is set is connected.
Because adopting the non-linear element mode in parallel with isolating transformer, the utility model makes lightning protection device, it is simple in structure, particularly lightning protection device of the present utility model adopts and regulates the primary and secondary stary capacity of coil size of isolating transformer, thereby over-voltage suppression is delivered to the principle of secondary coil, residual voltage is low, through experiment test, superpotential inhibition ability is exceeded to 2/1000ths, there is extraordinary lightning protection effect, can effectively prevent that track circuit is struck by lightning and damages.
Lightning protection combination of the present utility model, due to lightning protection device and protected circuit are concentrated on a mounting panel protected equipment is carried out to systematic protection, particularly railway track circuit equipment is carried out to systematicness protection, simplify lightning protection circuit, be more conducive to lightning protection centralized management; On mounting panel, arrange into and out of line terminals, the circuit into and out of lightning protection device is come respectively, can reduce into and out of phase mutual interference between line; Multiple lightning protection devices use same earth point to be connected with earth mat, and there is to positive effect the aspect such as usage quantity and the impact of ground wire on other line electricity magnetic disturbance that reduces ground wire.
Lightning protection cabinet of the present utility model, due to numerous lightning protection devices and protected circuit are concentrated in a cabinet, to protected equipment concentrate, systematicness protection, further simplify lightning protection circuit, be greatly convenient to lightning protection centralized management; Particularly on railway, for some stations more occasion of track circuits, use after lightning protection cabinet of the present utility model, can make whole canyon greatly succinct, simplify; Wire casing into and out of use is set in cabinet, the signal line into and out of lightning protection device is isolated, reduce influencing each other of signal line; Lightning protection device in a cabinet uses same earth point to be connected with earth mat, and there is to further good effect the aspect such as usage quantity and the impact of ground wire on other line electricity magnetic disturbance that reduces ground wire.
Track circuit means of defence of the present utility model, because lightning protection device of the present utility model has low-down residual voltage, by after lightning protection device access track circuit of the present utility model, track circuit equipment is not easy to be struck by lightning bad, guarantee the reliability of equipment, to ensureing that the normal operation of railway has very important good effect.
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
Accompanying drawing explanation
Fig. 1 is the utility model lightning protection device schematic diagram, and 101 is non-linear element, and 102 is isolating transformer.
Fig. 2 is the isolating transformer equivalent circuit theory figure of the utility model lightning protection device
The circuit diagram of Fig. 3 the utility model lightning protection combination, in figure, 11 is lightning protection device of the present utility model, 201 and 202 is inlet wire and outlet leading-out terminal row.
Fig. 4 is the structural representation of the utility model lightning protection combination, and 11 is lightning protection device of the present utility model, and 21 is the utility model lightning protection composite entity.
Fig. 5 is the utility model lightning protection combining structure schematic diagram another side, 203 earth terminals, and 204 is mounting panel.
Fig. 6 is the outline drawing that shielding case is installed in lightning protection combination.
Fig. 7 is that another angle of lightning protection combination installation shielding case is seen outline drawing.
Fig. 8 is the circuit diagram of the utility model lightning protection cabinet.
Fig. 9 is the structural representation of the utility model lightning protection cabinet, and 301,301 show respectively inlet wire and outlet wire casing, and 303 is ground wire.
Embodiment
The present embodiment is the utility model preferred implementation, and other all its principles are identical with the present embodiment or approximate with basic structure, all within the utility model protection range.
As shown in Fig. 1, the utility model embodiment has a non-linear element 101 to be parallel to the elementary of an isolating transformer 102, two lead-in wires of isolating transformer 102 primary coils are as the input of lightning protection device, two lead-in wires of isolating transformer 102 secondary coils are as the output of lightning protection device, and the shielding of isolating transformer iron core and secondary coil is as ground terminal.So; with non-linear element and a five-port lightning protection device of isolation transformation group formation; in a pair of circuit that lightning protection device series connection access of the present utility model is needed protection; by non-linear element, this circuit is carried out to cross-protection; circuit is carried out to vertical protection with isolating transformer, can realize this vertical cross-protection to circuit.
Another embodiment of the present utility model is: non-linear element 101 is connected in parallel on the secondary of isolating transformer.
Another embodiment of the present utility model is: non-linear element 101 is parallel to respectively the primary and secondary of isolating transformer 102.
In the present embodiment, the non-linear element 101 of employing is piezo-resistance or discharge tube or transient diode or their series connection and/or parallel combination.Wherein, non-linear element 101 is piezo-resistances, and piezo-resistance is high-impedance state before conducting, is low resistive state after conducting; Under normal circumstances, on protected circuit, there is no overvoltage, not conducting of piezo-resistance, in the time there is overvoltage in the circuit of protected equipment, piezo-resistance conducting is also fallen overvoltage by piezo-resistance short circuit, thereby plays the effect of protection equipment.Non-linear element 101 can be also discharge tube, and discharge tube is open-circuit condition before conducting, is short-circuit condition after conducting; Under normal circumstances, on protected circuit, there is no overvoltage, not conducting of discharge tube, in the time there is overvoltage in the circuit of protected equipment, discharge tube conducting is also fallen overvoltage by discharge tube short circuit, thereby plays the effect of protection equipment.Non-linear element 101 can also be transient diode, and transient diode is high-impedance state before conducting, is low resistive state after conducting; Under normal circumstances, on protected circuit, there is no overvoltage, not conducting of transient diode, in the time there is overvoltage in the circuit of protected equipment, transient diode conducting is also fallen overvoltage by transient diode short circuit, thereby plays the effect of protection equipment.
The serial or parallel connection combination that non-linear element 101 described in the utility model can also be piezo-resistance and discharge tube; Or discharge tube and the combination of transient diode serial or parallel connection; Or the serial or parallel connection of piezo-resistance and transient diode combination; Or serial or parallel connection or the series-parallel connection combination of pressure-sensitive, discharge tube, transient diode.In a word, while needing only normal work, present high resistant or open-circuit condition, run into the device that overvoltage presents low-resistance or short-circuit condition, conduct non-linear element of the present utility model that can be alternative.
Secondary and the elementary coiling number of turns of the isolating transformer 102 adopting in the present embodiment compares for 1.05-1.15 is than 1, preferably 1.08:1.After isolating transformer line attachment, line signal is had to attenuation, the elementary ratio with the secondary coil number of turns of suitable adjustment, when secondary coil connects after load, elementary and secondary voltage ratio approaches 1.According to the situation of protected circuit load, be generally set in 1.05-1.15:1 by secondary with the number of turns ratio of primary coil.
Isolating transformer 102 secondary coils that adopt in the present embodiment distributed capacitance is over the ground far longer than the distributed capacitance of primary coil to secondary coil.In the time of coiling primary and secondary coil, adjust two coil copper cash and distribute, increase secondary coil distributed capacitance over the ground, adjust elementary and distance secondary coil, reduce the distributed capacitance of two coils.This can make secondary coil distributed capacitance and the elementary distributed capacitance gap to secondary coil over the ground increase; Can also be to the mode of three bonding structures of secondary employing, further increase secondary coil and reduce electric capacity elementary and time inter-stage with the distributed capacitance on ground.Three bonding structures refer to, after the innermost layer of secondary coil and outermost layer and one of them facing layer link together with shielding link together.
As shown in Figure 2, primary coil voltage to earth is U
1, secondary coil voltage to earth is U
2:
U
2 C
12
━━━ = ━━━━━
U
1 C
12+C
2
So, when capacitor C elementary and time coil
12little, and secondary coil direct-to-ground capacitance C
2greatly, on while there is overvoltage, be delivered to secondary coil voltage just by large high attenuation, use this principle, can reduce secondary coil voltage to earth, reach lightning protection object, it can be verified by experiment below.
To the lightning protection device of the present utility model experiment of being struck by lightning: experimental technique is, two inputs of lightning protection device and two outputs are connected together separately, 5000V1.2/50 waveform is applied to lightning protection device input and earth terminal impacts, with oscilloscope, output and earth terminal are measured, measurement data sees the following form:
| 1 | 2 | 3 | 4 | |
| Input voltage to earth | 5000V | 5000V | 5000V | 5000V |
| Output voltage to earth | 9.2V | 8.2V | 8.5V | 8.7V |
Due to lightning protection device of the present utility model, change the principle of the distributed capacitance size of the primary and secondary coil of isolating transformer by employing, suppress secondary coil voltage over the ground; As lightning protection component, substitute traditional lightning protection component with isolating transformer, can make the residual voltage of lightning protection device very low, there is beyond thought lightning protection effect.Passable from upper table, be applied to the surge voltage that lightning protection device input of the present utility model has 5000 volts, only have the voltage of several volts to be transferred to output, the ability of its over-voltage suppression exceedes 2/1000ths; And common lightning protection device in prior art, as U
cfor the lightning protection device of 270V, its residual voltage is generally more than 1500V, and minimum also can exceed 1000V.Upper table experimental data shows that the utility model lightning protection device residual voltage is very little, has extraordinary lightning protection effect.
If Fig. 3 is the circuit diagram of the utility model lightning protection combination, the input of above-mentioned lightning protection device 11 and input terminal to be arranged to 201 and be connected, the output of lightning protection device 11 is connected with outgoing line terminal board 202, the earth terminal of the each lightning protection device then ground connection that links together.
Lightning protection combining structure schematic diagram of the present utility model as shown in Figure 4,5, at least one above-mentioned lightning protection device is installed on mounting panel 204, input terminal row 201 and outgoing line terminal board 202 are set on mounting panel 204, and the input of lightning protection device 11 is connected on input terminal row 201 by twisted wire; The outlet of 11 liang of outputs of lightning protection device accesses on outgoing line terminal board 202 by cross spider.Using cross spider and input terminal row and outgoing line terminal board are arranged is respectively in order to prevent into and out of phase mutual interference between line.Certainly, the line into and out of end of lightning protection device also can, by being connected separately with into and out of terminal board after the shielding wire casing arranging respectively, arrange an earth terminal 203 on mounting panel 204 again, and the ground terminal of lightning protection device 11 is all received on this earth point.The quantity of the circuit that the quantity basis of lightning protection device 11 will protect is set on mounting panel and determines, it is best, and quantity is installed is 8.
In order to install, easy to maintenance, can also on mounting panel 204, gang socket be set, the mode that lightning protection device 11 use are pegged graft is arranged on this socket., as lightning protection device fault, only lightning protection device need to be extracted in the future, replace with new lightning protection device, very convenient.
Embodiment mounting means shown in Fig. 4 and Fig. 5 is that the parts such as lightning protection device 11 and input terminal row 201, outgoing line terminal board 202 are separately positioned on two faces of mounting panel 204; Other way of example, also can be arranged on lightning protection device 11 and these parts on same of mounting panel 204.The arrangement of various devices in lightning protection combination, what depend on protected equipment completely actually please need to carry out reasonable coordination.
Embodiment as shown in Figure 6 and Figure 7 fills mode, and a screening can is also set.Some protrudes from shell the non-linear element 101 of lightning protection device, when after this non-linear element fault, can be pulled out easily replacing.In order to facilitate engineering wiring, screening can is also provided with some open slots, described input terminal row 201, and outgoing line terminal board 202, earth terminal 203 exposes respectively the respective openings groove place at screening can.
In the protection of railway track circuit and relevant device, the demand in the track circuit that foundation need to be protected or relevant device quantity, on-the-spot installation environment space, can select one or more lightning protection combinations of the present utility model to protect.
Lightning protection combination of the present utility model, due to lightning protection device and protected circuit are concentrated on a mounting panel protected equipment is carried out to systematic protection, particularly railway track circuit equipment is carried out to systematicness protection, simplify lightning protection circuit, be more conducive to lightning protection centralized management; On mounting panel, arrange into and out of line terminals, the circuit into and out of lightning protection device is come respectively, can reduce into and out of phase mutual interference between line; Multiple lightning protection devices use same earth point to be connected with earth mat, and there is to positive effect the aspect such as usage quantity and the impact of ground wire on other line electricity magnetic disturbance that reduces ground wire.
Circuit diagram as shown in Figure 8, in the more situation of the equipment needing protection, can use multiple above-mentioned lightning protection combinations to be configured; Multiple lightning protection combinations are concentrated in together, after the earth point in lightning protection combination links together, be connected with earth mat again.
Lightning protection cabinet schematic diagram as shown in Figure 9, one cabinet is set, above-mentioned lightning protection combination is assemblied in cabinet, in cabinet, at least configure an above-mentioned lightning protection combination, two wire casings (301,302) are set in cabinet, the wire casing of one of them is as inlet wire wire casing, and another wire casing is as outlet wire casing.It is upper that all circuit inlet wires are received respectively corresponding input terminal row after inlet wire groove, and all outlets are received on corresponding circuit arrangement through outlet wire casing from outgoing line terminal board is drawn.Earth connection 303 is also set in cabinet, the earth point in all lightning protection combinations is connected, be connected with earth mat via this earth connection.
Owing to needing on railway, the equipment of protection is a lot, concentrate in canyon, if thunder resisting equipment is installed before each equipment, carry out dispersed lightning protection, lightning protection ground wire can be a lot of and in disorder like this, when lightning protection device is had an effect, electric current on ground wire is very large and produce electromagnetic interference miscellaneous equipment, uses lightning protection cabinet of the present utility model, and the device line of needs protection is concentrated in a cabinet, concentrated setting lightning protection device protects, and can play good effect.
Lightning protection cabinet of the present utility model, due to numerous lightning protection devices and protected circuit are concentrated in a cabinet, to protected equipment concentrate, systematicness protection, further simplify lightning protection circuit, be greatly convenient to lightning protection centralized management; Particularly on railway, for some stations more occasion of track circuits, use after lightning protection cabinet of the present utility model, can make whole canyon greatly succinct, simplify; Wire casing into and out of use is set in cabinet, the signal line into and out of lightning protection device is isolated, reduce influencing each other of signal line; Lightning protection device in a cabinet uses same earth point to be connected with earth mat, and there is to further good effect the aspect such as usage quantity and the impact of ground wire on other line electricity magnetic disturbance that reduces ground wire.
The utility model embodiment also relates to a kind of means of defence of railway track circuit, the steps include: the cable of track circuit outside to access lightning protection device 11 inputs of aforementioned utility model, the cable of track circuit mimic panel side is accessed to the output of aforementioned utility model lightning protection device 11, the ground terminal of lightning protection device is connected with contiguous earth mat.
Can use aforementioned lightning protection combination to protect in the more situation of the track circuit that will protect, its method is: the lightning protection device of at least one aforementioned utility model is arranged on a mounting panel, input terminal row and outgoing line terminal board are set on mounting panel; Accordingly, the cable of at least one track circuit outside is arranged with the input of corresponding lightning protection device and is connected respectively through input terminal, the cable of mimic panel side is connected respectively with the output of lightning protection device through outgoing line terminal board, all lightning protection device ground terminal accesses are arranged on the earth terminal on mounting panel, are connected with earth mat by this earth terminal.
In the many especially situations of the track circuit needing protection, can use aforesaid lightning protection cabinet to protect, its means of defence is: the lightning protection combination of at least one aforementioned utility model is arranged in a cabinet, at cabinet inlet wire wire casing and outlet wire casing be set respectively, the cable of track circuit outside is process from inlet wire wire casing, and the cable of mimic panel side passes through from outlet wire casing; Earth terminal on mounting panel through being set in cabinet, a ground wire phase is connected with contiguous earth mat.
Claims (10)
1. a lightning protection device, is characterized in that: described lightning protection device structure is that non-linear element (101) is parallel to the elementary or secondary of isolating transformer (102), or non-linear element (101) is parallel to respectively isolating transformer (102) primary and secondary; Two lead-in wires of isolating transformer (102) primary coil are as two inputs of lightning protection device, two lead-in wires of isolating transformer (102) secondary coil are as two outputs of lightning protection device, and the screen of isolating transformer iron core and secondary coil is as the ground terminal of lightning protection device.
2. lightning protection device according to claim 1, is characterized in that: described isolating transformer (102) secondary coil distributed capacitance is over the ground the more than 50 times of the distributed capacitance of primary coil to secondary coil.
3. lightning protection device according to claim 2, is characterized in that: described isolating transformer (102) secondary coil adopts three shielding layer grounding structures.
4. according to the lightning protection device of claim 1 or 2 or 3, it is characterized in that: the secondary and elementary coiling number of turns ratio of described isolating transformer (102) is for 1.05-1.15 is than 1.
5. want 1 or 2 or 3 lightning protection device according to right, it is characterized in that: described non-linear element (101) is piezo-resistance or discharge tube or transient diode or their series connection and/or parallel combination.
6. one kind adopts the lightning protection combination of the lightning protection device described in any one in claim 1 to 5, it is characterized in that: the lightning protection device input described at least 1 is connected respectively to input terminal row (201) and lightning protection device output is connected respectively to outgoing line terminal board (202), the ground terminal of lightning protection device is all received on an earth terminal (203).
7. lightning protection combination according to claim 6, it is characterized in that: at least 1 is arranged on mounting panel (204) as the lightning protection device as described in any in claim 1 to 5, on mounting panel (204), be also provided with the input terminal row (201) that connects lightning protection device input and the outgoing line terminal board (202) of output that is connected lightning protection device, it is upper that the input of each lightning protection device is connected respectively to input terminal row (201), and the output of each lightning protection device is connected respectively on outgoing line terminal board (202); An earth terminal is set on mounting panel (204), and the ground terminal of lightning protection device is all received on this earth terminal.
8. lightning protection combination according to claim 7, it is characterized in that: described mounting panel (204) outside is provided with shielding case, some protrudes from shielding case described non-linear element (101), and described input terminal row (201), outgoing line terminal board (202), earth terminal (203) expose shielding case.
9. according to the lightning protection combination described in claim 7 or 8, it is characterized in that: described lightning protection device and input terminal row (201), outgoing line terminal board (202) are separately positioned on two faces of mounting panel (204); Or it is upper that lightning protection device and input terminal row (201), outgoing line terminal board (202) are arranged on same of mounting panel (204), the mode that lightning protection device to input terminal row (201), outgoing line terminal board (202) adopts twisted wire and/or shielding wire casing is set is connected.
10. the lightning protection cabinet of the employing lightning protection combination as described in claim 6 or 7 or 8 or 9, it is characterized in that: in cabinet, configure the lightning protection combination described at least one, two wire casings (301,302) are set in cabinet, and wherein a side line groove is used for walking inlet wire, and opposite side wire casing is used for walking outlet; In cabinet, be also provided with the ground wire (303) being connected with each lightning protection combination earth terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320617423.9U CN203617702U (en) | 2013-09-30 | 2013-09-30 | Lightning protection device, lightning protection combination and lightning protection cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320617423.9U CN203617702U (en) | 2013-09-30 | 2013-09-30 | Lightning protection device, lightning protection combination and lightning protection cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617702U true CN203617702U (en) | 2014-05-28 |
Family
ID=50770325
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320617423.9U Withdrawn - After Issue CN203617702U (en) | 2013-09-30 | 2013-09-30 | Lightning protection device, lightning protection combination and lightning protection cabinet |
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| CN (1) | CN203617702U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474977A (en) * | 2013-09-30 | 2013-12-25 | 深圳科安达电子科技股份有限公司 | Lightning protection device, lightning protection combination and lightning protection cabinet |
-
2013
- 2013-09-30 CN CN201320617423.9U patent/CN203617702U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474977A (en) * | 2013-09-30 | 2013-12-25 | 深圳科安达电子科技股份有限公司 | Lightning protection device, lightning protection combination and lightning protection cabinet |
| CN103474977B (en) * | 2013-09-30 | 2016-10-05 | 深圳科安达电子科技股份有限公司 | A kind of lightning protection device, lightning protection combination and lightning protection cabinet |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140528 Effective date of abandoning: 20161005 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140528 Effective date of abandoning: 20161005 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |