CN203387174U - Device and system for concentrated grounding protection and lightning protection in distribution system - Google Patents
Device and system for concentrated grounding protection and lightning protection in distribution system Download PDFInfo
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- CN203387174U CN203387174U CN201320420488.4U CN201320420488U CN203387174U CN 203387174 U CN203387174 U CN 203387174U CN 201320420488 U CN201320420488 U CN 201320420488U CN 203387174 U CN203387174 U CN 203387174U
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Abstract
The utility model discloses a device and a system for concentrated grounding protection and lightning protection in a distribution system. The device comprises a power supply protective unit and a grounding protection unit, wherein an external power supply supplies power for protected equipment via the power supply protective unit, a grounding PE end of the protected equipment is connected to concentrated ground wires via the grounding protection unit and is then grounded, and the system enables that all source terminals of more than one protected devices are used for grounding all remote ends in different types via the concentrated ground wires. The device and system employ the concentrated grounding technology, wherein grounding can be carried out via ac zero lines or dc anode wires, and concentrated grounding can be also realized by a power cable shielding wire or adding a protective grounding wire into a power cable.
Description
Technical field
The utility model discloses a kind of ground protection and lightning protection field, relates to a kind of concentrated ground protection and lightning protection method and apparatus of compartment system Network Based.
Background technology
Nature has millions of times lightning, the loss that thunder and lightning causes rise to the 3rd of natural calamity every year.Only, in China, the annual casualties caused because of thunderbolt reaches 3,000 people～4,000 people, and property loss reaches 5,000,000,000 yuan～10,000,000,000 yuans.
The related scope of Lightning Disaster almost spreads all over all trades and professions.The advanced microelectronic devices such as the measurement that the large scale integrated circuit of take is core component, monitoring, protection, communication, computer network are widely used in the every field of electric power, aviation, national defence, communication, broadcasting and TV, finance, traffic, petrochemical industry, medical treatment and other modern life; these microelectronic device ubiquities the shortcoming weak to transient overvoltage, overcurrent tolerance; transient overvoltage not only can cause electronic equipment to produce misoperation, also can cause larger direct economic loss and social influence widely.
For a long time, people are carrying out constantly research always and are exploring with the method for conquering damage to crops caused by thunder the essence of atmospheric electrical phenomena.Yet, because a lot of buildings and electronic equipment are not taked reliable ground connection and the effectively lightning current measure of releasing, the powerful transient current that lightning produces not only makes the building of lightning strike spot and equipment suffer serious destruction, and the strong electromagnetic pulse of wide spectrum, amplitude that excites between ground and ionosphere of lightning, make contiguous numerous electronic equipment, transmission lines be subjected to damage.Therefore, grounding technology and good earial drainage method become the important indicator that reduces Lightning Disaster reliably.
Current general grounding technology and lightening arresting method (claiming again lightning protection earthing system); lightning protection facility (as arrester) or lightning protection component (as Surge Protector SPD) directly are connected with earthing device (claiming again ground network or earth mat) by earth connection (lightning protection), for the lightning current of invading provides the passage of the earth of releasing.In addition, ground connection is still protected personal safety (protective earthing), improves electric supply system stability (working earthing), is shielded the important measures of external Electromagnetic Interference (bonding) etc.
Yet grounding technology of the prior art and lightening arresting method exist following problem:
(1) existing grounding technology and lightening arresting method are a kind of methods of utilizing the energy of lightning current itself to make nonlinear device SPD instantaneous short circuit that lightning current is released to the earth by earth connection, know-why, this just needs earthing device to have very little earth resistance.Yet, existence due to soil resistivity, the higher area (as high mountain) at soil resistivity particularly, meet one very the earthing device of small connect ground resistance be to be difficult to very much realize, not only need to build a very large-area ground network, use a large amount of steel, resistance reducing agent, also be faced with the ground network construction and coordinate difficult problem with local administrative department.
(2) existing grounding technology and lightening arresting method are to utilize earth connection and local earthing device to be connected to lightning current to provide leakage path, yet there are many electronic equipments to be difficult to carry out the construction of earthing device in its infield, as the end that zooms out in network distribution system.The indoor end (RRU) that zooms out is arranged on the positions such as vertical shaft, corridor, furred ceiling layer more, is difficult to find the equipment ground point nearby; The outdoor end (RRU) that zooms out often is arranged on building item or urban cells (street) roadside, and the coordination difficulty of building earth mat excavated pavement and local city management department, administration departments is very large.So to network distribution system, construction has brought very large puzzlement to earthing method.
(3) existing grounding technology is in parallel with electronic equipment with lightening arresting method Surge Protector (SPD) in circuit; because there is earth resistance in the SPD branch road; SPD branch road whole lightning current of can't releasing fully; must also can invade electronic equipment by some lightning current; electronic equipment is impacted, and its influence degree depends on the ratio of grounding resistance and load characteristic impedance.
In sum, not only there are very large difficulty in existing grounding technology and lightening arresting method aspect engineering construction, and are difficult to the lightning protection effect that reaches desirable.
Summary of the invention
Not only there is very large difficulty aspect engineering construction for the above-mentioned of the prior art existing grounding technology of mentioning and lightening arresting method; and the shortcoming of the lightning protection effect that is difficult to reach desirable; concentrated ground protection in the utility model refers in network distribution system; zoom out end (RRU) without earthing device (ground network) is installed in this locality, but all ground connection that will zoom out end (RRU) are concentrated grounding by concentrated grounding technology by whole information source ends (BBU).Thereby thoroughly solved the problem that zooms out the local ground connection difficulty of end (RRU) in the network distribution system, and promoted greatly the lightning protection effect of network distribution system.
The technical scheme that the utility model solves its technical problem employing is: a kind of compartment system is concentrated ground protection and thunderstorm electricity protective device; this device comprises power supply unit and ground protection unit; external power supply is given protected equipment power supply by the power supply unit, and the equipment ground PE end of protected equipment is connected to and concentrates earth connection to carry out ground connection by the ground protection unit.
The concentrated ground protection of a kind of compartment system that adopts above-mentioned compartment system to concentrate ground protection and thunderstorm electricity protective device and thunderstorm electricity protective device system, this system is carried out several ground connection by concentrated earth connection to all ends that zooms out by whole information source ends of more than one protected device.
The technical scheme that the utility model solves its technical problem employing further comprises:
Described external power supply is alternating current or direct current.
When described external power supply adopts alternating current; concentrated earth connection is the zero line in alternating current; or concentrated earth connection adopts with the metal-shielded wire ground connection in the feed cable of metal screen layer, or concentrated earth connection adopts the protection increased in feed cable ground wire grounded.
When described external power supply adopts direct current, concentrate earth connection to adopt the DC power supply working earthing, or adopt with the metal-shielded wire ground connection in the feed cable of metal screen layer, or adopt the protection increased in feed cable ground wire grounded.
Described power supply unit comprises interconnective surge protection unit and surge restraining unit.
Described surge protection unit comprises prime SPD module and the rear class SPD module be connected in series, and prime SPD module is connected to the surge restraining unit prime, and rear class SPD module is connected to the surge restraining unit rear class.
Described prime SPD module comprises the piezo-resistance RV1 be connected in series and the gas discharge tube G1 be connected across between two power input lines.
Described prime SPD module also comprises the zero line that is connected across power input line or the piezo-resistance RV2 be connected in series and the gas discharge tube G2 between cathode power supply line and ground protection unit.
Described rear class SPD module comprises the piezo-resistance RV2 be connected in series and the gas discharge tube G2 be connected across between two power input lines.
Described rear class SPD module also comprises the zero line that is connected across power input line or the piezo-resistance RV4 be connected in series and the gas discharge tube G4 between cathode power supply line and ground protection unit.
Described surge restraining unit adopts and is connected in series in two inductance L 1 and inductance L 2 on power input line.
Described inductance L 1 and inductance L 2 adopt high sensibility reciprocal magnetic core inductance, be the transient state high-impedance state under the frequency of lightning current, and power current and direct current are equivalent to short-circuit condition.
Described ground protection unit comprises inductance L 3.
Described ground protection unit also comprises the inductance L 4 be connected in series with inductance L 3.
The beneficial effects of the utility model are: the utlity model has following benefit: 1, because the utility model has adopted concentrated grounding technology; can, by exchanging zero line or direct-flow positive pole line ground connection, also can or increase a protection ground wire at feed cable by the feed cable shielding conductor and realize concentrating ground connection.2, owing to having adopted lightning current passage inhibition technology in the utility model; blocking-up and suppressed the passage that lightning current is invaded protected electronic equipment; lightning current can only be released by Surge Protector (SPD) Zhi Luxiang the earth; the characteristic impedance ratio that makes releasing of lightning current no longer rely on grounding resistance and protected electronic equipment is distributed; but to the earth, release more, can relax the requirement to earth resistance like this.3, owing to adopting the lightning current passage to suppress and the two-stage drainage method in the utility model, it is larger that the through-current capacity of SDP can be done, and the residual voltage after making lightning current by whole lightning protection device is lower, better protecting effect.4, the SPD in the utility model adopts the piezo-resistance body discharge tube structure of collaborating, and can cut off afterflow, prevents earthy counterattack.
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
The accompanying drawing explanation
Fig. 1 is the utility model system block diagram.
Fig. 2 is the utility model embodiment mono-circuit theory diagrams.
Fig. 3 is the utility model embodiment bis-circuit theory diagrams.
Fig. 4 is the utility model embodiment three-circuit schematic diagram.
Fig. 5 is the utility model embodiment tetra-circuit theory diagrams.
Fig. 6 is the utility model embodiment five circuit theory diagrams.
Fig. 7 is the utility model embodiment six circuit theory diagrams.
Fig. 8 is the utility model embodiment seven, eight circuit theory diagrams.
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.
Please refer to accompanying drawing 1, the utility model protects a kind of compartment system to concentrate ground protection and thunderstorm electricity protective device, has avoided the deficiency existed in existing grounding technology and lightening arresting method.Concentrated ground protection in the utility model refers in network distribution system; zoom out end (RRU) without earthing device (ground network) is installed in this locality, but all ground connection that will zoom out end (RRU) are concentrated grounding by concentrated grounding technology by whole information source ends (BBU).Thereby thoroughly solved the problem that zooms out the local ground connection difficulty of end (RRU) in the network distribution system, and promoted greatly the lightning protection effect of network distribution system.
Compartment system in the utility model concentrates ground protection and thunderstorm electricity protective device to comprise power supply unit and ground protection unit; external power supply is given protected equipment power supply by the power supply unit, and the equipment ground PE end of protected equipment is connected to and concentrates earth connection to carry out ground connection by the ground protection unit.
The utility model is protected a kind of system that adopts said apparatus simultaneously, and this system is carried out several ground connection by concentrated earth connection to all ends that zooms out by whole information source ends of more than one protected device.
According to the difference that zooms out end (RRU) electric supply system mode in network distribution system, this concentrated ground protection and lightning protection can be realized by following four kinds of methods.
Method one: by the AC power zero line, realize concentrating ground protection.
Because its interchange zero line of the information source end (BBU) in network distribution system is (the AC power working earthing) of ground connection, the ground connection of zooming out end (RRU) can be connected to the interchange zero line by the ground protection unit and realize concentrating ground connection.
Embodiment mono-: please refer to accompanying drawing 2, Fig. 2 is that the utility model is in AC power supply system, realize exchanging zero line and concentrate one of principle of ground connection, by power supply unit and ground protection unit, formed, its know-why is: the power supply unit is comprised of protection module and lightning current restraining device, wherein protection module comprises that by prime SPD module piezo-resistance RV1 connects with gas discharge tube G1, piezo-resistance RV2 and gas discharge tube G2 are composed in series, wherein, the piezo-resistance RV1 be connected in series and gas discharge tube G1 are connected across between live wire and zero line, the piezo-resistance RV2 be connected in series and gas discharge tube G2 are connected between zero line and ground protection unit, rear class SPD module comprises that piezo-resistance RV3 and gas discharge tube G3 are composed in series, lightning current restraining device inductance L 1, inductance L 2 forms, inductance L 1 is connected in series on the live wire between prime SPD module and rear class SPD module, inductance L 2 is connected in series on the zero line between prime SPD module and rear class SPD module, the piezo-resistance RV3 be connected in series and gas discharge tube G3 are connected across between live wire and zero line, the ground protection unit is by lightning current restraining device inductance L 3, inductance L 4 forms, inductance L 3 and inductance L 4 are connected in series between the equipment ground PE end and zero line of protected equipment, and in the present embodiment, the piezo-resistance RV2 be connected in series and gas discharge tube G2 are connected between inductance L 3 and inductance L 4.L1 wherein, L2, L3, L4 is the high sensibility reciprocal magnetic core inductance designed for the lightning current frequency spectrum, is the transient state high-impedance state under the frequency of lightning current, and power current and direct current are equivalent to short-circuit condition.When there being lightning current to intrude in system, due to lightning current restraining device L1, the inhibitory action of L2, surging lightning stream is suppressed here, make lightning current release toward ground network by zero line, the thunder and lightning restraining device of ground protection unit is high-impedance state simultaneously, can prevent from intruding into by the lightning current of SPD the casing of zero line equipment, the lightning current that also can prevent the equipment shell induction simultaneously intrudes into zero line by concentrated earth connection, can realize zero line grounding like this.And the built-in alloy-type temperature fuse that is close proximity to the SPD surface in SPD the inside can effectively avoid because of SPD deteriorated/disaster hidden-trouble that inefficacy or temporary overvoltage produce, owing to adopting piezo-resistance series connection high-performance gas discharge pipe, two-stage SPD can accomplish follow current interrupt, make the SPD module without afterflow, whole protector residual voltage is lower.
Embodiment bis-: please refer to accompanying drawing 3, in the present embodiment, structure is basically identical with embodiment mono-structure, and difference is, prime SPD module only comprises piezo-resistance RV1 and the gas discharge tube G1 be connected in series, and the ground protection unit comprises an inductance L 3.
Embodiment tri-: please refer to accompanying drawing 4, the structure in the present embodiment is basically identical with embodiment bis-, and difference is, the present embodiment is compared with embodiment bis-, and rear class SPD module has been lacked piezo-resistance RV2 and the gas discharge tube G2 be connected in series.
Embodiment bis-realizes exchanging for the utility model other two kinds of former figure of circuit that zero line is concentrated ground connection with embodiment tri-in AC power supply system; within being protection range of the present utility model; do not only have this three kinds of protection philosophies but do not limit, the combination of other forms of SPD and lightning current restraining device is also within the utility model protection range.
Method two: by the DC power anode line, realize concentrating ground protection.
Because its direct-flow positive pole of information source end (BBU) in network distribution system is (being the DC power supply working earthing) of ground connection, the ground connection of zooming out end (RRU) can be connected to the direct-flow positive pole line by the ground protection unit and realize concentrating ground connection.
Embodiment tetra-: please refer to accompanying drawing 5, Fig. 5 is that the utility model is in DC power system, realize one of principle of the concentrated ground connection of direct-flow positive pole line, it also is comprised of power supply unit and ground protection unit, its know-why is identical with structure with Fig. 2 (being embodiment mono-) principle with circuit structure, difference with embodiment mono-structure for adopting electric main to be powered, its power line is live wire and zero line, in the present embodiment, the DC power supply adopted is powered, negative supply replaces the live wire in embodiment mono-, and positive supply replaces the zero line in embodiment mono-.
Embodiment five: please refer to accompanying drawing 6, the know-why of Fig. 6 is identical with structure with Fig. 3 (being embodiment bis-) principle with circuit structure, difference with embodiment bis-structure for adopting electric main to be powered, its power line is live wire and zero line, in the present embodiment, the DC power supply adopted is powered, and negative supply replaces the live wire in embodiment bis-, and positive supply replaces the zero line in embodiment bis-.
Embodiment six: please refer to accompanying drawing 7, the know-why of Fig. 7 is identical with structure with Fig. 4 (being embodiment tri-) principle with circuit structure, difference with embodiment tri-structure for adopting electric main to be powered, its power line is live wire and zero line, in the present embodiment, the DC power supply adopted is powered, and negative supply replaces the live wire in embodiment tri-, and positive supply replaces the zero line in embodiment tri-.
Embodiment five and embodiment six realize the direct-flow positive pole line for the utility model and concentrate other two kinds of former figure of circuit of ground connection in DC power system; within being protection range of the present utility model; do not only have this three kinds of protection philosophies but do not limit, the combination of other forms of SPD and lightning current restraining device is also within the utility model protection range.
Method three: by the shielding conductor in feed cable, realize concentrating ground connection.
Embodiment seven: this method is mainly due in network distribution system, from information source end (BBU), to zooming out end (RRU), generally all adopting the feed cable with metal screen layer; as long as at information source end (BBU), the feed cable shielding conductor is carried out to good earth, the ground connection of zooming out end (RRU) can be connected to shielding conductor by the ground protection unit and realize concentrating ground connection.
Method four: by the protection ground wire in feed cable, realize concentrating ground connection.
Embodiment eight: this method mainly increases a protection ground wire (being three-phase five-wire mode, single-phase three wire system) at network distribution system information source end (BBU) to the feed cable that zooms out end (RRU); as long as at information source end (BBU), the protection ground wire of this feed cable is carried out to good earth, the ground connection of zooming out end (RRU) can be connected to the protection ground wire by the ground protection unit and realize concentrating ground connection.
Please refer to accompanying drawing 8; embodiment seven is identical with the circuit structure of embodiment eight; Fig. 8 is that the utility model is realized utilizing feed cable shielding conductor ground connection or increased a schematic diagram of protecting ground wire to realize concentrating ground connection at feed cable, and whole protector also is comprised of power supply unit and ground protection unit.The power supply unit is comprised of power supply SPD module and lightning current restraining device; Wherein, protection module comprises that by prime SPD module piezo-resistance RV1 connects with gas discharge tube G1, piezo-resistance RV2 and gas discharge tube G2 are composed in series, rear class SPD module comprises that piezo-resistance RV3 connects with gas discharge tube G3, piezo-resistance RV4 and gas discharge tube G4 are composed in series, the lightning current restraining device is by high sensibility reciprocal magnetic core inductance L 1, and L2 forms; The ground protection unit is by high sensibility reciprocal magnetic core inductance L 3; inductance L 1 is connected in series in negative power line (or the live wire in alternating current; lower same) on; inductance L 2 is connected in series in positive power line (or the zero line in alternating current; lower with) upper, inductance L 3 be connected in series in the feed cable shielding conductor or the protection ground wire that increases at feed cable on.The piezo-resistance RV1 be connected in series and gas discharge tube G1 are connected across between positive power line and negative power line, and be connected to inductance L 1 and inductance L 2 primes, the piezo-resistance RV3 be connected in series and gas discharge tube G3 also are connected across between positive power line and negative power line, and are connected to the rear class of inductance L 1 and inductance L 2; The piezo-resistance RV2 be connected in series and gas discharge tube G2 be connected across positive power line and feed cable shielding conductor or the protection ground wire that increases at feed cable between; and be connected to inductance L 2 and inductance L 3 primes; the piezo-resistance RV4 be connected in series and gas discharge tube G4 also be connected across positive power line and feed cable shielding conductor or the protection ground wire that increases at feed cable between, and be connected to inductance L 2 and inductance L 3 rear classes.Wherein, in the present embodiment, L1, L2, L3 is the high sensibility reciprocal magnetic core inductance designed for the lightning current frequency spectrum, is the transient state high-impedance state under the frequency of lightning current, and power current and direct current are equivalent to short-circuit condition.When there being lightning current to intrude in system, due to lightning current restraining device L1, the inhibitory action of L2, surging lightning stream this here suppressed making by the SPD lightning current by the shielding conductor of power transmission cable and the earth connection of separately establishing of macro station, released, the inhibitor of ground protection unit is high-impedance state simultaneously, can stop the lightning current of the earth connection that shielding conductor or macro station separately establish to intrude on the casing of protected equipment, on the earth connection that also can stop the induction lightening of protected equipment shell to flow to shielding conductor or separately establish, can realize like this shielding conductor of power transmission cable or separately establish earth connection and carry out ground connection.And the built-in alloy-type temperature fuse that is close proximity to the SPD surface in SPD the inside can effectively avoid because of SPD deteriorated/disaster hidden-trouble that inefficacy or temporary overvoltage produce, owing to adopting piezo-resistance series connection high-performance gas discharge pipe, two-stage SPD can accomplish follow current interrupt, make the SPD module without afterflow, and whole protector suppresses to release with two-stage by passage, the residue residual voltage is lower.
The utlity model has following benefit: 1, because the utility model has adopted concentrated grounding technology; can, by exchanging zero line or direct-flow positive pole line ground connection, also can or increase a protection ground wire at feed cable by the feed cable shielding conductor and realize concentrating ground connection.2, owing to having adopted lightning current passage inhibition technology in the utility model; blocking-up and suppressed the passage that lightning current is invaded protected electronic equipment; lightning current can only be released by Surge Protector (SPD) Zhi Luxiang the earth; the characteristic impedance ratio that makes releasing of lightning current no longer rely on grounding resistance and protected electronic equipment is distributed; but to the earth, release more, can relax the requirement to earth resistance like this.3, owing to adopting the lightning current passage to suppress and the two-stage drainage method in the utility model, it is larger that the through-current capacity of SDP can be done, and the residual voltage after making lightning current by whole lightning protection device is lower, better protecting effect.4, the SPD in the utility model adopts the piezo-resistance body discharge tube structure of collaborating, and can cut off afterflow, prevents earthy counterattack.
Claims (10)
1. a compartment system is concentrated ground protection and thunderstorm electricity protective device; it is characterized in that: described device comprises power supply unit and ground protection unit; external power supply is given protected equipment power supply by the power supply unit, and the equipment ground PE end of protected equipment is connected to and concentrates earth connection to carry out ground connection by the ground protection unit.
2. compartment system according to claim 1 is concentrated ground protection and thunderstorm electricity protective device, it is characterized in that: described external power supply is alternating current or direct current, when external power supply adopts alternating current, concentrated earth connection is the zero line in alternating current, or concentrated earth connection adopts with the metal-shielded wire ground connection in the feed cable of metal screen layer, or concentrated earth connection adopts the protection increased in feed cable ground wire grounded; When external power supply adopts direct current, concentrate earth connection to adopt the DC power supply working earthing, or adopt with the metal-shielded wire ground connection in the feed cable of metal screen layer, or adopt the protection increased in feed cable ground wire grounded.
3. compartment system according to claim 1 and 2 is concentrated ground protection and thunderstorm electricity protective device; it is characterized in that: described power supply unit comprises interconnective surge protection unit and surge restraining unit; the surge protection unit comprises prime SPD module and the rear class SPD module be connected in series; prime SPD module is connected to the surge restraining unit prime; rear class SPD module is connected to the surge restraining unit rear class, and rear class SPD module comprises the piezo-resistance RV2 be connected in series and the gas discharge tube G2 be connected across between two power input lines.
4. compartment system according to claim 3 is concentrated ground protection and thunderstorm electricity protective device, and it is characterized in that: described prime SPD module comprises the piezo-resistance RV1 be connected in series and the gas discharge tube G1 be connected across between two power input lines.
5. compartment system according to claim 4 is concentrated ground protection and thunderstorm electricity protective device, it is characterized in that: described prime SPD module also comprises the zero line that is connected across power input line or the piezo-resistance RV2 be connected in series and the gas discharge tube G2 between cathode power supply line and ground protection unit.
6. compartment system according to claim 3 is concentrated ground protection and thunderstorm electricity protective device, it is characterized in that: described rear class SPD module also comprises the zero line that is connected across power input line or the piezo-resistance RV4 be connected in series and the gas discharge tube G4 between cathode power supply line and ground protection unit.
7. compartment system according to claim 3 is concentrated ground protection and thunderstorm electricity protective device; it is characterized in that: described surge restraining unit adopts and is connected in series in two inductance L 1 and inductance L 2 on power input line; inductance L 1 and inductance L 2 adopt high sensibility reciprocal magnetic core inductance; be the transient state high-impedance state under the frequency of lightning current, and power current and direct current are equivalent to short-circuit condition.
8. compartment system according to claim 1 and 2 is concentrated ground protection and thunderstorm electricity protective device, and it is characterized in that: described ground protection unit comprises inductance L 3.
9. compartment system according to claim 8 is concentrated ground protection and thunderstorm electricity protective device, and it is characterized in that: described ground protection unit also comprises the inductance L 4 be connected in series with inductance L 3.
10. one kind adopts compartment system as in one of claimed in any of claims 1 to 9 to concentrate the compartment system of ground protection and thunderstorm electricity protective device to concentrate ground protection and thunderstorm electricity protective device system, and it is characterized in that: described system is carried out several ground connection by concentrated earth connection to all ends that zooms out by whole information source ends of more than one protected device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320420488.4U CN203387174U (en) | 2013-07-16 | 2013-07-16 | Device and system for concentrated grounding protection and lightning protection in distribution system |
| CN201310296497.1A CN103384064B (en) | 2013-07-16 | 2013-07-16 | A kind of compartment system concentrates ground protection and thunderstorm electricity protective device and system |
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| CN201320420488.4U CN203387174U (en) | 2013-07-16 | 2013-07-16 | Device and system for concentrated grounding protection and lightning protection in distribution system |
| CN201310296497.1A CN103384064B (en) | 2013-07-16 | 2013-07-16 | A kind of compartment system concentrates ground protection and thunderstorm electricity protective device and system |
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| CN203387174U true CN203387174U (en) | 2014-01-08 |
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| CN201310296497.1A Active CN103384064B (en) | 2013-07-16 | 2013-07-16 | A kind of compartment system concentrates ground protection and thunderstorm electricity protective device and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103384064A (en) * | 2013-07-16 | 2013-11-06 | 深圳远征技术有限公司 | Distribution system concentrated ground protection and lightning protection device and system |
| CN104253426A (en) * | 2014-09-03 | 2014-12-31 | 烽火通信科技股份有限公司 | Lightning protection circuit and lightning protection method for direct-current power supply port of communication equipment |
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| US20160146924A1 (en) * | 2014-11-26 | 2016-05-26 | Honeywell International Inc. | Intrinsic safety barrier circuit with series blocking capacitor |
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| CN106816863B (en) * | 2017-03-14 | 2019-01-22 | 浙江大学 | A shore-based power supply emergency grounding protection circuit for submarine observation network |
| CN109617037A (en) * | 2018-12-27 | 2019-04-12 | 深圳锦天乐防雷技术有限公司 | A joint grounding system for multi-channel hierarchical isolation and suppression of lightning and electromagnetic surges |
| CN120414447A (en) * | 2024-01-31 | 2025-08-01 | 华为技术有限公司 | Photovoltaic inverter and photovoltaic power generation system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201623377U (en) * | 2009-11-23 | 2010-11-03 | 中国移动通信集团设计院有限公司 | An outdoor integrated distribution box |
| CN101976830A (en) * | 2010-11-18 | 2011-02-16 | 南京信息工程大学 | Surge protection device of high-definition network video camera |
| WO2012159358A1 (en) * | 2011-08-01 | 2012-11-29 | 华为技术有限公司 | Lightning protection radio remote unit, distributed base station and lightning protection system and method thereof |
| CN203387174U (en) * | 2013-07-16 | 2014-01-08 | 深圳远征技术有限公司 | Device and system for concentrated grounding protection and lightning protection in distribution system |
-
2013
- 2013-07-16 CN CN201320420488.4U patent/CN203387174U/en not_active Expired - Lifetime
- 2013-07-16 CN CN201310296497.1A patent/CN103384064B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103384064A (en) * | 2013-07-16 | 2013-11-06 | 深圳远征技术有限公司 | Distribution system concentrated ground protection and lightning protection device and system |
| CN103384064B (en) * | 2013-07-16 | 2016-08-17 | 深圳远征技术有限公司 | A kind of compartment system concentrates ground protection and thunderstorm electricity protective device and system |
| CN104253426A (en) * | 2014-09-03 | 2014-12-31 | 烽火通信科技股份有限公司 | Lightning protection circuit and lightning protection method for direct-current power supply port of communication equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103384064A (en) | 2013-11-06 |
| CN103384064B (en) | 2016-08-17 |
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