CN202856332U - Isolation protection device and isolation protection circuit preventing ground potential high voltage counterattack - Google Patents
Isolation protection device and isolation protection circuit preventing ground potential high voltage counterattack Download PDFInfo
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- CN202856332U CN202856332U CN 201220548697 CN201220548697U CN202856332U CN 202856332 U CN202856332 U CN 202856332U CN 201220548697 CN201220548697 CN 201220548697 CN 201220548697 U CN201220548697 U CN 201220548697U CN 202856332 U CN202856332 U CN 202856332U
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Abstract
The utility model discloses an isolation protection device preventing ground potential high voltage counterattack, which comprises a lightning current frequency impedance controller unit of a grounding system, wherein the lightning current frequency impedance controller unit is formed by connecting a band rejection filter and a counterattack diode unit in series. The utility model further discloses an isolation protection circuit preventing the ground potential high voltage counterattack, which comprises a lightning protection ground, a protection ground, and an isolation protection device connected between the lightning protection ground and the protection ground in series. According to the utility model, an isolation protection device is provided, and the isolation protection device is connected between the lightning protection ground and the protection ground in series; when the lightning current counterattacks from the lightning protection ground end, the band rejection filter turns into a device with high impedance instantly and isolates the counterattack lightning current; as the diode has the characteristic of single-phase conduction, residual voltage of a power frequency part is isolated by the diode unit when passing through the band rejection filter, thereby enabling the power frequency low-energy lightning current not to pass through the counterattack diode unit and come into protection ground equipment, and effectively protecting the equipment.
Description
Technical field
The utility model has related to a kind of isolating and protecting device, relates in particular to a kind of isolating and protecting device that prevents the counterattack of earth potential high pressure.
The utility model has also related to isolation protective circuit.
Background technology
The earth connection of network, communications equipment room mainly comprises lightning proof ground (also being called doughtily) and protection ground (protection ground also is weak ground, comprises place of working and equipment ground) two classes by Function Classification at present.Lightning proof ground: refer to provide for power circuit, the signal line of equipment or system the device of by-pass shunt passage, the thunder and lightning overvoltage in the circuit is shunted over the ground, shifted; Its cable that connects over the ground is on the lightning protection line.Equipment ground: avoid AC and DC power supply line that equipment and the person are constituted a threat to, the not live metal casing in the equipment is connected to the ground, and when electric leakage or casing occuring when charged, guarantees personal safety.The place of working: the reference potential that provides for the operation of electric power, electronic equipment is with reference to ground.
Two classes in ideal ground should be separate, do not interfere with each other, or each own independently ground network, and the equipment on especially weak ground can not be subject to strong earthy impact, otherwise has the danger of high pressure counterattack.But earthing mode adopts the joint grounding system now, is about to all earth connections (protection ground, lightning proof ground) and is connected on the bus-bar, is connected with earth mat by downlead.Existing earthing mode has following defective and deficiency:
Early investment and maintenance cost are high when 1, building earth mat.Distich is closed grounding resistance requirement integrated communication building less than 1 Ω according to YD5098-2005 " communication bureau's (station) lightning protection and grounding engineering design standard ", and the mobile communication base station is less than 10 Ω.For the normal operation of equipment and lightning protection requirement, earth resistance is less, lightning protection effect is better, in order to realize that small connect ground resistance forms ground network, the a large amount of chemical products such as copper material, steel, resistance reducing agent and earth rod of normal employing improve P in soil H value and come reducing ground resistance, unavoidably there is couple corrosion in its metal structure, thereby has accelerated the corrosion rate of earth electrode, and useful life is short and need a large amount of human and material resources of cost, financial resources to drop into.
2, build the ground network construction difficult, measure difficult, Maintenance Difficulty and rectification difficult.Construction is difficult: difficulty is carried out earth mat construction, materials handling, operation etc. in the base station (such as station, city, stone mountain, Gobi desert, desert etc.) of high earthing resistivity.It is difficult to measure: the restriction of method of measurement and environmental factor can not reach the low-resistance value of real " standard-required ".Maintenance Difficulty: owing to need to bury a large amount of metal materials underground, increased antitheft work and difficulty.Rectification is difficult: the factors such as earth mat climate, material oxidation, resistance-lowering material loss, and earth resistance can increase gradually, need to carry out the secondary rectification, and difficulty and input are not second to the early investment cost.
3, influence each other between grounding system, the grounding apparatus.Owing to all carrying out joint grounding by the concurrent of same bus-bar, the mode of common network with the ground wire that connects weakly doughtily, even therefore earth resistance reaches standard, both influencing each other is also very large, will mutually conduct, disturbs, cause the counterattack of earth potential high pressure and high pressure conduction along weak ground wire (equipment ground line, working earthing line) when especially lightning surge voltage enters union ground grid by lightning protection.
4, electrical theory basis science not.The interference value of the earth potential reality of joint grounding system is that (KV level) and communication network device EMC value are not the same orders of magnitude for (V level), can not reach the requirement of communication work ground connection EMC according to the theoretical method that adopts reducing ground resistance of Ohm's law, (should be m Ω magnitude rather than Ω magnitude by this theoretical earth resistance).
The utility model content
The technical problems to be solved in the utility model is in order to overcome technological deficiency recited above, a kind of isolating and protecting device that prevents the counterattack of earth potential high pressure to be provided.A kind of isolation protective circuit also is provided simultaneously.
In order to solve technical problem recited above, the utility model is taked following technical scheme:
A kind of isolating and protecting device that prevents the counterattack of earth potential high pressure; include the lightning current frequency impedance controller unit (being called for short ALFB) of grounding system, described lightning current frequency impedance controller unit is composed in series by band stop filter and counterattack diode.
As a kind of optimal way, described counterattack diode is served as reasons 2 strike back the counterattack diode arrays that diodes in parallel forms at least.
A kind of isolation protective circuit that prevents the counterattack of earth potential high pressure includes lightning proof ground and protection ground, also includes as weighing the isolating and protecting device of the above, and described isolating and protecting device is connected between lightning proof ground and the protection ground.
One end of the band stop filter of described isolating and protecting device is connected with the first wiring bus-bar of lightning proof ground port, and the other end of band stop filter is connected with the counterattack diode cathode, and the counterattack diode cathode links to each other with the second wiring bus-bar of protection ground port.
The isolating and protecting device that the utility model provides; band stop filter and counterattack diode by series connection form lightning current frequency impedance controller unit; and with isolating and protecting device be connected on lightning proof ground and the protection ground between; band stop filter moment is the device of a high impedance when lightning current is strikeed back from the lightning proof ground end; isolation counterattack lightning current; because diode possesses single-phase conductive characteristic; when the residual voltage of power frequency part can be by the isolation of counterattack diode during through band stop filter; make power frequency; low-energy lightning current can't enter by the counterattack diode equipment on protection ground, has effectively protected equipment.
Description of drawings
Fig. 1 is the first structure chart of isolating and protecting device of the present utility model.
Fig. 2 is the second structure chart of isolating and protecting device of the present utility model.
Fig. 3 is the 3rd structure chart of isolating and protecting device of the present utility model.
Fig. 4 is the structure chart of isolation protective circuit of the present utility model.
Among the figure, 1. lightning current frequency impedance controller unit, 12. band stop filters, 13. counterattack diodes, 131. counterattack diode arrays, 2. lightning proof ground, 3. protection ground, 4. the first wiring bus-bar, 5. the second wiring conflux, 6. isolating and protecting device.
Embodiment
See also Fig. 1; as shown in the figure; a kind of isolating and protecting device that prevents earth potential high pressure counterattack includes the lightning current frequency impedance controller unit 1 of grounding system, and lightning current frequency impedance controller unit 1 is composed in series by band stop filter 12 and counterattack diode 13.Wherein band stop filter 12 is used for connecting lightning proof ground, and counterattack diode 13 is used for connecting protection ground.
See also Fig. 2 and Fig. 3; as shown in the figure; a kind of isolating and protecting device that prevents the counterattack of earth potential high pressure; include the lightning current frequency impedance controller unit 1 of grounding system; lightning current frequency impedance controller unit 1 is composed in series by band stop filter 12 and counterattack diode 13, and counterattack diode 13 is served as reasons 2 strike back the counterattack diode arrays 131 that diodes in parallel forms at least.Wherein band stop filter 12 is used for connecting lightning proof ground, and counterattack diode array 131 is used for connecting protection ground.
See also Fig. 4; as shown in the figure; a kind of isolation protective circuit that prevents the counterattack of earth potential high pressure; include lightning proof ground 2 and protection ground 3; between lightning proof ground and protection ground, be in series with isolating and protecting device 6; one end of the band stop filter of isolating and protecting device is connected with the first wiring bus-bar 4 of lightning proof ground port, and the other end of band stop filter is connected with the counterattack diode cathode, and the counterattack diode cathode links to each other with the second wiring bus-bar 5 of protection ground port.The first wiring bus-bar connects union ground grid by earth resistance R.Among the figure, lines a, b are representing respectively the track route of thunder-strike current.
Lightning proof ground end in isolating and protecting device inside arranges a high-precision lightning current instrument transformer; before having the lightning current counterattack to enter isolating and protecting device; instrument transformer gathers the lightning current of invasion; collection signal is passed to the lightning monitoring unit; the lightning monitoring recorder can record counterattack lightning current size, back flashover number of times and back flashover time, and realizes remote control.
The utlity model has following characteristics:
1, the lightning proof ground that is grounded system separates with protection ground, makes two ground reference separate, does not interfere with each other when the thunder and lightning invasion is arranged, and eliminates the earth potential counterattack, and the isolation lightning current is to the conduction of protection ground equipment.
2, realize large grounding through resistance, make lightning protection effect not exclusively depend on earth resistance, make lightning protection effect and earth resistance irrelevant.ALFB moment is the device of a large impedance when lightning current is invaded, and this impedance is certain to greater than the earth resistance impedance, according to current characteristics (electric current is walked the Low ESR loop), force lightning current toward earth mat earial drainage, the discharge less than his impedance, to have realized large grounding through resistance technology.
3, need not to drop into a large amount of copper materials, steel, resistance reducing agent, a large amount of human and material resources, the financial resources construction low resistance earth mats of need cost.
4, realize lightning monitoring, the high pressure counterattack information that thunder and lightning is produced records, stores, and can record this device and resist number of lightning strokes, time, lightning current size, for maintenance, the investigation of equipment provides reference data.
Claims (4)
1. isolating and protecting device that prevents earth potential high pressure counterattack; include the lightning current frequency impedance controller unit of grounding system, it is characterized in that: described lightning current frequency impedance controller unit is composed in series by band stop filter and counterattack diode.
2. isolating and protecting device as claimed in claim 1 is characterized in that: described counterattack diode at least 2 the counterattack diode arrays that the counterattack diodes in parallel forms of serving as reasons.
3. isolation protective circuit that prevents earth potential high pressure counterattack; include lightning proof ground and protection ground; it is characterized in that: also include such as claim 1 or 2 arbitrary described isolating and protecting devices, described isolating and protecting device is connected between lightning proof ground and the protection ground.
4. isolation protective circuit as claimed in claim 3; it is characterized in that: an end of the band stop filter of described isolating and protecting device is connected with the first wiring bus-bar of lightning proof ground port; the other end of band stop filter is connected with the counterattack diode cathode, and the counterattack diode cathode links to each other with the second wiring bus-bar of protection ground port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220548697 CN202856332U (en) | 2012-10-24 | 2012-10-24 | Isolation protection device and isolation protection circuit preventing ground potential high voltage counterattack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220548697 CN202856332U (en) | 2012-10-24 | 2012-10-24 | Isolation protection device and isolation protection circuit preventing ground potential high voltage counterattack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202856332U true CN202856332U (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220548697 Expired - Fee Related CN202856332U (en) | 2012-10-24 | 2012-10-24 | Isolation protection device and isolation protection circuit preventing ground potential high voltage counterattack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202856332U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904231A (en) * | 2012-10-24 | 2013-01-30 | 深圳市雷博斯科技有限公司 | Insulation protection device for preventing high-voltage counterattack of ground potential |
| CN114172109A (en) * | 2021-12-13 | 2022-03-11 | 武汉凯飞通信科技有限公司 | Lightning isolation protection system for three-phase alternating-current power supply of lightning protection box |
-
2012
- 2012-10-24 CN CN 201220548697 patent/CN202856332U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904231A (en) * | 2012-10-24 | 2013-01-30 | 深圳市雷博斯科技有限公司 | Insulation protection device for preventing high-voltage counterattack of ground potential |
| CN102904231B (en) * | 2012-10-24 | 2016-07-06 | 深圳市雷博斯科技有限公司 | Prevent isolating and protecting device and isolation protective circuit thereof that earth potential high pressure strikes back |
| CN114172109A (en) * | 2021-12-13 | 2022-03-11 | 武汉凯飞通信科技有限公司 | Lightning isolation protection system for three-phase alternating-current power supply of lightning protection box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20161024 |