CN1625013A - Lingtning-protection grounding system - Google Patents
Lingtning-protection grounding system Download PDFInfo
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- CN1625013A CN1625013A CN 200310120072 CN200310120072A CN1625013A CN 1625013 A CN1625013 A CN 1625013A CN 200310120072 CN200310120072 CN 200310120072 CN 200310120072 A CN200310120072 A CN 200310120072A CN 1625013 A CN1625013 A CN 1625013A
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- lightning protection
- protection device
- power consumption
- ground connection
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Abstract
A lightning protection earthed system. It includes the lightning protector, the electric equipment and the chief earth row, there into: this lightning protection system also includes the lightning protector earth row that is equipped near the relating lightning protector, and the earthed wires of the relating lightning protector, the electric equipment electrically connect to the earth row of the lightning protector and connect to the chief earth row. This advantage is assure the safety of the electric equipment.
Description
Technical field
The present invention relates to electrical technology, particularly relate to a kind of lightning protection earthing system.
Background technology
The AC power that power consumption equipment uses in the building is normally introduced from the outdoor AC electrical network by supply line.When being struck by lightning near the electrical network or when attacking directly in electrical network, can produce the overvoltage ripple on the line, this overvoltage ripple road along the line spreads into indoor, invades power consumption equipment by AC power supply system, causes the damage of power consumption equipment.So, in the AC power porch of power consumption equipment a lightning protection device SPD is set, also promptly: surge protector (Surge ProtectiveDevices) carries out lightning protection, and this is very important.
Lightning protection earthing system of the prior art as shown in Figure 1; this system comprises: lightning protection device SPD11, power consumption equipment 12, total ground connection row 13; AC power is at first received lightning protection device SPD 11; be connected to power consumption equipment 12; and the earth connection of lightning protection device SPD 11 is received by cable L1 on total ground connection row 13 of building, and the protective earthing line of power consumption equipment is also received on total ground connection row 13 by cable L2 simultaneously.
When lightning current is come in from the outside, lightning protection device SPD 11 lightning current of releasing a residual voltage value U (under the normal condition, this residual voltage is that power consumption equipment can bear) can occur on the lightning protection device SPD 11.Because the protective earthing line of power consumption equipment 12 is received on total ground connection row 13, the relative common reference point of lightning protection device SPD11 and power consumption equipment 12 is total ground connection row 13.The pressure drop U1 that cable L1 this moment (ground wire inductance) produces when the thunderbolt earial drainage just can not ignore, and the voltage that the power consumption equipment power port is born is: U+U1.Because when project installation, the length of earth cable L1 is often longer, according to computing formula:
U1=R*i+L*di/dt, wherein, R is the resistance of cable L1, L is the inductance of its output, and i is the earial drainage electric current, and di/dt is the time rate of change of this electric current, the U1 that earth cable L1 brings is easy to reach several kilovolts, is far longer than the voltage request that bears of power consumption equipment 12 AC power mouths.
Therefore, when thunderbolt, the power consumption equipment power port can produce bigger overvoltage in the prior art, easily damage equipment.
Summary of the invention
The invention provides a kind of lightning protection earthing system, the power consumption equipment power port easily produces bigger overvoltage, the problem of damage equipment easily when solving the thunderbolt that prior art exists.
For addressing the above problem, the invention provides following technical scheme:
A kind of lightning protection earthing system includes lightning protection device, power consumption equipment and total ground connection row, wherein:
This lightning protection earthing system also includes lightning protection device ground connection row, this lightning protection device ground connection row is installed in the position near described lightning protection device, the earth connection of described lightning protection device, the earth connection of power consumption equipment and this lightning protection device ground connection row are electrically connected, and are connected on described total ground connection row.
Certainly, this lightning protection earthing system can also include power consumption equipment ground connection row, this power consumption equipment ground connection row is installed in the position near described power consumption equipment, the earth connection of described power consumption equipment and this power consumption equipment ground connection row are electrically connected, the earth connection of described lightning protection device and this lightning protection device ground connection row are electrically connected, and are connected on described total ground connection row.
Lightning protection earthing system of the present invention, the relative common reference point of its lightning protection device SPD and power consumption equipment is on described lightning protection device ground connection row.When lightning current is come in from the outside, a residual voltage value U (this residual voltage is that power consumption equipment can bear) can appear in the lightning protection device SPD lightning current of releasing on the lightning protection device SPD, directly be added on the power port of power consumption equipment, power consumption equipment can bear this voltage, so equipment can not damage.The connecting line that this moment, power consumption equipment was received lightning protection device ground connection row plays the equipotential effect, is the relative common reference point of lightning protection device SPD and power consumption equipment.And the earth connection of lightning protection device SPD is very little to the extra residual voltage that the power consumption equipment that needs protection brings, and can effectively guarantee the safety of power consumption equipment, adopts lightning protection earthing system of the present invention, can greatly reduce the situation because of be struck by lightning former thereby damage equipment.
Description of drawings
Fig. 1 is the system architecture schematic diagram of lightning protection earthing system in the prior art;
Fig. 2 is the system architecture schematic diagram of embodiment of the invention lightning protection earthing system;
Fig. 3 is the system architecture schematic diagram of the embodiment of the invention one;
Fig. 4 is the system architecture schematic diagram of the embodiment of the invention two.
Specific implementation
Be illustrated in figure 2 as the system architecture schematic diagram of embodiment of the invention lightning protection earthing system, it includes lightning protection device SPD 11, AC electric equipment 12 and total ground connection row 13, wherein: the distinguishing characteristics of the embodiment of the invention and prior art maximum is: this lightning protection earthing system also includes lightning protection device ground connection row 14, the position that this lightning protection device ground connection row 14 is installed near described lightning protection device SPD 11, the earth connection L1 of described lightning protection device SPD, the earth connection L2 of power consumption equipment and this lightning protection device ground connection row 14 are electrically connected, and are connected on described total ground connection row 13 by earth connection L3.
Suppose near lightning protection device SPD 11, (to be no more than 0.5 meter) and be provided with lightning protection device ground connection row A, lightning protection device SPD 11 and lightning protection device ground connection row 14 are placed in the casing, can be described as lightning protection box, and described earth connection L1, L2, L3 are cable.Like this, the described lightning protection earthing system of the embodiment of the invention, the relative common reference point of its lightning protection device SPD11 and power consumption equipment 12 is on described lightning protection device ground connection row 14.
When lightning current is come in from the outside, on the one hand, the lightning protection device SPD11 lightning current of releasing, a residual voltage value U (this residual voltage is that power consumption equipment can bear) can appear on the lightning protection device SPD11, directly be added on the power port of power consumption equipment 12, the connecting line L2 that this moment, power consumption equipment 12 was received lightning protection device ground connection row 14 plays the equipotential effect, is the relative common reference point of lightning protection device SPD11 and power consumption equipment 12; And on the other hand, the earth connection of lightning protection device SPD11 is very little to the extra residual voltage that the power consumption equipment that needs protection brings, and can effectively guarantee the safety of power consumption equipment, and therefore, what power consumption equipment 12 mainly bore is this voltage U, thereby equipment can not damage.Adopt lightning protection earthing system of the present invention, can greatly reduce situation because of be struck by lightning former thereby damage equipment.
Embodiment one
As shown in Figure 3, be subjected to lightning protection device SPD11 protection power consumption equipment 121,122 ..., 12N has a plurality ofly, the protective earthing line of these power consumption equipments is all received near the lightning protection device SPD11 the lightning protection device ground connection row 14.
Embodiment two
As shown in Figure 4; be subjected to lightning protection device SPD11 protection power consumption equipment 121,122 ..., 12N; protective earthing line L2 with these power consumption equipments receives near the power consumption equipment ground connection row 15 earlier; draw a cable from this power consumption equipment ground connection row 15 again and receive near the lightning protection device SPD11 the lightning protection device ground connection row 14, other are with embodiment one.
The lightning protection connected system of the embodiment of the invention one and embodiment two described a kind of AC electric equipment; the protective earthing line L2 that is characterized in power consumption equipment 12 arranges 13 according to total ground connection that common mode is directly received in the building; but it is received near the lightning protection device SPD11 the lightning protection device ground connection row 14, draw a cable from this lightning protection device ground connection row 14 again and receive on total ground connection row 13 of building.This lightning protection connected system makes lightning protection device ground connection row 14 become the relative common reference point of lightning protection device SPD11 and power consumption equipment 12, reaches equipotential effect, guarantees that lightning protection device SPD11 plays the most effective protective effect to power consumption equipment 12.
Claims (5)
1, a kind of lightning protection earthing system includes lightning protection device, power consumption equipment and total ground connection row, it is characterized in that:
This lightning protection earthing system also includes lightning protection device ground connection row, this lightning protection device ground connection row is installed in the position near described lightning protection device, the earth connection of described lightning protection device, the earth connection of power consumption equipment and this lightning protection device ground connection row are electrically connected, and are connected on described total ground connection row.
2, a kind of lightning protection earthing system as claimed in claim 1, it is characterized in that, this lightning protection earthing system also includes power consumption equipment ground connection row, this power consumption equipment ground connection row is installed in the position near described power consumption equipment, the earth connection of described power consumption equipment and this power consumption equipment ground connection row are electrically connected, the earth connection of described lightning protection device and this lightning protection device ground connection row are electrically connected, and are connected on described total ground connection row.
3, a kind of lightning protection earthing system as claimed in claim 1 or 2 is characterized in that, described lightning protection device and lightning protection device ground connection are emitted on a casing, promptly in the lightning protection box.
4, any lightning protection earthing system as claimed in claim 1 or 2 is characterized in that, described being electrically connected is meant by cable and carries out good being electrically connected.
5, a kind of lightning protection earthing system as claimed in claim 3 is characterized in that, described being electrically connected is meant by cable and carries out good being electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310120072 CN1625013A (en) | 2003-12-03 | 2003-12-03 | Lingtning-protection grounding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310120072 CN1625013A (en) | 2003-12-03 | 2003-12-03 | Lingtning-protection grounding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1625013A true CN1625013A (en) | 2005-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310120072 Pending CN1625013A (en) | 2003-12-03 | 2003-12-03 | Lingtning-protection grounding system |
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| CN (1) | CN1625013A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685955B (en) * | 2008-09-27 | 2011-11-02 | 中国移动通信集团湖南有限公司 | Base station lightning protection system |
| CN104242008A (en) * | 2014-09-26 | 2014-12-24 | 中讯邮电咨询设计院有限公司 | Half-floating-ground lightning protection grounding method for small LTE (long term evolution) distributed base station |
| CN104242006A (en) * | 2014-09-26 | 2014-12-24 | 中讯邮电咨询设计院有限公司 | Full-floating-ground lightning protection grounding method for small base station under unexposed environment |
| CN104269834A (en) * | 2014-08-18 | 2015-01-07 | 山东华普信息科技有限公司 | Low-pulse surge protection device |
| CN104601009A (en) * | 2015-01-14 | 2015-05-06 | 中国联合网络通信集团有限公司 | Power supply system based on small base station |
-
2003
- 2003-12-03 CN CN 200310120072 patent/CN1625013A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685955B (en) * | 2008-09-27 | 2011-11-02 | 中国移动通信集团湖南有限公司 | Base station lightning protection system |
| CN104269834A (en) * | 2014-08-18 | 2015-01-07 | 山东华普信息科技有限公司 | Low-pulse surge protection device |
| CN104242008A (en) * | 2014-09-26 | 2014-12-24 | 中讯邮电咨询设计院有限公司 | Half-floating-ground lightning protection grounding method for small LTE (long term evolution) distributed base station |
| CN104242006A (en) * | 2014-09-26 | 2014-12-24 | 中讯邮电咨询设计院有限公司 | Full-floating-ground lightning protection grounding method for small base station under unexposed environment |
| CN104242008B (en) * | 2014-09-26 | 2016-05-18 | 中讯邮电咨询设计院有限公司 | Small-sized LTE distributed base station half floating ground lightning protection method |
| CN104242006B (en) * | 2014-09-26 | 2017-01-25 | 中讯邮电咨询设计院有限公司 | Full-floating-ground lightning protection grounding method for small base station under unexposed environment |
| CN104601009A (en) * | 2015-01-14 | 2015-05-06 | 中国联合网络通信集团有限公司 | Power supply system based on small base station |
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