CN207184045U - For under strong thunder and lightning multiple-pulse environment and preventing the distribution box of lightning protection device catching fire - Google Patents
For under strong thunder and lightning multiple-pulse environment and preventing the distribution box of lightning protection device catching fire Download PDFInfo
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- CN207184045U CN207184045U CN201721143311.9U CN201721143311U CN207184045U CN 207184045 U CN207184045 U CN 207184045U CN 201721143311 U CN201721143311 U CN 201721143311U CN 207184045 U CN207184045 U CN 207184045U
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- protection device
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- lightning protection
- power input
- master switch
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- 230000005611 electricity Effects 0.000 claims abstract description 11
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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Abstract
The utility model discloses a kind of distribution box for being used under strong thunder and lightning multiple-pulse environment and preventing lightning protection device catching fire, including power input master switch and the distributing box with electricity output branch road are provided with, each with having air switch of being connected respectively on electricity output branch road；It is electrically connected in power input master switch end of incoming cables by the series arm being made up of back-up protection device and lightning protection device, maximum discharge current >=40kA of lightning protection device；Power input master switch leading-out terminal moves back the μ H of even inductance L inductance value >=15 by moving back even inductance L and each end of incoming cables electrical connection with electricity output branch road.The utility model advantage is to be electrically connected by the series arm being made up of back-up protection device, lightning protection device in power input master switch end of incoming cables; back-up protection utensil has tolerance thunderbolt ability strong; thunder and lightning tolerance is 40 ~ 100 kA in the case of 8/20 μ S lightning currents, and avoiding air switch tripping operation when by≤20kA lightning currents causes lightning protection device to lose protective effect problem.
Description
Technical field
Mobile communication electric power system is the utility model is related to, is especially under strong thunder and lightning multiple-pulse environment and prevents
The distribution box of lightning protection device catching fire.
Background technology
The various types of communication base station of operator at present, particularly small base station, which are much built in, is subject to thunderbolt or supply voltage
Unstable area, it is the supporting distribution box of these base station electric power systems, typically in each phase of AC power inlet wire master switch leading-out terminal
Air switch front end on line is in series with lightning protection device, to ensure safety of the base station in thunderbolt.But due to the thunder of air switch
Electric tolerance is generally no greater than 20kA in the case of 8/20 μ S lightning currents, and this is allowed for when lightning current is resistant to more than its thunder and lightning
During ability, air switch just trips disconnection, causes to be resistant to the very strong lightning protection device of thunder and lightning ability（Such as thunder and lightning tolerance
40 ~ 100 kA lightning protection device）The due protective effect that can not be risen.In addition, when earth fault occurs for electric power system, due to each
The air switch that class reason may prevent to be connected on lightning protection device front end is from departing from, when the voltage for being applied to lightning protection device is higher than lightning protection device
Operating voltage when, or due to other reasons will cause lightning protection device burning it is on fire.In above-mentioned two situations so that the peace of base station
It cannot ensure entirely, the lighter causes communication disruption, causes base station that fire occurs when serious.
In order to reduce surge current by the thunder and lightning residual voltage after first order lightning protection device, two-port series connection lightning protection is used in base station
Device is best guard method, but due to involving great expense without being widely used.
The content of the invention
The utility model purpose is that providing one kind is used under strong thunder and lightning multiple-pulse environment and prevents lightning protection device catching fire
Distribution box.
To achieve the above object, the utility model takes following technical proposals：
The distribution box described in the utility model for being used under strong thunder and lightning multiple-pulse environment and preventing lightning protection device catching fire, including
Power input master switch and the distributing box with electricity output branch road are provided with, it is each described with being in series with respectively on electricity output branch road
Air switch；It is electrically connected in the power input master switch end of incoming cables by the series connection branch being made up of back-up protection device and lightning protection device
Road, maximum discharge current >=40kA of the lightning protection device；Power input master switch leading-out terminal is by moving back even inductance L and each distribution
Export the end of incoming cables electrical connection of branch road, the μ H of inductance value >=15 for moving back even inductance L.
The utility model advantage is have by back-up protection device in the power input master switch end of incoming cables, electrical connection
(SCB) and lightning protection device (SPD) composition series arm, back-up protection utensil have tolerance thunderbolt ability it is strong, in 8/20 μ S lightning currents
In the case of thunder and lightning tolerance be 40 ~ 100 kA, therefore avoid air switch when by≤20kA lightning current, due to
Tripped more than its bearing capacity the problem of causing lightning protection device to lose protective effect.Meanwhile earth fault is occurring for electric power system
And during low current of the power current more than 3A, back-up protection device trips so that lightning protection device departs from current supply circuit, avoids
Air switch, which can not depart from, when earth fault occurs for electric power system causes lightning protection device burning problem on fire, reaches protection base station equipment
Purpose.In addition, another advantage of the utility model is to move back idol what power input master switch leading-out terminal was in series with >=15 μ H
Inductance L (requirement of maximum load current should be met by moving back the line footpath of even inductance L coils), so, is arranged on power input master switch
The lightning protection device of end of incoming cables and each lightning protection device carried by protection equipment, that is, form two-port lightning-protection system, thunder and lightning residual voltage dropped
It is extremely minimum, further function as anti-lightning strike effect；And the utility model is compared with prior art, eliminates and each match somebody with somebody electricity output branch
Road（Phase line）Set lightning protection device, save the manufacturing cost of distribution box.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
The distribution box described in the utility model for being used under strong thunder and lightning multiple-pulse environment and preventing lightning protection device catching fire, including
Alternating current 220V power input master switch 1 and the distributing box 3 with electricity output branch road 2 are provided with, each with 2 points on electricity output branch road
Chuan Lian not having air switch 4；In the end of incoming cables of alternating current 220V power input master switch 1, electrical connection has by back-up protection device 5 and prevented
The series arm 7 that thunder device 6 forms, maximum discharge current >=40kA of lightning protection device 6；The outlet of alternating current 220V power input master switch 1
The μ H of even inductance L inductance value >=15 are moved back by moving back even inductance L and each end of incoming cables electrical connection with electricity output branch road 2 in end.
The utility model can be used for the communication base station of single phase power supply, naturally it is also possible to the communication base for three phase supply
Stand.
Claims (1)
1. a kind of be used under strong thunder and lightning multiple-pulse environment and prevent the distribution box of lightning protection device catching fire, including to be provided with power supply defeated
Enter master switch and the distributing box with electricity output branch road, it is each described with having air switch of being connected respectively on electricity output branch road；Its
It is characterised by：It is electrically connected in the power input master switch end of incoming cables by the series connection branch being made up of back-up protection device and lightning protection device
Road, maximum discharge current >=40kA of the lightning protection device；Power input master switch leading-out terminal is by moving back even inductance L and each distribution
Export the end of incoming cables electrical connection of branch road, the μ H of inductance value >=15 for moving back even inductance L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721143311.9U CN207184045U (en) | 2017-09-07 | 2017-09-07 | For under strong thunder and lightning multiple-pulse environment and preventing the distribution box of lightning protection device catching fire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721143311.9U CN207184045U (en) | 2017-09-07 | 2017-09-07 | For under strong thunder and lightning multiple-pulse environment and preventing the distribution box of lightning protection device catching fire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207184045U true CN207184045U (en) | 2018-04-03 |
Family
ID=61743077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721143311.9U Active CN207184045U (en) | 2017-09-07 | 2017-09-07 | For under strong thunder and lightning multiple-pulse environment and preventing the distribution box of lightning protection device catching fire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207184045U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425513A (en) * | 2017-09-07 | 2017-12-01 | 深圳锦天乐防雷技术有限公司 | For under strong thunder and lightning multiple-pulse environment and preventing the distribution box of lightning protection device catching fire |
-
2017
- 2017-09-07 CN CN201721143311.9U patent/CN207184045U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425513A (en) * | 2017-09-07 | 2017-12-01 | 深圳锦天乐防雷技术有限公司 | For under strong thunder and lightning multiple-pulse environment and preventing the distribution box of lightning protection device catching fire |
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