CN106786326A - A kind of lightning protection device - Google Patents
A kind of lightning protection device Download PDFInfo
- Publication number
- CN106786326A CN106786326A CN201510835671.4A CN201510835671A CN106786326A CN 106786326 A CN106786326 A CN 106786326A CN 201510835671 A CN201510835671 A CN 201510835671A CN 106786326 A CN106786326 A CN 106786326A
- Authority
- CN
- China
- Prior art keywords
- lightning
- port
- thermistor
- circuit
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/40—Connection to earth
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention is used and is related to a kind of lightning protection device, including base, enclosing cover and lightning-protection module, lightning-protection module is arranged on base, the lightning-protection module includes gas-discharge tube, first thermistor, second thermistor, first line and the second circuit, described first, second thermistor is separately positioned in first line and the second circuit, the first line includes the first incoming end and the first output end, second circuit includes the second incoming end and the second output end, the gas-discharge tube includes first port, second port and the 3rd port, the first port accesses the circuit between the first incoming end and the first thermistor, the second port accesses the circuit between the second incoming end and the second thermistor, the 3rd port ground connection, described first, second port is parallel with overtemperature protection module.The present invention is prevented from being damaged when electrical equipment is struck by lightning, while preventing destruction of the induced-current after thunderbolt to circuit.
Description
Technical field
The present invention relates to a kind of lightning protection device.
Background technology
The effect of lightning protection device be in protecting power system various electric equipments from lightning surge, behaviour
Make a kind of electrical equipment that overvoltage, Frequency Transient Overvoltage are impacted and damaged.In the prior art, common lightning protection
Device is the element by setting metal oxide varistor (Metal Oxide Varistor, MOV), is used
To shift unnecessary voltage.MOV links together live wire and ground wire.MOV is made up of three parts：Centre is
A piece metal oxide materials, power supply and ground wire are connected to by two semiconductors.These semiconductors have with
Voltage change and the variable resistor that changes.When voltage is less than certain particular value, the electron motion in semiconductor
High resistance will be produced.Conversely, when voltage exceedes the particular value, electron motion can change, half
Conductor resistance can be greatly reduced.If voltage is normal, MOV can idle and leisurely one side.And when overtension, MOV
Unnecessary voltage can be eliminated with conduct significant current.But the failure of MOV lightning arresters has short circuit and open circuit two
Kind of form, powerful lightning current may break lightning arrester, form open fault, at this moment thunder-arresting module
Profile is often destroyed.Lightning arrester is likely to the operation voltage because time long material is aging and declines, when dynamic
When the level of line operating voltages is dropped below as voltage, lightning arrester is increased by alternating current, is taken shelter from the thunder
Device generates heat, and eventually destroys the nonlinear characteristic of MOV devices, causes arrester partial short circuit to burn.
The content of the invention
The present invention is in order to solve problem of the prior art, there is provided one kind is prevented effectively from electrical equipment and is struck by lightning
When impaired lightning protection device.
To achieve the above object, the present invention uses following technical scheme：A kind of lightning protection device, including base,
Enclosing cover and lightning-protection module, the lightning-protection module are arranged on base, and the lightning-protection module includes gas-discharge tube,
First thermistor, the second thermistor, first line and the second circuit, the first, second temperature-sensitive electricity
Resistance is separately positioned in first line and the second circuit, and the first line is defeated including the first incoming end and first
Go out end, second circuit includes the second incoming end and the second output end, and the gas-discharge tube includes first
Port, second port and the 3rd port, the first port access the first incoming end and the first thermistor it
Between circuit, the second port accesses the circuit between the second incoming end and the second thermistor, described the
Three ports are grounded, and first, second port is parallel with overtemperature protection module.
It is below attached technical scheme of the invention.
The base is provided with fixed mount and earth plate, and the lightning-protection module is arranged on fixed mount, and is passed through
With earth plate be connected ground wire by bolt.
The base is provided with supporting part, and the enclosing cover can be set on base and be supported on supporting part, bottom
Airtight connection between seat and enclosing cover.
First thermistor and the second thermistor are semistor.
Inert gas is provided with the gas-discharge tube.
Technique effect of the invention：Lightning protection device of the invention is prevented from being damaged when electrical equipment is struck by lightning,
Destruction of the induced-current after thunderbolt to circuit is prevented simultaneously；Additionally, being caused by setting base and enclosing cover
Lightning protection device can be conveniently replaceable installation, influence of the isolation outside moisture to electric elements inside.
Brief description of the drawings
Fig. 1 is the schematic diagram of the lightning protection device of the embodiment of the present invention.
Fig. 2 is the circuit diagram of the lightning-protection module of the embodiment of the present invention.
Specific embodiment
Below, substantive distinguishing features of the invention and advantage are further described with reference to example, but the present invention
It is not limited to listed embodiment.
As depicted in figs. 1 and 2, the lightning protection device of the present embodiment includes base 1, enclosing cover 2 and lightning-protection module 3,
The lightning-protection module 3 is arranged on base 1, circuit when lightning-protection module 3 can avoid electrical equipment from being struck by lightning
Overload and damage.The lightning-protection module 3 includes gas-discharge tube 33, the first thermistor 31, the second temperature-sensitive
Resistance 32, the circuit 35 of first line 34 and second.Described, the second thermistor 31,32 sets respectively
Put in the circuit 35 of first line 34 and second, first, second circuit 34,35 is for connecting lightning protection dress
Put the electric equipment of both sides.The first line 34 includes the first incoming end L1 and the first output end I1, institute
Stating the second circuit 35 includes the second incoming end L2 and the second output end I2, and the gas-discharge tube 33 includes the
Single port a, second port b and the 3rd port c, the first port a access the first incoming end L1 and the
Circuit between one thermistor 31, the second port b accesses the second incoming end L2 and the second temperature-sensitive electricity
Circuit between resistance 32, the 3rd port c is connected with ground wire 4.When electrical equipment is subjected to thunderbolt,
Gas-discharge tube 33 forms low resistance state between causing first, second incoming end L1, L2 and the 3rd port c,
So that thunder and lightning are imported into ground；Then, when abnormal current or lightning induction electric current is produced, first, the
Two thermistors 31,32 cause temperature to rise due to flowing through its electric current increase, so that first, second heat
Quick resistance 31,32 forms high resistance, so as to reduce influence of the lightning induction electric current to circuit.When thunderbolt disappears
Afterwards, uprising gas discharge tube 33, the first thermistor 31 and the second thermistor 32 can be returned to initially
State.First, second port is parallel with overtemperature protection module 5.If so that thunderbolt continues or lightning induction
Electric current cannot disappear within the short time (generally a few minutes), then overtemperature protection module 5 can directly by first,
Second incoming end L1, L2 open circuits, burn so as to avoid continuous discharge from causing gas-discharge tube 33 to produce high temperature
Ruin.
As depicted in figs. 1 and 2, further, the base 1 is provided with fixed mount 11 and earth plate 12,
The lightning-protection module 3 is arranged on fixed mount 11, and is connected ground wire 14 with earth plate 12 by bolt 13
Connect so that ground wire 14 can firmly be connected with earth plate 12, lightning-protection module is easy to by setting fixed mount 11
3 are connected with base 1.The base 11 is provided with supporting part 111, and the enclosing cover 2 can be set in base 11
Go up and be supported on supporting part 111, airtight connection between base 1 and enclosing cover 2, by base 1 and enclosing cover 2
Between airtight connection so that lightning protection device may be provided at humid area.First thermistor 31 and
Two thermistors 32 are semistor, so as to being raised with temperature and increasing resistance.
Inert gas is provided with the gas-discharge tube 33, when being struck by lightning, gas-discharge tube 33 is breakdown,
So as to release current.
The lightning protection device of the present embodiment is prevented from being damaged when electrical equipment is struck by lightning, while preventing from being struck by lightning
Destruction of the induced-current afterwards to circuit；Additionally, enabling lightning protection device just by setting base and enclosing cover
Installed in changing, influence of the isolation outside moisture to electric elements inside.The above is only of the invention excellent
Select implementation method, it is noted that for those skilled in the art, do not depart from this hair
On the premise of bright principle, some improvements and modifications can also be made, these improvements and modifications also should be regarded as this hair
Bright protection domain.
Claims (5)
1. a kind of lightning protection device, including base, enclosing cover and lightning-protection module, the lightning-protection module are arranged on base
On, it is characterised in that：The lightning-protection module includes gas-discharge tube, the first thermistor, the second temperature-sensitive electricity
Resistance, first line and the second circuit, first, second thermistor is separately positioned on first line and the
In two circuits, the first line includes the first incoming end and the first output end, and second circuit includes the
Two incoming ends and the second output end, the gas-discharge tube include first port, second port and the 3rd port,
The first port accesses the circuit between the first incoming end and the first thermistor, and the second port is accessed
Circuit between second incoming end and the second thermistor, the 3rd port ground connection, described first, second
Port is parallel with overtemperature protection module.
2. lightning protection device as claimed in claim 1, it is characterised in that：The base be provided with fixed mount and
Earth plate, the lightning-protection module is arranged on fixed mount, and ground wire is connected with earth plate by bolt.
3. lightning protection device as claimed in claim 2, it is characterised in that：The base is provided with supporting part,
The enclosing cover can be set on base and be supported on supporting part, airtight connection between base and enclosing cover.
4. the lightning protection device as described in any claim in claims 1 to 3, it is characterised in that：It is described
First thermistor and the second thermistor are semistor.
5. lightning protection device as claimed in claim 4, it is characterised in that：It is provided with lazy in the gas-discharge tube
Property gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510835671.4A CN106786326A (en) | 2015-11-24 | 2015-11-24 | A kind of lightning protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510835671.4A CN106786326A (en) | 2015-11-24 | 2015-11-24 | A kind of lightning protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106786326A true CN106786326A (en) | 2017-05-31 |
Family
ID=58965020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510835671.4A Pending CN106786326A (en) | 2015-11-24 | 2015-11-24 | A kind of lightning protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106786326A (en) |
-
2015
- 2015-11-24 CN CN201510835671.4A patent/CN106786326A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170531 |