CN106899013A - A kind of surge protective device suitable for outdoor communication line - Google Patents
A kind of surge protective device suitable for outdoor communication line Download PDFInfo
- Publication number
- CN106899013A CN106899013A CN201710145117.2A CN201710145117A CN106899013A CN 106899013 A CN106899013 A CN 106899013A CN 201710145117 A CN201710145117 A CN 201710145117A CN 106899013 A CN106899013 A CN 106899013A
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- China
- Prior art keywords
- lightning protection
- connection
- thermistor
- inductor
- terminals
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- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/026—Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/06—Frequency selective two-port networks including resistors
- H03H7/07—Bridged T-filters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of surge protective device suitable for outdoor communication line, including one-level lightning protection circuit, two grades of lightning protection circuits and three-level lightning protection circuit, the one-level lightning protection circuit realizes that the connected mode of two grades of lightning protection circuits is using gas-discharge tube：It is connected in the A wiring of connection after first inductor and the series connection of the first thermistor, is connected in the B wiring of connection after the second inductor and the series connection of the second thermistor；The connected mode of the three-level lightning protection circuit is：Four commutation diode connection composition bridge rectifiers, two input terminals of bridge rectifier are connected across between connection A terminals and B terminals, and Transient Suppression Diode is connected between two lead-out terminals of bridge rectifier.During lightening strikes are suppressed, with the sufficiently fast response time, anti-electromagnetic interference capability is strong, and ensures that component itself stands intact, it is ensured that communicating terminal is in thunderstorm season safe and stable operation for the present invention.
Description
Technical field
The invention belongs to lightning-protection engineering field, and in particular to a kind of surge protection dress suitable for outdoor communication line
Put.
Background technology
The systems such as intelligent electric meter have been widely applied to the field of industry and life.Automatic data logging skill is used in ammeter
Art reads data by COM1, and most of situation uses remote reading mode, and remote reading mode should for ammeter
The not only safe but also time-consuming and money for, realizes that the key of the technology is to ensure that communication line is safe and reliable.But connection
Open air is commonly exposed to, therefore easily because the reason such as thunderbolt introduces overvoltage.
State Intellectual Property Office of the People's Republic of China discloses a kind of communication line thunder prevention device, Publication No.：
CN203707770U, date of publication is：2014.07.09, the communication line thunder prevention device is provided with firsts and seconds two-stage lightning protection circuit, one
Level lightning protection circuit realizes that two grades of lightning protection circuits are realized using TVS anti-thunder tubes using TED485 anti-thunder tubes, wherein, FL is TED485
Anti-thunder tube, TS is TVS anti-thunder tubes, and its annexation is：TED485 anti-thunder tube FL1, TED485 anti-thunder tube FL2, TVS anti-thunder tubes
The positive pole of TS1 and TVS anti-thunder tubes TS3 connects and is grounded, TED485 anti-thunder tube FL1, TVS anti-thunder tube TS1 negative poles and TVS anti-thunder tubes
The positive pole of TS2 is mutually connected in 485A terminals, the negative pole phase of TVS anti-thunder tube TS2, TVS anti-thunder tube TS3 and TED485 anti-thunder tubes FL2
It is connected in 485B terminals；The patent accesses RS-485 bus modes using in parallel, only lightning-protection module need to be connected on into RS-485 terminals
It is upper, centralized automatic meter-reading terminal called and load-carrying ability are not influenceed, it is ensured that terminal in thunderstorm season safe and stable operation, but
It is that the communication line thunder prevention device anti-electromagnetic interference capability of the patent is not strong, and has much room for improvement in response speed.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of surge suitable for outdoor communication line is protected
Protection unit, including one-level lightning protection circuit, two grades of lightning protection circuits and three-level lightning protection circuit, when being struck by lightning, induced overvoltage
Introduced by the two ends of connection, used as one-level lightning protection circuit, lightning surge is weakened severely to hectovolt gas-discharge tube GDT；
Thermistor PPTC responses in microsecond (μ s) rank, are further suppressed to surge current in two grades of lightning protection circuits, and
Inductor and capacitor bank coordinate into filter circuit and thermistor PPTC, and two grades of lightning protection are improved while surge current is suppressed
The anti-electromagnetic interference capability of circuit；Bridge rectifier carries out rectification to the overvoltage of prime in three-level lightning protection circuit, and prevents
Transient Suppression Diode is breakdown, and Transient Suppression Diode is responded in psec (ps) rank, and voltage clamping is left in 8V
The right side, and realize the common mode to rear end equipment and differential mode protective effect.Surge protective device of the invention is suppressing lightening strikes mistake
Cheng Zhong, with the sufficiently fast response time, and ensures that component itself stands intact, it is ensured that communicating terminal is in thunderstorm season safety
Stable operation.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of surge protective device suitable for outdoor communication line, including one-level lightning protection circuit, two grades of lightning protection circuits and
Three-level lightning protection circuit, the one-level lightning protection circuit realizes that gas-discharge tube GDT is connected across connection using gas-discharge tube GDT
A terminals and B terminals between, two grades of lightning protection circuits include the first thermistor PPTC1, the second thermistor
Connected after PPTC2, the first inductor L1, the second inductor L2, the first inductor L1 and the first thermistor PPTC1 series connection
In the A wiring of connection, it is connected in the B wiring of connection after the second inductor L2 and the second thermistor PPTC2 series connection,
And first inductor L1 and the second inductor L2 be grounded by the first capacitor C1 and the second capacitor C2 respectively；The three-level is prevented
Thunder and lightning route diode and Transient Suppression Diode is constituted, and its connected mode is：Four commutation diode connection composition bridge-types are whole
Current circuit, two input terminals of bridge rectifier are connected across between connection A terminals and B terminals；Transient state suppresses two
Pole pipe TVS is connected between two lead-out terminals of bridge rectifier, and the two ends of Transient Suppression Diode TVS pass through respectively
One commutation diode ground connection.
Preferably, the gas-discharge tube GDT is three-stage ceramic gas-discharge tube, its model 3R097CXA.
Preferably, the first thermistor PPTC1 and the second thermistor PPTC2 are high molecular positive temp temperature-sensitive electricity
Resistance, its model KRG060.
Preferably, the Transient Suppression Diode TVS is bipolarity Transient Suppression Diode, its model SM6T6V8A.
Preferably, the commutation diode is fast recovery diode, from model MURS120T3.
Compared with prior art, beneficial effects of the present invention are：The present invention includes one-level lightning protection circuit, two grades of lightning protection circuits
And three-level lightning protection circuit, when being struck by lightning, induced overvoltage is introduced by the two ends of connection, gas-discharge tube GDT conducts
One-level lightning protection circuit, lightning surge is weakened severely to hectovolt；Thermistor PPTC is at microsecond (μ s) in two grades of lightning protection circuits
Response, is further suppressed to surge current in rank, and inductor and capacitor bank are into filter circuit and thermistor
PPTC coordinates, and two grades of anti-electromagnetic interference capabilities of lightning protection circuit are improved while surge current is suppressed；In three-level lightning protection circuit
Bridge rectifier carries out rectification to the overvoltage of prime, and prevents Transient Suppression Diode breakdown, Transient Suppression Diode
Responded in psec (ps) rank, by voltage clamping in 8V or so, and realized common mode and the differential mode protection to rear end equipment
Effect.Surge protective device of the invention suppress lightening strikes during, with sufficiently fast response time, electromagnetism interference
Ability is strong, and ensures that component itself stands intact, it is ensured that communicating terminal is in thunderstorm season safe and stable operation.
Brief description of the drawings
Fig. 1 is system block diagram of the invention.
Fig. 2 is integrated circuit figure of the invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
With reference to the accompanying drawings 1 and accompanying drawing 2 shown in, a kind of surge protective device suitable for outdoor communication line, including one-level lightning protection
Circuit, two grades of lightning protection circuits and three-level lightning protection circuit, the one-level lightning protection circuit is using gas-discharge tube GDT realizations, two grades
Lightning protection circuit realizes that three-level lightning protection circuit uses Transient Suppression Diode and bridge rectifier using thermistor and inductor
Realize.
In the present embodiment, gas-discharge tube GDT is three-stage ceramic gas-discharge tube from model 3R097CXA, and gas is put
Fulgurite GDT is connected across between connection A terminals and B terminals, and when there are lightening strikes, induced overvoltage is by connection two
End is introduced, and by gas-discharge tube GDT, overvoltage is weakened severely to hectovolt.
Thermistor PPTC from model KRG060 high molecular positive temp thermistor, the first inductor L1 and the
It is connected in the A wiring of connection after one thermistor PPTC1 series connection, the second inductor L2 and the second thermistor PPTC2 goes here and there
Be connected to after connection in the B wiring of connection, and the first inductor L1 and the second inductor L2 respectively by the first capacitor C1 and
Second capacitor C2 is grounded；Thermistor PPTC responses in microsecond (μ s) rank, are further suppressed to surge current,
And inductor and capacitor bank coordinate into filter circuit and thermistor, two grades of thunder-lightnings are improved while surge current is suppressed
The anti-electromagnetic interference capability on road.
Four commutation diode D1~D4 connection composition bridge rectifiers, two input terminals of bridge rectifier across
It is connected between connection A terminals and B terminals；Transient Suppression Diode TVS is connected to two outputs of bridge rectifier
Between terminal, and the two ends of Transient Suppression Diode TVS are grounded by commutation diode D5, D6 respectively；Transient Suppression Diode
TVS selects the bipolarity Transient Suppression Diode of model SM6T6V8A, and commutation diode is fast from model MURS120T3's
Recovery diode.Bridge rectifier carries out rectification to the overvoltage of prime, and prevents Transient Suppression Diode TVS breakdown,
Transient Suppression Diode TVS is responded in psec (ps) rank, by voltage clamping in 8V or so, is realized to rear end equipment
Common mode and differential mode protective effect.
Component of the present invention is few, simple structure, low cost, and anti-electromagnetic interference capability is strong, during lightening strikes are suppressed,
With the sufficiently fast response time, anti-electromagnetic interference capability is strong, and ensures that component itself stands intact, it is ensured that communicating terminal exists
Thunderstorm season safe and stable operation.
Above-described embodiment is only the preferred embodiments of the present invention, not limiting the scope of the invention, as long as using
Design principle of the invention, and the change for carrying out non-creativeness work on this basis and making, all should belong to of the invention
Within protection domain.
Claims (5)
1. a kind of surge protective device suitable for outdoor communication line, including one-level lightning protection circuit, two grades of lightning protection circuits and three
Level lightning protection circuit, the one-level lightning protection circuit realizes that gas-discharge tube (GDT) is connected across communication using gas-discharge tube (GDT)
Between the A terminals and B terminals of line, it is characterised in that：Two grades of lightning protection circuits include the first thermistor (PPTC1),
Second thermistor (PPTC2), the first inductor (L1), the second inductor (L2), first inductor (L1) and the first heat
It is connected in the A wiring of connection after the series connection of quick resistance (PPTC1), the second inductor (L2) and the second thermistor (PPTC2)
It is connected to after series connection in the B wiring of connection, and the first inductor (L1) and the second inductor (L2) pass through the first electric capacity respectively
Device (C1) and the second capacitor (C2) are grounded；The three-level lightning protection circuit is made up of commutation diode and Transient Suppression Diode,
Its connected mode is：Four commutation diodes connection composition bridge rectifiers, two input terminals of bridge rectifier across
It is connected between connection A terminals and B terminals；Transient Suppression Diode (TVS) be connected to bridge rectifier two are defeated
Go out between terminal, and the two ends of Transient Suppression Diode (TVS) are grounded by a commutation diode respectively.
2. a kind of surge protective device suitable for outdoor communication line according to claim 1, it is characterised in that：The gas
Body discharge tube (GDT) is three-stage ceramic gas-discharge tube, its model 3R097CXA.
3. a kind of surge protective device suitable for outdoor communication line according to claim 1, it is characterised in that：Described
One thermistor (PPTC1) and the second thermistor (PPTC2) are high molecular positive temp thermistor, its model KRG060.
4. a kind of surge protective device suitable for outdoor communication line according to claim 1, it is characterised in that：The wink
It is bipolarity Transient Suppression Diode, its model SM6T6V8A that state suppresses diode TVS.
5. a kind of surge protective device suitable for outdoor communication line according to claim 1, it is characterised in that：It is described whole
Stream diode is fast recovery diode, from model MURS120T3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710145117.2A CN106899013A (en) | 2017-03-13 | 2017-03-13 | A kind of surge protective device suitable for outdoor communication line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710145117.2A CN106899013A (en) | 2017-03-13 | 2017-03-13 | A kind of surge protective device suitable for outdoor communication line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106899013A true CN106899013A (en) | 2017-06-27 |
Family
ID=59192336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710145117.2A Pending CN106899013A (en) | 2017-03-13 | 2017-03-13 | A kind of surge protective device suitable for outdoor communication line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106899013A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211550A (en) * | 2020-01-13 | 2020-05-29 | 杭州迪普科技股份有限公司 | Protection circuit |
| CN111404610A (en) * | 2020-03-24 | 2020-07-10 | 中航光电科技股份有限公司 | Remote system of satellite navigation signal |
| CN117477772A (en) * | 2023-10-27 | 2024-01-30 | 润加物业服务(深圳)有限公司 | Intelligent control and management service system for power equipment |
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| CN201018518Y (en) * | 2007-02-12 | 2008-02-06 | 赵福江 | Ethernet power supply overvoltage protector |
| CN204190381U (en) * | 2014-12-03 | 2015-03-04 | 国家电网公司 | A kind of antisurge interference prevention device based on power meter reading system |
| CN104485654A (en) * | 2014-12-29 | 2015-04-01 | 李银龙 | Novel lightning protection circuit for intelligent ammeter |
| US20150326006A1 (en) * | 2012-06-28 | 2015-11-12 | Zte Corporation | Protection circuit of communication interface |
| CN204967612U (en) * | 2015-08-04 | 2016-01-13 | 上海利德电器工业有限公司 | Electromagnetic interference resistance's power supply circuit |
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2017
- 2017-03-13 CN CN201710145117.2A patent/CN106899013A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201018518Y (en) * | 2007-02-12 | 2008-02-06 | 赵福江 | Ethernet power supply overvoltage protector |
| US20150326006A1 (en) * | 2012-06-28 | 2015-11-12 | Zte Corporation | Protection circuit of communication interface |
| CN204190381U (en) * | 2014-12-03 | 2015-03-04 | 国家电网公司 | A kind of antisurge interference prevention device based on power meter reading system |
| CN104485654A (en) * | 2014-12-29 | 2015-04-01 | 李银龙 | Novel lightning protection circuit for intelligent ammeter |
| CN204967612U (en) * | 2015-08-04 | 2016-01-13 | 上海利德电器工业有限公司 | Electromagnetic interference resistance's power supply circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211550A (en) * | 2020-01-13 | 2020-05-29 | 杭州迪普科技股份有限公司 | Protection circuit |
| CN111404610A (en) * | 2020-03-24 | 2020-07-10 | 中航光电科技股份有限公司 | Remote system of satellite navigation signal |
| CN117477772A (en) * | 2023-10-27 | 2024-01-30 | 润加物业服务(深圳)有限公司 | Intelligent control and management service system for power equipment |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170627 |
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| RJ01 | Rejection of invention patent application after publication |