CN207124454U - A kind of surge protection circuit - Google Patents
A kind of surge protection circuit Download PDFInfo
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- CN207124454U CN207124454U CN201721178057.6U CN201721178057U CN207124454U CN 207124454 U CN207124454 U CN 207124454U CN 201721178057 U CN201721178057 U CN 201721178057U CN 207124454 U CN207124454 U CN 207124454U
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- surge protection
- zero line
- piezo
- resistance
- protection circuit
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Abstract
The utility model discloses a kind of surge protection circuit.A kind of surge protection circuit; including power supply terminal; power supply terminal draws three live wires LI, L2, L3 and zero line N; every live wire L sets a piezo-resistance CNR and a safety electric capacity CX to be electrically connected with zero line N respectively; every live wire L is grounded by a Y capacitance, and zero line N is grounded by least one piezo-resistance CNR4, CNR5, passes through piezo-resistance CNR and safety electric capacity CX surge protection function; realize quickly with two kinds of protected modes at a slow speed, cleverly carry out surge protection.
Description
Technical field
Surge protection circuit field is the utility model is related to, more particularly to a kind of surge protection circuit.
Background technology
Surge protection circuit is the indispensable circuit module of circuit, by designing surge protection circuit, when electric loop or
Because when extraneous interference produces peak current or voltage suddenly in communication line, Surge Protector can be within the extremely short time
Conducting shunting, so as to avoid infringement of the surge to other equipment in loop.
Conventional surge protection circuit adds piezo-resistance between live wire and ground wire, but such design cost compared with
Greatly, and piezo-resistance type selecting is more difficult, and leakage current all the time at work be present, and service life is relatively low.
Utility model content
The purpose of this utility model is to provide a kind of higher service life, reliability, lower-cost surge protection circuit.
To achieve the above object, the utility model adopts the following technical scheme that, a kind of surge protection circuit, including power supply connect
Line terminals, power supply terminal draws three live wires LI, L2, L3 and zero line N, every live wire L set a piezo-resistance respectively
CNR and safety electric capacity CX is electrically connected with zero line N, and every live wire L is grounded by a Y capacitance.By piezo-resistance CNR and
Safety electric capacity CX surge protection function, realize quickly with two kinds of protected modes at a slow speed, cleverly carry out surge protection.
In some embodiments, zero line N is grounded by least one piezo-resistance CNR4, CNR5.Zero line N is set with ground wire
At least one piezo-resistance put, in normal mode of operation, voltage is substantially zeroed between zero line and ground wire, i.e. not work substantially
Make, piezo-resistance service life is high, when meeting with high voltage surge, moment breakdown piezo-resistance, is arrived in nanosecond speed shunt
Ground wire, reaches surge protection effect, and reliability and security are guaranteed.
In some embodiments, zero line N is grounded by a Y capacitance.Y capacitance primarily serves filter effect.
In some embodiments, piezo-resistance CNR1, CNR2, CNR3 and safety electric capacity CX1, CX2, CX3 bridging live wire L
With zero line N.
The beneficial effects of the utility model are：By setting piezo-resistance CNR and safety electric capacity between live wire and zero line
CX, and two piezo-resistances are added between zero line and ground wire, reach the effect of surge protection, circuit has quick protection when working
With protecting two kinds of mode of operations at a slow speed, safety electric capacity CX plays protection overvoltage effect, piezo-resistance CNR at a slow speed and plays quick guarantor
Effect is protected, two piezo-resistances are added between zero line and ground wire, traditional live wire is overcome and directly adds piezo-resistance with ground wire
Structural disadvantages, when solving traditional mode normal work, existing leakage defect, and cost is reduced, improve reliability.
Brief description of the drawings
Fig. 1 is the utility model surge protection circuit structural representation.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of surge protection circuit, including power supply terminal, power supply terminal draw three live wires
LI, L2, L3 and zero line N, live wire L1 set an a piezo-resistance CNR1 and safety electric capacity CX1 to be electrically connected with zero line N, live wire
L2 sets an a piezo-resistance CNR2 and safety electric capacity CX2 to be electrically connected with zero line N, and live wire L3 sets a piezo-resistance
CNR3 and safety electric capacity CX3 electrically connects with zero line N, piezo-resistance CNR1, CNR2, CNR3 and safety electric capacity CX1, CX2,
CX3 is using cross-over mode connection live wire L and zero line N.In surge protection circuit, piezo-resistance CNR1, CNR2, CNR3 are played quickly
Defencive function, safety electric capacity CX1, CX2, CX3 play defencive function at a slow speed.
Live wire L1 passes through CY3 capacity earths by CY1 capacity earth lines, live wire L2 by CY2 capacity earth lines, live wire L3
Line, zero line N pass through CY4 capacity earth lines.Y capacitance plays filter effect.
Zero line N is grounded by two piezo-resistances CNR4, CNR5.Zero line N and two piezo-resistance CNR4 of ground wire setting,
CNR5, in normal mode of operation, voltage is substantially zeroed between zero line N and ground wire, i.e., does not work substantially, and piezo-resistance uses the longevity
Life is high, when meeting with high voltage surge, moment breakdown piezo-resistance, is diverted to ground wire, reaches surge protection effect, reliability with
Security is guaranteed.
The utility model surge protection circuit, by setting piezo-resistance CNR and safety electric capacity between live wire and zero line
CX, and two piezo-resistances are added between zero line and ground wire, reach the effect of surge protection, circuit has quick protection when working
With protecting two kinds of mode of operations at a slow speed, safety electric capacity CX plays protection overvoltage effect, piezo-resistance CNR at a slow speed and plays quick guarantor
Effect is protected, two piezo-resistances are added between zero line and ground wire, traditional live wire is overcome and directly adds piezo-resistance with ground wire
Structural disadvantages, when solving traditional mode normal work, existing leakage defect, and cost is reduced, improve reliability.
Above-described is only some embodiments of the present utility model.For the person of ordinary skill of the art,
On the premise of not departing from the utility model and creating design, various modifications and improvements can be made, these belong to this practicality
New protection domain.
Claims (4)
1. a kind of surge protection circuit, it is characterised in that including power supply terminal, the power supply terminal draws three fire
Line LI, L2, L3 and zero line N, every live wire L set a piezo-resistance CNR and a safety electric capacity CX and zero line N respectively
Electrical connection, every live wire L are grounded by a Y capacitance.
2. surge protection circuit according to claim 1, it is characterised in that the zero line N passes through at least one pressure-sensitive electricity
Hinder CNR4, CNR5 ground connection.
3. surge protection circuit according to claim 1, it is characterised in that the zero line N is grounded by a Y capacitance.
4. surge protection circuit according to claim 1, it is characterised in that described piezo-resistance CNR1, CNR2, CNR3 and
Safety electric capacity CX1, CX2, CX3 bridge live wire L and zero line N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721178057.6U CN207124454U (en) | 2017-09-14 | 2017-09-14 | A kind of surge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721178057.6U CN207124454U (en) | 2017-09-14 | 2017-09-14 | A kind of surge protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207124454U true CN207124454U (en) | 2018-03-20 |
Family
ID=61601960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721178057.6U Active CN207124454U (en) | 2017-09-14 | 2017-09-14 | A kind of surge protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207124454U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109390925A (en) * | 2019-01-03 | 2019-02-26 | 阳光电源股份有限公司 | Inverter lightning-protection method, circuit and device and grid-connected inverters system |
| CN116760332A (en) * | 2023-06-08 | 2023-09-15 | 青岛云集控制技术有限公司 | Motor controller for shielding pump |
-
2017
- 2017-09-14 CN CN201721178057.6U patent/CN207124454U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109390925A (en) * | 2019-01-03 | 2019-02-26 | 阳光电源股份有限公司 | Inverter lightning-protection method, circuit and device and grid-connected inverters system |
| CN116760332A (en) * | 2023-06-08 | 2023-09-15 | 青岛云集控制技术有限公司 | Motor controller for shielding pump |
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Legal Events
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200401 Address after: 528000 Room 802, block 6, phase II, tianfulai international industrial city, No.37, Changbao West Road, Rongli community residents committee, Ronggui sub district office, Shunde District, Foshan City, Guangdong Province Patentee after: Guangdong BEICI Electronic Technology Co., Ltd Address before: 528000 workshop 501 and 502, building 14, phase III, tianfulai international industrial city, No. 33, Ronggui Rongli Changbao West Road, Shunde District, Foshan City, Guangdong Province Patentee before: GUANGDONG HIGHWAY ELECTRONIC TECHNOLOGY Co.,Ltd. |