CN202872355U - Lightening protection circuit - Google Patents
Lightening protection circuit Download PDFInfo
- Publication number
- CN202872355U CN202872355U CN201220486335.5U CN201220486335U CN202872355U CN 202872355 U CN202872355 U CN 202872355U CN 201220486335 U CN201220486335 U CN 201220486335U CN 202872355 U CN202872355 U CN 202872355U
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- CN
- China
- Prior art keywords
- resistance
- piezo
- protection circuit
- varistor
- lightening
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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.)
- Expired - Lifetime
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a lightening protection circuit. The lightening protection circuit comprises a rapid conduction diode, a current-limiting resistor, a first varistor, a second varistor and a discharge tube, wherein the rapid conduction diode and the current-limiting resistor is connected in series to form a first branch circuit; the first varistor and the second varistor are connected in series to form a second branch circuit; the first branch circuit and the second branch circuit are connected in parallel and then are connected between a zero line and a live line; a connection point of the first varistor and the second varistor are connected to ground through the discharge tube. The lightening protection circuit realizes lightening protection through the two branch circuits between the zero line and the live line, and when no lightening enters the circuit, both the two branch circuits are in a high-resistance state, and when lightening enters the circuit, the lightening rapidly passes through the connection point of the first varistor and the second varistor and thus powers on the discharge tube which then guides the lightening to the ground. Accordingly, good lightening protection effects are realized, and electric equipment is protected.
Description
Technical field
The utility model relates to electronic technology field, relates in particular to a kind of lightning protection circuit.
Background technology
Along with the development of electronics, mechanics of communication, the application of electronic product in life is more and more, has become an indispensable part in our life.Existing electronic product, the integrated level of chip is more and more higher, circuit design density is increasing, how under the thunder and lightning condition of harshness so that the electronic product steady operation becomes the problem that needs solve.Therefore, be badly in need of a kind of lightning protection circuit of realizing lightning protection effect on the power port that is installed on the market.
The utility model content
For the weak point that exists in the above-mentioned technology, the utility model provides a kind of lightning protection circuit, can be installed in and realize lightning protection effect on the power port.
For achieving the above object, the utility model provides a kind of lightning protection circuit, comprises fast conducting diode, current-limiting resistance, the first piezo-resistance, the second piezo-resistance and discharge tube; Described fast conducting diode and current-limiting resistance series connection form the first branch road, and described the first piezo-resistance and the series connection of the second piezo-resistance form the second branch road, are connected between zero line and the live wire behind described the first branch road and the second branch circuit parallel connection; The tie point of described the first piezo-resistance and the second piezo-resistance is by discharge tube ground connection.
Wherein, described lightning protection circuit also comprises fuse, described the first branch road be connected that an end connects live wire by fuse behind the branch circuit parallel connection, the other end is connected with zero line.
Wherein, described lightning protection circuit also comprises indicator light, and described indicator light is connected between fast conducting diode and the current-limiting resistance.
The beneficial effects of the utility model are: compared with prior art; the lightning protection circuit that the utility model provides; realize lightning protection by two branch roads that are connected between zero line and the live wire; when entering without thunder and lightning, two branch roads all are in high-impedance state, when there being thunder and lightning to enter; thunder and lightning is rapidly by the discharge of the tie point conducting discharge tube between the first piezo-resistance and the second piezo-resistance; thunder and lightning is imported in the earth, realize good lightning protection effect, the protection power consumption equipment.
Description of drawings
Fig. 1 is the circuit diagram of lightning protection circuit of the present utility model.
The main element symbol description is as follows:
D1, fast conducting diode R1, current-limiting resistance
YM1, the first piezo-resistance YM2, the second piezo-resistance
A1, discharge tube PF1, fuse
D2, indicator light GND,
L, live wire N, zero line
E, earth terminal
Embodiment
In order more clearly to explain the utility model, below in conjunction with accompanying drawing the utility model is done to describe further.
See also Fig. 1, lightning protection circuit of the present utility model comprises fast conducting diode D1, current-limiting resistance R1, the first piezo-resistance YM1, the second piezo-resistance YM2 and discharge tube A1; Fast conducting diode D1 and current-limiting resistance R1 series connection form the first branch road, and the first piezo-resistance YM1 and the second piezo-resistance YM1 series connection form the second branch road, are connected in behind the first branch road and the second branch circuit parallel connection between zero line N and the live wire L; The tie point of the first piezo-resistance YM1 and the second piezo-resistance YM2 is by discharge tube A1 ground connection GND.
Situation compared to prior art; the lightning protection circuit that the utility model provides; realize lightning protection by two branch roads that are connected between zero line N and the live wire L; when entering without thunder and lightning, two branch roads all are in high-impedance state, when there being thunder and lightning to enter; thunder and lightning is rapidly by the discharge of the tie point conducting discharge tube between the first piezo-resistance and the second piezo-resistance; thunder and lightning is imported in the earth, realize good lightning protection effect, the protection power consumption equipment.
In the present embodiment, above-mentioned lightning protection circuit also comprises fuse PF1, the first branch road be connected that an end connects live wire L by fuse PF1 behind the branch circuit parallel connection, the other end is connected with zero line N.A kind of Thermal Cutoffs during fuse PF1, specification are the 16A/250V/115 degree, can provide protection to the circuit of this case.
In the present embodiment, above-mentioned lightning protection circuit also comprises indicator light D2, and indicator light D2 is connected between fast conducting diode D1 and the current-limiting resistance R1.Indicator light D2 can be luminous when thunder and lightning produces, and thunder and lightning entered have indicative function.
In the present embodiment, above-mentioned lightning protection circuit also comprises earth terminal E, generally is used for the circuit of Three-hole socket, the direct ground connection GND of earth terminal E.
More than disclosed only be several specific embodiment of the present utility model, but the utility model is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection range of the present utility model.
Claims (3)
1. a lightning protection circuit is characterized in that, comprises fast conducting diode, current-limiting resistance, the first piezo-resistance, the second piezo-resistance and discharge tube; Described fast conducting diode and current-limiting resistance series connection form the first branch road, and described the first piezo-resistance and the series connection of the second piezo-resistance form the second branch road, are connected between zero line and the live wire behind described the first branch road and the second branch circuit parallel connection; The tie point of described the first piezo-resistance and the second piezo-resistance is by discharge tube ground connection.
2. lightning protection circuit according to claim 1 is characterized in that, described lightning protection circuit also comprises fuse, described the first branch road be connected that an end connects live wire by fuse behind the branch circuit parallel connection, the other end is connected with zero line.
3. lightning protection circuit according to claim 1 and 2 is characterized in that, described lightning protection circuit also comprises indicator light, and described indicator light is connected between fast conducting diode and the current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220486335.5U CN202872355U (en) | 2012-09-21 | 2012-09-21 | Lightening protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220486335.5U CN202872355U (en) | 2012-09-21 | 2012-09-21 | Lightening protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202872355U true CN202872355U (en) | 2013-04-10 |
Family
ID=48039044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220486335.5U Expired - Lifetime CN202872355U (en) | 2012-09-21 | 2012-09-21 | Lightening protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202872355U (en) |
-
2012
- 2012-09-21 CN CN201220486335.5U patent/CN202872355U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN SINWAY SOUTH TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: QIAO XINGBO Effective date: 20150202 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150202 Address after: 518000 Guangdong Province, Shenzhen city Longhua District Guanlan community Bu Xin Lu Da BU Xiang No. 184 building B Patentee after: SHENZHEN SINWAY SOUTH TECHNOLOGY CO.,LTD. Address before: 3, building 518000, floor 26, A District, Tang Lang Industrial Zone, Taoyuan street, Nanshan District, Guangdong, Shenzhen Patentee before: Qiao Xingbo |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |
|
| CX01 | Expiry of patent term |