CN207251204U - AC power protective device and power-supply device - Google Patents
AC power protective device and power-supply device Download PDFInfo
- Publication number
- CN207251204U CN207251204U CN201721064932.8U CN201721064932U CN207251204U CN 207251204 U CN207251204 U CN 207251204U CN 201721064932 U CN201721064932 U CN 201721064932U CN 207251204 U CN207251204 U CN 207251204U
- Authority
- CN
- China
- Prior art keywords
- branch
- varistor
- power
- output terminal
- discharge tube
- 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.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a kind of AC power protective device and power-supply device; with to corresponding first input end, the second input terminal and the 3rd input terminal being electrically connected with city and to corresponding the first output terminal being connected with power-supply device, the second output terminal and the 3rd output terminal; the AC power protective device includes the first branch, the second branch and the 3rd branch, and the first branch includes the first varistor being connected in series and has the function of the first discharge tube of open failure；The second branch includes the second varistor being connected in series and has the function of the second discharge tube of open failure；3rd branch includes the 3rd varistor；Wherein, the first end of the first branch, the second branch and the 3rd branch is connected with each other, and second end is corresponded to and is connected with the first input end and the first output terminal, the second input terminal and the second output terminal and the 3rd input terminal and the 3rd output terminal.
Description
Technical field
Field of circuit technology is the utility model is related to, more particularly to a kind of AC power protective device and power-supply device.
Background technology
The AC power of electronic equipment is easily disturbed be subject to overvoltage, such as the overvoltage due to being produced by lightning stroke,
The overvoltage of electric power system.Overvoltage can damage electronic equipment, it is necessary to be reduced to acceptable level.In the prior art as schemed
Shown in 1, when varistor MOV fails in Fig. 1, fail safe switch TR is acted to avoid pressure responsive resistor failure from catching fire, in order to anti-
The only power-frequency overvoltage failure of varistor MOV, varistor MOV needs selection higher, such as 621 or 681 pressure-sensitive electricity
Resistance, and pressure sensitive voltage MOV high, corresponding rear class residual voltage is high, then during the rear class for needing selection high voltage；Meanwhile pressure sensitive voltage
Height, will meet that 8/20us's and 10/350us is through-flow, and the volume of varistor MOV is big, and multiple fail saves are needed in circuit
TR is switched, causes protection circuit volume big.
Utility model content
The main purpose of the utility model is to propose a kind of AC power protective device and power-supply device, it is intended to is solved existing
The problem of pressure sensitive voltage of varistor is high, circuit volume is big is needed in technology.
To achieve the above object, the utility model proposes a kind of AC power protective device, have to corresponding and city
The first input end of electrical connection, the second input terminal and the 3rd input terminal and to it is corresponding be connected with power-supply device it is first defeated
Outlet, the second output terminal and the 3rd output terminal, the AC power protective device include：
The first branch, including the first varistor for being connected in series and there is the first discharge tube of open failure；
The second branch, including the second varistor for being connected in series and there is the second discharge tube of open failure；
3rd branch, including the 3rd varistor；
Wherein, the first branch, the second branch and the 3rd branch first end be connected with each other, second end correspond to it is described
First input end and the first output terminal, the second input terminal and the second output terminal and the 3rd input terminal and the connection of the 3rd output terminal.
Preferably, first discharge tube and/or the second discharge tube are the gas-discharge tube of open failure.
Preferably, the first input end is L terminals, and second input terminal is N-terminal, and the 3rd input terminal is PE
Terminal.
Preferably, the 3rd branch is further included has the function of open failure with what the 3rd varistor was connected in series
The 3rd discharge tube.
Based on same inventive concept, the application also provides a kind of power-supply device, and the power-supply device includes AC power
Protective device, has to corresponding first input end, the second input terminal and the 3rd input terminal being electrically connected with city and to right
The first output terminal, the second output terminal and the 3rd output terminal that should be connected with power-supply device, the AC power protective device include：
The first branch, including the first varistor for being connected in series and there is the first discharge tube of open failure；
The second branch, including the second varistor for being connected in series and there is the second discharge tube of open failure；
3rd branch, including the 3rd varistor；
Wherein, the first branch, the second branch and the 3rd branch first end be connected with each other, second end correspond to it is described
First input end and the first output terminal, the second input terminal and the second output terminal and the 3rd input terminal and the connection of the 3rd output terminal.
In technical solution provided by the utility model, by setting three branches, each branch is equipped with varistor, its
In the discharge tube with open failure is in series with two branches, then the first end of three branches is connected with each other, second
The corresponding connection in end and first input end and the first output terminal, the second input terminal and the second output terminal and the 3rd input terminal and the
Three output terminals connect, and the varistors of two series connection are included between such each two input terminal and at least one have open failure
The discharge tube of function, reduces pressure sensitive voltage, while coordinates the discharge tube with open failure to carry out open failure protection,
Effectively reduce the volume of AC power protective device.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other attached drawings can also be obtained according to the structure shown in these attached drawings.
Fig. 1 is the electrical schematic diagram of AC power protective device in the prior art；
Fig. 2 provides the electrical schematic diagram of an embodiment AC power protective device for the utility model；
Fig. 3 provides the electrical schematic diagram of another embodiment AC power protective device for the utility model；
Fig. 4 provides the electrical schematic diagram of another embodiment AC power protective device for the utility model.
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments obtained, shall fall within the protection scope of the present invention.
If it is to be appreciated that related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction be only used for explain it is opposite between each component under a certain particular pose (as shown in drawings)
Position relationship, motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes correspondingly.
If, should " first ", " the in addition, relate to the description of " first ", " second " etc. in the utility model embodiment
Two " etc. description is only used for description purpose, and it is not intended that instruction or implying its relative importance or implicit indicating meaning
The quantity of the technical characteristic shown.Thus, " first " is defined, the feature of " second " can express or implicitly include at least one
A this feature.In addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Personnel can be implemented as basis, and this technical side is will be understood that when the combination appearance of technical solution is conflicting or can not realize
The combination of case is not present, also not within the protection domain of the requires of the utility model.
As depicted in figs. 1 and 2, the utility model provides a kind of power-supply device, which protects including AC power
Device, the AC power protective device have defeated to the corresponding first input end being electrically connected with city, the second input terminal and the 3rd
Enter end and to corresponding the first output terminal, the second output terminal and the 3rd output terminal being connected with power-supply device, the AC power
Protective device includes the first branch, the second branch and the 3rd branch.
The first branch includes the first varistor MOV1 being connected in series and has the function of the first discharge tube of open failure
OGDT1；The second branch includes the second varistor MOV2 being connected in series and has the function of the second discharge tube of open failure
OGDT2；3rd branch includes the 3rd varistor MOV3；Wherein, the first end phase of the first branch, the second branch and the 3rd branch
Connect, second end corresponds to and first input end and the first output terminal, the second input terminal and the second output terminal and the 3rd input
End is connected with the 3rd output terminal.
Pressure sensitive voltage is high in the prior art, to meet that 8/20us's and 10/350us is through-flow, and the volume of varistor is big, and
Need multiple fail saves to switch in circuit, cause protection circuit volume big.And the utility model by set three branches, often
A branch is equipped with varistor, is in series with the discharge tube with open failure on two of which branch, then by three branch
The first end on road is connected with each other, and it is defeated with first input end and the first output terminal, the second input terminal and second that second end corresponds to connection
Outlet and the 3rd input terminal and the 3rd output terminal connect, and the pressure-sensitive electricity of two series connection are included between such each two input terminal
Resistance has the function of the discharge tube of open failure with least one, reduces pressure sensitive voltage, while cooperation has the function of open failure
Discharge tube carry out open failure protection, effectively reduce the volume of AC power protective device.
In the present embodiment, the first discharge tube OGDT1 and/or the second discharge tube OGDT2 is the gas discharge of open failure
Pipe.
Preferably, the 3rd branch is further included has the function of the of open failure with what the 3rd varistor MOV3 was connected in series
Three discharge tubes.
The connection mode for the AC power protective device that the application provides can include following manner：
Mode one
As shown in Fig. 2, first input end is L terminals, the second input terminal is N-terminal, and the 3rd input terminal is PE terminals.
The first end of the first branch, the second branch and the 3rd branch is connected with each other, and second end corresponds to defeated with L terminals and first
Outlet, N-terminal and the second output terminal and PE terminals and the 3rd output terminal connect.
There is the first varistor MOV1, the second varistor MOV2, the first discharge tube OGDT1 between L terminals and N-terminal
And second have the first varistor MOV1, the 3rd varistor MOV3 and the between discharge tube OGDT2, L terminal and PE terminals
One discharge tube OGDT1, between N-terminal and PE terminals there is the second varistor MOV2, the 3rd varistor MOV3 and second to put
Fulgurite OGDT2.That is L and N, L and PE, include two varistors connected between N and PE, reducing single varistor needs
The pressure sensitive voltage wanted, while L and N, L and PE, have the gas-discharge tube of open failure, ensure that varistor between N and PE
Fail safe after failure, the present embodiment are used cooperatively using varistor and gas-discharge tube, effectively reduce circuit
Volume.
Mode two
As shown in figure 3, first input end is L terminals, the second input terminal is PE terminals, and the 3rd input terminal is N-terminal.
The first end of the first branch, the second branch and the 3rd branch is connected with each other, and second end corresponds to defeated with L terminals and first
Outlet, PE terminals and the second output terminal and N-terminal are connected with the 3rd output terminal.
There is the first varistor MOV1, the 3rd varistor MOV3, the first discharge tube between L terminals and N-terminal
There is the first varistor MOV1, the second varistor MOV2, the first discharge tube OGDT1 between OGDT1, L terminal and PE terminals
And the second discharge tube OGDT2, there is the second varistor MOV2, the 3rd varistor MOV3 and the between N-terminal and PE terminals
Two discharge tube OGDT2.That is L and N, L and PE, include two varistors connected, reduce single pressure-sensitive electricity between N and PE
The pressure sensitive voltage needed, while L and N, L and PE are hindered, has the gas-discharge tube of open failure between N and PE, ensure that pressure-sensitive
Fail safe after resistance failure, the present embodiment are used cooperatively using varistor and gas-discharge tube, effectively reduce electricity
The volume on road.
Mode three
As shown in figure 4, first input end is PE terminals, the second input terminal is N-terminal, and the 3rd input terminal is L terminals.
The first end of the first branch, the second branch and the 3rd branch is connected with each other, and second end corresponds to and PE terminals and first
Output terminal, N-terminal and the second output terminal and L terminals and the 3rd output terminal connect.
There is the second varistor MOV2, the 3rd varistor MOV3 and the second discharge tube between L terminals and N-terminal
There is the first varistor MOV1, the 3rd varistor MOV3, the first discharge tube OGDT1 between OGDT2, L terminal and PE terminals,
There is the first varistor MOV1, the second varistor MOV2, the first discharge tube OGDT1 and second between N-terminal and PE terminals
Discharge tube OGDT2.That is L and N, L and PE, include two varistors connected, reduce single varistor between N and PE
The pressure sensitive voltage needed, while L and N, L and PE, have the gas-discharge tube of open failure, ensure that pressure-sensitive electricity between N and PE
Fail safe after resistance failure, the present embodiment are used cooperatively using varistor and gas-discharge tube, effectively reduce circuit
Volume.
It these are only the preferred embodiment of the utility model, it does not limit the scope of the patent of the present invention, every
Under the inventive concept of the utility model, equivalent structure transformation made based on the specification and figures of the utility model, or
Directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (5)
1. a kind of AC power protective device, have to the corresponding first input end being electrically connected with city, the second input terminal and the
Three input terminals and the first output terminal, the second output terminal and the 3rd output terminal being connected to correspondence with power-supply device, its feature
It is, the AC power protective device includes：
The first branch, including the first varistor for being connected in series and there is the first discharge tube of open failure；
The second branch, including the second varistor for being connected in series and there is the second discharge tube of open failure；
3rd branch, including the 3rd varistor；
Wherein, the first end of the first branch, the second branch and the 3rd branch is connected with each other, and second end corresponds to and described first
Input terminal and the first output terminal, the second input terminal and the second output terminal and the 3rd input terminal and the connection of the 3rd output terminal.
2. AC power protective device as claimed in claim 1, it is characterised in that first discharge tube and/or second put
Fulgurite is the gas-discharge tube of open failure.
3. AC power protective device as claimed in claim 1, it is characterised in that
The first input end is L terminals, and second input terminal is N-terminal, and the 3rd input terminal is PE terminals.
4. AC power protective device as claimed in claim 1, it is characterised in that the 3rd branch further includes and described
What three varistors were connected in series has the function of the 3rd discharge tube of open failure.
5. a kind of power-supply device, it is characterised in that including any AC power protective device of Claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721064932.8U CN207251204U (en) | 2017-08-23 | 2017-08-23 | AC power protective device and power-supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721064932.8U CN207251204U (en) | 2017-08-23 | 2017-08-23 | AC power protective device and power-supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207251204U true CN207251204U (en) | 2018-04-17 |
Family
ID=61881024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721064932.8U Active CN207251204U (en) | 2017-08-23 | 2017-08-23 | AC power protective device and power-supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207251204U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332394A (en) * | 2020-10-22 | 2021-02-05 | 马鞍山市槟城电子有限公司 | Surge protection circuit and electronic equipment |
-
2017
- 2017-08-23 CN CN201721064932.8U patent/CN207251204U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332394A (en) * | 2020-10-22 | 2021-02-05 | 马鞍山市槟城电子有限公司 | Surge protection circuit and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107591783B (en) | Three-phase power supply protection circuit and control method thereof | |
| CN203562774U (en) | Alternating-current lightning protection module for LED lighting equipment | |
| CN207251204U (en) | AC power protective device and power-supply device | |
| CN208638029U (en) | A kind of surging protection circuit | |
| CN208272621U (en) | A kind of power protecting circuit | |
| CN204835697U (en) | Preferred power supply switching circuit of voltage | |
| CN104779577B (en) | A kind of current foldback circuit | |
| CN104426120A (en) | Overcurrent and overvoltage protection circuit and lamp | |
| CN203942276U (en) | A kind of lightning protection circuit | |
| CN104569636A (en) | Circuit and device for early warning degradation of MOV (metal oxide varistor) of surge protection device | |
| CN207652028U (en) | A kind of switching power circuit and its protection circuit | |
| CN103326344B (en) | A kind of overvoltage limiting circuit | |
| CN202586325U (en) | Lightning-protection surge-proof power source protection device | |
| CN205670680U (en) | A kind of power distribution equipment with overvoltage protection | |
| CN204794065U (en) | Electric leakage circuit breaker thunderbolt surge protection circuit | |
| CN205544250U (en) | Resistance touch -sensitive screen protection circuit | |
| CN204666783U (en) | A kind of testing circuit for relay drive circuit | |
| CN207368657U (en) | A kind of overvoltage crowbar of alternating current | |
| CN204103467U (en) | A kind of protective circuit of automobile instrument circuit | |
| CN102931592A (en) | Lightning-protection power distribution cabinet | |
| CN203225714U (en) | Anti-lightning filter | |
| CN106208017A (en) | A kind of for arc-extinguishing harmonic-eliminating and the integration unit of overvoltage protection | |
| CN204719117U (en) | Utilize the earth leakage protective device ground wire leakage-current alarm circuit for lamp of optocoupler | |
| CN202111470U (en) | Lightning and surging protection circuit | |
| CN214708129U (en) | Single lamp controller with lightning surge protection function and street lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191111 Address after: 518000 west side of building e, zone a, Hongfa science and Technology Industrial Park, Tangtou community, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Bencent Electronics Co., Ltd. Address before: 523000 Guangdong province Dongguan city of Songshan Lake High and New Technology Industrial Development Zone, No. 8 Industrial South Road, the 1 floor of the venture building Patentee before: Dongguan Agam Semiconductor Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 west side of 1st floor, building e, area a, Hongfa science and Technology Industrial Park, Tangtou community, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Penang Electronics Co.,Ltd. Address before: 518000 west side of 1st floor, building e, area a, Hongfa science and Technology Industrial Park, Tangtou community, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Bencent Electronics Co.,Ltd. |