CN205786941U - A kind of AC220V power interface protection leakage current monitoring system design circuit - Google Patents
A kind of AC220V power interface protection leakage current monitoring system design circuit Download PDFInfo
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- CN205786941U CN205786941U CN201620478668.1U CN201620478668U CN205786941U CN 205786941 U CN205786941 U CN 205786941U CN 201620478668 U CN201620478668 U CN 201620478668U CN 205786941 U CN205786941 U CN 205786941U
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Abstract
This utility model provides a kind of AC220V power interface protection leakage current monitoring system design circuit, including the leak-proof circuit being sequentially connected electrically and supervisory circuit, described leak-proof circuit includes at least one electric fuse and at least one transient interference suppressor part of series connection, and described supervisory circuit is parallel to input and the outfan of transient interference suppressor part；Described supervisory circuit includes at least one light emitting diode; by being connected in series transient interference suppressor part in one end of electric fuse; and supervisory circuit is connected in parallel in the input of transient interference suppressor part and outfan; when blown fuse; the situation of circuit can be reacted by the light emitting diode in supervisory circuit in real time; user can carry out the whether normal of judging circuit by observing the lighting conditions of light emitting diode, safeguard protection degree height, human oriented design and can realize accurately monitoring.
Description
[technical field]
This utility model relates to electronic circuit technology field, particularly relates to that a kind of safeguard protection degree is high, hommization sets
Meter, the AC220V power interface that can realize accurately monitoring protect leakage current monitoring system design circuit.
[background technology]
Along with developing rapidly of modern science and technology, electronics, power electronics, electrical equipment overvoltage protection application pressure
Quick resistance is more and more extensive, and varistor typically parallel connection uses in circuit, when the voltage at varistor two ends is sent out
When life drastically changes, voltage stabilization in certain limit, is played a protective role by varistor, and varistor is at electricity
Lu Zhong, is usually used in power supply AC220V overvoltage protection and voltage stabilizing.
But, in actually used situation, varistor due to leakage current problem is the most aging, very
To explosion, bringing the biggest potential safety hazard, be unfavorable for the life-time service of product, the failure mode of varistor is led to
Being often short circuit, in order to prevent the inefficacy of varistor from causing power supply short circuit and on fire, the most a lot of producers are at circuit
Upper inline fuse or pressure-sensitive ceramic gas discharge tube in parallel, thus improve reliability.
General electronic products AC220V is powered and is all used varistor to protect to do surge over voltage at present, and in reality
In the use on border all can there is certain leakage current in varistor itself, and according to material characteristic, each brand is not
With, the aging variation of its stability and use is very big, the most all can burn because of aging after a certain time
Ruin, or burst because of surge over voltage, but still exist in after damage on electronic product circuit PCB, cause occurring
Because pressure-sensitive aging rear heat history burns out the phenomenon of PCB.
For solve the problems referred to above, improve product use safety and service life, those skilled in the art from
All many-sides have carried out concrete improvement, and achieve preferable achievement and breakthrough.
[utility model content]
For overcoming the problem existing for prior art, this utility model provides a kind of safeguard protection degree height, hommization
Design, the AC220V power interface that can realize accurately monitoring protect leakage current monitoring system design circuit.
This utility model solves the scheme of technical problem and is to provide a kind of AC220V power interface protection leakage current prison
Control design circuit, including the leak-proof circuit being sequentially connected electrically and supervisory circuit, described leak-proof circuit includes series connection
At least one electric fuse and at least one transient interference suppressor part, described supervisory circuit is parallel to glitch and presses down
The input of device processed and outfan；Described supervisory circuit includes at least one light emitting diode.
Preferably, described supervisory circuit also includes at least one resistance being connected in series with light emitting diode.
Preferably, described transient interference suppressor part is varistor, when its two poles of the earth are by transient state high energy impact events
Time with fast speed, the high impedance of two interpolars can be become Low ESR, absorb surge or the pulse merit of up to thousands of watts
Rate, makes to be positioned at a predetermined value at the voltage of two interpolars.
Preferably, described electric fuse is slow fusing type fuse.
Preferably, described predetermined value is less than twice rated operational voltage.
Preferably, described transient interference suppressor part is the suppression device with carrying out surge protection ability.
Preferably, the quantity of described light emitting diode is two, is series in circuit.
Compared with prior art, this utility model one AC220V power interface protection leakage current monitoring system design electricity
Road is by being connected in series transient interference suppressor part in one end of electric fuse, and is connected in parallel supervisory circuit in wink
The input of state AF panel device and outfan, when blown fuse, the situation of circuit can be passed through in real time
Light emitting diode in supervisory circuit is reacted, and user can sentence by observing the lighting conditions of light emitting diode
Other circuit whether normal, safeguard protection degree is high, human oriented design and can realize accurately monitoring.
[accompanying drawing explanation]
Fig. 1 is the circuit diagram of this utility model a kind of AC220V power interface protection leakage current monitoring system design circuit.
[detailed description of the invention]
For making the purpose of this utility model, technical scheme and advantage are clearer, below in conjunction with accompanying drawing and reality
Execute example, this utility model is further elaborated.Should be appreciated that specific embodiment described herein
It is used only for explaining this utility model, is not used to limit this utility model.
Refer to Fig. 1, this utility model one AC220V power interface protection leakage current monitoring system design circuit 1
Including the leak-proof circuit being sequentially connected electrically and supervisory circuit, described leak-proof circuit includes at least one insurance of series connection
Silk Fuse1 and at least one transient interference suppressor part R1, described supervisory circuit is parallel to transient interference suppressor
The input of part R1 and outfan；Described supervisory circuit includes at least one light emitting diode D1, by insurance
One end of silk Fuse1 is connected in series transient interference suppressor part R1, and supervisory circuit is connected in parallel and does in transient state
Disturbing input and the outfan of suppression device R1, when electric fuse Fuse1 fuses, the situation of circuit can be real
Time reacted by the light emitting diode D1 in supervisory circuit, user can be by observing light emitting diode D1
Lighting conditions carrys out the whether normal of judging circuit, and safeguard protection degree is high, human oriented design and can realize accurately monitoring.
Preferably, described supervisory circuit also includes at least one resistance R2 being connected in series with light emitting diode D1.
Preferably, described transient interference suppressor part R1 is varistor, when its two poles of the earth are by transient state high-energy
With fast speed, the high impedance of two interpolars Low ESR be can be become during impact, surge or the arteries and veins of up to thousands of watts absorbed
Rush power, make at the voltage of two interpolars, to be positioned at a predetermined value.
Preferably, described electric fuse Fuse1 is slow fusing type fuse, will not fuse under surge over voltage impacts.
Preferably, described predetermined value is less than twice rated operational voltage, can effectively protect in electronic circuit
Precision components is from the destruction of various surge pulse.
Preferably, described transient interference suppressor part is the suppression device with carrying out surge protection ability.
Preferably, the quantity of described light emitting diode D1 is two, is series in circuit.
In this circuit by power interface first increase be electric fuse Fuse1, R1, Fuse1 and R1 be also
Being associated in the L of power interface, between N, R1 is highly effective transient interference suppressor part, when its two poles of the earth are by wink
During state high energy impact events, the high impedance of two interpolars can be become Low ESR with the speed of μ S magnitude by it, absorbs
The surge of up to thousands of watts or pulse power, make the voltage clamp of two interpolars in a predetermined value (generally less than
2 times of rated operational voltages), the precision components in protection electronic circuit is from various surge pulse effectively
Destroying, Fuse1 selects slow fusing type fuse will not fuse under surge over voltage impacts, the most in use, and R1
The leakage current that there are 20 μ about A in the line in parallel, the leakage current of accumulative R1 over time can increase, R1
On temperature rise change occurs, cause on circuit Fuse1 to disconnect after reaching type selecting Fuse1；At Fuse1, D1, R2
A branch line can be at Fuse1, R1 has carrying out surge protection ability, D1 display lamp Chang Liang when R1 did not lost efficacy, monitoring
Fuse1, R1 still function as overvoltage surge protective capability, and when R1 is aging, when electric leakage increases, can fuse Fuse1,
D2 display lamp extinguishes, and user can change this circuit to ensure the persistence of surge protection ability in accordance with the instructions.
Using the protection monitoring scheme in this programme, user can monitor the work of electronic product surge over voltage protection
State, reminds hidden danger to change protection circuit module in time when occurring simultaneously, stops the appearance of fault on fire；
Also can protect power circuit causes overvoltage surge to impact electronic circuit because of power network fluctuation simultaneously, and that improves system can
By property.
Compared with prior art, this utility model one AC220V power interface protection leakage current monitoring system design electricity
Road by being connected in series transient interference suppressor part R1 and supervisory circuit is in parallel in one end of electric fuse Fuse1
It is connected on input and the outfan of transient interference suppressor part R1, when electric fuse Fuse1 fuses, circuit
Situation can be reacted by the light emitting diode D1 in supervisory circuit in real time, user can by observe send out
The lighting conditions of optical diode D1 carrys out the whether normal of judging circuit, safeguard protection degree is high, human oriented design and
Can realize accurately monitoring.
Above-described this utility model embodiment, is not intended that the restriction to this utility model protection domain.
Any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, all should comprise
Within claims of the present utility model.
Claims (7)
1. an AC220V power interface protection leakage current monitoring system design circuit, it is characterised in that: include successively
The leak-proof circuit of electrical connection and supervisory circuit, described leak-proof circuit includes at least one electric fuse and at least of series connection
One transient interference suppressor part, described supervisory circuit is parallel to input and the output of transient interference suppressor part
End；Described supervisory circuit includes at least one light emitting diode.
2. a kind of AC220V power interface protection leakage current monitoring system design circuit as claimed in claim 1, its
It is characterised by: described supervisory circuit also includes at least one resistance connected with light emitting diode.
3. a kind of AC220V power interface protection leakage current monitoring system design circuit as claimed in claim 1, its
It is characterised by: described transient interference suppressor part is varistor, when its two poles of the earth are by transient state high energy impact events
With fast speed, the high impedance of two interpolars Low ESR be can be become, surge or the pulse merit of up to thousands of watts absorbed
Rate, makes to be positioned at a predetermined value at the voltage of two interpolars.
4. a kind of AC220V power interface protection leakage current monitoring system design circuit as claimed in claim 1, its
It is characterised by: described electric fuse is slow fusing type fuse.
5. a kind of AC220V power interface protection leakage current monitoring system design circuit as claimed in claim 3, its
It is characterised by: described predetermined value is less than twice rated operational voltage.
6. a kind of AC220V power interface protection leakage current monitoring system design circuit as claimed in claim 1, its
It is characterised by: described transient interference suppressor part is the suppression device with carrying out surge protection ability.
7. a kind of AC220V power interface protection leakage current monitoring system design circuit as claimed in claim 1, its
It is characterised by: the quantity of described light emitting diode is two, is series in circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620478668.1U CN205786941U (en) | 2016-05-24 | 2016-05-24 | A kind of AC220V power interface protection leakage current monitoring system design circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620478668.1U CN205786941U (en) | 2016-05-24 | 2016-05-24 | A kind of AC220V power interface protection leakage current monitoring system design circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205786941U true CN205786941U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620478668.1U Active CN205786941U (en) | 2016-05-24 | 2016-05-24 | A kind of AC220V power interface protection leakage current monitoring system design circuit |
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| CN (1) | CN205786941U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108628792A (en) * | 2018-05-14 | 2018-10-09 | 福建科立讯通信有限公司 | The anti-current leakage system and method for communication interface |
-
2016
- 2016-05-24 CN CN201620478668.1U patent/CN205786941U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108628792A (en) * | 2018-05-14 | 2018-10-09 | 福建科立讯通信有限公司 | The anti-current leakage system and method for communication interface |
| CN108628792B (en) * | 2018-05-14 | 2021-02-19 | 福建科立讯通信有限公司 | Communication interface current leakage prevention system and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 T3B5-505A Software Building No. 11 South 7 High-tech Road, Yuehai Street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen SES Technology Co., Ltd. Address before: 518000 Room 401 5, Fengyun Science and Technology Building, No. 5 Industrial Zone, North District, Nanshan High-tech Zone, Shenzhen City, Guangdong Province (office only) Patentee before: Shenzhen City Sheng technology Limited by Share Ltd |