CN207603200U - A kind of power lightning protection circuit - Google Patents
A kind of power lightning protection circuit Download PDFInfo
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- CN207603200U CN207603200U CN201721917658.4U CN201721917658U CN207603200U CN 207603200 U CN207603200 U CN 207603200U CN 201721917658 U CN201721917658 U CN 201721917658U CN 207603200 U CN207603200 U CN 207603200U
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- lightning protection
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Abstract
A kind of power lightning protection circuit, including compound thermistor T1, varistor RT1, gas-discharge tube G1；One end of connector J1 is connected with the first end of compound thermistor T1, one end of connector J1 is connected with one end of varistor RT1, the other end of varistor RT1 is connected with the first end of gas-discharge tube G1, the other end ground connection of G1, the second end of the other end of varistor RT1 also with compound thermistor T1 are connected；Power lightning protection effect that is reaching efficiently simple low cost and being capable of automatic alarm.
Description
Technical field
The utility model is related to electric supply lightning protection field, more particularly to a kind of auto-alarming power lightning protection circuit.
Background technology
As thunder and lightning weather frequently occurs, and caused instantaneous overvoltage during the switching of power grid medium-and-large-sized electrical equipment, this
A little surge signals are entered by power supply in power equipment, and power equipment is caused greatly to damage, therefore in power equipment
It adds in lightning protection function and has become Compulsory Feature.
And the lightning protection device in industry mostly using color bar show lightning protection device malfunction, the bad identification of color, and
Special messenger is needed to carry out regularly lightning protection device malfunction inspection, increases manpower and materials cost.In addition there are some tape lights
Lightning protection device, expression lightning protection effect is lost or is damaged when lamp does not work, and need to replace immediately, however in actually using, every considerably long
Time, this failure can be just found, and enter power equipment if there is surge during failure, then equipment may be damaged
Or endanger personal safety.Also some lightning protection devices can upload malfunction, mostly mechanical contact-type or more device types, knot
Structure, circuit are complicated and cost is high.
In conclusion there are certain deficiencies and shortcoming for existing shocking preventing technology.
Invention content
For this reason, it may be necessary to a kind of power lightning protection circuit that is that efficiently simple low cost is provided and being capable of automatic alarm.
To achieve the above object, a kind of power lightning protection circuit is inventor provided, including compound thermistor T1, pressure-sensitive
Resistance RT1, gas-discharge tube G1；
One end of connector J1 is connected with the first end of compound thermistor T1, one end of connector J1 and varistor
One end of RT1 is connected, and the other end of varistor RT1 is connected with the first end of gas-discharge tube G1, the other end ground connection of G1, pressure
Second end of the other end of quick resistance RT1 also with compound thermistor T1 is connected；
Further include diode D1, diode D2, photoelectrical coupler U1, resistance R1, capacitance C1, resistance R3；Compound temperature-sensitive
The third end of resistance T1 is connected with the anode of diode D1, the cathode of diode D1 and cathode, the photoelectrical coupler of diode D2
The anode of U1 is connected, and the anode of diode D2 is connected with one end of the cathode of photoelectrical coupler U1, resistance R1, and resistance R1's is another
End and the second end of connector J1, the collector of photoelectrical coupler U1 connects with one end of resistance R3, collector also with capacitance C1
One end connection, emitter connect with the other end of capacitance C1, one end of the capacitance C1 also with the third end of connector J2 company
It connects, the second end of the other end of C1 also with connector J2 is connect, and the other end of the resistance R3 connects with the first end of connector J2
It connects.
Specifically, the other end of the R3 is also connect with monitor positive pole VCC.
Preferably, the emitter of the photoelectrical coupler U1 is also connect with monitor power cathode.
Optionally, the capacitance is filter capacitor.
Preferably, monitor is further included, the monitor is used to detect the level change of photoelectrical coupler U1 collectors, also
For being counted to change frequency.
The prior art is different from, above-mentioned technical proposal is when surge signal enters power equipment power port, compound temperature-sensitive
Varistor, another varistor RT1 and the common starting voltage clamping actions of gas-discharge tube G1 inside resistance, prevent circuit mistake
It carries, achievees the effect that power lightning protection.
Description of the drawings
Fig. 1 is the power lightning protection circuit diagram described in specific embodiment.
Specific embodiment
For the technology contents of technical solution, construction feature, the objects and the effects are described in detail, below in conjunction with specific reality
It applies example and attached drawing is coordinated to be explained in detail.
Referring to Fig. 1, the present embodiment introduces a kind of auto-alarming power lightning protection circuit, the power supply in power equipment is applied
Input front end, circuit is simple, of low cost.
The lightning protection circuit includes compound thermistor T1, varistor RT1, gas-discharge tube G1.The 1 of connector J1
End is connected with 1 end of compound thermistor T1, and 2 ends of connector J1 are connected with 1 end of varistor RT1, compound temperature-sensitive
3 ends of resistance T1 are connected with 2 ends of varistor RT1 and with 1 end of gas-discharge tube G1,2 ends of gas-discharge tube G1 with it is big
Ground is connected.
The automatic alarm circuit includes diode D1, diode D2, photoelectrical coupler U1, resistance R1, capacitance C1, electricity
Hinder R3.2 ends of compound thermistor T1 are connected with 1 end of diode D1, and 2 ends of diode D1 are with another diode D2's
2 ends, photoelectrical coupler U1 1 end be connected, 1 end of another diode D2 and 2 ends of photoelectrical coupler U1, resistance R1 2 ends
It is connected, 1 end of resistance R1 is connected with 1 end of 2 ends of connector J1, varistor RT1,4 ends of photoelectrical coupler U5 and resistance
1 end of R3,1 end of capacitance C1, connector J2 2 ends be connected, 3 ends of photoelectrical coupler U1 and 2 ends of capacitance C1, connector J2
3 ends be connected, 2 ends of resistance R3 are connected with 1 end of connector J2.
In further embodiment, the other end of R3 is also connect with monitor positive pole VCC.The photoelectrical coupler U1
Emitter also connect with monitor power cathode.The capacitance is filter capacitor.Through the above scheme by this circuit and monitoring
Device contacts, and the fluctuations of all circuits device that can all be monitored receives, and monitor can be alarmed upon receipt of the signals, failure
A variety of operations such as message display alarm, cut-out circuit protecting element preferably play the technology effect of power lightning protection circuit lightning protection
Fruit.
When surge signal enters power equipment power port, varistor, another pressure inside compound thermistor
The common starting voltage clamping actions of quick resistance RT1 and gas-discharge tube G1.The varistor in compound thermistor is because of electricity at this time
It gushes and absorbs energy and have Wen Sheng, and due to thermal coupling, the temperature of thermistor increases, in addition itself can be due to electric current
Increase and generate heat, after temperature reaches thermistor switch temperature, resistance value all rises, and causes through diode D1, photoelectric coupling
The electric current of device U1 and current-limiting resistance R1 drastically decline, so that it cannot 4 foot of secondary side of the light emitting diode, at this time U1 of driving U1
Level be 50% by low level or 50Hz, duty ratio impulse waveform variation be high level, the variation of this level can be supervised
Visual organ captures, so as in information such as the numbers of malfunction and lightning stroke of monitoring room or master control alarm lightning protection circuit.
It should be noted that although the various embodiments described above have been described herein, not thereby limit
The scope of patent protection of the utility model.Therefore, the innovative idea based on the utility model carries out embodiment described herein
Change and modification or equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, directly
Or above technical scheme is used in other related technical areas indirectly, it is included in the protection model of the utility model patent
Within enclosing.
Claims (5)
1. a kind of power lightning protection circuit, which is characterized in that including compound thermistor T1, varistor RT1, gas-discharge tube
G1；
One end of connector J1 is connected with the first end of compound thermistor T1, one end and the varistor RT1 of connector J1
One end be connected, the other end of varistor RT1 is connected with the first end of gas-discharge tube G1, the other end of G1 ground connection, pressure-sensitive
Second end of the other end of resistance RT1 also with compound thermistor T1 is connected；
Further include diode D1, diode D2, photoelectrical coupler U1, resistance R1, capacitance C1, resistance R3；Compound thermistor
The third end of T1 is connected with the anode of diode D1, the cathode of diode D1 and the cathode of diode D2, photoelectrical coupler U1
Anode is connected, and the anode of diode D2 is connected with one end of the cathode of photoelectrical coupler U1, resistance R1, the other end of resistance R1 and
The second end of connector J1, the collector of photoelectrical coupler U1 are connected with one end of resistance R3, collector also with capacitance C1 one
End connection, emitter are connect with the other end of capacitance C1, and one end of the capacitance C1 is also connect with the third end of connector J2, C1
Second end of the other end also with connector J2 connect, the other end of the resistance R3 is connect with the first end of connector J2.
2. power lightning protection circuit according to claim 1, which is characterized in that the other end of the R3 also with monitor power supply
Anode VCC connections.
3. power lightning protection circuit according to claim 1, which is characterized in that the emitter of the photoelectrical coupler U1 also with
Monitor power cathode connects.
4. power lightning protection circuit according to claim 1, which is characterized in that the capacitance is filter capacitor.
5. power lightning protection circuit according to claim 1, which is characterized in that further include monitor, the monitor is used for
The level change of photoelectrical coupler U1 collectors is detected, is additionally operable to count change frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721917658.4U CN207603200U (en) | 2017-12-28 | 2017-12-28 | A kind of power lightning protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721917658.4U CN207603200U (en) | 2017-12-28 | 2017-12-28 | A kind of power lightning protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207603200U true CN207603200U (en) | 2018-07-10 |
Family
ID=62769428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721917658.4U Active CN207603200U (en) | 2017-12-28 | 2017-12-28 | A kind of power lightning protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207603200U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268761A (en) * | 2018-08-17 | 2019-01-25 | 芜湖左舒电子商务有限公司 | A kind of solar lighting street lamp |
| CN110336264A (en) * | 2019-08-22 | 2019-10-15 | 成都铁达电子股份有限公司 | A kind of pressure limiting circuit |
-
2017
- 2017-12-28 CN CN201721917658.4U patent/CN207603200U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268761A (en) * | 2018-08-17 | 2019-01-25 | 芜湖左舒电子商务有限公司 | A kind of solar lighting street lamp |
| CN110336264A (en) * | 2019-08-22 | 2019-10-15 | 成都铁达电子股份有限公司 | A kind of pressure limiting circuit |
| CN110336264B (en) * | 2019-08-22 | 2024-01-26 | 成都铁达电子股份有限公司 | Voltage limiting circuit |
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