CN207586360U - A kind of fault arc detection device - Google Patents
A kind of fault arc detection device Download PDFInfo
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- CN207586360U CN207586360U CN201721879035.2U CN201721879035U CN207586360U CN 207586360 U CN207586360 U CN 207586360U CN 201721879035 U CN201721879035 U CN 201721879035U CN 207586360 U CN207586360 U CN 207586360U
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Abstract
A kind of fault arc detection device of the utility model, the temperature detection modulate circuit, current detecting modulate circuit are all connected with logic judging circuit, and logic judging circuit is with the electric cabinet power switch driving circuit of connection；The problem of efficiently solving current power distribution cabinet operation data failure electric arc, being not easy by timely analysis, processing.The utility model is detected electric components temperature in power distribution cabinet, when 2500 DEG C are increased in unit interval 15S, it exports high level fault arc information to AND gate circuit and carries out logic judgment, circuit powers on stream and is detected when working power distribution cabinet, during voltage corresponding less than lowest threshold 0.3A, output high level fault arc information AND gate circuit carries out logic judgment, when the two is high level, AND gate circuit exports high level, improves the precision of fault electric arc interpretation；Driving triode Q1 conductings, the flicker of red alarm lamp, relay K1 coils obtain electric, automatically cut off power distribution cabinet power switch, can timely processing, avoid the generation of fault electric arc.
Description
Technical field
The utility model is related to technical field of electric equipment, more particularly to a kind of fault arc detection device.
Background technology
Fault electric arc detection technique is exactly from a large amount of harmless electric arc the easy harmful electric arc pulse for generating electrical fire
It detected in pulse and disturbing pulse, then cut off the power, while malfunction cannot be generated again, at present power distribution cabinet electric equipment
Fault electric arc monitoring system detects power distribution cabinet electric equipment operation ginseng using the fault electric arc detector in power distribution cabinet
Number, is used as data transmission channel by industrial optical fiber looped network or GPRS/3G wireless private networks later, is transmitted to monitoring center, supervises
Control center is analyzed and determined, when judging arc fault, control respective execution mechanisms are cut off the power, however monitoring center receives
Data have certain time delay, and same time point obtains the mode that data generally use is first handled first, once distribution
There is exception in cabinet operation data, is not easy by timely analysis, processing.
So the utility model provides a kind of new scheme to solve the problems, such as this.
Invention content
For the above situation, to overcome the defect of the prior art, the utility model is designed to provide a kind of failure electricity
Arc detection device has and is skillfully constructed and the characteristic of human oriented design, efficiently solves current power distribution cabinet operation data and occurs
Fault electric arc, the problem of being not easy by timely analysis, processing.
Its technical solution solved is, including temperature detection modulate circuit, current detecting modulate circuit, logic judgment electricity
Road, power distribution cabinet switch driving circuit, which is characterized in that the temperature detection modulate circuit, current detecting modulate circuit are all connected with
Logic judging circuit, logic judging circuit is with the electric cabinet power switch driving circuit of connection；
The temperature detection modulate circuit includes thermistor RT1, RT2, one end connection ground of thermistor RT2, temperature-sensitive
One end of the other end connection thermistor RT1 of resistance RT2, the other end of thermistor RT1 connect respectively one end of resistance R1,
One end of ground capacity C1, one end of ground resistance R2, resistance R3 one end, resistance R1 the other end connection power supply+5V, resistance
The other end of R3 connects one end of the inverting input of operational amplifier A R1, one end of ground capacity C3, resistance R4 respectively, fortune
One end of the in-phase input end connection resistance R5 of amplifier AR1 is calculated, the other end of resistance R5 connects the lower end of resistance R7, connects respectively
One end of ground resistance R8, one end of the output terminal connection resistance R6 of operational amplifier A R2, the other end of resistance R6 connect electricity respectively
The upper end of R7, one end of capacitance C4 are hindered, the other end of capacitance C4 connects the inverting input of operational amplifier A R2, resistance respectively
One end of R9, by resistance R10 connections ground, the other end of resistance R9 connects surely the in-phase input end of operational amplifier A R2 respectively
The anode of pressure pipe ZD1, the cathode of voltage-stabiliser tube ZD2；
The current detecting modulate circuit includes current transformer J1, and the pin 1 of current transformer J1 connects power supply+12V,
The pin 3 of current transformer J1 connects power supply -12V, and the pin 2 of current transformer J1 connects one end of inductance L1, inductance L1's
The other end connect respectively one end of ground capacity C5, resistance R11 one end, the other end connection operational amplifier A R3 of resistance R11
In-phase input end, the inverting input of operational amplifier A R3 connect respectively one end of ground resistance R12, resistance R13 one
End, the other end of resistance R13 connect the in-phase input end of the output terminal of operational amplifier A R3, operational amplifier A R4 respectively, transport
Calculate amplifier AR4 inverting input connect respectively one end of resistance R14, resistance R15 one end, the other end of resistance R15 connects
The upper end of potentiometer RP1 is connect, the lower end of potentiometer RP1 connects ground, the other end connection power supply+5V of resistance R14 with adjustable end.
The utility model is detected electric components temperature in power distribution cabinet, and temperature increases in unit interval 15S
At 2500 DEG C, output high level fault arc information to AND gate circuit carries out logic judgment, and circuit powers on when working power distribution cabinet
Stream is detected, and during voltage corresponding less than lowest threshold 0.3A, output high level fault arc information AND gate circuit is patrolled
It collects and judges, when the two is high level, AND gate circuit exports high level, improves the precision of fault electric arc interpretation；Driving three
Pole pipe Q1 conductings, the flicker of red alarm lamp, relay K1 coils obtain electric, automatically cut off power distribution cabinet power switch, can timely processing,
Avoid the generation of fault electric arc.
Description of the drawings
Fig. 1 is the circuit link block figure of the utility model.
Fig. 2 is the circuit catenation principle figure of the utility model.
Specific embodiment
Aforementioned and other technology contents, feature and effect in relation to the utility model, in following cooperation with reference to figures 1 through figure
In the detailed description of 2 pairs of embodiments, can clearly it present.The structure content being previously mentioned in following embodiment is with explanation
Book attached drawing is reference.
Each exemplary embodiment of the utility model is described below with reference to accompanying drawings.
Embodiment one, a kind of fault arc detection device, including temperature detection modulate circuit to member device electrical in power distribution cabinet
Part temperature is detected, and when temperature increases 2500 DEG C in unit interval 15S, exports high level, current detecting modulate circuit pair
When power distribution cabinet works, circuit powers on stream and is detected, and during voltage corresponding less than lowest threshold 0.3A, exports high level, works as electricity
When there is high level on stream detection modulate circuit, any road of temperature detection modulate circuit, can make in logic judging circuit NMOS tube T1 or
T2 conductings, PMOS tube T3 or T4 cut-off, export high level effective information, triode Q1 conductings in power distribution cabinet switch driving circuit,
The flicker of red alarm lamp, relay K1 coils obtain electric, automatically cut off power distribution cabinet power switch；The temperature detection modulate circuit pair
Electric components temperature is detected in power distribution cabinet, when temperature increases 2500 DEG C in unit interval 15S, exports high level, when
When distribution in-cabinet temperature changes, the resistance value of thermistor RT1, RT2 change, thus resistance R1 and thermistor RT1,
The bleeder circuit of RT2 compositions changes, i.e., the rc filter circuit formed through capacitance C1, resistance R2 and resistance R3, capacitance C2,
The circuit and square-wave of operational amplifier A R1, capacitance C3, resistance R4, R5, R6, R7 composition, operation amplifier are sent to after filtering clutter interference
Device AR1 output terminals feed back to the in-phase input end of operational amplifier A R1, capacitance C3, electricity after resistance R7, R8 partial pressure through resistance R5
The integrating circuit for hindering R4 compositions introduces negative-feedback, and operational amplifier A R1 is comparator, by the charge and discharge of capacitance C3 and operation amplifier
Voltage is converted to the overturning of output state after the coupling of device AR1 output voltages, and square-wave signal is generated with this, after through operational amplifier
The differential circuit that AR2, capacitance C4, resistance R9, R10 are formed, when square-wave signal is in the unit interval（15S）Interior mutation（Raising
2500℃）When, i.e. square wave mutation formula exports high and low level, the voltage-stabiliser tube ZD1 through reverse parallel connection, voltage-stabiliser tube ZD2 voltage stabilizings
After export；When the current detecting modulate circuit works to power distribution cabinet, circuit powers on stream and is detected, less than lowest threshold 0.3A
During corresponding voltage, high level is exported, including current transformer J1, the pin 1 of current transformer J1 connects power supply+12V, electric current
The pin 3 of mutual inductor J1 connects power supply -12V, and the current signal of the output detection of pin 2 of current transformer J1 is through inductance L1, electricity
Enter resistance R11, the in-phase input end of operational amplifier A R3, resistance R12, resistance R13 after holding the filter circuit filtering of C5 compositions
The in-phase proportion amplifying circuit of composition, the multiple amplified by the value of regulation resistance R11, resistance R13, adjustable proportion, later
Into the in-phase input end of operational amplifier A R4, the inverting input threshold voltage with operational amplifier A R4（0.3A threshold values electricity
Flow corresponding voltage）It being compared, threshold voltage is provided by the bleeder circuit that resistance R14, resistance R15, potentiometer RP1 are formed,
When the homophase input terminal voltage of operational amplifier A R4 is less than anti-phase input terminal voltage, operational amplifier A R4 output high level,
Otherwise low level is exported.
Embodiment two, on the basis of embodiment one, the logic judging circuit forms electric with door through metal-oxide-semiconductor T1-T4
Road carries out logic judgment, exports high level or low level signal, including metal-oxide-semiconductor T1-T4, the NMOS tube of specially two series connection
T3, T4, two PMOS tube T1, T2 in parallel, current detecting modulate circuit export high and low level and connect metal-oxide-semiconductor T2, T4 respectively
Grid, the high level of temperature detection modulate circuit output connect the grid of metal-oxide-semiconductor T1, T3 respectively, and the source electrode of metal-oxide-semiconductor T1, T2 connect
Ground, the drain electrode of metal-oxide-semiconductor T1, T2 connect the drain electrode of metal-oxide-semiconductor T4, and the source electrode of metal-oxide-semiconductor T4 connects the drain electrode of metal-oxide-semiconductor T3, the source electrode of metal-oxide-semiconductor T3
Power supply+5V is met, when current detecting modulate circuit, temperature detection modulate circuit have high level, can lead NMOS tube T1 or T2
Logical, PMOS tube T3 or T4 cut-off, exports high level effective information.
Embodiment three, on the basis of embodiment one, the power distribution cabinet power switch driving circuit is used to work as logic judgment
During circuit output high level, triode Q1 conductings, the flicker of red alarm lamp, relay K1 coils obtain electric, automatically cut off power distribution cabinet
Power switch, including triode Q1, the base stage of connecting triode Q1 when logic judging circuit exports high level, due to triode Q1
Emitter connection ground, triode Q1 saturation conductions, collector potential drags down, power supply+12V and be added to red alarm lamp
The warning circuit of LED1, resistance R16 composition and the both ends of relay K1 coils, the alarm of red alarm lamp LED1 flickers at this time
The normally-closed contact of the faulty electric arc of power distribution cabinet electric equipment while string in power distribution cabinet power switch repeat circuit K1 disconnects, automatically
Cut off power distribution cabinet power switch.
When the utility model is specifically used, when distribution in-cabinet temperature changes, the resistance value hair of thermistor RT1, RT2
Changing, so as to which resistance R1 and thermistor RT1, RT2 bleeder circuit formed change, i.e., through capacitance C1, resistance R2 and
The rc filter circuit of resistance R3, capacitance C2 composition is sent to operational amplifier A R1, capacitance C3, resistance after filtering clutter interference
R4, R5, R6, R7 composition circuit and square-wave generate square-wave signal, after through operational amplifier A R2, capacitance C4, resistance R9, R10 group
Into differential circuit, when square-wave signal is in the unit interval（15S）Interior mutation（2500 DEG C of raising）When, i.e., square wave mutates
When, high level is exported, low level is otherwise exported, is exported after the voltage-stabiliser tube ZD1 of reverse parallel connection, voltage-stabiliser tube ZD2 voltage stabilizings；Electric current is mutual
Enter resistance R11, operation amplifier after the filter circuit filtering that the current signal of sensor output detection is formed through inductance L1, capacitance C5
The in-phase proportion amplifying circuit that device AR3, resistance R12, resistance R13 are formed, later into the homophase input of operational amplifier A R4
End, the inverting input threshold voltage with operational amplifier A R4（The corresponding voltage of 0.3A threshold currents）It is compared, works as operation
When the homophase input terminal voltage of amplifier AR4 is less than anti-phase input terminal voltage, operational amplifier A R4 output high level is otherwise defeated
Go out low level；When detecting electric current or temperature and being high level, can make NMOS tube T1 or T2 conducting in logic judging circuit,
PMOS tube T3 or T4 end, and export high level effective information, driving triode Q1 conductings, the flicker of red alarm lamp, relay K1
Coil obtains electric, automatically cuts off power distribution cabinet power switch, efficiently solves current power distribution cabinet operation data failure electric arc, no
Easily by timely analysis, processing the problem of.
The above is to combine specific embodiment further detailed description of the utility model, it is impossible to assert this
Utility model specific implementation is limited only to this；For belonging to the utility model and for those skilled in the technology concerned,
The expansion made under the premise of technical solutions of the utility model thinking and operating method, the replacement of data, should all fall
Within scope of protection of the utility model.
Claims (3)
1. a kind of fault arc detection device, including temperature detection modulate circuit, current detecting modulate circuit, logic judgment electricity
Road, power distribution cabinet switch driving circuit, which is characterized in that the temperature detection modulate circuit, current detecting modulate circuit are all connected with
Logic judging circuit, logic judging circuit is with the electric cabinet power switch driving circuit of connection；
The temperature detection modulate circuit includes thermistor RT1, RT2, one end connection ground of thermistor RT2, thermistor
One end of the other end connection thermistor RT1 of RT2, the other end of thermistor RT1 connect one end of resistance R1, ground connection respectively
One end of capacitance C1, one end of ground resistance R2, resistance R3 one end, resistance R1 the other end connection power supply+5V, resistance R3's
The other end connects one end of the inverting input of operational amplifier A R1, one end of ground capacity C3, resistance R4 respectively, and operation is put
One end of the in-phase input end connection resistance R5 of big device AR1, the other end of resistance R5 connect the lower end of resistance R7, ground connection electricity respectively
One end of R8, one end of the output terminal connection resistance R6 of operational amplifier A R2 are hindered, the other end of resistance R6 connects resistance R7 respectively
Upper end, capacitance C4 one end, the other end of capacitance C4 connects the inverting input of operational amplifier A R2, resistance R9 respectively
One end, for the in-phase input end of operational amplifier A R2 by resistance R10 connections ground, the other end of resistance R9 connects voltage-stabiliser tube respectively
The anode of ZD1, the cathode of voltage-stabiliser tube ZD2；
The current detecting modulate circuit includes current transformer J1, and the pin 1 of current transformer J1 connects power supply+12V, electric current
The pin 3 of mutual inductor J1 connects power supply -12V, and the pin 2 of current transformer J1 connects one end of inductance L1, and inductance L1's is another
The one end for connecting ground capacity C5 respectively, one end of resistance R11 are held, the other end connection operational amplifier A R3's of resistance R11 is same
Phase input terminal, the inverting input of operational amplifier A R3 connect respectively one end of ground resistance R12, resistance R13 one end, electricity
The other end of resistance R13 connects the in-phase input end of the output terminal of operational amplifier A R3, operational amplifier A R4, operation amplifier respectively
The inverting input of device AR4 connect respectively one end of resistance R14, resistance R15 one end, resistance R15 the other end connection current potential
The upper end of device RP1, the lower end of potentiometer RP1 and adjustable end connect ground, the other end connection power supply+5V of resistance R14.
2. a kind of fault arc detection device according to claim 1, which is characterized in that the logic judging circuit includes
The grid of metal-oxide-semiconductor T1-T4, metal-oxide-semiconductor T1, T3 connect the anode of the cathode of voltage-stabiliser tube ZD1, voltage-stabiliser tube ZD2, the grid of metal-oxide-semiconductor T2, T4
The output terminal of steady operational amplifier A R4 is connect, the source electrode of metal-oxide-semiconductor T3 meets power supply+5V, and the drain electrode of metal-oxide-semiconductor T1, T2 connect metal-oxide-semiconductor T4's
Drain electrode, the source electrode of metal-oxide-semiconductor T4 connect the drain electrode of metal-oxide-semiconductor T3, the source electrode ground connection of metal-oxide-semiconductor T1, T2.
3. a kind of fault arc detection device according to claim 1, which is characterized in that the power distribution cabinet power switch drives
Dynamic circuit includes triode Q2, the drain electrode of the base stage connection metal-oxide-semiconductor T4 of triode Q2, the emitter connection ground of triode Q2, and three
The collector of pole pipe Q2 connects the cathode of the anode of diode D1, one end of relay K1 coils, red alarm lamp LED1 respectively,
The cathode of diode D1, the other end of relay K1 coils are all connected with power supply+12V, and the anode of red alarm lamp LED1 passes through electricity
The normally-closed contact string of R16 connections power supply+12V, relay K2 are hindered in power distribution cabinet power switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721879035.2U CN207586360U (en) | 2017-12-28 | 2017-12-28 | A kind of fault arc detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721879035.2U CN207586360U (en) | 2017-12-28 | 2017-12-28 | A kind of fault arc detection device |
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| Publication Number | Publication Date |
|---|---|
| CN207586360U true CN207586360U (en) | 2018-07-06 |
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ID=62740293
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721879035.2U Expired - Fee Related CN207586360U (en) | 2017-12-28 | 2017-12-28 | A kind of fault arc detection device |
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| CN (1) | CN207586360U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110012101A (en) * | 2019-04-09 | 2019-07-12 | 杭州美开电气有限公司 | A kind of power distribution cabinet system of fire hazard monitoring |
| CN110376489A (en) * | 2019-08-13 | 2019-10-25 | 南京东博智慧能源研究院有限公司 | A kind of intelligent distribution network fault electric arc detection system |
| CN110554289A (en) * | 2019-10-14 | 2019-12-10 | 河南理工大学 | Low-voltage series fault arc detection system |
| CN111289875A (en) * | 2020-02-29 | 2020-06-16 | 苏州浪潮智能科技有限公司 | Logic circuit fault detection device and method |
| CN114400625A (en) * | 2022-02-28 | 2022-04-26 | 滨州市通联电器有限公司 | Detection and linkage control device of distribution box |
| CN114660500A (en) * | 2022-05-19 | 2022-06-24 | 秦皇岛广控科技有限公司 | Three-phase monitoring protection system |
-
2017
- 2017-12-28 CN CN201721879035.2U patent/CN207586360U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110012101A (en) * | 2019-04-09 | 2019-07-12 | 杭州美开电气有限公司 | A kind of power distribution cabinet system of fire hazard monitoring |
| CN110376489A (en) * | 2019-08-13 | 2019-10-25 | 南京东博智慧能源研究院有限公司 | A kind of intelligent distribution network fault electric arc detection system |
| CN110554289A (en) * | 2019-10-14 | 2019-12-10 | 河南理工大学 | Low-voltage series fault arc detection system |
| CN111289875A (en) * | 2020-02-29 | 2020-06-16 | 苏州浪潮智能科技有限公司 | Logic circuit fault detection device and method |
| CN111289875B (en) * | 2020-02-29 | 2022-12-16 | 苏州浪潮智能科技有限公司 | Logic circuit fault detection device and method |
| CN114400625A (en) * | 2022-02-28 | 2022-04-26 | 滨州市通联电器有限公司 | Detection and linkage control device of distribution box |
| CN114400625B (en) * | 2022-02-28 | 2023-09-22 | 滨州市通联电器有限公司 | Detection and linkage control device of distribution box |
| CN114660500A (en) * | 2022-05-19 | 2022-06-24 | 秦皇岛广控科技有限公司 | Three-phase monitoring protection system |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180706 Termination date: 20191228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |