CN108711827A - Leakage circuit breakers signal processing apparatus - Google Patents
Leakage circuit breakers signal processing apparatus Download PDFInfo
- Publication number
- CN108711827A CN108711827A CN201810393230.7A CN201810393230A CN108711827A CN 108711827 A CN108711827 A CN 108711827A CN 201810393230 A CN201810393230 A CN 201810393230A CN 108711827 A CN108711827 A CN 108711827A
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- Prior art keywords
- resistance
- transporting discharging
- integrated transporting
- capacitance
- resistor
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- 238000007599 discharging Methods 0.000 claims abstract description 41
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000006378 damage Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Engineering & Computer Science (AREA)
- Artificial Intelligence (AREA)
- Evolutionary Computation (AREA)
Abstract
The present invention relates to a kind of leakage circuit breakers signal processing apparatus.Its main feature is that it includes the signal processing circuit being made of creepage mutual inductor, buckle releaser, several integrated transporting dischargings, diode and some resistance, capacitance.The controller that the present invention changes well known leakage circuit breakers is detected judgement using microcontroller, but the detection of leakage current is completed by soft copies such as resistance, integrated circuits；Cost can be reduced, while the signal acquired is more stable, judged and accuracy of action, reliability higher；Than saving space using the buckle releaser of microcontroller, it is more easy to realize the requirement that leakage circuit breakers is small.
Description
Technical field
The invention belongs to a kind of leakage circuit breakers, more particularly to a kind of leakage circuit breakers signal processing apparatus.
Background technology
Low-voltage circuit breaker is used for main distribution electric energy and protection circuit in distribution network, prevent power-supply device by
The harm of the failures such as load, under-voltage, short circuit, single-phase earthing.And leakage circuit breakers is in distribution line and electrical equipment, as people
Body electrical shock protection is used, it is also possible to prevent apparatus insulated damage, generate the harm such as earth fault.Because of currently the majority low pressure
Breaker is all intelligent electric appliance, and leakage circuit breakers is same, is all using microprocessor by detecting leakage current signal come real
It is existing earth leakage protective.There are many microprocessor benefit, but cost is also high, write program and need secondary cost, and program is run
When be also susceptible to race fly phenomenon.
Invention content
The present invention for solve known technology present in technical problem provide it is a kind of it is at low cost, acquisition signal it is more steady
It is fixed, judge the leakage circuit breakers signal processing apparatus high with accuracy of action, reliability.
The present invention is adopted the technical scheme that solve technical problem present in known technology：It includes that electric leakage is mutual
Sensor, buckle releaser, the both ends of the creepage mutual inductor (ZCT) output termination first resistor (R1) and the first capacitance (C1), institute
State one end of termination second resistance one end (R2) and 3rd resistor (R3) of the first capacitance (C1)；First capacitance (C1)
The other end is grounded；The negative input of the first integrated transporting discharging of another termination (U1) of the second resistance (R2), first collection
One end of the 4th resistance (R4) is connect simultaneously at the negative input of amplifier (U1), described in another termination of the 4th resistance (R4)
The output end of first integrated transporting discharging (U1)；The negative sense of the second integrated transporting discharging of another termination (U2) of the 3rd resistor (R3) inputs
End, while second integrated transporting discharging (U2) negative input connects the cathode terminal of diode (D1) and first integrated transporting discharging
(U1) positive input；The anode of the diode (D1) connects the output end of second integrated transporting discharging (U2), the 5th resistance
(R5) positive input of a termination integrated transporting discharging (U2), another terminal ground potential of the 5th resistance (R5)；The
The output end of one termination first integrated transporting discharging (U1) of seven resistance (R7), the another termination third of the 7th resistance (R7)
The positive input of integrated transporting discharging (U3), while one end of the second capacitance (C2) is connect, another termination of second capacitance (C2)
Ground；One end of 6th resistance (R6) connects the negative input of third integrated transporting discharging (U3) with one end of the 8th resistance (R8) simultaneously,
The other end of 6th resistance (R6) is grounded, another termination third integrated transporting discharging (U3) of the 8th resistance (R8)
Output end, while being connect with one end of the 9th resistance (R9), the 4th integrated transporting discharging of another termination of the 9th resistance (R9)
(U4) positive input, while being connected with one end of one end of the tenth resistance (R10) and third capacitance (C3), the tenth electricity
Hinder the other end ground connection of (R10) and the third capacitance (C3)；One end of eleventh resistor (R11) and twelfth resistor (R12)
One end connect and connect with the negative input of the 4th integrated transporting discharging (U4), the eleventh resistor (R11) it is another
Termination power+5V, the other end ground connection of the twelfth resistor (R12), the described 4th；The output termination the of integrated transporting discharging (U4)
One end of 13 resistance (R13), one end of the 14th resistance (R14) of another termination of the thirteenth resistor (R13), while with
The buckle releaser connection, the other end ground connection of the 14th resistance (R14).
The invention has the advantages and positive effects that：1, the controller of well known leakage circuit breakers is all to use microcontroller
It is detected judgement, and the present invention is then that the detection of leakage current is completed by soft copies such as resistance, integrated circuits, in this way
To reduce cost, while more stable using the signal of soft copy overlapped circuit acquisition, judge and accuracy of action, reliability
It greatly improves；2 be to save space than using the buckle releaser of microcontroller using soft copy overlapped circuit trip device, then leaking electricity
Breaker can protrude small feature.
Description of the drawings
Fig. 1 is the electrical schematic diagram of the present invention.
Specific implementation mode
For that can further appreciate that present disclosure, feature and effect, the following examples are hereby given, and coordinates attached drawing detailed
It is described as follows：
As shown, the both ends of creepage mutual inductor ZCT outputs terminating resistor R1 and capacitance C1, a terminating resistor of capacitance C1
One end of the one end R2 and resistance R3；The negative input of another termination integrated transporting discharging U1 of resistance R2, the negative sense of integrated transporting discharging U1
One end of input terminal while connecting resistance R4, the output end of another termination integrated transporting discharging U1 of resistance R4；Another termination of resistance R3
The negative input of integrated transporting discharging U2, at the same U2 negative inputs connect diode D1 cathode terminal and integrated transporting discharging U1 forward direction it is defeated
Enter end；The anode of diode D1 connects the output end of integrated transporting discharging U2, and the one of resistance R5 terminates the positive input of integrated transporting discharging U2,
Another terminal ground potential of resistance R5；The output end of a termination integrated transporting discharging U1 of resistance R7, a termination another resistance R7 are integrated
The positive input of amplifier U3, while one end of capacitance C2 is connect, the other end ground connection of capacitance C2；One end of resistance R6 and resistance R8
One end connect the negative input of integrated transporting discharging U3, the other end ground connection of resistance R6, the integrated fortune of another termination of resistance R8 simultaneously
The output end of U3 is put, while being connect with one end of resistance R9, the positive input of another termination integrated transporting discharging U4 of resistance R9, together
When be connected with one end of one end of resistance R10 and capacitance C3, the other end of resistance R10 and capacitance C3 ground connection；One end of resistance R11
Connected with one end of resistance R12 and with the negative input of integrated transporting discharging U4, another termination power+5V of resistance R11, resistance
The other end of R12 is grounded.One end of the output terminating resistor R13 of integrated transporting discharging U4, another terminating resistor R14's of resistance R13
One end, while being connect with buckle releaser, the other end ground connection of resistance R14.
The principle of the present invention implementation procedure：The electric leakage signal induced from creepage mutual inductor becomes voltage by resistance R3
Then signal becomes smoother sine wave, Ui> after capacitance C1 filtering;When 0, Uo2<0, diode D cut-offs, therefore Up1
=Un2=Ui makes iR1=iR2=0, thus Uo=Ui.Work as Ui<When 0, Uo>0, diode D cut-offs, therefore Up1=Un2=Up2
=0, it is virtual earth, therefore Uo=-R2/R1*Ui=-Ui, therefore Uo=|Ui|, Ui inputs smooth sine voltage signal by processing
What Uo was obtained afterwards is all positive voltage signal, and the amplifying circuit voltage signal by R6, R7, R8 and integrated transporting discharging U3 compositions amplifies
Afterwards, after resistance R9 and resistance R10 partial pressures, required voltage signal is obtained；Resistance R11 and resistance R12 partial pressures, voltage signal N3
As the reference voltage of comparator U4, when P3 voltage signals are more than N3 reference voltages, comparator U4 will export high level, pass through
Pull down resistor R13 and resistance R14 ensures that stable voltage signal drives buckle releaser.
Claims (1)
1. a kind of leakage circuit breakers signal processing apparatus, it includes creepage mutual inductor, buckle releaser, it is characterized in that：The leakage
The both ends of electric mutual inductor (ZCT) output termination first resistor (R1) and the first capacitance (C1), one end of first capacitance (C1)
Connect one end of second resistance one end (R2) and 3rd resistor (R3)；The other end of first capacitance (C1) is grounded；Described second
The negative input of the first integrated transporting discharging of another termination (U1) of resistance (R2), the negative sense input of first integrated transporting discharging (U1)
End while connecing one end of the 4th resistance (R4), another termination first integrated transporting discharging (U1) of the 4th resistance (R4) it is defeated
Outlet；The negative input of the second integrated transporting discharging of another termination (U2) of the 3rd resistor (R3), while described second is integrated
Amplifier (U2) negative input connects the positive input of the cathode terminal and first integrated transporting discharging (U1) of diode (D1)；It is described
The anode of diode (D1) connects the output end of second integrated transporting discharging (U2), the termination integrated fortune of the 5th resistance (R5)
Put the positive input of (U2), another terminal ground potential of the 5th resistance (R5)；Described in one termination of the 7th resistance (R7)
The output end of first integrated transporting discharging (U1), the positive input of the another termination third integrated transporting discharging (U3) of the 7th resistance (R7)
End, while one end of the second capacitance (C2) is connect, the other end ground connection of second capacitance (C2)；One end of 6th resistance (R6) with
One end of 8th resistance (R8) connects the negative input of third integrated transporting discharging (U3), the other end of the 6th resistance (R6) simultaneously
Ground connection, the output end of another termination third integrated transporting discharging (U3) of the 8th resistance (R8), while with the 9th resistance
(R9) one end connection, the positive input of the 4th integrated transporting discharging (U4) of another termination of the 9th resistance (R9), while with
One end of tenth resistance (R10) is connected with one end of third capacitance (C3), the tenth resistance (R10) and the third capacitance
(C3) other end ground connection；One end of eleventh resistor (R11) and the connection of one end of twelfth resistor (R12) and with the described 4th
The negative input of integrated transporting discharging (U4) connects, another termination power+5V of the eleventh resistor (R11), and the described 12nd
The other end of resistance (R12) is grounded, and the described 4th；One end of the output termination thirteenth resistor (R13) of integrated transporting discharging (U4), institute
One end of the 14th resistance (R14) of another termination of thirteenth resistor (R13) is stated, while being connect with the buckle releaser, it is described
The other end of 14th resistance (R14) is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810393230.7A CN108711827B (en) | 2018-04-27 | 2018-04-27 | Signal processing device of leakage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810393230.7A CN108711827B (en) | 2018-04-27 | 2018-04-27 | Signal processing device of leakage circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108711827A true CN108711827A (en) | 2018-10-26 |
| CN108711827B CN108711827B (en) | 2023-11-24 |
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ID=63867554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810393230.7A Active CN108711827B (en) | 2018-04-27 | 2018-04-27 | Signal processing device of leakage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108711827B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247489A (en) * | 2013-05-16 | 2013-08-14 | 天津市百利电气有限公司 | Circuit breaker electronic release free of grounding current sampling special instrument transformer |
| CN103683186A (en) * | 2012-09-05 | 2014-03-26 | 上海精翊电器有限公司 | Residual current breaker with self-tuning function |
| WO2016019642A1 (en) * | 2014-08-07 | 2016-02-11 | 中兴通讯股份有限公司 | Device for preventing current from flowing backward |
| CN106094964A (en) * | 2016-08-19 | 2016-11-09 | 天津市百利电气有限公司 | There is the microprocessor of electric energy sampling differential amplifier circuit |
| CN208386126U (en) * | 2018-04-27 | 2019-01-15 | 天津市百利电气有限公司 | Leakage circuit breakers executive device |
-
2018
- 2018-04-27 CN CN201810393230.7A patent/CN108711827B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683186A (en) * | 2012-09-05 | 2014-03-26 | 上海精翊电器有限公司 | Residual current breaker with self-tuning function |
| CN103247489A (en) * | 2013-05-16 | 2013-08-14 | 天津市百利电气有限公司 | Circuit breaker electronic release free of grounding current sampling special instrument transformer |
| WO2016019642A1 (en) * | 2014-08-07 | 2016-02-11 | 中兴通讯股份有限公司 | Device for preventing current from flowing backward |
| CN106094964A (en) * | 2016-08-19 | 2016-11-09 | 天津市百利电气有限公司 | There is the microprocessor of electric energy sampling differential amplifier circuit |
| CN208386126U (en) * | 2018-04-27 | 2019-01-15 | 天津市百利电气有限公司 | Leakage circuit breakers executive device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108711827B (en) | 2023-11-24 |
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