CN107579505A - Use electric detection means - Google Patents
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- CN107579505A CN107579505A CN201610518704.7A CN201610518704A CN107579505A CN 107579505 A CN107579505 A CN 107579505A CN 201610518704 A CN201610518704 A CN 201610518704A CN 107579505 A CN107579505 A CN 107579505A
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- signal
- electric leakage
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- detection means
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Abstract
This disclosure relates to one kind electric detection means, including：Self-test unit, electric leakage signal is simulated for activating；Leak current fault detection unit, for detecting simulation electric leakage signal and true electric leakage signal, simulation electric leakage signal and true electric leakage signal in it is at least one in the presence of, leak current fault detection unit activates trigger signal, in the case where simulation electric leakage signal and true electric leakage signal are all not present, leak current fault detection unit makes trigger signal be in unactivated state；Self-checking feedback closing unit, for detecting trigger signal, in the case where detecting trigger signal, self-checking feedback closing unit makes simulation electric leakage signal be in unactivated state before predetermined instant；And power supply switching units, for detecting trigger signal after predetermined instant, in the case where detecting trigger signal, power supply switching units deenergization.In addition, the disclosure further relates to a kind of electric connecting device.The disclosure avoids interference and influence of the simulation electric leakage signal on true electric leakage signal.
Description
Technical field
This disclosure relates to domestic circuit field, in particular it relates to which a kind of use electro-detection with electric detection means and with this
The electric connecting device of device.
Background technology
As what the continuous improvement and electric equipment products of people's living standard used becomes increasingly popular, people make to electrical equipment
Also increasingly paid attention to safety.Therefore the earth detector with defencive function arises at the historic moment.Currently, one kind is had been devised by
Be provided simultaneously with the relay system of detection of electrical leakage and self-checking function uses electric detection means.
The content of the invention
In this use electric detection means for being provided simultaneously with detection of electrical leakage and self-checking function, self-test signal can be to real leakage
Electric signal produces interference and influenceed.For example, self-test signal can be superimposed or offset with real electric leakage signal.In order to avoid this
Phenomenon, present disclose provides a kind of electric connecting device with electric detection means and with this with electric detection means.This uses electro-detection
Device enables to earth leakage detection functions and self-checking function not to interfere with each other.
To achieve the above object, the first aspect of the disclosure provides a kind of all electric detection means, including：Self-test unit,
Electric leakage signal is simulated for activating；Leak current fault detection unit, for detecting the simulation electric leakage signal and true electric leakage signal,
In the presence of at least one in the simulation electric leakage signal and the true electric leakage signal, the leak current fault detection
Unit activating trigger signal, in the case where the simulation electric leakage signal and the true electric leakage signal are all not present, the leakage
Electric fault detection unit makes the trigger signal be in unactivated state；Self-checking feedback closing unit, for detecting the triggering
Signal, in the case of the trigger signal is detected, the self-checking feedback closing unit makes the simulation before predetermined instant
Electric leakage signal is in unactivated state；And power supply switching units, for detecting the triggering letter after the predetermined instant
Number, in the case where detecting the trigger signal, the power supply switching units deenergization.
By the above-mentioned means, it can just detect whether exist truly after making simulation electric leakage signal be in unactivated state
Electric leakage signal and deenergization is chosen whether accordingly.Therefore, simulate electric leakage signal without interference with influence true electric leakage signal,
This improves electrical safety.
In a kind of embodiment with electric detection means according to the disclosure, the self-test unit periodically activates institute
State simulation electric leakage signal.Periodic circuitry self test is realized through the above way.
In a kind of embodiment with electric detection means according to the disclosure, the self-test unit includes：Reference voltage
Subelement is generated, for generating reference voltage；Periodic voltage generates subelement, for generating the voltage of mechanical periodicity, the week
Different phase of the voltage of phase change in the cycle is respectively greater than and less than the reference voltage；Comparator, for comparing
State the voltage of reference voltage and the mechanical periodicity；And the first transistor, described in being produced according to the result of the comparison
Simulate electric leakage signal.
In a kind of embodiment with electric detection means according to the disclosure, the periodic voltage generation subelement includes
The first resistor being connected in series and the first capacitor.
In a kind of embodiment with electric detection means according to the disclosure, the self-checking feedback closing unit includes the
Two-transistor, the control pole of the second transistor is connected with the leak current fault detection unit, and second transistor leads to
Its positive pole and negative pole is crossed to be connected in parallel with first capacitor.By the above-mentioned means, made by the closure of second transistor
Simulation electric leakage signal is in unactivated state.
In a kind of embodiment with electric detection means according to the disclosure, the self-test unit also includes self test failure
Subelement is activated, it is used to activate self test failure signal in the case where self test failure occurs；The power supply switching units according to
The self test failure signal deenergization.By the above-mentioned means, can when self test failure occurs timely deenergization.
In a kind of embodiment with electric detection means according to the disclosure, the leak current fault detection unit includes：
Detection coil, for detecting the simulation electric leakage signal and the true electric leakage signal；And processor, for according to the inspection
The testing result of test coil activates the trigger signal or the trigger signal is in unactivated state.
In a kind of embodiment with electric detection means according to the disclosure, the power supply switching units include delay
Unit, it causes the power supply switching units just to detect the trigger signal after the predetermined instant.By the above-mentioned means,
Detection of the power supply switching units to trigger signal is by delay, so as to have enough time so that simulation leakage before the detection
Electric signal is in unactivated state.
In a kind of embodiment with electric detection means according to the disclosure, the delay subelement is implemented as RC electricity
Road.By the above-mentioned means, delay feature is realized in a straightforward manner.
In a kind of embodiment with electric detection means according to the disclosure, the power supply switching units include trip line
Circle or relay.
In a kind of embodiment with electric detection means according to the disclosure, the power supply switching units include at least one
Individual transistor, to activate the tripping coil or the relay or make the tripping coil or the relay be in non-and swash
State living.
In addition, the second aspect of the disclosure provides a kind of electric connecting device, it has electricity consumption according to the present disclosure
Detection means.
To sum up, the disclosure avoids simulation leakage by the way that self-checking function and earth leakage detection functions are isolated in time
Interference and influence of the electric signal on true electric leakage signal.Therefore, true electric leakage signal can be detected exactly with electric detection means,
This improves electrical safety.
Brief description of the drawings
By reading the detailed description to non-limiting example made with reference to the following drawings, other spies of the disclosure
Sign, objects and advantages will become more apparent upon, wherein：
Fig. 1 shows the schematical structured flowchart with electric detection means according to the disclosure；
Fig. 2 shows the electrical block diagram of the first embodiment with electric detection means according to the disclosure；
Fig. 3 shows the electrical block diagram of the second embodiment with electric detection means according to the disclosure；And
Fig. 4 shows the electrical block diagram of the 3rd embodiment with electric detection means according to the disclosure.
Through all accompanying drawings, same or similar figure elements are represented with same or similar reference.
Embodiment
The principle of the disclosure is illustrated now with reference to the various exemplary embodiments shown in accompanying drawing.It should manage
Solution, the descriptions of these embodiments is just to causing those skilled in the art better understood when and further realize this public affairs
Open, and be not intended to limit the scope of the present disclosure in any way.It should be noted that it can make under possibilities in figure
With similar or identical reference, and similar or identical reference can represent similar or identical function.Ability
The technical staff in domain will readily appreciate that from the following description, the replacement of structures and methods illustrated here is implemented
Example can be used without departing from the principle by the disclosure described herein.
Fig. 1 shows the schematical structured flowchart with electric detection means according to the disclosure.
As shown in figure 1, with electric detection means include power subsystem 1, power supply switching units 2, leak current fault detection unit 3,
Self-test unit 4 and self-checking feedback closing unit 5.
The activation simulation electric leakage signal of self-test unit 4.
The detection simulation electric leakage signal and true electric leakage signal of leak current fault detection unit 3, here, in simulation electric leakage signal and
In the presence of at least one in true electric leakage signal, leak current fault detection unit 3 activates trigger signal, is leaked electricity in simulation
In the case that signal and true electric leakage signal are all not present, leak current fault detection unit 3 makes the trigger signal be in inactive shape
State.
Self-checking feedback closing unit 5 detects trigger signal, and in the case where detecting trigger signal, self-checking feedback is closed single
Member 5 makes simulation electric leakage signal be in unactivated state before predetermined instant.
Power supply switching units 2 detect trigger signal after the predetermined instant, and are detecting the situation of trigger signal
Lower deenergization.
Fig. 2 shows the electrical block diagram of the first embodiment with electric detection means according to the disclosure.
As shown in Fig. 2 power supply switching units 2 include：Tripping coil SOL, power switch SW1, thyristor Q1 and Q2,
Resistance R4 and R14, LED 1., it is understood that thyristor Q1 also can possess switching function with other
Element replace, such as metal-oxide-semiconductor.Here, set by two thyristors Q1 and Q2 redundancy to ensure tripping coil SOL
Activation and power switch SW1 shut-off.However, the thyristor of other quantity is also within the protection domain of the disclosure.
Leak current fault detection unit 3 includes：The elements such as detection coil ZCT1, diode D5 and processor IC1.
Self-test unit 4 includes：Reference voltage generation subelement, periodic voltage generation subelement, comparator IC2 and first are brilliant
Body pipe Q4.Wherein, reference voltage generation subelement is used to generate reference voltage；Periodic voltage generation subelement is used to generate the cycle
The voltage of change, the different phase of the voltage of the mechanical periodicity in the cycle are respectively greater than and less than reference voltage；Comparator, it is used for
The voltage of comparison reference voltage and mechanical periodicity；And the first transistor Q4, for producing simulation electric leakage according to result of the comparison
Signal.In Fig. 1, reference voltage generation subelement is formed by R7 and the R8 bleeder circuit formed.Periodic voltage generates subelement
Formed by the first resistor R9 and the first capacitor C10 that are connected in series.Electric leakage signal is simulated to be more than electric leakage threshold on zero line N
The leakage current of value.
Self-checking feedback closing unit 5 includes：Second transistor Q3 and it is connected with second transistor Q3 control pole
Resistance R15.Second transistor Q3 control pole is connected by resistance R15 with leak current fault detection unit 3, and the second crystal
Pipe Q3 is connected in parallel by its positive pole and negative pole with the first capacitor C10.
In Fig. 1, detection coil ZCT1 both ends are coupled to processor IC1 pin 1 and 4, when detection coil ZCT1 is defeated
When the voltage change gone out is more than threshold value, processor IC1 pin 5 exports high level, otherwise, exports low level.Bridge circuit D1-
D4 is respectively coupled to live wire L, N line, and processor IC1 pin 6 is coupled to by resistance R1, with positive and negative the half of alternating voltage
Zhou Junneng provides working power for processor IC1.
In some embodiments of the present disclosure, this can also include power subsystem 1 with electric detection means, and it is used for for the use
Electric detection means is powered.The power subsystem 1 includes bridge circuit D1-D4.
In some embodiments of the present disclosure, self-test unit 4 also includes self test failure activation subelement, self test failure activation
Subelement is for example including resistance R12 and electric capacity C11.Self test failure is occurring, is persistently being charged to electric capacity C11 by resistance R12, with
Activate self test failure signal.And power supply switching units 2 can be according to the self test failure signal deenergization.
In some embodiments of the present disclosure, power supply switching units 2 include delay subelement, and it is implemented as including
Resistance R14 and electric capacity C5 RC circuits.
After reset switch RESET resets, for L, N supply lines by upper electricity, the ac power waveform between L lines and N lines is just
String ripple.
Below to power supply switching units 2, leak current fault detection unit 3, self-test unit 4 and self-checking feedback closing unit 5
Operation principle is illustrated.
True electric leakage signal will not be produced in circuit under normal circumstances.Now, when power switch SW1 closures, input
LINE turns on load LOAD.When power supply is powered, the first capacitor C10 is charged by first resistor R9 in self-test unit 4,
When current potential is charged to the negative pole pre-set value higher than comparator IC2, comparator IC2 overturns and exports high potential, makes the first crystalline substance
Body pipe Q4 is turned on, and provides the leakage current of simulation after the first transistor Q4 conductings to detection coil ZCT1, processor IC1's draws
Pin 5 exports trigger signal.Here, transistor Q1, Q2 and Q3 can obtain trigger signal.However, second transistor Q3 can be first
Conducting, and transistor Q1 and Q2 can lag conducting due to resistance R14 and electric capacity C5 limit.After second transistor Q3 conductings, short circuit
First capacitor C10, so that the current potential on the first capacitor C10 reduces rapidly, comparator IC2 anodic potentials reduce,
Comparator IC2 is closed, and the first transistor Q4 is closed, so as to stop that the self-test signal of simulation is provided to leak current fault detection unit 3,
When comparator IC2 is closed, processor IC1 pin 5 also stops the activation of trigger signal, so as to which second transistor Q3 disconnects.
First resistor R9 in self-checking circuit 4 starts to charge to the first capacitor C10 again, so as to realize next cycle self-test.
When there are drain conditions, detection coil ZCT1 detects leakage current, the processor IC1 output triggering of pin 5
Signal.Now, second transistor Q3 turns on prior to transistor Q1 and Q2.Therefore, occurs simulation leakage current and true at the same time
In the case of leakage current, because second transistor Q3 is first turned on, comparator IC2 can be closed, so as to avoid simulating leakage current
Influence to true leakage current.After simulation leakage current is in unactivated state, transistor Q1 and Q2 are just turned on, so as to
Tripping coil SOL obtains electric, power switch SW1 disconnections, to disconnect input LINE and load LOAD, so as to protect personal or property peace
Entirely.
And when there is self test failure, such as when electric capacity C1 or detection coil ZCT1 short circuits, if passing through first resistor R9
The first capacitor C10 chargings are given, when being charged to the negative terminal current potential higher than comparator IC2, comparator IC2 can export high potential, make the
One transistor Q4 is turned on.However, due to electric capacity C1 or detection coil ZCT1 short circuits, detection coil ZCT1 can't detect simulation electric leakage
Electric current, therefore processor IC1 pin 5 is low potential, so as to turn on second transistor Q3, the first capacitor C10
The current potential for being is consistently higher than comparator IC2 negative terminal, and comparator IC2 exports high potential for a long time.Now, resistance R12 gives electric capacity C11
Charging, triggers transistor Q1, Q2 conducting after diode D7 conductings, tripping coil SOL obtains electric, power switch SW1 disconnections, so as to disconnected
Input LINE and load LOAD are opened.
Fig. 3 shows the electrical block diagram of the second embodiment with electric detection means according to the disclosure.Fig. 3 and figure
2 main distinction is to substitute tripping coil SOL using relay RELAY, and employ two detection coil RING1 and
RING2.Make it that the detection to leakage current is more accurate by using two detection coils.
Fig. 4 shows the electrical block diagram of the 3rd embodiment with electric detection means according to the disclosure.Fig. 4 and figure
3 main distinction is to add manual reset circuit.So as to when causing power supply to disconnect due to self test failure or leak current fault
When, manually closed reduction button RESET electric current can be made to rework.
Although claims are formulated for the particular combination of feature in this application, but it is to be understood that this public affairs
The scope opened also includes disclosed herein explicitly or implicitly or to any of any novel feature of its any summary or feature
Novel combination, no matter whether it is related to the same approach in current any claim claimed.Applicant is accordingly
Inform, new claim can be in the checking process of the application or by being formulated in its derivative any further application
Into the combination of these features and/or these features.
Claims (12)
1. one kind electric detection means, including：
Self-test unit, electric leakage signal is simulated for activating；
Leak current fault detection unit, for detecting the simulation electric leakage signal and true electric leakage signal, in the simulation electric leakage letter
Number and the true electric leakage signal in it is at least one in the presence of, the leak current fault detection unit activation triggering letter
Number, in the case where the simulation electric leakage signal and the true electric leakage signal are all not present, the leak current fault detection unit
The trigger signal is set to be in unactivated state；
Self-checking feedback closing unit, for detecting the trigger signal, in the case where detecting the trigger signal, it is described from
Inspection feedback closing unit makes the simulation electric leakage signal be in unactivated state before predetermined instant；And
Power supply switching units, for detecting the trigger signal after the predetermined instant, detecting the trigger signal
In the case of, the power supply switching units deenergization.
2. according to claim 1 use electric detection means, wherein, the self-test unit periodically activates the simulation leakage
Electric signal.
3. according to claim 2 use electric detection means, wherein, the self-test unit includes：
Reference voltage generates subelement, for generating reference voltage；
Periodic voltage generates subelement, and for generating the voltage of mechanical periodicity, the voltage of the mechanical periodicity is in the cycle
Different phase is respectively greater than and less than the reference voltage；
Comparator, for the reference voltage and the voltage of the mechanical periodicity；And
The first transistor, for producing the simulation electric leakage signal according to the result of the comparison.
4. according to claim 3 use electric detection means, wherein, the periodic voltage generation subelement includes being connected in series
First resistor and the first capacitor.
5. according to claim 4 use electric detection means, wherein, the self-checking feedback closing unit includes the second crystal
Pipe, the control pole of the second transistor is connected with the leak current fault detection unit, and second transistor by it just
Pole and negative pole are connected in parallel with first capacitor.
6. according to claim 1 use electric detection means, wherein, it is single that the self-test unit also includes self test failure activation
Member, it is used to activate self test failure signal in the case where self test failure occurs；
The power supply switching units are according to the self test failure signal deenergization.
7. according to claim 1 use electric detection means, wherein, the leak current fault detection unit includes：
Detection coil, for detecting the simulation electric leakage signal and the true electric leakage signal；And
Processor, for activating the trigger signal according to the testing result of the detection coil or making at the trigger signal
In unactivated state.
8. according to claim 1 use electric detection means, wherein, the power supply switching units include delay subelement, its
So that the power supply switching units just detect the trigger signal after the predetermined instant.
9. according to claim 8 use electric detection means, wherein, the delay subelement is implemented as RC circuits.
10. according to claim 1 use electric detection means, wherein, the power supply switching units include tripping coil or after
Electrical equipment.
11. according to claim 10 use electric detection means, wherein, the power supply switching units include at least one crystal
Pipe, to activate the tripping coil or the relay or make the tripping coil or the relay be in inactive shape
State.
12. a kind of electric connecting device, it is characterised in that have and use electro-detection according to any one of claim 1 to 11
Device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610518704.7A CN107579505B (en) | 2016-07-05 | 2016-07-05 | Use electric detection means |
| US15/209,563 US9857448B1 (en) | 2016-07-05 | 2016-07-13 | Leakage current detection device for appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610518704.7A CN107579505B (en) | 2016-07-05 | 2016-07-05 | Use electric detection means |
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| Publication Number | Publication Date |
|---|---|
| CN107579505A true CN107579505A (en) | 2018-01-12 |
| CN107579505B CN107579505B (en) | 2019-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610518704.7A Active CN107579505B (en) | 2016-07-05 | 2016-07-05 | Use electric detection means |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1835316A (en) * | 2006-02-21 | 2006-09-20 | 通领科技集团有限公司 | Intelligent detecting method and appliance for service stop of electricity leakage protector |
| CN102315621A (en) * | 2010-07-06 | 2012-01-11 | 益而益(集团)有限公司 | Electric wire connection protecting device with self-checking function |
| CN103311884A (en) * | 2013-04-23 | 2013-09-18 | 上海良信电器股份有限公司 | Non-stick overvoltage and under-voltage protector with leakage protection function |
| CN104422830A (en) * | 2013-08-27 | 2015-03-18 | 施耐德电器工业公司 | Leakage protector and leakage protection function detection method |
| CN205945019U (en) * | 2016-07-05 | 2017-02-08 | 苏州益而益电器制造有限公司 | With electric detection means and electric jointing equipment |
-
2016
- 2016-07-05 CN CN201610518704.7A patent/CN107579505B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1835316A (en) * | 2006-02-21 | 2006-09-20 | 通领科技集团有限公司 | Intelligent detecting method and appliance for service stop of electricity leakage protector |
| CN102315621A (en) * | 2010-07-06 | 2012-01-11 | 益而益(集团)有限公司 | Electric wire connection protecting device with self-checking function |
| CN103311884A (en) * | 2013-04-23 | 2013-09-18 | 上海良信电器股份有限公司 | Non-stick overvoltage and under-voltage protector with leakage protection function |
| CN104422830A (en) * | 2013-08-27 | 2015-03-18 | 施耐德电器工业公司 | Leakage protector and leakage protection function detection method |
| CN205945019U (en) * | 2016-07-05 | 2017-02-08 | 苏州益而益电器制造有限公司 | With electric detection means and electric jointing equipment |
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| Publication number | Publication date |
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| CN107579505B (en) | 2019-05-24 |
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