CN107579505B - Use electric detection means - Google Patents
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- CN107579505B CN107579505B CN201610518704.7A CN201610518704A CN107579505B CN 107579505 B CN107579505 B CN 107579505B CN 201610518704 A CN201610518704 A CN 201610518704A CN 107579505 B CN107579505 B CN 107579505B
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Abstract
This disclosure relates to which a kind of use electric detection means, comprising: self-test unit, for activating simulation electric leakage signal；Leak current fault detection unit, for detecting simulation electric leakage signal and true electric leakage signal, in the presence of simulating at least one of electric leakage signal and true electric leakage signal, leak current fault detection unit activation trigger signal, in the case where simulating electric leakage signal and true electric leakage signal is 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 at the scheduled time；And power supply switching units, for detecting trigger signal later at the scheduled time, in the case where detecting trigger signal, power supply switching units disconnect power supply.In addition, present disclosure also relates to a kind of electric connecting devices.The disclosure avoids simulation electric leakage signal to the interference of true electric leakage signal and influence.
Description
Technical field
This disclosure relates to domestic circuit field, and in particular, to a kind of to use electro-detection with electric detection means and with this
The electric connecting device of device.
Background technique
As what the continuous improvement and electric equipment products of people 's material life level used becomes increasingly popular, people make electric appliance
Also increasingly paid attention to safety.Therefore the earth detector with defencive function comes into being.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.
Summary 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 true leakage
Electric signal generates interference and influences.For example, self-test signal can be superimposed or offset with true electric leakage signal.In order to avoid this
Phenomenon, present disclose provides a kind of electric connecting devices 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, comprising: 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 of 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, when detecting the trigger signal, the self-checking feedback closing unit makes the simulation before at the scheduled time
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 disconnect power supply.
By the above-mentioned means, can just detect whether exist really making to simulate after electric leakage signal is in unactivated state
Electric leakage signal and choose whether accordingly disconnect power supply.Therefore, simulation electric leakage signal will not interfere and 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 variation in the period is respectively greater than and is less than the reference voltage；Comparator, for comparing
State the voltage of reference voltage and the mechanical periodicity；And the first transistor, for according to comparison result generation
Simulate electric leakage signal.
In a kind of embodiment with electric detection means according to the disclosure, the periodic voltage generates subelement and includes
The first resistor and first capacitor device of series connection.
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 electrode of the second transistor are connected with the leak current fault detection unit, and second transistor is logical
It crosses its anode and cathode is connected in parallel with the first capacitor device.By the above-mentioned means, being 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 further includes self test failure
Subelement is activated, 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 disconnects power supply.By the above-mentioned means, power supply can be disconnected in time when self test failure occurs.
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 made to be in unactivated state.
In a kind of embodiment with electric detection means according to the disclosure, the power supply switching units include delay
Unit makes the power supply switching units just detect the trigger signal after the predetermined instant.By the above-mentioned means,
Power supply switching units are by delay, to have enough time so that simulation leakage before the detection to the detection of trigger signal
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, realizing delay feature in a simple 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
A transistor is swashed with activating the tripping coil or the relay or the tripping coil or the relay being made to be in non-
State living.
In addition, the second aspect of the disclosure provides a kind of electric connecting device, with electricity consumption according to the present disclosure
Detection device.
To sum up, the disclosure avoids simulation leakage by the way that self-checking function and earth leakage detection functions to be isolated in time
Electric signal is on the interference of true electric leakage signal and influence.Therefore, true electric leakage signal can be accurately detected with electric detection means,
This improves electrical safety.
Detailed description of the invention
By reading the detailed description referring to made by the following drawings to non-limiting embodiment, other spies of the disclosure
Sign, objects and advantages will become more apparent upon, in which:
Fig. 1 shows the schematical structural block diagram with electric detection means according to the disclosure；
Fig. 2 shows the electrical block diagrams according to the first embodiment with electric detection means of 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 attached drawings, same or similar figure elements are indicated with same or similar appended drawing reference.
Specific embodiment
The principle of the disclosure is illustrated now with reference to various exemplary embodiments shown in the drawings.It should manage
Solution, the descriptions of these embodiments is just to better understood when those skilled in the art and further realize this public affairs
It opens, and is not intended to limit the scope of the present disclosure in any way.It should be noted that can make in figure under possibilities
With appended drawing reference similar or identical, and appended drawing reference similar or identical can indicate function similar or identical.Ability
The technical staff in domain will readily appreciate that from the following description, the substitution 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 structural block diagram with electric detection means according to the disclosure.
As shown in Figure 1, with electric detection means include power supply unit 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 of true electric leakage signal, 3 activation trigger signal of leak current fault detection unit leaks 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 at the scheduled time.
Power supply switching units 2 detect trigger signal after the predetermined instant, and the case where detecting trigger signal
Lower disconnection power supply.
Fig. 2 shows the electrical block diagrams according to the first embodiment with electric detection means of 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, Light-emitting diode LED 1., it is understood that thyristor Q1 also can have switching function with other
Element replace, such as metal-oxide-semiconductor.Here, ensuring tripping coil SOL by the redundancy setting of two thyristors Q1 and Q2
Activation and power switch SW1 shutdown.However, the thyristor of other quantity is also within the protection scope 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: that reference voltage generates subelement, periodic voltage generates subelement, comparator IC2 and first is brilliant
Body pipe Q4.Wherein, reference voltage generates subelement for generating reference voltage；Periodic voltage generates subelement for generating the period
The voltage of variation, different phase of the voltage of the mechanical periodicity in the period are respectively greater than and are less than reference voltage；Comparator is used for
The voltage of comparison reference voltage and mechanical periodicity；And the first transistor Q4, for generating simulation electric leakage according to the result of the comparison
Signal.In Fig. 1, reference voltage generates subelement and is formed by the bleeder circuit that R7 and R8 are constituted.Periodic voltage generates subelement
It is formed by the first resistor R9 and first capacitor device C10 that are connected in series.Simulating electric leakage signal is to be greater than electric leakage threshold on zero curve N
The leakage current of value.
Self-checking feedback closing unit 5 includes: second transistor Q3 and is connected with the control electrode of second transistor Q3
Resistance R15.The control electrode of second transistor Q3 is connected by resistance R15 with leak current fault detection unit 3, and the second crystal
Pipe Q3 is connected in parallel by its anode and cathode with first capacitor device C10.
In Fig. 1, the both ends of detection coil ZCT1 are coupled to the pin 1 and 4 of processor IC1, when detection coil ZCT1 is defeated
When voltage change out is greater than threshold value, the pin 5 of processor IC1 exports high level, otherwise, exports low level.Bridge circuit D1-
D4 is respectively coupled to firewire L, N line, and the pin 6 of processor IC1 is coupled to by resistance R1, 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 supply unit 1 with electric detection means, be used for as the use
Electric detection means power supply.The power supply unit 1 includes bridge circuit D1-D4.
In some embodiments of the present disclosure, self-test unit 4 further includes self test failure activation subelement, self test failure activation
Subelement is for example including resistance R12 and capacitor C11.Self test failure is occurring, is persistently being charged by resistance R12 to capacitor C11, with
Activate self test failure signal.And power supply switching units 2 can disconnect power supply according to the self test failure signal.
In some embodiments of the present disclosure, power supply switching units 2 include delay subelement, be implemented as include
The RC circuit of resistance R14 and capacitor C5.
After reset switch RESET resets, L, N supply lines will be powered on, and the ac power waveform between L line and N line is positive
String wave.
Below to power supply switching units 2, leak current fault detection unit 3, self-test unit 4 and self-checking feedback closing unit 5
Working principle is illustrated.
True electric leakage signal will not be generated in circuit under normal circumstances.At this point, when power switch SW1 is closed, input
LINE is connected with load LOAD.When power supply power supply, charged by first resistor R9 to first capacitor device C10 in self-test unit 4,
When current potential is charged to the cathode pre-set value higher than comparator IC2, comparator IC2 overturns and exports high potential, makes the first crystalline substance
Body pipe Q4 conducting provides the leakage current of simulation to detection coil ZCT1 after the first transistor Q4 conducting, and processor IC1's draws
Foot 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 the limit of resistance R14 and capacitor C5.After second transistor Q3 conducting, short circuit
First capacitor device C10, to make the current potential on first capacitor device C10 reduce rapidly, the anodic potentials of comparator IC2 are reduced,
Comparator IC2 is closed, and the first transistor Q4 is closed, thus stop providing the self-test signal of simulation to leak current fault detection unit 3,
When comparator IC2 is closed, the pin 5 of processor IC1 also stops the activation of trigger signal, so that second transistor Q3 is disconnected.
First resistor R9 in self-checking circuit 4 starts to charge to first capacitor device C10 again, to realize next period self-test.
When there are drain conditions, detection coil ZCT1 detects that leakage current, the pin 5 of processor IC1 export triggering
Signal.At this point, second transistor Q3 is connected prior to transistor Q1 and Q2.Therefore, occurs simulation leakage current and true at the same time
In the case where leakage current, since second transistor Q3 is first connected, comparator IC2 can be closed, to avoid simulation leakage current
Influence to true leakage current.After simulation leakage current is in unactivated state, transistor Q1 and Q2 are just connected, thus
Tripping coil SOL obtains electric, power switch SW1 disconnection, to disconnect input LINE and load LOAD, to protect personal or property peace
Entirely.
And when there is self test failure, such as when capacitor C1 or detection coil ZCT1 short circuit, if passing through first resistor R9
First capacitor device C10 charging is 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 conducting.However, since capacitor C1 or detection coil ZCT1 short circuit, detection coil ZCT1 can't detect simulation electric leakage
Electric current, therefore the pin 5 of processor IC1 is low potential, so that second transistor Q3 cannot be made to be connected, first capacitor device C10
The current potential for being is consistently higher than the negative terminal of comparator IC2, and comparator IC2 exports high potential for a long time.At this point, resistance R12 gives capacitor C11
Charging, triggering transistor Q1, Q2 conducting after diode D7 conducting, tripping coil SOL obtains electric, power switch SW1 disconnection, thus 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 use two detection coil RING1 and
RING2.Make the detection to leakage current 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 increase manual reset circuit.Thus when causing power supply to disconnect due to self test failure or leak current fault
When, electric current can be made to rework by manual closing reset button RESET.
Although claims have been directed to the specific combination of feature and have formulated in this application, but it is to be understood that this public affairs
The range opened further 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
It informs, new claim can be formulated in any further application in the checking process of the application or as derived from it
At the combination of these features and/or these features.
Claims (12)
1. a kind of use electric detection means, comprising:
Self-test unit, for activating simulation electric leakage signal；
Leak current fault detection unit is leaked electricity in the simulation and is believed for detecting the simulation electric leakage signal and true electric leakage signal
Number and at least one of the true electric leakage signal in the presence of, the leak current fault detection unit activation trigger 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 at the scheduled time；And
Power supply switching units are detecting the trigger signal for detecting the trigger signal after the predetermined instant
In the case where, the power supply switching units disconnect power supply.
2. according to claim 1 use electric detection means, wherein the self-test unit periodically activates the simulation to leak
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 period
Different phase is respectively greater than and is less than the reference voltage；
Comparator, the voltage for the reference voltage and the mechanical periodicity；And
The first transistor, for generating the simulation according to the comparison result of the reference voltage and the voltage of the mechanical periodicity
Electric leakage signal.
4. according to claim 3 use electric detection means, wherein it includes being connected in series that the periodic voltage, which generates subelement,
First resistor and first capacitor device.
5. according to claim 4 use electric detection means, wherein the self-checking feedback closing unit includes the second crystal
Pipe, the control electrode of the second transistor are connected with the leak current fault detection unit, and second transistor is passing through it just
Pole and cathode are connected in parallel with the first capacitor device.
6. according to claim 1 use electric detection means, wherein the self-test unit further includes that self test failure activation is single
Member is used to activate self test failure signal in the case where self test failure occurs；
The power supply switching units disconnect power supply according to the self test failure signal.
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,
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 circuit.
10. it is according to claim 1 use electric detection means, wherein the power supply switching units include tripping coil or after
Electric appliance.
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 the tripping coil or the relay is made to be in inactive shape
State.
12. a kind of electric connecting device, which is characterized in that use electro-detection with 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 CN107579505A (en) | 2018-01-12 |
| CN107579505B true CN107579505B (en) | 2019-05-24 |
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| 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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| Country | Link |
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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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| CN107579505A (en) | 2018-01-12 |
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