CN208908355U - A kind of safe earth leakage protective device - Google Patents
A kind of safe earth leakage protective device Download PDFInfo
- Publication number
- CN208908355U CN208908355U CN201821154422.4U CN201821154422U CN208908355U CN 208908355 U CN208908355 U CN 208908355U CN 201821154422 U CN201821154422 U CN 201821154422U CN 208908355 U CN208908355 U CN 208908355U
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- protective device
- mutual inductor
- module
- earth leakage
- leakage protective
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Abstract
The utility model discloses a kind of safe earth leakage protective devices, are related to earth leakage protective device field, including chip is protected in upper electric coil, tripping coil, the first mutual inductor, the second mutual inductor and leakage；Upper electric coil is for powering on；Tripping coil is for disconnecting power supply；Chip and the first mutual inductor communication connection are protected in leakage, and when the first mutual inductor detects electric leakage, the first mutual inductor issues the first electric leakage signal to guarantor's chip is leaked, after chip the first electric leakage signal of reception is protected in leakage, sending power-off signal；Chip and the second mutual inductor communication connection are protected in leakage, and when the second mutual inductor detects electric leakage, the second mutual inductor issues the second electric leakage signal to guarantor's chip is leaked, after chip the second electric leakage signal of reception is protected in leakage, sending power-off signal；Compared with prior art, the utility model improves the safety in utilization of earth leakage protective device by self-test before powering on or timer-controlled self-inspection.
Description
Technical field
The utility model relates to earth leakage protective device field more particularly to a kind of safe earth leakage protective devices.
Background technique
With the improvement of living standards, the popularity rate of pot-type boiler is also higher and higher, the event got an electric shock using water heater
And it is commonplace, therefore the safety of one earth leakage protective device protection user of water heater needs, and existing earth leakage protective device
There are many deficiencies.
Has the earth leakage protective device of earth wire charged protecting as disclosed in Chinese invention CN3178492A, including each band is opened
The phase line L of pass, zero curve N, tri- pole ground wire E, across the phase line L, zero sequence current mutual inductor of zero curve N, hookup, buckle releaser, whole
It is current circuit, power voltage step down, silicon-controlled, also set up a current detector and double input end amplifier, the primary of current detector
Coil one end is connect with ground wire E, the primary coil other end of current detector concatenate after big resistance value current limliting reduction voltage circuit with zero curve N
Connection, the secondary coil of current detector are connect with an input terminal of double input end amplifier, and the two of double input end amplifier
A output end is connect with two silicon-controlled trigger electrodes respectively, and the output end of zero sequence current mutual inductor accesses double input end amplifier
Another input terminal；Although the utility model can detect simultaneously whether zero curve, firewire and ground wire leak electricity, the utility model is such as
Fruit itself fail, just cannot achieve earth leakage protective, so that user is directly exposed among the risk of electric shock.
Utility model content
One, technical problems to be solved
For drawbacks described above present in the prior art, the safety in utilization of earth leakage protective device is improved.
Two, technical solution
To solve the above problems, providing a kind of safe earth leakage protective device, earth leakage protective device includes upper electric coil, tripping
Chip is protected in coil, the first mutual inductor, the second mutual inductor and leakage；
Upper electric coil is for powering on；
Tripping coil is for disconnecting power supply；
Chip and the first mutual inductor communication connection are protected in leakage, and when the first mutual inductor detects electric leakage, the first mutual inductor is to leakage
It protects chip and issues the first electric leakage signal, leak after protecting chip the first electric leakage signal of reception, issue power-off signal；
Chip and the second mutual inductor communication connection are protected in leakage, and when the second mutual inductor detects electric leakage, the second mutual inductor is to leakage
It protects chip and issues the second electric leakage signal, leak after protecting chip the second electric leakage signal of reception, issue power-off signal；
Earth leakage protective device further includes the first mutual inductor detection module, the second mutual inductor detection module, judgment module, resetting mould
Block and lock-in circuit；
Lock-in circuit prevents earth leakage protective device mutual in the first mutual inductor detection module and second for locking earth leakage protective device
It trips when the simulation electric leakage of sensor detection module；
When the first mutual inductor detection module, which is simulated, to leak electricity, judgment module detection leakage protects whether chip issues power-off signal,
If not issuing power-off signal, judgment module control tripping coil disconnects power supply and permanent ban powers on coil switch power；If
Power-off signal is issued, then resets module reset earth leakage protective device；
When the second mutual inductor detection module, which is simulated, to leak electricity, judgment module detection leakage protects whether chip issues power-off signal,
If not issuing power-off signal, judgment module control tripping coil disconnects power supply and permanent ban powers on coil switch power；If
Power-off signal is issued, then resets module reset earth leakage protective device.
Wherein, earth leakage protective device further includes powering on Coil Detector module；
Whether judgment module is normal by powering on the upper electric coil of Coil Detector module detection, then sounds an alarm if abnormal,.
Wherein, earth leakage protective device further includes powering on Coil Detector module；Judgment module is examined by tripping coil detection module
It whether normal surveys tripping coil, then sounds an alarm if abnormal,.
Wherein, the first mutual inductor is zero sequence transformer, and the second mutual inductor is ground wire mutual inductor.
Wherein, the first mutual inductor is ground wire mutual inductor, and the second mutual inductor is zero sequence transformer.
Wherein, earth leakage protective device further includes alarm module, and alarm module is for sounding an alarm.
Wherein, earth leakage protective device further includes alternating current detection module；Judgment module acquires alternating current by alternating current detection module
Clock signal disconnects power supply if judgment module does not collect clock signal, and after disconnecting power supply, upper electric coil is forbidden to connect
Energization source, until collecting clock signal.
Wherein, judgment module also passes through the voltage value of alternating current detection module acquisition alternating current, and judges that the voltage value of alternating current is
Within a preset range, if the voltage value of alternating current is not located within a preset range, to disconnect power supply, and after disconnecting power supply, prohibit at no place
Coil switch power is only powered on, at the voltage value of alternating current within a preset range.
Wherein, latch there are two the interior settings of chip is protected in leakage.
Wherein, earth leakage protective device further includes temperature detecting module；Judgment module by temperature detecting module acquire pin and
Temperature value between socket, and by the collected temperature value of temperature detecting module compared with preset temperature value, if temperature detection
The collected temperature value of module is more than preset temperature value, then disconnects power supply, and after disconnecting power supply, and upper electric coil is forbidden to connect
Power supply, until collected temperature value is lower than preset temperature value.
Three, the beneficial effects of the utility model
Compared with prior art, the utility model is by powering on preceding self-test or timer-controlled self-inspection, electric coil, tripping in detection
Whether coil, zero sequence transformer and ground wire mutual inductor are normal, and sound an alarm or disconnect power supply when abnormal, reduce electric leakage
The bring security risk to user that protector faults itself causes, improves the safety in utilization of earth leakage protective device；
Also by detection line voltage and alternating current timing, and power supply is disconnected in city's electrical anomaly, prevented because of alternating current shakiness
Security risk caused by fixed, further improves the safety in utilization of earth leakage protective device；
Also by the temperature between detection pin receptacle, and disconnect power supply in temperature overtemperature, effectively prevent pin and
The fire that poor contact between socket causes, further improves the safety in utilization of earth leakage protective device；
Also by when an exception is detected, taking temporarily/permanent limit to reset, it ensure that exception occur in earth leakage protective device
In the case where, load is forbidden powering on, and further improves the safety in utilization of earth leakage protective device.
Wherein, when judgment module control tripping coil disconnects power supply and permanent ban powers on coil switch power, can also
Control alarm module sounds an alarm.
Detailed description of the invention
Fig. 1 is the module map of the utility model；
Fig. 2 is the flow chart of the embodiments of the present invention 1.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment cannot be used to limit the scope of the utility model for illustrating the utility model.
Embodiment 1:
As shown in Figure 1, whether power on detection module normal for detecting electric coil, and it will test result and be sent to judgement
Module；
Whether tripping detection module is normal for detecting tripping coil, and will test result and be sent to judgment module；
Temperature detecting module is used to detect the temperature between pin and socket, and the temperature value that will test is sent to judgement
Module；
Alternating current detection module is sent to judgment module for acquiring alternating current clock signal and voltage value；
In the present embodiment, the first mutual inductor is zero sequence transformer, for detecting whether zero curve and firewire leak electricity, and is being examined
Chip, which is protected, to leakage when measuring electric leakage issues the first electric leakage signal；
First mutual inductor detection module is zero sequence transformer detection module, is leaked electricity for simulating zero curve and firewire；
Second mutual inductor is ground wire mutual inductor, protects core to leakage for detecting whether ground wire leaks electricity, and when detecting electric leakage
Piece issues the second electric leakage signal；
Second mutual inductor detection module is ground wire mutual inductor detection module, is leaked electricity for simulation ground wire；
After leakage guarantor's chip receives the first electric leakage signal or the second electric leakage signal, power-off signal is issued to judgment module, is sentenced
Control tripping coil disconnects power supply after disconnected module receives the signal；
It is worth noting that, first detecting a mutual inductor to realize, then another mutual inductor is detected, the utility model
It leaks to protect in chip and be arranged there are two latch, certain those of ordinary skill in the art, can also use two monolock storage cores
The mode that piece is combined is realized；
Resetting module protects chip and judgment module communication connection with leakage respectively for resetting earth leakage protective device；
Lock-in circuit prevents earth leakage protective device mistrip in the detection process for locking earth leakage protective device, respectively with leakage
Protect chip and judgment module communication connection.
The present embodiment also provides an alarm module, and for sounding an alarm, it can also be buzzing that alarm module, which is LED lamp,
Device etc. can issue the device of sound-light alarm.
As shown in Fig. 2, before powering on or the preset self-test time:
Alternating current clock signal detecting step is first carried out: judgment module acquires the timing letter of alternating current by alternating current detection module
Number, if clock signal is normal, enter temperature detection step；If judgment module does not collect clock signal, judgment module control
Tripping coil processed disconnects power supply, and temporal limitation resets, and then judgment module persistently detects whether clock signal restores, and works as timing
When signal restores, judgment module lifts restrictions resets, and into temperature detection step；
In this application, limitation is resetted and referred to: judgment module is forbidden powering on coil switch power, and judgment module can also nothing
Depending on all signals for requesting to power on, including but not limited to user presses the reset key on earth leakage protective device；
Then execute temperature detection step: judgment module acquires the temperature between pin and socket by temperature detecting module
Value, and compared with preset temperature value, in the present embodiment, preset temperature value is 180 degrees Celsius, if between pin and socket
Temperature value is lower than 180 degrees Celsius, then enters line voltage detecting step；If the temperature value between pin and socket is more than 180 to take the photograph
Family name's degree, then judgment module control tripping coil disconnect power supply, and temporal limitation reset, then judgment module persistently detect pin with
Whether the temperature value between socket is lower than 180 degrees Celsius, when the temperature value between pin and socket is down to 180 degrees Celsius or less
When, judgment module lifts restrictions reset, and enters line voltage detecting step；
Then execute line voltage detecting step: judgment module acquires the voltage value of alternating current by alternating current detection module, and
Judge whether the voltage value of alternating current is located within a preset range, in the present embodiment, preset range is 220V ± 30%, if alternating current is electric
When pressure is in this section 154V-286V, then enter tripping coil detecting step；If line voltage is lower than 154V or is higher than
When 286V, then judgment module control tripping coil disconnects power supply, and temporal limitation resets, and then judgment module persistently detects alternating current
Whether voltage restores to preset range, and when line voltage restores to this section 154V-286V, judgment module releases limit
System resets, and enters tripping coil detecting step；
Then execute tripping coil detecting step: judgment module is judged by the voltage value that tripping coil detection module exports
Whether tripping coil is normal, if the voltage value of tripping coil detection module output is lower than preset value, judgment module control alarm
Module sounds an alarm, if being not less than preset value, enters and powers on Coil Detector step；
Then execute and power on Coil Detector step: judgment module is judged by powering on the voltage value of Coil Detector module output
Whether upper electric coil is normal, if powering on the voltage value of Coil Detector module output lower than preset value, judgment module control alarm mould
Block is sounded an alarm and is powered on without resetting, if being not less than preset value, enters mutual inductor detecting step；
Finally execute mutual inductor detecting step: lock-in circuit locks earth leakage protective device first, and earth leakage protective device is prevented to examine
Mistrip during survey；
Then zero sequence transformer detection module simulation zero curve and firewire leak electricity；
Then judgment module detection leakage protects whether chip issues power-off signal, if chip is protected in leakage does not issue power-off signal,
Judgment module, which controls tripping coil and disconnects power supply and permanently limit, to be resetted, and judgment module can also control alarm module and sound an alarm；
If issuing power-off signal, judgment module control resetting module reset earth leakage protective device；
Then ground wire mutual inductor detection module simulation ground wire is leaked electricity；
Then judgment module detection leakage protects whether chip issues power-off signal, if chip is protected in leakage does not issue power-off signal,
Judgment module, which controls tripping coil and disconnects power supply and permanently limit, to be resetted, and judgment module can also control alarm module and sound an alarm；
If issuing power-off signal, judgment module control resetting module reset earth leakage protective device；
Last lock-in circuit unlocks earth leakage protective device, terminates self-test.
The utility model powers on Coil Detector step, alternating current clock signal detecting step, temperature detection step, city to execution
Piezoelectric voltage detecting step, tripping coil detecting step and mutual inductor detecting step sequencing and be not limited, implementing
Sequencing described in example is only one of to use situation.
Compared with prior art, the utility model is by powering on preceding self-test or timer-controlled self-inspection, electric coil, tripping in detection
Whether coil, zero sequence transformer and ground wire mutual inductor are normal, and sound an alarm or disconnect power supply when abnormal, reduce electric leakage
The bring security risk to user that protector faults itself causes, improves the safety in utilization of earth leakage protective device；
Also by detection line voltage and alternating current timing, and power supply is disconnected in city's electrical anomaly, prevented because of alternating current shakiness
Security risk caused by fixed, further improves the safety in utilization of earth leakage protective device；
Also by the temperature between detection pin receptacle, and disconnect power supply in temperature overtemperature, effectively prevent pin and
The fire that poor contact between socket causes, further improves the safety in utilization of earth leakage protective device；
Also by when an exception is detected, taking temporarily/permanent limit to reset, it ensure that exception occur in earth leakage protective device
In the case where, load is forbidden powering on, and further improves the safety in utilization of earth leakage protective device.
Embodiment 2:
The present embodiment is with the difference of embodiment 1:
First mutual inductor is ground wire mutual inductor, protects core to leakage for detecting whether ground wire leaks electricity, and when detecting electric leakage
Piece issues the first electric leakage signal；
First mutual inductor detection module is ground wire mutual inductor detection module, is leaked electricity for simulation ground wire；
Second mutual inductor be zero sequence transformer, for detecting whether zero curve and firewire leak electricity, and when detecting electric leakage to
Leakage protects chip and issues the second electric leakage signal；
Second mutual inductor detection module is zero sequence transformer detection module, is leaked electricity for simulating zero curve and firewire.
Mutual inductor detecting step: lock-in circuit locks earth leakage protective device first, prevents earth leakage protective device in the detection process
Mistrip；
Then ground wire mutual inductor detection module simulation ground wire is leaked electricity；
Then judgment module detection leakage protects whether chip issues power-off signal, if chip is protected in leakage does not issue power-off signal,
Judgment module, which controls tripping coil and disconnects power supply and permanently limit, to be resetted, and judgment module can also control alarm module and sound an alarm；
If issuing power-off signal, judgment module control resetting module reset earth leakage protective device；
Then zero sequence transformer detection module simulation zero curve and firewire leak electricity；
Then judgment module detection leakage protects whether chip issues power-off signal, if chip is protected in leakage does not issue power-off signal,
Judgment module, which controls tripping coil and disconnects power supply and permanently limit, to be resetted, and judgment module can also control alarm module and sound an alarm；
If issuing power-off signal, judgment module control resetting module reset earth leakage protective device；
Last lock-in circuit unlocks earth leakage protective device.
Embodiment of above is merely to illustrate the utility model, and is not limitation of the utility model, related technology neck
The those of ordinary skill in domain, in the case where not departing from the spirit and scope of the utility model, can also make a variety of changes and
Modification, therefore all equivalent technical solutions also belong to the scope of the utility model, the scope of patent protection of the utility model is answered
It is defined by the claims.
Claims (11)
1. a kind of safe earth leakage protective device, which is characterized in that the earth leakage protective device includes upper electric coil, tripping coil,
Chip is protected in one mutual inductor, the second mutual inductor and leakage；
The upper electric coil is for powering on；
The tripping coil is for disconnecting power supply；
Chip and the first mutual inductor communication connection are protected in the leakage, when first mutual inductor detects electric leakage, described the
One mutual inductor protects chip to the leakage and issues the first electric leakage signal, and after chip the first electric leakage signal of reception is protected in the leakage, sending is disconnected
Electric signal；
Chip and the second mutual inductor communication connection are protected in the leakage, when second mutual inductor detects electric leakage, described the
Two mutual-inductor protects chip to the leakage and issues the second electric leakage signal, and after chip the second electric leakage signal of reception is protected in the leakage, sending is disconnected
Electric signal；
The earth leakage protective device further includes the first mutual inductor detection module, the second mutual inductor detection module, judgment module, resetting mould
Block and lock-in circuit；
The lock-in circuit prevents earth leakage protective device in the first mutual inductor detection module and institute for locking earth leakage protective device
Tripping when stating the simulation electric leakage of the second mutual inductor detection module；
When the first mutual inductor detection module, which is simulated, to leak electricity, it is disconnected whether the judgment module detection leakage guarantor chip issues
Electric signal, if not issuing power-off signal, the judgment module controls the tripping coil and disconnects described in power supply and permanent ban
Power on coil switch power；If issuing power-off signal, the resetting module reset earth leakage protective device；
When the second mutual inductor detection module, which is simulated, to leak electricity, it is disconnected whether the judgment module detection leakage guarantor chip issues
Electric signal, if not issuing power-off signal, the judgment module controls the tripping coil and disconnects described in power supply and permanent ban
Power on coil switch power；If issuing power-off signal, the resetting module reset earth leakage protective device.
2. a kind of safe earth leakage protective device as described in claim 1, which is characterized in that on the earth leakage protective device further includes
Electric coil detection module；
Whether the judgment module is normal by the Coil Detector module detection upper electric coil that powers on, if abnormal, then
It sounds an alarm.
3. a kind of safe earth leakage protective device as described in claim 1, which is characterized in that the earth leakage protective device further includes taking off
Fastening wire circle detection module；
Whether the judgment module is normal by the tripping coil detection module detection tripping coil, if abnormal, then
It sounds an alarm.
4. a kind of safe earth leakage protective device as described in claim 1, which is characterized in that first mutual inductor is that zero sequence is mutual
Sensor, second mutual inductor are ground wire mutual inductor.
5. a kind of safe earth leakage protective device as described in claim 1, which is characterized in that first mutual inductor is that ground wire is mutual
Sensor, second mutual inductor are zero sequence transformer.
6. a kind of safe earth leakage protective device as described in claim 1, which is characterized in that the earth leakage protective device further includes report
Alert module, the alarm module is for sounding an alarm.
7. a kind of safe earth leakage protective device as described in claim 1, which is characterized in that the earth leakage protective device further includes city
Electro-detection module；
The judgment module acquires the clock signal of alternating current by the alternating current detection module, if the judgment module does not collect
Clock signal then disconnects power supply, and after disconnecting power supply, forbid it is described power on coil switch power, until collecting timing letter
Number.
8. a kind of safe earth leakage protective device as claimed in claim 7, which is characterized in that the judgment module also passes through described
Alternating current detection module acquires the voltage value of alternating current, and judges whether the voltage value of alternating current is located within a preset range, if the electricity of alternating current
Pressure value is not located within a preset range, then to disconnect power supply, and after disconnecting power supply, forbid it is described power on coil switch power, until
At the voltage value of alternating current within a preset range.
9. a kind of safe earth leakage protective device as described in claim 1, which is characterized in that the leakage is protected in chip and is provided with two
A latch.
10. a kind of safe earth leakage protective device as described in claim 1, which is characterized in that the earth leakage protective device further includes
Temperature detecting module；
The judgment module acquires the temperature value between pin and socket by the temperature detecting module, and the temperature is examined
The collected temperature value of module is surveyed compared with preset temperature value, if the collected temperature value of the temperature detecting module is more than pre-
If temperature value, then disconnect power supply, and after disconnecting power supply, forbid it is described power on coil switch power, until collected temperature
Angle value is lower than preset temperature value.
11. a kind of safe earth leakage protective device as claimed in claim 6, which is characterized in that when the judgment module controls institute
It states tripping coil to disconnect when powering on coil switch power described in power supply and permanent ban, can also control the alarm module and issue police
Report.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821154422.4U CN208908355U (en) | 2018-07-20 | 2018-07-20 | A kind of safe earth leakage protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821154422.4U CN208908355U (en) | 2018-07-20 | 2018-07-20 | A kind of safe earth leakage protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208908355U true CN208908355U (en) | 2019-05-28 |
Family
ID=66612623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821154422.4U Withdrawn - After Issue CN208908355U (en) | 2018-07-20 | 2018-07-20 | A kind of safe earth leakage protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208908355U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066580A (en) * | 2018-07-20 | 2018-12-21 | 余姚市嘉荣电子电器有限公司 | A kind of safe earth leakage protective device |
-
2018
- 2018-07-20 CN CN201821154422.4U patent/CN208908355U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066580A (en) * | 2018-07-20 | 2018-12-21 | 余姚市嘉荣电子电器有限公司 | A kind of safe earth leakage protective device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190528 Effective date of abandoning: 20200417 |