CN108736439A - A kind of earth leakage protective device - Google Patents
A kind of earth leakage protective device Download PDFInfo
- Publication number
- CN108736439A CN108736439A CN201810803515.3A CN201810803515A CN108736439A CN 108736439 A CN108736439 A CN 108736439A CN 201810803515 A CN201810803515 A CN 201810803515A CN 108736439 A CN108736439 A CN 108736439A
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- China
- Prior art keywords
- leakage
- chip
- mutual inductor
- protective device
- coil
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Classifications
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- 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
- 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
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of earth leakage protective devices, are related to earth leakage protective device field, including upper electric coil, tripping coil, mutual inductor, leakage guarantor chip, resetting module and judgment module；Upper electric coil is for powering on；Tripping coil is used for deenergization；It resets module and protects chip for resetting leakage；Judgment module is protected chip communication with resetting module and leakage respectively and is connect；Leakage protects chip and communicates connection with mutual inductor, and when mutual inductor detects electric leakage, mutual inductor protects chip to leakage and sends out electric leakage signal, after leakage guarantor's chip receives electric leakage signal, output power-off signal so that tripping coil deenergization；When judgment module detects that leakage protects chip and exports the duration of power-off signal constantly more than preset duration, chip is protected in judgment module control resetting module reset leakage, do not stop exporting power-off signal if chip is protected in leakage, controls tripping coil deenergization, and permanent ban powers on coil switch power.Compared with prior art, the present invention improves the safety in utilization of earth leakage protective device.
Description
Technical field
The present invention relates to earth leakage protective device field more particularly to a kind of earth leakage protective devices.
Background technology
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.
The earth leakage protective device for having earth wire charged protecting as disclosed in Chinese invention CN3178492A, including each band are opened
The phase line L of pass, zero curve N, tri- poles ground wire E pass through 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 invention can detect whether zero curve, firewire and ground wire leak electricity simultaneously, if the invention itself is sent out
Raw failure, just cannot achieve earth leakage protective so that user is directly exposed among the risk of electric shock.
Invention content
One, technical problems to be solved
For the 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, a kind of earth leakage protective device is provided, including upper electric coil, tripping coil, mutual inductor, leakage guarantor
Chip, resetting module and judgment module；
Upper electric coil is for powering on；
Tripping coil is used for deenergization；
It resets module and protects chip for resetting leakage；
Judgment module is protected chip communication with resetting module and leakage respectively and is connect；
Leakage is protected chip and is connected with mutual inductor communication, and when mutual inductor detects electric leakage, mutual inductor protects chip to leakage and sends out leakage
Electric signal exports power-off signal so that tripping coil deenergization after leakage guarantor's chip receives electric leakage signal；
When judgment module detects that leakage protects the duration of chip output power-off signal more than preset duration, judgment module control
It resets module reset leakage and protects chip, if leakage protects chip and do not stop exporting power-off signal, judgment module controls tripping coil and disconnects
Power supply, and permanent ban powers on coil switch power.
Wherein, when judgment module can not work normally, leakage protects chip and keeps normal operating conditions.
Wherein, latch there are two the interior settings of chip is protected in leakage.
Wherein, judgment module is connect with the output end communication of leakage guarantor's chip.
Wherein, judgment module is microcontroller.
Wherein, mutual inductor is zero firewire mutual inductor, and mutual inductor further includes ground wire mutual inductor.
Wherein, judgment module by detect leak protect chip export power-off signal duration, judge leakage protect chip whether failure.
Three, beneficial effects of the present invention
Compared with prior art, the present invention protects the interference that chip normal work does not need to microcontroller by leakage, therefore i.e.
Make when microcontroller breaks down, the creepage protection function of earth leakage protective device will not be affected, and improve the present invention
Safety；
The output end communication for also protecting chip with leakage by microcontroller is connect, and it is more than pre- to protect chip persistently to export high level when leakage
If when duration, microcontroller control resetting module resets leakage and protects chip again, if leakage protects chip and still exports high level, microcontroller control
Tripping coil deenergization processed, and forbid powering on coil switch power, microcontroller can also ignore the signal that all requests power on,
Including but not limited to user presses the reset key of earth leakage protective device so that protects chip failure in leakage, can not complete electric leakage and protect
When the function of shield, microcontroller controls tripping coil deenergization, goes back permanent ban water heater and powers on, further improves the present invention
Safety in utilization.
Description of the drawings
Fig. 1 is the module map of the present invention；
Fig. 2 is the oscillogram 1 of the embodiment of the present invention 1；
Fig. 3 is the oscillogram 2 of the embodiment of the present invention 1.
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Implement below
Example cannot be used for limiting the scope of the invention for illustrating the present invention.
Embodiment 1：
In the present embodiment, apply the present invention on water heater, judgment module is microcontroller, and mutual inductor is that zero firewire is mutual
Sensor.
As shown in Figure 1, upper electric coil is connect with microcontroller communication, zero firewire mutual inductor is protected chip communication with leakage and is connect, weight
It sets module to connect with microcontroller communication, also protecting chip with leakage is electrically connected；Leakage protect chip output end respectively with tripping coil and list
Piece mechatronics；Microcontroller is connected with tripping coil communication.
As shown in Fig. 2, when chip normal work is protected in leakage：When zero firewire mutual inductor detects that zero curve or firewire have electric leakage
When, it protects chip to leakage and sends out an electric leakage signal, after leakage guarantor's chip receives the signal, the latch tumble lock in chip is protected in leakage
It deposits, the output end that chip is protected in leakage exports high level, controls tripping coil deenergization；Chip output height can be protected in leakage by resetting module
The latch in chip is protected in resetting leakage when level so that leakage protects chip and stops output high level, also allows for leakage and protects the defeated of chip
Outlet will not continue output high level.
Leakage protects chip normal work and does not need to the interference of microcontroller, therefore even if when microcontroller breaks down,
The creepage protection function of earth leakage protective device will not be affected, and improve the safety of the present invention.
As shown in figure 3, when leakage is protected chip and is not worked normally：When zero firewire mutual inductor detects that zero curve or firewire have leakage
When electric, protect chip to leakage and send out an electric leakage signal, after leakage guarantor's chip receives the signal, the latch overturning in chip is protected in leakage
It latches, the output end that chip is protected in leakage exports a high level, controls tripping coil deenergization, and resetting module can protect chip in leakage
The latch in chip is protected in resetting leakage when exporting high level, because failure of chip or resetting module failure are protected in leakage, leakage is caused to be protected
Chip does not stop exporting high level, and the output end communication that microcontroller protects chip with leakage is connect, and protecting chip when leakage persistently exports high electricity
When putting down more than preset duration, microcontroller control resetting module resets leakage guarantor's chip again, and in the present embodiment, preset duration is
1ms, if leakage protects chip and still exports high level, microcontroller controls tripping coil deenergization, and upper electric coil is forbidden to connect electricity
Source, microcontroller can also ignore the signal that all requests power on, and including but not limited to user presses the reset key of earth leakage protective device.
The output end communication that the present invention protects chip by microcontroller with leakage is connect, and is surpassed when leakage guarantor's chip persistently exports high level
When crossing preset duration, microcontroller control resetting module resets leakage and protects chip again, if leakage protects chip and still exports high level, monolithic
Machine controls tripping coil deenergization, and forbids powering on coil switch power, and microcontroller can also ignore what all requests powered on
Signal, including but not limited to user press the reset key of earth leakage protective device so that protect chip failure in leakage, can not complete to leak
When the function of electric protection, microcontroller controls tripping coil deenergization, goes back permanent ban water heater and powers on, and further improves this
The safety in utilization of invention.
Embodiment 2：
The present embodiment and embodiment 1 difference lies in：
The present embodiment further includes ground wire mutual inductor, and setting in chip is protected in leakage, and there are two latch；
When ground wire mutual inductor detects ground wire electric leakage, protects chip to leakage and send out an electric leakage signal, leakage is protected chip and received
To after the signal, the latch overturning that leakage is protected in chip is latched, and the output end that chip is protected in leakage exports a high level, and control is threaded off
Coil deenergization.
Embodiment of above is merely to illustrate the present invention, and not limitation of the present invention, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all
Equivalent technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (7)
1. a kind of earth leakage protective device, which is characterized in that the earth leakage protective device includes upper electric coil, tripping coil, mutual inductor, leakage
Protect chip, resetting module and judgment module；
The upper electric coil is for powering on；
The tripping coil is used for deenergization；
The resetting module protects chip for resetting the leakage；
The judgment module is protected chip communication with the resetting module and the leakage respectively and is connect；
The leakage is protected chip and is connected with mutual inductor communication, and when the mutual inductor detects electric leakage, the mutual inductor is to institute
It states leakage guarantor's chip and sends out electric leakage signal, after the leakage guarantor chip receives electric leakage signal, output power-off signal so that the dropout
Coil deenergization；
When the judgment module detects that the leakage protects the duration of chip output power-off signal more than preset duration, the judgement
Module controls leakage described in the resetting module reset and protects chip, described if the leakage protects chip and do not stop exporting power-off signal
Judgment module controls the tripping coil deenergization, and coil switch power is powered on described in permanent ban.
2. a kind of earth leakage protective device as described in claim 1, which is characterized in that when the judgment module failure, the leakage
It protects chip and keeps normal operating conditions.
3. a kind of earth leakage protective device as described in claim 1, which is characterized in that setting in chip is protected in the leakage, and there are two latch
Device.
4. a kind of earth leakage protective device as described in claim 1, which is characterized in that the judgment module protects chip with the leakage
Export end communication connection.
5. a kind of earth leakage protective device as described in claim 1, which is characterized in that the judgment module is microcontroller.
6. a kind of earth leakage protective device as described in claim 1, which is characterized in that the mutual inductor is zero firewire mutual inductor.
7. a kind of earth leakage protective device as claimed in claim 6, which is characterized in that the mutual inductor further includes ground wire mutual inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810803515.3A CN108736439B (en) | 2018-07-20 | 2018-07-20 | Leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810803515.3A CN108736439B (en) | 2018-07-20 | 2018-07-20 | Leakage protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108736439A true CN108736439A (en) | 2018-11-02 |
| CN108736439B CN108736439B (en) | 2020-04-28 |
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ID=63927223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810803515.3A Active CN108736439B (en) | 2018-07-20 | 2018-07-20 | Leakage protector |
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| Country | Link |
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| CN (1) | CN108736439B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818332A (en) * | 2019-02-19 | 2019-05-28 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device having ground wire missing protection |
| CN111486599A (en) * | 2020-03-20 | 2020-08-04 | 广东万家乐燃气具有限公司 | Electric water heater electric leakage detection system and electric water heater |
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| CN1897382A (en) * | 2006-06-20 | 2007-01-17 | 陈景正 | Controlling circuit of inleakage protector with life-stop indicator and releaser |
| US20070146944A1 (en) * | 2005-12-27 | 2007-06-28 | General Protecht Group, Inc. | Apparatus and methods for testing the life of a leakage current protection device |
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| CN103532092A (en) * | 2013-10-14 | 2014-01-22 | 南京欧格节能科技有限公司 | Novel electric leakage protector |
| CN104283180A (en) * | 2014-09-09 | 2015-01-14 | 深圳华智测控技术有限公司 | Leakage detection protection device of street lamp and leakage detection protection method thereof |
| CN104795789A (en) * | 2015-03-20 | 2015-07-22 | 张家港市佰瑞普电器科技有限公司 | Automatic monitoring circuit for earth fault leakage protector |
| CN208908356U (en) * | 2018-07-20 | 2019-05-28 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device |
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2018
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Patent Citations (7)
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| US20070146944A1 (en) * | 2005-12-27 | 2007-06-28 | General Protecht Group, Inc. | Apparatus and methods for testing the life of a leakage current protection device |
| CN1897382A (en) * | 2006-06-20 | 2007-01-17 | 陈景正 | Controlling circuit of inleakage protector with life-stop indicator and releaser |
| CN200969509Y (en) * | 2006-11-21 | 2007-10-31 | 陈景正 | Earthing fault breaker service life expiration intelligent detection protective circuit |
| CN103532092A (en) * | 2013-10-14 | 2014-01-22 | 南京欧格节能科技有限公司 | Novel electric leakage protector |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818332A (en) * | 2019-02-19 | 2019-05-28 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device having ground wire missing protection |
| CN109818332B (en) * | 2019-02-19 | 2024-04-30 | 余姚市嘉荣电子电器有限公司 | Leakage protector with ground wire missing protection |
| CN111486599A (en) * | 2020-03-20 | 2020-08-04 | 广东万家乐燃气具有限公司 | Electric water heater electric leakage detection system and electric water heater |
| CN111486599B (en) * | 2020-03-20 | 2021-05-14 | 广东万家乐燃气具有限公司 | Electric water heater electric leakage detection system and electric water heater |
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| Publication number | Publication date |
|---|---|
| CN108736439B (en) | 2020-04-28 |
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