CN108400571A - A kind of earth leakage protective device of leakage-current alarm - Google Patents
A kind of earth leakage protective device of leakage-current alarm Download PDFInfo
- Publication number
- CN108400571A CN108400571A CN201810372392.2A CN201810372392A CN108400571A CN 108400571 A CN108400571 A CN 108400571A CN 201810372392 A CN201810372392 A CN 201810372392A CN 108400571 A CN108400571 A CN 108400571A
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- CN
- China
- Prior art keywords
- leakage
- module
- current alarm
- alarm
- protective device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
- H02H3/042—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned combined with means for locating the fault
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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
- H02H3/14—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 occurrence of voltage on parts normally at earth potential
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of earth leakage protective devices of leakage-current alarm, are related to earth leakage protective device technical field, including：Control module, detection of electrical leakage module and leakage-current alarm module are protected in action module, leakage；Action module is used for deenergization；Leakage protects control module and is used for control action module deenergization；Detection of electrical leakage module is for detecting whether ground wire, firewire and zero curve leak electricity, and when detecting electric leakage, detection of electrical leakage module sends out electric leakage signal and sends out power-off signal after control module reception electric leakage signal is protected in leakage；Action module receives deenergization after power-off signal；Leakage-current alarm module sends out alarm after receiving power-off signal, and compared with prior art, earth leakage protective device not only disconnects the power supply of load; alarm is also sent out by leakage-current alarm module; and only leakage-current alarm module is powered off, can just make leakage-current alarm module stop alarm so that the present invention is safer.
Description
Technical field
The present invention relates to earth leakage protective device technical field more particularly to a kind of earth leakage protective devices of leakage-current alarm.
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, which can only occur
Deenergization when electric leakage, it is that water heater caused by what reason powers off, therefore user probably exists that user, which does not know,
In the case of unresolved leak source problem, trial is re-powered to water heater, this makes user be directly exposed to the risk of electric shock
In.
Invention content
One, technical problems to be solved
For the drawbacks described above present in the prior art, the relatively low problem of the safety in utilization of household electrical appliance.
Two, technical solution
To solve the above problems, providing a kind of earth leakage protective device of leakage-current alarm and including：Action module, leakage protect control mould
Block, detection of electrical leakage module and leakage-current alarm module；
Action module is used for deenergization；
Leakage protects control module and is used for control action module deenergization；
Detection of electrical leakage module is for detecting whether ground wire, firewire and zero curve leak electricity, when detecting electric leakage, detection of electrical leakage mould
Block sends out electric leakage signal and sends out power-off signal after control module reception electric leakage signal is protected in leakage；
Action module receives deenergization after power-off signal；Leakage-current alarm module sends out alarm after receiving power-off signal.
Wherein leakage-current alarm module includes isolation circuit, and leakage-current alarm module is logical by isolation circuit and leakage guarantor's control module
News connection.
Wherein isolation circuit is optocoupler.
Wherein leakage-current alarm module continuously sends out alarm after receiving power-off signal, until leakage-current alarm module is disconnected electricity
Source.
Wherein leakage-current alarm module further includes warning alarm generating unit, and warning alarm generating unit is used for out activating alarm.
Wherein warning alarm generating unit is LED light.
Wherein warning alarm generating unit is buzzer.
Wherein earth leakage protective device further includes temperature detecting module, and temperature detecting module is for detecting between pin and socket
Temperature, when temperature is more than preset value, temperature detecting module control action module deenergization.
Three, beneficial effects of the present invention
Compared with prior art, when detection of electrical leakage module of the invention detects electric leakage, earth leakage protective device not only disconnects negative
The power supply of load also sends out alarm by leakage-current alarm module, and only powers off leakage-current alarm module, can just make leakage-current alarm
Module stop alarm；Isolation circuit in also used leakage-current alarm module carries out leakage-current alarm module and other modules electrical
Isolation so that the present invention is safer.
Description of the drawings
Fig. 1 is the main modular annexation figure of the present invention；
Fig. 2 is the circuit diagram 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.
As shown in Figure 1, leakage guarantor's control control module is electric with action module, detection of electrical leakage module and leakage-current alarm module respectively
Connection.
As shown in Fig. 2, when zero sequence current mutual inductor ZCT1 detects that zero curve or firewire have electric leakage, induced voltage difference
The 1 and 2 port for inputting integrated chip U1, when leakage current intensity reaches preset value, 5 ports are in a manner of constant current to electricity
Hold C5 chargings, when capacitance voltage reaches preset value, 7 ports export high level, i.e. integrated chip U1 sends out power-off signal, through two poles
Pipe D3 triggering controllable silicon SCR conductings, tripping coil L1 are powered so that switch S1 is disconnected；Meanwhile power-off signal is transmitted to through optocoupler U2
Leakage-current alarm module, leakage-current alarm module enter alarm condition after receiving power-off signal, i.e. indicator light LED is lighted, and passes through three
Leakage-current alarm module is locked in alarm condition by pole pipe Q1 and triode Q2, is needed to power off leakage-current alarm module, that is, is pulled out leakage
Non-electricity protector plug could release alarm condition；Capacitance C13 and capacitance C11 is used to prevent the false triggering of leakage-current alarm module；It is logical
Optocoupler U2 is crossed by electric leakage module and integrated chip U1 communication connections, i.e., will be insulated between the output end of signal and input terminal so that
The present invention is safer.
Indicator light LED could alternatively be the component that buzzer etc. sends out sound-light alarm.
When ground line current mutual inductor ZCT2 detects that ground wire has electric leakage, induced voltage inputs the 2 of integrated chip U1 respectively
Port and 4 ports, when leakage current intensity reaches preset value, port 6 is charged in a manner of constant current to capacitance C6, capacitance voltage
When reaching preset value, 7 ports export high level, and through diode D3 triggering controllable silicon SCR conductings, tripping coil L1 is powered so that
S1 is disconnected, while leakage-current alarm module being made to enter alarm condition.
Embodiment 2:
As shown in Figure 1, the invention also includes temperature detecting module, temperature detecting module is electrically connected with action module, temperature
Detection module is used to detect the temperature between pin and socket, and when temperature is more than preset value, temperature detecting module makes controllably
Silicon SCR conductings, tripping coil L1 are powered so that switch S1 is disconnected, and leakage-current alarm module can't be made to enter alarm condition.
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 (8)
1. a kind of earth leakage protective device of leakage-current alarm, which is characterized in that the earth leakage protective device includes：Control is protected in action module, leakage
Molding block, detection of electrical leakage module and leakage-current alarm module；
The action module is used for deenergization；
The leakage protects control module for controlling the action module deenergization；
The detection of electrical leakage module is for detecting whether ground wire, firewire and zero curve leak electricity, when detecting electric leakage, the electric leakage inspection
Survey module sends out electric leakage signal and sends out power-off signal after control module reception electric leakage signal is protected in the leakage；
The action module receives deenergization after power-off signal；The leakage-current alarm module sends out police after receiving power-off signal
Report.
2. a kind of earth leakage protective device of leakage-current alarm as described in claim 1, which is characterized in that the leakage-current alarm module packet
Containing isolation circuit, the leakage-current alarm module is protected control module communication by the isolation circuit and the leakage and is connected.
3. a kind of earth leakage protective device of leakage-current alarm as claimed in claim 2, which is characterized in that the isolation circuit is light
Coupling.
4. a kind of earth leakage protective device of leakage-current alarm as described in claim 1, which is characterized in that the leakage-current alarm module connects
Alarm is continuously sent out after receiving power-off signal, until the leakage-current alarm module is disconnected power supply.
5. a kind of earth leakage protective device of leakage-current alarm as claimed in claim 2, which is characterized in that the leakage-current alarm module is also
Including warning alarm generating unit, the warning alarm generating unit is used for out activating alarm.
6. a kind of earth leakage protective device of leakage-current alarm as claimed in claim 5, which is characterized in that the warning alarm generating unit is
LED light.
7. a kind of earth leakage protective device of leakage-current alarm as claimed in claim 5, which is characterized in that the warning alarm generating unit is
Buzzer.
8. a kind of earth leakage protective device of leakage-current alarm as described in claim 1, is characterized in that, the earth leakage protective device further includes
Temperature detecting module, the temperature detecting module are used to detect the temperature between pin and socket, when temperature is more than preset value,
The temperature detecting module controls the action module deenergization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810372392.2A CN108400571B (en) | 2018-04-24 | 2018-04-24 | Leakage protector with leakage alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810372392.2A CN108400571B (en) | 2018-04-24 | 2018-04-24 | Leakage protector with leakage alarm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108400571A true CN108400571A (en) | 2018-08-14 |
| CN108400571B CN108400571B (en) | 2020-10-30 |
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ID=63100335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810372392.2A Active CN108400571B (en) | 2018-04-24 | 2018-04-24 | Leakage protector with leakage alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108400571B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066583A (en) * | 2018-09-17 | 2018-12-21 | 余姚市嘉荣电子电器有限公司 | A kind of safe leakage protection system |
| CN110297156A (en) * | 2019-08-15 | 2019-10-01 | 山东凌宝智能科技有限公司 | A kind of circuit and method by electrical leakage voltage detection electric leakage |
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| US20080112100A1 (en) * | 2006-11-10 | 2008-05-15 | Daniel Liu | Digital electric leakage detecting and monitoring device |
| CN105576603A (en) * | 2016-01-05 | 2016-05-11 | 余姚市嘉荣电子电器有限公司 | Double-input leakage protector |
| CN106253217A (en) * | 2016-09-07 | 2016-12-21 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device and method of work thereof |
| CN206209036U (en) * | 2016-11-30 | 2017-05-31 | 佛山奇正电气有限公司 | A kind of leakage-current alarm circuit |
| CN107154612A (en) * | 2017-07-18 | 2017-09-12 | 余姚市嘉荣电子电器有限公司 | A kind of dual input circuit for electric leakage protector |
| CN107769158A (en) * | 2017-09-27 | 2018-03-06 | 余姚市嘉荣电子电器有限公司 | A kind of safe leakage protection circuit |
| CN208094162U (en) * | 2018-04-24 | 2018-11-13 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device of leakage-current alarm |
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2018
- 2018-04-24 CN CN201810372392.2A patent/CN108400571B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080112100A1 (en) * | 2006-11-10 | 2008-05-15 | Daniel Liu | Digital electric leakage detecting and monitoring device |
| CN105576603A (en) * | 2016-01-05 | 2016-05-11 | 余姚市嘉荣电子电器有限公司 | Double-input leakage protector |
| CN106253217A (en) * | 2016-09-07 | 2016-12-21 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device and method of work thereof |
| CN206209036U (en) * | 2016-11-30 | 2017-05-31 | 佛山奇正电气有限公司 | A kind of leakage-current alarm circuit |
| CN107154612A (en) * | 2017-07-18 | 2017-09-12 | 余姚市嘉荣电子电器有限公司 | A kind of dual input circuit for electric leakage protector |
| CN107769158A (en) * | 2017-09-27 | 2018-03-06 | 余姚市嘉荣电子电器有限公司 | A kind of safe leakage protection circuit |
| CN208094162U (en) * | 2018-04-24 | 2018-11-13 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device of leakage-current alarm |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066583A (en) * | 2018-09-17 | 2018-12-21 | 余姚市嘉荣电子电器有限公司 | A kind of safe leakage protection system |
| CN109066583B (en) * | 2018-09-17 | 2023-09-12 | 余姚市嘉荣电子电器有限公司 | Safe electric leakage protection system |
| CN110297156A (en) * | 2019-08-15 | 2019-10-01 | 山东凌宝智能科技有限公司 | A kind of circuit and method by electrical leakage voltage detection electric leakage |
| CN110297156B (en) * | 2019-08-15 | 2024-04-05 | 山东凌宝智能科技有限公司 | Circuit and method for detecting electric leakage through electric leakage voltage |
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| Publication number | Publication date |
|---|---|
| CN108400571B (en) | 2020-10-30 |
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